50 results on '"Maganga L"'
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2. East African HIV care: depression and HIV outcomes.
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Meffert, SM, Neylan, TC, McCulloch, CE, Maganga, L, Adamu, Y, Kiweewa, F, Maswai, J, Owuoth, J, Polyak, CS, Ake, JA, and Valcour, VG
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Depression ,HIV ,sub-Saharan Africa ,Clinical Sciences ,Public Health and Health Services - Abstract
Importance:Depression is a common co-morbidity for people living with HIV (PLWH) and is associated with elevated plasma HIV RNA levels. While depression correlates with deficits in antiretroviral (ARV) adherence, little data exist to inform the relationship between depression and HIV vial load more broadly. Objective:To examine the relationship between depression and viral load in the African Cohort Study (AFRICOS) independently of ARV adherence. Design:PLWH in Kenya, Uganda and Tanzania underwent screening for depression using the Center for Epidemiologic Studies Depression Scale (CESD) upon enrollment at AFRICOS HIV care sites. Setting:AFRICOS is an ongoing prospective longitudinal cohort study enrolling HIV-infected adults at HIV care centers including sites in Kenya, Tanzania and Uganda. These sites are administered by President's Emergency Plan For AIDS Relief programs. Participants:HIV+ individuals were eligible if they were at least 18 years old, receiving HIV care at the enrolling clinic and consented to data and specimen collection. Main outcome measure:CESD. Results:Among 2307 participants, 18-25% met the CESD threshold for depression. Depression was associated with decreased ARV adherence (OR 0.59, p = 0.01). Higher scores on three CESD items were significantly associated with 209-282% higher viral load, independently of ARV adherence among participants on ARVs ⩾6 months. Conclusions:PLWH had high prevalence of depression on the CESD. Diverse depression symptoms were independently associated with increases in viral load, underscoring the need for comprehensive treatment of depression.
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- 2019
3. Examining oral pre-exposure prophylaxis (PrEP) literacy among participants in an HIV vaccine trial preparedness cohort study
- Author
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Chimukuche, RS, Kawuma, R, Mahapa, N, Mkhwanazi, S, Singh, N, Siva, S, Ruzagira, E, Seeley, J, Gray, G, Gaffoor, Z, Morar, N, Sithole, T, Woeber, K, Hwengwere, E, Chidawanyika, RS, Khanyile, P, Jani, I, Viegas, E, Remane, I, Bule, O, Nhacule, E, Ramgi, P, Chissumba, R, Namalango, E, Manganhe, Y, Massingue, C, Capitine, I, Ribeiro, J, Maganga, L, William, W, Kapesa, E, Danstan, E, Pamba, D, Kway, MMA, Kisinda, A, Njovu, L, Sudi, L, Kunambi, R, Aboud, S, Munseri, P, Lyamuya, E, Msafiri, F, Joachim, A, Tarimo, E, Nagu, DFT, Buma, D, Bakari, M, Kaleebu, P, Kibengo, FM, Kakande, A, Serwanga, J, Holmes, CH, Kansiime, S, Kusemererwa, S, Masawi, S, Basajja, V, Vudriko, T, Hughes, P, Nabukenya, S, Mutonyi, G, Nakiboneka, R, Mugaba, S, Weber, J, Kingsley, C, Miller, T, McCormack, S, Crook, A, Dunn, D, Bern, H, Sy, A, Brodnicki, L, Joseph, S, Wenden, C, Chinyenze, K, Musau, J, Matsoso, M, Amondi, M, Chetty, P, Gumbe, A, Pantaleo, G, Ding, S, Nilsson, C, Kroidl, A, Fox, J, Doncel, G, Matthews, A, Rooney, J, Lee, C, and Robb, M
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AIDS Vaccines ,Cohort Studies ,Literacy ,Anti-HIV Agents ,Health Policy ,Humans ,Pre-Exposure Prophylaxis ,HIV Infections - Abstract
Background PrEP literacy is influenced by many factors including the types of information available and how it is interpreted. The level of PrEP literacy may influence acceptability and uptake. Methods We conducted 25 in-depth interviews in a HIV vaccine trial preparedness cohort study. We explored what participants knew about PrEP, sources of PrEP knowledge and how much they know about PrEP. We used the framework approach to generate themes for analysis guided by the Social Ecological Model and examined levels of PrEP literacy using the individual and interpersonal constructs of the SEM. Results We found that PrEP awareness is strongly influenced by external factors such as social media and how much participants know about HIV treatment and prevention in the local community. However, while participants highlighted the importance of the internet/social media as a source of information about PrEP they talked of low PrEP literacy in their communities. Participants indicated that their own knowledge came as a result of joining the HIV vaccine trial preparedness study. However, some expressed doubts about the effectiveness of the drug and worried about side effects. Participants commented that at the community level PrEP was associated with being sexually active, because it was used to prevent the sexual transmission of HIV. As a result, some participants commented that one could feel judged by the health workers for asking for PrEP at health facilities in the community. Conclusion The information collected in this study provided an understanding of the different layers of influence around individuals that are important to address to improve PrEP acceptability and uptake. Our findings can inform strategies to address the barriers to PrEP uptake, particularly at structural and community levels. Trial registration https://clinicaltrials.gov/ct2/show/NCT04066881
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- 2022
4. East African HIV care: depression and HIV outcomes
- Author
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Meffert, S. M., primary, Neylan, T. C., additional, McCulloch, C. E., additional, Maganga, L., additional, Adamu, Y., additional, Kiweewa, F., additional, Maswai, J., additional, Owuoth, J., additional, Polyak, C. S., additional, Ake, J. A., additional, and Valcour, V. G., additional
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- 2019
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5. East African HIV care: depression and HIV outcomes.
- Author
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Meffert, S. M., Neylan, T. C., McCulloch, C. E., Maganga, L., Adamu, Y., Kiweewa, F., Maswai, J., Owuoth, J., Polyak, C. S., Ake, J. A., and Valcour, V. G.
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VIRAL load ,SYMPTOMS ,EMERGENCY management ,AIDS ,HIV - Abstract
Importance.: Depression is a common co-morbidity for people living with HIV (PLWH) and is associated with elevated plasma HIV RNA levels. While depression correlates with deficits in antiretroviral (ARV) adherence, little data exist to inform the relationship between depression and HIV vial load more broadly. Objective.: To examine the relationship between depression and viral load in the African Cohort Study (AFRICOS) independently of ARV adherence. Design.: PLWH in Kenya, Uganda and Tanzania underwent screening for depression using the Center for Epidemiologic Studies Depression Scale (CESD) upon enrollment at AFRICOS HIV care sites. Setting.: AFRICOS is an ongoing prospective longitudinal cohort study enrolling HIV-infected adults at HIV care centers including sites in Kenya, Tanzania and Uganda. These sites are administered by President's Emergency Plan For AIDS Relief programs. Participants.: HIV+ individuals were eligible if they were at least 18 years old, receiving HIV care at the enrolling clinic and consented to data and specimen collection. Main outcome measure.: CESD. Results.: Among 2307 participants, 18–25% met the CESD threshold for depression. Depression was associated with decreased ARV adherence (OR 0.59, p = 0.01). Higher scores on three CESD items were significantly associated with 209–282% higher viral load, independently of ARV adherence among participants on ARVs ⩾6 months. Conclusions.: PLWH had high prevalence of depression on the CESD. Diverse depression symptoms were independently associated with increases in viral load, underscoring the need for comprehensive treatment of depression. [ABSTRACT FROM AUTHOR]
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- 2019
- Full Text
- View/download PDF
6. TUPDB0204: Very early initiation of combination antiviral therapy results in normal levels of markers of immune activation
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Kyrychenko, T., Dubynska, G., Koval, T., Kaidashev, I., Korshenko, V., Rono, K., Kibuuka, H., Maganga, L., Kosgei, J., Sekiziyivu, A., Sanga, E., Ngetich, E., Bolen Valenzuela, A., Michael, N., Robb, M., Markowitz, M., Evering, T., Figueroa, A., Rodriguez, K., La Mar, M., Garmon, D., Sahi, V., Mohri, H., Asher, A., Santos, G.-M., Dokubo, E.K., Martin, J., Deeks, S., Tobler, L., Busch, M., Hunt, P., Page, K., Weber, R., Smith, C., Mannheimer, S., Wang, L., Tieu, H.V., del Rio, C., Buchbinder, S., Wilton, L., Glick, S., Cummings, V., Mayer, K.H., Hutchinson, A., Sansom, S., Farnham, P., Davis, R., Dzoro, S., Moyo, S., Gaseitsiwe, S., Musonda, R., Novitsky, V., Essex, M., Ouma, K., Basavaraju, S., Okonji, J., Williamson, J., Mills, L., Zeh, C., Vallabhaneni, S., Chandy, S., Heylen, E., Ekstrand, M.L., Manasa, J., McGrath, N., Lessells, R., Skingsley, A., Newell, M.-L., de Oliveira, T., Rawizza, H., Chaplin, B., Meloni, S., Okonkwo, P., Kanki, P., Gale, H., Gitterman, S., Gordin, F., Benator, D., Kan, V., Meya, D., Rajasingham, R., Rolfes, M., Birkenkamp, K., Boulware, D., Bulterys, P., Le, T., Quang, V.M., Nelson, K., Lloyd-Smith, J., Luetkemeyer, A.F., Rosenkranz, S.L., Lu, D., Lizak, P.S., Ive, P., Swindells, S., Benson, C.A., Grinsztejn, B., Sanne, I.M., Havlir, D.V., Aweeka, F., Sterling, T., Benson, C., Shang, N., Miro, J., Chaisson, R., Lucchetti, A., Sanchez, J., Scott, N., Villarino, E., McIlleron, H., Martinson, N., Denti, P., Mashabela, F., Hunt, J., Shembe, S., Hull, J., Haas, D.W., Msandiwa, R., Cohn, S., Dooley, K.E., Everitt, D., Winter, H., Egizi, E., Murray, S., Diacon, A., Dawson, R., Hutchings, J., Van Niekerk, C., Becker, P., Hafkin, J., Modongo, C., Newcomb, C., Lowenthal, E., MacGregor, R.R., Steenhoff, A., Friedman, H., Bisson, G., Fitzgerald, D., Jansen, P., Chipungu, C., Dindi, V., Fielder, J., Pfaff, C., Bygrave, H., Simons, S., Munyaradzi, D., Nyagadza, B., Metcalf, C., Ncube, K., Van Den Broucke, S., Mupfumi, L., Mason, P., Zinyowera, S., Mutetwa, R., Wallis, R.S., Diacon, A.H., Venter, A., Friedrich, S.O., Paige, D., Zhu, T., Silvia, A., Gobey, J., Ellery, C., Zhang, Y., Kadyszewski, E., Brust, J.C.M., Shah, N.S., van der Merwe, T.L., Bamber, S., Mngadi, A., Ning, Y., Heo, M., Moll, A.P., Loveday, M., Lalloo, U.G., Friedland, G.H., Gandhi, N.R., Hawkins, C., Christian, B., Ye, J., Nagu, T., Aris, E., Chalamilla, G., Spiegelman, D., Mugusi, F., Mehta, S., Fawzi, W., Lo Re, V., Tate, J., Kallan, M., Lim, J., Goetz, M., Klein, M., Rimland, D., Rodriguez-Barradas, M., Butt, A., Gibert, C., Brown, S., Kostman, J., Strom, B., Reddy, R., Justice, A., Localio, R., Amorosa, V., Umbleja, T., Johnson, V., Kang, M., Luetkemeyer, A., Bardin, M., Haas, D., Chung, R., Yesmin, S., Coughlin, K., Martinez, A., Adams, M.B., Alston-Smith, B., Tebas, P., Peters, M., Kahn, J., Xu, J., Kapogiannis, B., Rudy, B., Liu, N., Gonin, R., Wilson, C., Worrell, C., Squires, K., Kojic, E.M., Cespedes, M., Aberg, J., Allen, R., Grinsztein, B., Firnhaber, C., Webster-Cyriaque, J., Palefsky, J.M., Godfrey, C., Saah, A.J., Cu-Uvin, S., Rangaka, M.X., Boulle, A., Wilkinson, R.J., van Cutsem, G., Goemaere, E., Goliath, R., Titus, R., Mathee, S., Maartens, G., Shet, A., Holla, S., Raman, V., Dinakar, C., Ashok, M., Dufouil, C., Richert, L., Bruyand, M., Amieva, H., Dauchy, F.-A., Dartigues, J.-F., Neau, D., Dabis, F., Morlat, P., Bonnet, F., Chene, G., Nigo, M., Walker, A., Lucido, D., Shah, A., Skliut, M., Mildvan, D., Sahasrabuddhe, V., Castle, P., Follansbee, S., Borgonovo, S., LaMere, B., Tokugawa, D., Darragh, T., Boyle, S., Sadorra, M., Tang, S., Wentzensen, N., Mills, A., Podzamczer, D., Fätkenheuer, G., Leal, M., Than, S., Valluri, S.R., Craig, C., Vourvahis, M., Heera, J., Valdez, H., Brown, T., Rinehart, A., Portsmouth, S., Gallant, J., Koenig, E., Andrade-Villanueva, J., Chetchotisakd, P., Dejesus, E., Antunes, F., Arastéh, K., Moyle, G., Rizzardini, G., Fehr, J., Liu, Y.-P., Zhong, L., Callebaut, C., Ramanathan, S., Szwarcberg, J., Rhee, M., Cheng, A., Palella, F., Gazzard, B., Ruane, P., Shamblaw, D., Flamm, J., Fisher, M., van Lunzen, J., Ebrahimi, R., White, K., Guyer, B., Graham, H., Fralich, T., Elion, R., Molina, J.-M., Arribas-Lopez, J.-R., Cooper, D., Maggiolo, F., Wilkins, E., Conway, B., Margot, N., Raffi, F., Rachlis, A., Stellbrink, H.-J., Hardy, W.D., Torti, C., Orkin, C., Bloch, M., Pokrovsky, V., Almond, S., Margolis, D., Min, S., Karasi, J.-C., Musonera, F., Iranyumviye, K., Servais, J.-Y., Devaux, C., Binagwaho, A., Arendt, V., Shafer, R., Zolopa, A., Schmit, J.-C., Rimsky, L., Van Eygen, V., Vingerhoets, J., Thys, K., Aerssens, J., Stevens, M., Picchio, G., van Zyl, G., Claassen, M., Engelbrecht, S., Preiser, W., Wood, N., Travers, S., Charpentier, C., Landman, R., Laouénan, C., Joly, V., Hamet, G., Damond, F., Brun-Vézinet, F., Mentré, F., Descamps, D., Yeni, P., De Castro, N., Arnold, V., Veloso, V., Morgado, M., Pilotto, J.H., Brites, C., Madruga, J.V., Barcellos, N., Riegel Santos, B., Vorsatz, C., Grondin, C., Santini-Oliveira, M., Patey, O., Delaugerre, C., Chêne, G., Venuto, C., Mollan, K., Ma, Q., Daar, E., Sax, P., Fischl, M., Collier, A., Smith, K., Tierney, C., Morse, G., Acosta, E., Vardhanabhuti, S., Ribaudo, H., Severe, P., Lalloo, U., Kumarasamy, N., Taulo, F., Kabanda, J., Oneko, O., Sambarey, P., Chan, E., Hitti, J., McMahon, D., Gandhi, M., Greenblatt, R., Bacchetti, P., Jin, C., Cohen, M., Dehovitz, J., Anastos, K., Gange, S., Liu, C., Hanson, S., Aouizerat, B., Gervasoni, C., Baldelli, S., Cerea, M., Meraviglia, P., Landonio, S., Simioni, M., Gazzaniga, A., Galli, M., Clementi, E., Cattaneo, D., Hosseinipour, M., Eron, J., Chen, Y.Q., Ou, S.-S., Anderson, M., McCauley, M., Gamble, T., Hakim, J., Kumwenda, J., Pilotto, J., Godbole, S., Chariyalertsak, S., Santos, B., Mayer, K., Eshleman, S., Piwowar-Manning, E., Cottle, L., Makhema, J., Panchia, R., Sanne, I., Elharrar, V., Havlir, D., Cohen, M.S., Kanki, P.J., Chang, C., Jolayemi, T., Banigbe-Aluko, B., Rewari, B.B., Shaukat, M., Kabra, S., Srikantiah, P., Lundgren, J., Colombero, C., Rocco, C., Mecikovsky, D., Bologna, R., Aulicino, P., Sen, L., Mangano, A., Nielsen-Saines, K., Mirochnick, M., Kumwenda, N., Joao, E.C., Kreitchmann, R., Pinto, J., Parsons, T., Richardson, P., Taha, T., Mofenson, L., Sato, P., Kearney, B., Fowler, M.G., Hazra, R., Viani, R., Zheng, N., Alvero, C., O'Gara, E., Petzold, E., Heckman, B., Steimers, D., Song, I., Piscitelli, S., Wiznia, A., Cotton, M., Cassim, H., Pavía-Ruz, N., Ross, L., Ford, S., Givens, N., Cheng, K., Sievers, J., Tudor-Williams, G., Cahn, P., Chokephaibulkit, K., Fourie, J., Karatzios, C., Dincq, S., Kakuda, T.N., Nijs, S., Tambuyzer, L., Tomaka, F., Nachman, S., Teppler, H., Homony, B., Xu, X., Handelsman, E., Graham, B., Toye, M., Miruka, A., Achieng, R., Aoko, A., Tarus, J., Sigei, C., Yegon, P., Maswai, J., Sawe, F., Shaffer, D., Crawford, K., Kanjanavanit, S., Puthanakit, T., Kosalaraksa, P., Hansudewechakul, R., Ngampiyaskul, C., Pinyakorn, S., Luesomboon, W., Vonthanak, S., Ananworanich, J., Ruxrungtham, K., Miller, T.L., Wang, J., Jacobson, D.L., Takemoto, J.K., Sharma, T., Geffner, M.E., Libutti, D.E., Siminski, S., Dooley, L., Somarriba, G., Graham, P., Gerschenson, M., van Ramshorst, M., Struthers, H., McIntyre, J.A., Peters, R.P.H., Himes, S., Scheidweiler, K., Tassiopoulos, K., Kacanek, D., Rich, K., Huestis, M., O'Brien, M., Nardi, M.A., Montenont, E., Valdes, V., Hu, L., Merolla, M., Gettenberg, G., Bhardwaj, N., Berger, J.S., Kelesidis, T., Kendall, M., Yang, O., Currier, J., McComsey, G.A., Kitch, D., Sax, P.E., Jahed, N.C., Melbourne, K., Ha, B., Brown, T.T., Bloom, A., Fedarko, N., Daar, E.S., Schouten, J., Wit, F.W., Stolte, I.G., van der Valk, M., Geerlings, S.E., de Wolf, F., Prins, M., Reiss, P., Sypek, A., Morris, B., Losina, E., Paltiel, A.D., Seage, G., Walensky, R., Weinstein, M., and Freedberg, K.
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AIDS2012 Abstract Supplement ,B48 - Endocrine and metabolic issues (e.g., diabetes, hyperlipidemia) ,B8 - Viral load testing, including point of care diagnostics ,B39 - Pharmacokinetics, pharmacodynamics, pharmacogenomics, therapeutic drug monitoring, formulations, drug interactions in children and adolescents ,B12 - Opportunistic infections (excluding tuberculosis) ,B32 - First line therapy ,B42 - Complications of HIV therapy in children and adolescents ,B45 - Cardiovascular disease ,B57 - Eradication / reservoir depletion ,B19 - HIV-associated neurocognitive disorders (HAND) and other neurologic disorders ,B41 - Adherence in children and adolescents ,B40 - Clinical trials and antiretroviral therapy in children and adolescents ,B29 - Pharmacology, pharmacokinetics and pharmacogenomics, role of therapeutic drug monitoring, drug interactions ,B13 - Tuberculosis (TB) ,B15 - Hepatitis B and D, including treatment ,B18 - Prophylaxis of HIV associated infections ,vaccines e.g. pneumococcal, hepatitis and HPV, co-trimoxazole prophylaxis and Isoniazid Preventive Therapy (IPT) ,B16 - Hepatitis C, including treatment ,B25 - Cohort studies ,B3 - Elite and viremic controllers ,B53 - Ageing in persons with HIV ,B35 - Management of late presenters ,B28 - Antiretroviral drug resistance ,B2 - Acute and early infection ,B24 - Clinical trials - phase III/post-licensing ,B23 - Clinical trials - phase I/II ,Public Health, Environmental and Occupational Health ,B1 - Impact of co-factors: viral clade, tropism, genetic factors, age and gender on disease progression ,B5 - Disease burden - morbidity/mortality ,B11 - CD4 testing, including point of care diagnostics ,B7 - HIV testing, including new algorithms and strategies ,B33 - Second line therapy ,B9 - Drug resistance testing ,vaccines e.g., pneumococcal, hepatitis and HPV, co-trimoxazole prophylaxis and Isoniazid Preventive Therapy (IPT) ,Infectious Diseases ,B22 - AIDS-related Kaposi's sarcoma (KS), lymphoma, cervical and anal carcinoma including Human Herpes Virus 8 infection (HHV8) ,B31 - When to start therapy? ,B51 - Immune activation and inflammatory state - Abstract
Background Toll-like receptors (TLRs) are transmembrane receptors that activate cells of the innate immune systems upon recognition of pathogen-associated molecular patterns. The TLR4 is an essential component of the innate immune response to various microorganisms. We investigated the impact of TLR4 polymorphism on development of opportunistic diseases in HIV-infected patients. Methods The presence of TLR4 Asp299Gly single nucleotide polymorphisms (SNPs) was determined in a cohort of 180 antiretroviral treatment-naive HIV-1 infected patients and evaluated in relation to the occurrence of opportunistic infections. TLR4 genotyping was performed by real-time PCR. Results One hundred sixty-five patients were homozygous for the wild-type genotype (AA); 15 patients (8,3%) were heterozygous for the Asp299Gly SNP (AG). TLR4 polymorphism was associated with more frequent development of the opportunistic infections, such as active tuberculosis (OR=3.27; 95% CI [1.21–10.29]), herpes zoster (OR=4.15; 95% CI [1.24–7.29]) and toxoplasmosis (OR=6.23; 95% CI [1.19–18.67]) compared with genotype AA. In addition, TLR4 SNP was associated with development of opportunistic diseases among individuals with CD4 cell count of>100 cells/mm3, compared with homozygous HIV-infected patients (OR, 5.25; 95%, CI [2.28–10.47]). Conclusion This study suggests a greater risk of developing of active tuberculosis and other opportunistic infections in patients with the Asp299Gly TLR4 polymorphism., Background Diagnosis of acute HIV infection (AHI) is uncommon in resource limited settings. This abstract describes acute HIV infection in women in three East African countries. Methods Women at high risk of infection were recruited from ‘hot spots’ in Kericho (rural Kenya), Kampala (urban Uganda) and Mbeya (rural Tanzania). HIV negative eligible women were prospectively screened twice a week using HIV nucleic acid testing. A positive test led to entry into an intensive one-month diagnostic verification phase to definitively establish HIV infection status. Clinical and laboratory assessments were performed semiweekly. Supportive care and symptomatic treatment was provided. Results Overall, 1197 high-risk volunteers have enrolled to date with 37 cases of AHI identified (31 prior to detectable antibodies). Mean age at HIV acquisition was 24.4 years (range 18–34). Only six reported unprotected sex with a known HIV positive partner. Crude incidence was 2.77/100 PY (95% CI:±0.87). Of the 37 AHI cases; 14 presented with malaria-like symptoms (all smear negative), 7 flu-like symptoms while 16 had 1–2 mild complaints (8) or no symptoms (8). Overall, AHI cases were evaluated at 302 visits and at least one symptom was reported in only 75 visits (24.8%). Pregnancy did not increase the frequency of symptoms but dehydration due to vomiting resulted in 2 of the 3 hospitalizations observed. Conclusion Identification of AHI is feasible in East Africa. Young, rural, females are most vulnerable. Individuals with clinical syndromes suggestive of malaria, but excluded by microscopy, should raise index of suspicion for AHI. The majority of cases had few or no symptoms or brief non-specific symptoms not requiring medical intervention. Screening protocols based on malaria syndromic presentation would not identify the majority of AHI cases., Background The use of combination antiretroviral therapy (cART) has resulted in dramatic reductions in HIV-related mortality and morbidity. Nevertheless, despite sustained suppression of viral replication there remains evidence of increased levels of immune activation, particularly in patients initiating treatment during late-stage infection. We asked whether early initiation of therapy could potentially ameliorate this apparent limitation of cART. Methods 40 subjects identified as acutely or early HIV-1 infected were treated with either 3-drug cART (N=14) which included TDF/FTC, a ritonavir-boosted protease inhibitor (atazanavir or darunavir) or 5-drugs (N=26) cART as above with raltegravir and maraviroc. CD38 and HLA-DR expression on CD8+ T cells were determined by flow cytometry at baseline and weeks 48 and 96. Levels of sCD14 by ELISA were measured at weeks 48 and 96. These results were compared to values in 13 healthy, HIV-1 uninfected volunteers. Results A total of 29 subjects, 11 on 3-drugs and 18 on 5-drugs remained on therapy, suppressed and were available for analysis at 48 weeks. After 96-weeks 25 subjects, 9 on 3-drugs and 16 on 5-drugs were similarly analyzed. There are no statistically significant differences (Mann-Whitney, p, Background HIV controllers, maintaining low plasma HIV RNA levels (, Background HIV+ individuals in care with access to ART may experience a wider range of non-AIDS-related complications than previously. It is important to accurately classify causes of death, and monitor trends over time. Ratio ratio (95% CI) for underlying cause of death over calender time (reference=1999/2000)2001/20022003/20042005/20062007/20082009–2011 Total deaths Unadjusted0.98 (0.85–1.12)0.91 (0.79–1.04)0.69 (0.60–0.80)0.58 (0.50–0.67)0.48 (0.41–0.55)Adjusteda 1.06 (0.92–1.23)1.03 (0.89–1.18)0.80 (0.69–0.93)0.71 (0.61–0.83)0.66 (0.56–0.77) AIDS Unadjusted0.91 (0.71–1.16)0.88 (0.69–1.12)0.56 (0.43–0.72)0.44 (0.34–0.57)0.31 (0.24–0.42)Adjusteda 1.11 (0.87–1.43)1.20 (0.94–1.54)0.86 (0.66–1.11)0.82 (0.62–1.07)0.85 (0.64–1.13) Liver-related Unadjusted0.96 (0.67–1.37)0.71 (0.50–1.03)0.63 (0.43–0.90)0.46 (0.32–0.68)0.28 (0.18–0.42)Adjusteda 1.02 (0.70–1.47)0.80 (0.55–1.17)0.73 (0.49–1.07)0.59 (0.39–0.88)0.39 (0.25–0.61) Non-AIDS malignancyb Unadjusted1.18 (0.74–1.89)1.34 (0.84–2.11)1.16 (0.73–1.84)1.16 (0.73–1.83)1.09 (0.69–1.72)Adjusted1.10 (0.68–1.78)1.19 (0.75–1.90)0.95 (0.59–1.52)0.91 (0.57–1.46)0.83 (0.52–1.35) CVD-related Unadjusted1.07 (0.69–1.66)0.97 (0.63–1.51)0.77 (0.50–1.20)0.69 (0.44–1.07)0.46 (0.29–0.74)Adjusteda 0.99 (0.64–1.55)0.84 (0.54–1.32)0.62 (0.39–0.98)0.51 (0.32–0.82)0.31 (0.19–0.51) Other/Unknownc Unadjusted0.97 (0.76–1.25)0.90 (0.70–1.15)0.71 (0.55–0.92)0.59 (0.45–0.76)0.59 (0.45–0.76)Adjusteda 1.05 (0.82–1.36)1.00 (0.77–1.29)0.82 (0.63–1.07)0.71 (0.55–0.93)0.75 (0.57–0.99)Results from Poisson Regression Model.aAdjusted for (fixed) gender, age, ethnicity, riskgroup, HBV status, HCV status, smoking, diabetes, hypertension, (time-updated) viral load, BMI and CD4 count.bIncludes lung, prostate, anal, primary liver, GI, breast, uterus, testicular and bladder cancers, leukemias and Hodgkin's lymphomas.cAlt deaths that do not meet criteria for other categories. Methods Individuals from a large prospective cohort collaboration (D:A:D) were followed starting from 1999 until death, loss-to-follow-up or February 2011, whichever came first. Underlying causes of death were attributed based on the Coding of causes of Death (CoDe) system. Results 3,802 deaths occurred in 49,734 individuals followed for 304,695 person-years (rate=12.5/1000 person-years [95% CI 12.1–12.9]). Leading underlying causes were: AIDS-related (29%), non-AIDS-defining malignancies (NADM; 14%), liver disease (LD; 13%), cardiovascular disease (CVD; 11%), invasive bacterial infection (7%), drug overdose (3%), accidents (2%), renal disease (1%) and unknown (7%). Decreases over time occurred in rates of all-cause (17.4/1000 person-years in 1999–2000 to 8.3 in 2009–2011), AIDS-related (5.9−1.9), LD (2.7−0.8) and CVD-related (1.8−0.8) mortality. However, the rate of NADM deaths remained stable (1.5−1.6). After accounting for factors including current CD4 count (Table), there was still evidence of decreases over time in LD and CVD deaths, but not AIDS-related. The proportion of all deaths attributed to AIDS (34% in 1999–2000 to 22% in 2009–2011), NADM (9%–20%) and LD (16%–9%) changed over time. Conclusion Underlying causes of death have changed markedly over the last 12 years. AIDS remains the leading cause. Although there have been marked reductions over time in AIDS-related deaths, this effect is removed when accounting for current CD4 and other factors. NADMs are now the leading non-AIDS cause. Rates of LD and CVD-related deaths have decreased substantially, even after accounting for the factors listed below, suggesting other improvements in patient management during the study period. No trends in emerging causes of unexpected deaths were observed. Collection of specific causes of deaths is important to allow earlier interventions in HIV case management., Background US CDC guidelines recommend at least annual HIV testing for those at high risk. Nonadherence to testing guidelines and late diagnosis of infection may contribute to HIV transmission. Methods HPTN 061 is a feasibility study of a multi-component HIV prevention intervention for at-risk black MSM in 6 US cities. At enrollment, participants were offered HIV testing. Participants reporting past HIV-uninfected or unknown status at enrollment and no HIV testing within the prior 12 months were considered nonadherent to HIV testing guidelines. Participants with newly diagnosed HIV and CD4, Background Recent data showing a high incidence of HIV infection among men who have sex with men (MSM) who had been tested during the past year suggest that MSM might benefit from more frequent HIV screening (e.g., every 3 to 6 months). We assessed the cost-effectiveness of HIV screening at 3 and 6 month intervals compared with annual screening. Methods We used a published mathematical model of HIV transmission to evaluate screening intervals for a cohort of 10,000 MSM ages 14–64. We incorporated HIV transmissions averted due to serostatus awareness for each screening interval (e.g. 3, 6, 12 months), as well as HIV testing costs and treatment costs for averted transmissions. We assumed an HIV incidence of 1.27% for MSM and conducted threshold analyses on incidence. We assumed conventional testing with a 3rd generation antibody test and 75% receipt of results. In sensitivity analyses, we investigated the impact of all rapid testing and 100% receipt of results. We valued each HIV transmission averted using lifetime treatment costs of $367,134. Results Compared to annual screening, conventional HIV testing every 3 months and 6 months averted 2.04 and 1.36 HIV transmissions, respectively, and both were cost-saving. The incremental cost-effectiveness of 3-month versus 6-month screening also was cost-saving. Threshold values for HIV incidence at which screening was cost-saving were 0.3% and 0.5% at the 3-month and 6-month screening intervals, respectively. Screening with a rapid test was cost-saving at both 3- and 6-month intervals compared to annual screening. The incremental cost-effectiveness of 3-month versus 6-month screening was $813 per QALY saved. Every 6 months compared to annually Every 3 months compared to annually Every 3 months compared to every 6 months HIV Screening Costs$97,340$284,574$187,233HIV Transmissions Averted1.362.040.68QALYs Saved8.7613.144.38HIV Treatment Costs Saved$500,149$750,223$250,074Incremental Cost-effectiveness RatioCost-savingCost-savingCost-savingCost-effectiveness of HIV Screening for MSM. Conclusion HIV screening with either conventional or rapid testing as frequently as every 3 months is cost-saving or very cost-effective. Reexamination of HIV screening intervals for MSM should be considered on the basis of the economic evidence., Background Pooling techniques have been advanced to improve the cost effectiveness of nucleic acid testing for diagnosis of serologically undetectable acute HIV infections in resource limited settings. Previously reported methods have relied on serum samples. The goal of this study is to develop and apply a novel dried blood spot (DBS) based RT-PCR pooling technique to facilitate household sample collection, efficient diagnosis, and treatment-as-prevention strategies in Mochudi, Botswana. Methods Laboratory-prepared DBS samples with plasma viral load >50,000 copies/mL are diluted with HIV negative DBS samples to generate estimates of sensitivity for pool sizes of 5, 10, 25, 50, and 100 samples. RT-PCR is performed using the Abbott RealTime HIV-1 assay. This analysis will inform the development of an acute HIV case detection pooling algorithm to be applied to all seronegative samples collected as part of a large prevention study cohort.Table 1Sensitivities of DBS pooled RT-PCR Mean copies per mL (95% CI) Pool size % Sensitivity 38680.96 (28170.00, 49191.91)510019965.30 (15020.37, 24910.23)1094.18735.91 (6800.21, 10671.61)2571.44992.78 (3579.63, 6405.93)5070.63121.21 (1676, 4566.20)10027.8 Results Preliminary findings based on 9 HIV positive samples used to create 90 pools, reflected sensitivities ranging from 27.8% for pools at 1/100 dilution to 100% for 1/5. We were able to detect the presence of an HIV positive sample in pools of 10 with a sensitivity of 94.1%. The difference in sensitivity between pool sizes of 25 and 50 was minimal. Conclusion We have demonstrated the feasibility of using DBS pooling for acute HIV diagnosis. Because acute HIV infection involves high viral loads, we can reasonably expect to detect acute cases >50,000 copies/mL in pools of 10 with 94.1% sensitivity. Although increasing pool size decreases sensitivities, the false negative rate during the acute window period could be significantly reduced even with the use of larger pools. Because secondary HIV transmission in acute and recent HIV infection may contribute significantly to the epidemic in Botswana, the potential for a treatment-as-prevention strategy would be facilitated by screening methods to detect acute HIV cases., Background In Kenya, HIV-1 viral load (VL) monitoring is commonly performed with the COBAS Amplicor using plasma specimens, but interest is growing in transitioning to real-time PCR (RT-PCR), including the COBAS Ampliprep/COBAS Taqman (CAP/CTM), using dried blood spots (DBS). RT-PCR has several advantages including full automation, lower detection limit, and broader measuring range. Benefits with DBS include sample collection via finger or heel stick, low biohazard risk, and specimen transportation under ambient conditions. Prior to implementation, a direct evaluation of the two assays using DBS field specimens is required. Methods This analysis compares sensitivity, specificity, negative (NPV) and positive (PPV) predictive values, concordance correlation, and agreement, as evaluated with Bland Altman analyses, between HIV-1 VL measurements using paired plasma and DBS specimens obtained from 512 HIV-1 infected treatment-naive pregnant women enrolled in the Kisumu Breastfeeding Study, and tested with the COBAS Amplicor and CAP/CTM assays. Results The sensitivity and NPV of VL detection in DBS specimens were higher with CAP/CTM (sensitivity: 100%, 95% CI: 99.1–100.0; NPV: 100%, 95% CI: 59.0–100.0) than COBAS Amplicor (sensitivity: 96.6%, 95% CI: 94.3–98.1; NPV: 58.8%, 95% CI: 40.7–75.4), with comparable PPV; 99.5%, 95% CI: 98.3–99.9 and 99.6%, 95% CI: 98.6–100.0 for the respective assays. The specificity of VL detection in DBS specimens was lower with CAP/CTM (77.8%, 95% CI: 40.0–97.2) than COBAS Amplicor (95.2%, 95% CI: 76.2–99.9). Good concordance and agreement were observed when testing paired plasma and DBS specimens (Figures 1 and 2).Figure 1 Concordance correlation analyses of HIV-1 viral load quantification among plasma and DBS specimens collected from patients enrolled in Kisumu Breastfeeding Study and tested with COBAS Amplicor and CAP/CTM. COBAS Amplicor plasma viral loads were used as reference group for comparison: a)vs. COBAS Amplicor DBS viral loads; b) vs. CAP/CTM plasma viral loads; c) vs. CAP/CTM DBS viral loads [Correlation plots]. Figure 2 Bland-Altman analyses to evaluate agreement in HIV-1 viral load quantification among plasma and DBS specimens collected from patients enrolled in Kisumu Breastfeeding Study and tested with COBAS Amplicor and CAP/CTM. COBAS Amplicor plasma viral loads were used as reference group for comparison. The difference between the reference and the comparision assay/specimen type were plotted against the average of the reference group and the comparision assay/specimen type o; a)COBAS Amplicor DBS viral loads; b) CAP/CTM plasma viral loads; c) CAP/CTM DBS viral loads [Bland-Altman plots]. Conclusion There was good correlation between DBS and plasma viral loads as well as between COBAS Amplicor and CAP/CTM. However, CAP/CTM had a better sensitivity compared to COBAS Amplicor. Our findings show that DBS may be an alternative sample type to plasma for viral load measurement, which could increase access to viral load monitoring in resource limited settings. Disclaimer The content and views in this abstract are solely the responsibility of the authors and do not necessarily represent the official views of the affiliated organizations, United States Government, or Government of Kenya., Background Routine viral load (VL) testing is not available or recommended for patients on HAART in India. The implications of not having routine VL testing are not known in this setting. Methods As part of a longitudinal adherence study, participants on first-line HAART in Bangalore, India were monitored every six months, for 24 months, with CD4 cell count, HIV VL, and genotype, if VL>1000copies/ml. Participants with virologic failure (VF) often continued on first line therapy due to local resource constraints. We compared the incidence of WHO-defined criteria for immunologic failure (IF) to VF, defined as two consecutive VL >1000 copies/ml or VL>10,000 copies/ml for those who had only one VL available. Results Five hundred nine participants were included in the study (63% male, median age 36, median duration on HAART at start of study 14 months). Forty (7.8%) experienced VF, 25 (6.1%) IF and 10 (2.0%) both VF and IF. The sensitivity of immunologic criteria to detect VF was 20%, specificity 95% and positive-predictive value 29%. Of the 40 participants with VF only, 18 developed new thymidine analogue mutations over the follow-up period during which they continued on first line therapy; 11 of 18 developed high- level NRTI resistance, which would preclude subsequent tenofovir use. In addition, six participants developed NNRTI mutations, which confer genotypic resistance to etravirine and rilpivirine. Conclusion WHO IF criteria have low sensitivity for detecting VF and presence of IF poorly predicts VF. Relying on CD4 count data alone would lead a substantial number of unnecessary switches to second-line therapy. A notable proportion of patients would be continued on first line therapy that they are already failing, jeopardizing future HAART options. Universal access to VL monitoring would avoid costly switches to second line therapy and preserve future therapeutic options., Background Rapid scale-up of antiretroviral therapy (ART) in Southern Africa has put enormous strain on health systems. Information about acquired drug resistance in treated individuals is important to monitor quality of programmes and to ensure that ART policies remain appropriate. The majority of resistance data so far have come from urban, hospital-based programmes; limited data have been reported from rural treatment programmes. Methods Adult (≥16 years) HIV-infected individuals with virological failure (2×VL>1000 copies/ml) on first-line NNRTI-based ART were enrolled from all 17 primary health care clinics of the Hlabisa ART Programme. Genotypic resistance testing was performed using the in-house SATuRN/Life Technologies system. Sequences were analysed and genotypic susceptibility scores (GSS) were calculated using RegaDB and Stanford HIVDB 6.0.5 algorithms. Results 187 adults enrolled between Dec 2010 and Dec 2011; median age 37 years (IQR 31–45); 70% female. Median time on ART 41 months (IQR 31–53); median time on failing regimen 30 months (IQR 20–42). 120 (64%) had never achieved full virological suppression (VL≤50 copies/ml). 160 (86%) individuals had ≥1 drug resistance mutation; 149 (80%) and 153 (82%) respectively had NRTI and NNRTI mutations. 72 (38%) had at least one thymidine analogue mutation (TAM) and 32 (17%) had ≥3 TAMs. 14 (7%) had other NRTI mutations that might impact on second-line therapy (K65R-12 (6%); Q151M-3 (2%)). The standard second-line regimen was substantially compromised (defined as GSS≤1.5) in 33 (18%) individuals. Conclusion There are high levels of acquired drug resistance associated with prolonged virological failure in this rural primary health care programme. Standard second-line regimens would be significantly compromised in almost one in five adults. This suggests a role for genotypic resistance testing in routine care but, more importantly, it highlights the need for increased attention to quality of care and adherence to virological monitoring guidelines., Background In assessing the cost-effectiveness of CD4 versus viral load (VL) monitoring strategies, the “resistance cost” associated with delays in identifying non-suppression must be considered, and would likely favor a VL strategy. Here we examined the extent of protease (PR) mutation accumulation according to duration of 2nd-line (2L) failure. Methods Since 2004, the Harvard PEPFAR/APIN Program has provided ART to over 85,000 people in Nigeria. Approximately 8% of patients have received protease inhibitor (PI)-based 2L therapy (mostly LPV/r). A subset of patients with VL failure, defined as 2 consecutive VLs >1000cpm after ≥6 months on 2L, underwent genotypic resistance testing. Accumulation of PR mutations according to time on failing regimen was determined. Results Of 6714 patients who received PI-based ART, 661 (9.8%) met virologic failure criteria. Genotypes were performed on 53 samples (median CD4 183; VL 30150 at 2L failure). Time on Failing 2nd-line Regimen Characteristic 0–12 months (n=15) 13–24 months (n=27) >24 months (n=11) Total (n=53) Age (years), median (IQR)43 (34–47)40 (34–43)42 (32–51)42 (33–46)% Female33%48%55%45%# ARVs previously used, median (range)6 (4–7)6 (4–8)6 (5–9)6 (4–9)Duration on 1L (months), median (IQR)23 (19–37)28 (16–37)16 (14–23)24 (15–35)Duration on 2L (months)12 (8–20)20 (18–22)36 (34–50)20 (16–34)Time Failing 2L Regimen (months)8 (6–11)18 (16–20)34 (32–40)17 (12–22)2L Adherence (%), median (IQR)89 (79–98)96 (87–100)91 (78–100)92 (84–100)Characteristics of Patients Failing 2L ART. Patients on non-suppressive 2L therapy for ≤12 months prior to genotype testing had a median of 3 (IQR, 1–5) International AIDS Society (IAS) PR mutations, compared with 6 (IQR, 0–6.5) among patients failing for >24 months. Patients developed a median of 1.1 (IQR, 0–2.3) IAS PR mutations per 6 months on failing 2L therapy. In 30% of failing patients no PR mutations were present, suggesting non-adherence; when these patients were excluded, the median number of IAS PR mutations/6 months increased to 1.8 (IQR, 1.1–2.8). For patients failing >24 months, high- or intermediate-level resistance to LPV/r and ATV/r was present in 64%, with 9% to DRV/r. Time on Failing 2L Regimen Protease Resistance 0–12 months (n=15) 13–24 months (n=27) >24 months (n=11) Total (n=53) Total # PR mutations, median (IQR)3 (1–5)2 (0–5)6 (0–6.5)3 (0–5)Major PR mutations0 (0–1.5)0 (0–3)3 (0–4)1 (0–3)Minor PR mutations2 (0.5–3.5)2 (0–2)2 (0–3)2 (0–2)High- or Intermediate-level PI Resistance, # (%)Lopinavir (LPV/r) and Atazanavir (ATV/r)4 (27%)12 (44%)7 (64%)23 (43%)Darunavir (DRV/r)0 (0%)4 (15%)1 (9%)5 (9%)# PR mutations/6 mo. on Failing 2L, median (IQR)2.7 (0.5–3.7)0.9 (0–1.8)0.8 (0–1.1)1.1 (0–2.3)# PR mutations/6 mo. on Failing 2L (No PR mutations excluded)3.4 (2.6–4)1.4 (0.8–2.3)1.1 (0.9–1.2)1.8 (1.1–2.8)Protease Mutation Accumulation by Time Failing. Conclusion This is the first report assessing the impact of duration of non-suppressive 2L therapy on the accumulation of PR resistance in a resource-limited setting. This information provides insight into the “resistance cost” associated with failing to switch non-suppressive 2L regimens, and highlights the issue of 3rd-line access., Background In the USA, CD4 cell counts and HIV-1 viral load (VL) have been tested concomitantly 2–4 times/year for persons receiving antiretroviral therapy (ART). With the advancement of effective HIV care, many individuals now have viral suppression and higher CD4 cell counts. After therapy is initiated, the CD4 cell count is used to monitor the need for prophylaxis against opportunistic infections and immunologic response to ART. We assessed whether CD4 cell counts may be performed less frequently after viral suppression of, Background Cryptococcal meningitis (CM) is a leading cause of death in AIDS patients in sub-Saharan Africa. Cryptococcal antigen (CRAG) can be detected weeks before symptom onset, and those who are asymptomatic but CRAG+ have a high risk of subsequent CM and mortality. A new CRAG point-of-care immunochromatographic lateral flow assay (LFA) is available that is remarkably easy to administer without laboratory infrastructure or expertise and has excellent sensitivity and specificity. Methods We assessed the cost-benefit of targeted CRAG screening for patients with CD4, Background Penicillium marneffei is an emerging dimorphic mycosis endemic in South and Southeast Asia, and a leading cause of mortality among HIV-infected people in the region. Factors governing the seasonal incidence of P. marneffei infection have yet to be identified, and may yield critical insights into possible reservoirs or modes of transmission. We used P. marneffei incidence data from Ho Chi Minh City (HCMC), Vietnam from 2004–2010, as well as high-resolution weather data, to identify climactic factors that could account for the observed seasonality of P. marneffei infection. Methods This study included all P. marneffei, Cryptococcus neoformans, and HIV-related admissions to the Hospital for Tropical Disease (HTD) in HCMC from 2004–2010, as well as temperature, humidity, wind, and precipitation data for the corresponding period. We used logistic regression modeling to identify factors significantly associated with P. marneffei and C. neoformans admissions. We also estimated the P. marneffei incubation period by incorporating different exposure-to-admission delays in our models. Results This analysis included 719 HIV-infected patients presenting with penicilliosis. P. marneffei admissions were closely associated with humidity (P, Background RIF upregulates CYP 450 isoenzymes and can lower EFV exposure, particularly if weight ≥50 kg, However, clinical data have not shown reduced HIV virologic suppression with 600 mg EFV+RIF. We conducted a nested PK study to evaluate EFV concentrations and virologic suppression in A5221 patients on EFV(600 mg) and RIF-based TB treatment. Table 1 Weight (kg) 4) compared to Whites(22.9% vs 3.9%;p=0.002). Conclusion Overall, RIFcoadministration was not associated with lower EFV trough concentrations; patients weighing ≥50 or ≥60 kg had lower EFV Cmin, but there was no association with subtherapeutic Cmin nor virologic suppression. These data from a multinational, predominantly non-White population do not support guidelines for weight-based dosing of EFV with RIF., Background HIV is the strongest risk factor for progressing from latent M. tuberculosis infection to tuberculosis (TB). 9 months of daily self-administered INH (9H) is efficacious but has low completion rates and may cause hepatotoxicity. PREVENT TB demonstrated that 3 months of once-weekly rifapentine 900 mg+INH 900 mg under direct observation (3HP) was at least as effective as 9H, but only 3% of the participants were HIV+, so enrollment of HIV+ persons was extended to adequately assess tolerability. Methods HIV+ persons ≥2 years old who were either tuberculin skin test positive or close contacts of TB cases were randomized to 3HP or 9H. Persons could not receive antiretroviral therapy (ART) for 90 days after enrollment. Participants were enrolled from the U.S., Brazil, Spain, Peru, and Canada between June 2001 and December 2010. Follow-up for TB continues through 2013. Results Of 4,128 participants enrolled with known HIV status and who received ≥1 dose of study therapy, 393 were HIV +: 207 in the 3HP and 186 in the 9H arm. In the MITT analysis (enrolled participants who were eligible), 178/201 (89%) HIV+ persons completed 3HP vs. 125/193 (65%) on 9H (P< 0.001). The proportion of participants with a serious adverse event (SAE), ≥1 AE, or hepatotoxicity was lower in 3HP than 9H (4 vs. 11%; P=0.006; 22 vs. 40%; P=0.004; 2 vs. 6%; P=0.03). Compared to 1,888 HIV-negative participants treated with 3HP, HIV+ persons were less likely to permanently discontinue treatment for any reason (11 vs. 20%; P, Background HIV and TB are threats to pregnant women and infants. Treatment with rifampin can reduce ART concentrations and increase risk of treatment failure and vertical transmission. We describe the pharmacokinetics (PK) and pharmacodynamics of EFV among pregnant HIV-infected women. Methods Prospective cohort of HIV-infected pregnant women with and without TB in Soweto. Women taking ART with EFV 600 mg had PK sampling at 37 weeks’ gestation or at delivery and then six weeks post-partum. EFV concentrations were measured in cord blood at delivery and in infants at 7 days. Post-hoc Bayesian estimates of PK parameters from nonlinear mixed-effects modeling with allometric scaling are reported. Results Among 41 HIV-infected pregnant women taking EFV ART, 19 received rifampin (TB/HIV) and 22 ART alone. Median age and weight were 29 years and 70 kg. For 35 women with pre-/peripartum EFV PK, median (IQR) estimated EFV trough (Cmin) was 1.31 (0.84, 1.86)mg/L, apparent oral clearance (CL/F) 13.62 (10.67, 18.44)L/h, and volume of distribution (Vd/F) 516 (440, 591)L. 31% had Cmin20 copies/mL (one had TB/HIV). Median cord blood EFV concentration was 1.09 (0.46, 2.38)mg/L. EFV concentrations were BLQ in 6/24 cord blood and 25/30 infant 7-day samples; both correlated with maternal concentrations. 0/35 infants were HIV-infected at 6 weeks. In mothers 6 weeks postpartum, median EFV Cmin was 1.75mg/L, CL/F 10.79L/h, and Vd/F 433L; 30% had Cmin, Background TMC207 (bedaquiline) (B) is a diarylquinoline in Phase 2 development to treat drug-sensitive and drug-resistant tuberculosis. It is being evaluated in novel combination regimens with an aim to minimize adverse interactions with antiretroviral therapy (ART). This study investigated the effect of enzyme inducers rifapentine (P) or rifampicin (R) on TMC207 pharmacokinetics.Geometric LS Means of Bedaquiline Confidence IntervalsTreatment GroupParameterWith InducerAloneMean Ratio90% ConfidenceRifapentine Group 1Cmax 2077333962.2(53.4, 72.5)AUC(0–1) 276126453142.3(37.8, 48.5)Rifampicin Group 2Cmax 2240371860.2(52.0, 69.8)AUC(0–1) 253146120941.4(37.7, 45.4)Results Table. Methods This was a 2-period, single-sequence drug interaction study performed in 2 groups of healthy subjects. Period 1 examined the PK of B and its M2 metabolite after a single 400 mg dose of B. Period 2 examined the effects of repeated doses of either P or R on the PK of B and M2. Subjects took P 600 mg (Group 1) or R 600 mg (Group 2) q.d. for 22 days. A single 400 mg dose of B was administered on Study Day 10 of period 2 followed by PK sampling for 14 days. Results 32 subjects were enrolled and 29 completed; B, alone, and in combination with P or R, was generally well tolerated. P and R both reduced the Cmax and AUC of B greater than M2. Conclusion Both P and R reduce the Cmax and AUC of single doses of B by approximately 58%. Future regimens with B to treat TB should avoid the inclusion of P or R. The development of B with R sparing regimens is ongoing., Background PA-824 (Pa) and bedaquiline (B) (TMC) are novel compounds in phase 2 development with established Early Bactericidal Activity (EBA) over 14 days. The study presented is an EBA study that evaluated these drugs alone or in combination with each other and with moxifloxacin (M) and pyrazinamide (Z) to identify a regimen with the potential to shorten treatment of TB in patients without the use of rifamycins or other drugs that interact adversely with antiretroviral Therapy (ART). Methods 83 participants enrolled (26% F, 74% M, including 6 HIV+) as five cohorts of 15 TB patients, each who received daily dosages of B alone, B with Z, B with Pa, Pa with Z and Pa with M and Z. A cohort of 8 patients received daily standard TB treatment (isoniazid, rifampin, Z and ethambutol: HRZE) as a control for the EBA quantitative mycobacteriology. The primary efficacy endpoint was the rate of change in number of colony forming units (CFU) of Mycobacterium tuberculosis per ml of sputum incubated on agar plates from serial sputum collections over the period Day 0 to Day 14. Results All cohorts had decreases in logCFU counts/ml of sputum from Days 0 to 14 that ranged from 1.2–2.7 over 14 days. While Z potentiated the activity of both B and Pa and compared favorably with the HRZE standard regimen, the cohort with the combination Pa-M-Z had numerically the greatest effect on CFU reduction. Conclusion The combination regimen of Pa-M-Z has potent bactericidal activity over 14 days in patients with pulmonary TB and has the potential to treat both Drug Sensitive- and Drug Resistant-TB (contains no INH or rifampicin) without adverse clinical interactions with ART. This regimen has been taken into an 8 week trial to treat DS- and DR-TB in patients with and without HIV infection., Background The impact of HIV on MDR-TB treatment outcomes in sub-Saharan Africa remains unclear where extensive rollout of highly active antiretroviral therapy (HAART) has occurred. We therefore compared the time to initial culture conversion among patients with and without HIV infection in a setting of individualized, ambulatory MDR-TB care in Botswana. Methods We performed a prospective cohort study of MDR-TB patients receiving ambulatory care at two public clinics in Botswana. The time to culture conversion and proportion converting were compared by HIV status using Cox proportional hazard ratios (HRs). Results 40 HIV-infected and 30 HIV-uninfected patients with MDR-TB and follow up cultures were identified. The median CD4+T-lymphocyte count of those with HIV was 215 cells/mm3 (IQR 129–347), and 36 (90%) were on HAART. 85% of HIV-infected and 83% of HIV-uninfected achieved culture clearance. The median time to initial culture conversion was 78 days (IQR 42–186) for HIV-infected and 95 days (IQR 70–133)for HIV-uninfected individuals [log rank p=0.62; unadjusted HR=0.9 (95% CI: 0.5 to 1.5)]. Adjusting for age, gender, TB treatment history and number of active antitubercular drugs used did not change this result [adjusted HR=0.8 (95% CI: 0.4 to 1.4)]. Toxicity was frequent in all subjects: ototoxicity occurred in 53% and 70%, neuropathy in 40% and 10%, and nephropathy in 25% and 7% of HIV-infected and uninfected patients, respectively. Neuropathy (p=0.005) & nephropathy (p=0.044) were significantly associated with HIV infection. Conclusion We found no difference in the proportion or time to initial sputum culture conversion between an HIV-infected and non-infected cohort of MDR-TB patients in Botswana. These results suggest that microbiologic outcomes among those with HIV can be comparable to those without HIV in similar settings with access to individualized TB treatment and HAART., Background Tuberculosis, the leading cause of death among HIV patients, is difficult to diagnose with smear microscopy. Xpert MTB/RIF, a near point-of-care, fully automated, nucleic acid amplification test for TB and for the detection of rifampin resistance, has been endorsed by WHO. Xpert has increased sensitivity compared with smear microscopy; however its cost-effectiveness and affordability in resource limited settings is still controversial. Methods Between August and December 2011, Partners in Hope integrated Xpert MTB/RIF alongside fluorescence microscopy for TB evaluation.Attribute of LaboratoryMicroscope typeTechnician experience and expertiseLaboratory staff workloadQuality of AFB MicroscopyPartners in HopeFluoroscenceAdvancedUsually manageableGoodStandard Malawian AFB laboratoryConventionalUsually limitedUsually overburdenedUsually poorAttributes of study laboratory and standard lab. All HIV-TB suspects were evaluated with spot AFB smear, morning Xpert and another spot smear. Patients were classified as smear-positive, indeterminate (only one scanty smear) or smear-negative based on Malawi TB Guidelines. Smear and Xpert results were compared to determine the number of excess cases detected by Xpert. Cost per excess case detected was calculated. Results 436 clinical samples were tested using Xpert. 417 were sputum samples and 19 extrapulmonary samples. Of 64 samples which tested positive by Xpert, 61 were sputum samples and 3 extrapulmonary samples. Corresponding smear results were available for 58 sputum samples. Table 1 shows a comparsion of Xpert and smear results. AFB smear Positive AFB smear indeterminate AFB smear negative Xpert positive (Total 58 with smears available)35158% of total positive60%26%14%Comparsion of Xpert and Smear results. 14% of the Xpert positive samples were smear negative and only diagnosed by Xpert testing. Another 26% of samples were indeterminate and Xpert helped confirm the diagnosis. No sputum yielded a positive smear and negative Xpert. Xpert increased detection by 16% if scanty smears are considered positive, or 65% if scanty smears are considered negative. Cost per smear negative case detected is shown in Table 2 (note the two calculations based on how scanty smears classified). Total smear negative sputum samples Smear negative with positive Xpert NNT to detect one smear negative Cost per test cartridge Total cost to detect one smear negative case with Xpert “Scanty” smears considered positive367846$20$920“Scanty” smears considered negative3822317$20$340Cost to detect one smear negative case. Conclusion Xpert MTB/RIF increased TB detection by 16%-65% compared to fluorescence microscopy in a well-equipped laboratory. The Xpert may perform differently in a less sophisticated laboratory. However, cost per case detected was high and not affordable in Malawi., Background Xpert® MTB/RIF is a new molecular diagnostic tool, developed to increase detection and shorten time to diagnosis of sputum-smear-negative (SSN) tuberculosis (TB). In April 2011, Médecins Sans Frontières (MSF) in collaboration with the Zimbabwean Ministry of Health and Child welfare implemented two Xpert® MTB/RIF systems in a rural district in Zimbabwe serving two hospitals and 26 decentralised primary care clinics. Methods From May to October 2011, parallel testing with both smear microscopy and Xpert® MTB/RIF was performed on specimens from all TB suspects. We used information abstracted from clinical and laboratory records to compare the number of laboratory-confirmed TB cases, number of TB notifications, and the time to diagnosis among HIV/TB co-infected patients with sputum-smear-negative TB during 6 months before and after Xpert® MTB/RIF implementation. Results A total of 1672 sputum specimens were processed, of which 184 (11.0%) were smear-positive. Mycobacterium tuberculosis was detected by Xpert® MTB/RIF in 116 (7.8%) of the 1488 remaining smear-negative specimens. Comparing the period after implementing Xpert® with the period before, the proportion of TB notifications that were smear positive (33% versus 27%), smear-negative (48% versus 49%), sputum not tested (11% versus 12%), and extra-pulmonary (8% versus 12%) was unchanged. The median time to TB treatment initiation among HIV/TB co-infected patients with sputum-smear-negative TB, decreased at decentralised sites (from 18.5 days to 7 days), but remained constant at the hospital level (5.5 days before and 6 days after). Conclusion Xpert® MTB/RIF increased the number of laboratory-confirmed TB cases in rural Zimbabwe, enabling further task shifting of TB management. In settings where access to chest X-Ray and trained doctors is lacking the impact on TB notifications may be greater. Time-to-initiation of TB treatment at the decentralized clinics was reduced, which has the potential to reduce morbidity in individuals and reduce the risk of TB transmission to others., Background Recently, WHO recommended that GeneXpert MTB/RIF be used as first line diagnostic to test for TB in HIV positive individuals. Most patients initiating ART lack the classical symptoms for TB resulting in missed diagnosis. The role of symptom screen in predicting a positive GeneXpert result among pre-ART patients was studied. Methods This was a nested cohort study within a GeneXpert impact evaluation trial in pre-ART patients. TB symptomatic and asymptomatic adults (>18 yrs) at an ART initiation clinic in Harare were recruited between October 2011 and February 2012. For each patient, two spot sputum samples were collected and induction with 6% hypertonic NaCl performed in those who could not expectorate. Sputum samples were tested with GeneXpert (Cepheid) Test. Participants were followed-up for 3months. Results 150 participants were recruited and 126 produced specimens and were tested for TB using GeneXpert. Median CD4 count was 165cells/ul (IQR 79–256). Fifty-four percent of the participants had a cough (68/126). Induction was carried out in 19 participants and of these, 47% (9/19) were coughers and 53% (10/19) non-coughers. TB was diagnosed in 10% of participants (13/126; 95% CI 4–16); with an additional 2 cases diagnosed on second GeneXpert test. Significant predictors of disease were cough of any duration (p=0.019), night sweats (p=0.03) and weight loss (p=0.04). Of those induced, 16% (3/19) had a positive GeneXpert result. Notably, induced samples accounted for 23% (3/13) of the TB cases detected. Three percent (2/58) of the non-coughers were GeneXpert positive. Seven participants (5%) with negative GeneXpert results were started on TB treatment based on clinical suspicion. Conclusion TB testing using GeneXpert in pre-ART patients, with sputum induction, should be carried out routinely regardless of patient TB symptom status. A two step screening test and Xpert testing algorithm is needed for scale-up of universal TB testing in pre-ART patients., Background PNU-100480 is a linezolid analog with superior bactericidal activity against Mycobacterium tuberculosis in the hollow fiber, whole blood and mouse models that is time-dependent and unaffected by resistance mutations for standard TB drugs. PNU-100480 neither induces nor inhibits CYP3A4. This study is its first in TB patients. Methods Sputum AFB smear positive South African patients (incl. HIV+ not requiring ART) were randomly assigned to PNU-100480 600 mg BID (N=25) or 1200 mg QD (N=25), or standard 4-drug therapy (HREZ, N=9) for the first 14 days of treatment. Sputum mycobacterial burden was monitored both as log CFU/ml and time to detection (TTP) in automated liquid culture system (MGIT). Results 20% of subjects were women; 7% were HIV+. All subjects completed assigned treatments. There were no treatment-related serious adverse events nor any permanent discontinuations or dose reductions due to laboratory abnormalities. There was no effect on the QT interval. At baseline, the mean log CFU/ml and TTP were 6.95 and 116 hrs, respectively. Changes in mycobacterial burden during treatment are shown below. Lines indicate estimates by mixed-effect model repeated measures (MMRM) analysis; shading indicates 90% CI. MMRM analysis revealed that the 90% CI after the full treatment period excluded zero for all 3 treatments and for both monitoring methods. Seven PNU-treated patients (14%) had transient, asymptomatic ALT elevations on day 14 to 2–3x ULN that subsequently returned promptly to normal; none met Hy's law criteria. Conclusion Treatment with PNU-100480 600 mg BID or 1200 mg QD reduced the mycobacterial burden in sputum during 14 days of treatment. Both treatments were safe and reasonably well tolerated. Further studies of PNU-100480 in tuberculosis are warranted. EBA., Background More than 80% of patients with multidrug-resistant tuberculosis (MDR-TB) in Tugela Ferry, South Africa are co-infected with HIV. Concomitant treatment for both diseases is recommended, but concern about severe and additive toxicities of MDR-TB therapy and ART has slowed acceptance of community-based treatment. Methods Confirmed MDR-TB patients were treated at home by an injection team and returned to the clinic monthly where they were screened for common adverse events (AEs). Severity was graded using the DAIDS toxicity table. Safety labs were drawn monthly and TSH was drawn every 3 months. We reviewed clinical and laboratory AEs for all patients between November 2008 and April 2011. We examined the incidence of each AE in 6-month time blocks and the within-patient trend of each AE over time. We compared those who received concomitant MDR-TB/ART treatment to those who received MDR-TB treatment alone. Results Of 91 MDR-TB patients, 55% were female; median age was 34 (IQR 29–41); and 84% were HIV co-infected. 74 patients (97% of HIV+) were receiving ART and median baseline CD4 cell count was 207 cells/mm3 (IQR: 89–411). Ninety-nine percent of patients reported at least one AE during treatment, but most were mild and did not require therapy modification. The most common AEs were peripheral neuropathy (73%), injection site pain (66%), and arthralgia (43%). The most common severe AEs (grade=3) were psychosis (10%) and hypothyroidism (29%). Patients receiving concurrent ART did not experience AEs more frequently than those on MDR-TB therapy alone. Patients were significantly less likely to report most AEs later in their treatment course (Figure 1).Figure 1 AEs by 6-month time blocks. Conclusion Home-based treatment of MDR-TB and HIV is associated with high rates of mild AEs which are not increased by concurrent ART and can be managed symptomatically without changing MDR-TB therapy or ART. Treatment can be safely administered in a home-based care setting., Background The effect of chronic hepatitis B (HBV) on HIV outcomes is relatively unknown in sub-Saharan Africa (SSA) where a high burden of HIV-HBV co-infection exists. Methods Clinical and immunologic outcomes in response to ART were compared longitudinally between HIV mono- (HIV+) and HIV-HBV co-infected (HIV&HBV+) adults enrolled between November 2004-December 2010 at 18 Management and Development for Health (MDH)-PEPFAR supported HIV clinics in Tanzania. Inclusion criteria were: tested ≥×1 for HbsAg (DIMA), age ≥15, no prior ART. Results The prevalence of HBV was 837/13,107 (6.4%).Compared to HIV+ patients, HIV&HBV+ patients were more likely to be male, older, have lower median CD4+ cell counts, and higher ALT's (p values 120IU/L [38/813 (4.7%) vs. 303/12,136 (2.5%); HR 1.76 (1.25, 2.49), p200IU/l [20/831 (2.4%) vs. 102/12,236 (0.8%); HR 2.74, (1.66, 4.05), p, Background Few studies have examined the natural history of chronic hepatitis C virus (HCV) infection among HIV-infected persons in the era of combination antiretroviral therapy (cART). Our objectives were to: 1) compare the incidence of hepatic decompensation between cART-treated HIV/HCV-coinfected and HCV-monoinfected patients, and 2) evaluate determinants of decompensation among coinfected patients on cART. Methods We performed a cohort study among 4,286 cART-treated HIV/HCV-coinfected and 6,639 HCV-monoinfected patients in the Veterans Aging Cohort Study Virtual Cohort (1997–2010). All patients had HCV viremia and were HCV treatment-naïve. Coinfected patients received cART for at least one year and had an HIV RNA result >500 copies/mL within 180 days prior to starting cART (to identify new cART initiators). Hepatic decompensation events (defined by diagnoses of ascites, spontaneous bacterial peritonitis, variceal hemorrhage, or hepatocellular carcinoma) and death were evaluated. Cox regression was used to determine the adjusted hazard ratio (aHR) of hepatic decompensation associated with cART-treated coinfection and evaluated baseline risk factors for decompensation (alcohol abuse, non-black race, diabetes mellitus, FIB-4 >3.25, hemoglobin3.25 (aHR=7.18 [5.12−10.07]), and baseline hemoglobin, Background HIV-1/HCV coinfected patients respond poorly to pegylated interferon(PEG-IFN) and weight-based ribavirin(WBR), with sustained virologic response(SVR) of 27% in genotype 1 HCV treatment-naïve subjects (ACTG 5178 results). Nitazoxanide(NTZ) plus PEG-IFN and WBR has demonstrated improved efficacy in HCV monoinfected subjects. We hypothesized that addition of NTZ to PEG-IFN/WBR would improve HCV virologic responses in HIV-1/HCV co-infected persons. Methods HIV-1/HCV genotype 1 co-infected subjects naïve to HCV treatment received 4-week lead-in of NTZ(1000 mg/day) followed by 48 weeks of NTZ, PEG-IFN alfa-2a(180 µg/week) and WBR(1000–1200 mg/day). SVR was defined as undetectable serum HCV RNA (, Background The objective of this study was to examine the immunogenicity of the HPV-6, -11, -16, -18 vaccine in HIV-infected young women. Methods This phase II, open-label, multi-center trial was conducted through the Adolescent Trials Network for HIV/AIDS Interventions. Participants were 16-23 year-old women behaviorally infected with HIV. Two groups were enrolled: Group A (ART naÿ or had not received HAART for at least six months prior to study entry) and Group B (had received HAART for at least 6 months, with two HIV-1 RNA plasma viral loads, Background HIV-infected women are disproportionately affected by human papillomavirus (HPV)-related anogenital disease. A5240 is a clinical trial of 319 HIV-infected women at US, Brazil and South Africa sites to determine immunogenicity and safety of the quadrivalent HPV vaccine. Methods Safety and serostatus of HPV types 6, 11, 16, and 18 were examined in 222 women. The vaccine was administered at 0, 8, 24 weeks in 3 strata based on screening CD4: >350 (A), 201-350 (B), ≤200 cells/mm3 (C). HPV serotyping was performed using competitive Luminex Immuno-Assay (HPV-4 cLIA). HPV type-specific seroconversion analysis was on participants seronegative for the given type at baseline. Seroconversion was defined by: ≥20, ≥16, ≥20, ≥24 mMU/mL for types 6, 11, 16, 18 respectively. Two-sided 95% CIs are provided. Results We report preliminary safety and week 28 seroconversion results from A and B. At baseline, median age was 37 years (range 19–45), 13% were white, 57% black, and 29% Hispanic. Median nadir CD4 was 262 cells/mm3, 41% had undetectable HIV-1 viral load, 13% from non-US sites. No safety issues were identified; none of the grade ≥3 AEs was thought to be vaccine-related. Proportion of Women who Seroconverted 4 weeks After the Vaccination Series: HPV Type Baseline seronegatives 6 11 16 18 Stratum A CD4>350N=50N=79N=62N=73>Seroconversion proportion (95% CI)96% (86–99%)97% (91–100%)98% (91–100%)90% (81–96%)Geometric Mean Titers (95% CI)425 (289–627)454 (337–611)1088 (777–1524)160 (114–225)Stratum B 200200., Background Antiretroviral therapy (ART) reduces the risk of tuberculosis, but the incidence still exceeds that in HIV-uninfected people. Retrospective cohort studies suggest an additive benefit of isoniazid preventive therapy (IPT) in patients on ART, but there are no controlled data on the efficacy and safety of IPT for patients on ART. Methods Using a pragmatic randomized double-blind placebo-controlled study design, we evaluated the efficacy of IPT among HIV-infected participants established on ART or newly starting ART in Khayelitsha, South Africa. Participants were randomized to daily isoniazid or matching placebo for twelve months, and followed for up to four years. Tuberculosis was excluded at screening by sputum culture. Development of incident tuberculosis was the primary endpoint. Secondary endpoints included toxicities and deaths. Results 1,329 participants contributed 3227 person-years (PY) of follow-up in the modified intention to treat analysis; 662 on placebo and 667 on IPT, with comparable CD4+count and proportion starting ART. Overall there were 95 incident tuberculosis cases: 3.6 (95% CI 2.8–4.7) versus 2.3 (95% CI 1.6–3.1) per 100 PY in the placebo and IPT arms respectively (HR 0.63, 95% CI 0.41–0.94, p=0.026). Study drug was discontinued due to pre-specified toxicity in 2.5% in the placebo arm and 4.1% in the IPT arm (logrank p=0.13). The number of deaths was similar between arms (3.0% and 2.1 respectively, logrank p=0.29). Conclusion Under field conditions, twelve months of IPT reduced the incidence of TB without causing excess harm in HIV-infected individuals established on ART or newly starting ART. It is feasible to implement IPT in busy ART clinics in settings with high HIV/TB co-morbidity., Background With improved survival of HIV-infected children, neurocognition is an important area to address. We examined the effects of HIV infection on cognitive, neurological, and behavioral functioning on perinatally-infected children. Methods HIV-infected children (4–15yrs) were recruited from a tertiary-care center in India, along with age-gender-and-income-matched HIV-negative children. Assessment tools included (i) soft neurological signs: Physical and Neurological Examination for Soft Signs (PANESS); (ii) neurocognition: culturally-adapted Wechsler Preschool and Primary Scales of Intelligence (WPPSI), Wechsler Intelligence Scale for Children (WISC-III); (iii) adaptive behaviour: Vineland Adaptive Behaviour Scales (VABS). Results We studied 167 children, (82 HIV-infected, 85 HIV-uninfected) with 56% males and mean age 8.6 yrs. Total IQ scores were lower among HIV-infected children compared to HIV-uninfected children (74.9 12.9 versus 87.915.4, p20%, (IQ 77.112.8, p=0.03). Viral load and ART status has no effect on IQ scores. Multivariate regression revealed that HIV status, weight-for-age Z-score and hemoglobin were independent factors that affected IQ scores (adjusted r2=0.25, p=0.006). The presence of HIV infection independently decreased IQ scores by 9.22 units. PANESS scores were higher among HIV-infected children compared to uninfected children (HIV-positive: 7.5, [3, 13.3]; HIV-negative: 4, [1.5, 9.5], p=0.02) suggesting higher degree of subtle neurological abnormalities in this group. Adaptive behaviour scores were similar for both HIV-infected and uninfected children irrespective of age and sex. Conclusion HIV-infected children had lower IQ scores and higher prevalence of soft neurological signs compared to HIV-uninfected children, indicating that subtle neurocognitive impairment is an important feature of perinatally-acquired HIV infection, particularly those with poor nutritional status. We recommend routine neurocognitive assessment and suggest that early intervention with initiation of ART before the onset of severe immunosuppression may improve outcomes in these children., Background HIV infected patients receiving combination antiretroviral therapy are at higher risk of cardiovascular morbidity and have accelerated aging notably of cognitive functions. The link between cardiovascular risk factors and cognition has rarely been investigated in HIV-infected cohorts. In a large hospital-based cohort, we explored whether cardiovascular risk factors are associated with cognitive performances. Methods The ANRS-CO3 Aquitaine Cohort recruits patients through a hospital-based information system on HIV-1 infection in the Bordeaux University Hospital in the Aquitaine region, South Western France. Between 2007 and 2009, 403 patients participated in a sub-study and had a thorough assessment of several cognitive domains. Cognitive performances were analyzed using both the raw test scores and the presence of neurocognitive impairment (NCI), based on the most recent definition of HIV-associated neurocognitive disorders. Selected cardiovascular risk factors were type 2 diabetes, hypertension, hypercholesterolemia, smoking status and BMI. Covariance analyses were computed to investigate the association between cardiovascular risk factors and raw cognitive test scores, adjusting for potential confounders. Logistic regression with the same covariates was used to analyse NCI as dependent variable. Results Mean age was 47.3 years and 79% were male. The prevalence of cardiovascular risk factors ranged from 9.7% for diabetes to 49.6% for current smoking, and 37.7% of participants had NCI. Lower performances in all cognitive tests were related to older age and lower education. Among cardiovascular risk factors, diabetes was significantly associated with lower performances in all cognitive tests after adjusting for potential confounders. By contrast, no such consistent associations were noted for any other cardiovascular risk factors. Diabetes prevalence did not significantly differ by NCI status (p=0.44). Conclusion In this hospital-based cohort, diabetes, but not the other cardiovascular risk factors, is associated with lower performances in all assessed cognitive domains. The mechanisms underlying our findings remain to be clarified but could involve inflammation and microcirculation., Background Current literature indicates that infection with HIV contributes to an increased risk of acute stroke. The goal of this study is to compare clinical and epidemiological characteristics of stroke patients with and without HIV infection. Methods We performed a retrospective chart review of stroke patients who were admitted to the stroke unit between January of 2005 and June of 2011. We identified 43 patients with known HIV infection at the time of admission for acute stroke. 101 controls were randomly selected from non-HIV patients who had acute stroke within the same time period. Clinical and epidemiological characteristics of two groups were compared. Results Of 1679 admissions with acute stroke, 43 (2.6%) were in HIV-infected patients (32 males, 11 females) and 101 in non-HIV infected patients (45 males, 56 females). Mean age was 57.8 years and 72.6 years, respectively. All 144 patients had acute ischemic stroke confirmed by imaging. Significant difference was identified in age, race, blood pressure on admission, National Institute of Health Stroke Scale (NIHSS) on admission, and HDL level (Table 1). The presence of co-morbidities (HTN, DM, hyperlipidemia), body mass index (BMI), homocysteine level, LDL, and coagulation profiles were not statistically different between two groups. In the HIV+ group, 30 patients (83%) were taking HAART prior to stroke onset. CD4 count was available in 37 patients; 21 had CD4 >200 cells/mm3 and 16 had CD4< 200 cells/mm3 (mean CD4 count=329.7 cells/mm3).Table 1Results of Significant CharacteristicsCharacteristicHIV Positive Group(N = 43)HIV Negative Group (N = 101)P ValueAge-Mean (Range)57.8 (41–80)71.6 (34–99)0.001Male sex-no (%)32 (74.4%)45 (44.6%)0.007Race0.001Caucasian11 (45.8%)72 (72.7%)African American13 (54.2%)14 (14.1%)Asian0 (0%)13 (13.1%)NIHSS on admission5.399.090.03Systolic Blood Pressure on Admission142.18158.190.018HDL (mg/dl)40.7247.710.043 Conclusion HIV infection increases the risk of stroke in younger patients. They have lower blood pressure, HDL and NIH stroke scale on admission compared to HIV negative stroke patients. Prevalence of DM, HTN, hyperlipidemia and other metabolic factors were not significantly different in the two groups, although the relatively small sample size and retrospective nature of the study represent limiting factors., Background To further our understanding of anal lesions in relationship to HPV genotypes in HIV-infected men who have sex with men (MSM), we analyzed HPV genotype distribution in anal disease categories based on cytology and histology results. Knowledge of HPV genotype attribution can allow estimation of the preventable fraction of anal intraepithelial neoplasia (AIN) and may indicate disease misclassification. Methods 363 HIV-infected MSM underwent anal cytology and high-resolution anoscopy/biopsy at an anal cancer screening clinic. Anal disease categories were determined by combining histology and anal cytology results. We evaluated presence of HPV genotypes by Linear Array and estimated preventable fractions of anal lesions based on attribution to genotypes included in bivalent, quadrivalent, and nonavalent HPV vaccines. We explored classification of histology-cytology disease groups based on distribution of carcinogenic HPV genotypes using unsupervised hierarchical clustering. Results The proportion of carcinogenic HPV infections increased from 51.4% in MSM without AIN to 98.2% in those with AIN3. HPV16 was the most common HPV genotype overall (28.1%) and among MSM with AIN2/3 lesions (51.8%). The attribution fractions of AIN2/3 to genotypes included in HPV vaccines ranged from 56.4% (95% CI: 47.0–65.3) for the bivalent vaccine to 89.1% (95% CI: 81.9–93.7) for the nonavalent vaccine. (Table) In the exploratory clustering analysis, the disease group of normal histology/HSIL cytology and AIN1histology/HSIL cytology clustered with AIN2/AIN3 on histology based on the distribution of carcinogenic HPV types. (Figure).Figure 1 Unsupervised hierarchical clustering of AIN disease categories (various cytology-histology combinations) by distribution of carcinogenic HPV gentypes. Table 1Potential range of vaccine protection in a cross-sectional study of n=363 HIV-infected MSM: attribution schemes for AIN2/3* lesions to HPV genotypes in prophylactic HPV vaccines Prevalence of HPV vaccine genotypes in AIN2/3 lesions Cases with single carcinogenic HPV type1 Cases with any HPV type2 Hierarchical attribution fraction of AIN2/3 to HPV vaccine genotypes3 Genotypes in bivalent HPV vaccine: HPV16/18 36.7% (95% CI: 21.9–54.5) 61.8% (95% CI: 52.5–70.3) 56.4% (95% CI: 47.0–65.3) Genotypes in quadrivalent HPV vaccine: HPV16/18/6/11 40.0% (95% CI: 24.6–57.7) 70.0% (95% CI: 60.9–77.8) 56.4% (95% CI: 47.0–65.3) Genotypes in nonavalent HPV vaccine: HPV16/18/6/11/31/33/45/52/58 86.7% (95% CI: 70.3–94.7) 92.7% (95% CI: 86.3–96.3) 89.1% (95% CI: 81.9–93.7)*AIN2/3: refers to a diagnosis using a combined cytologic-histologic endpoint of AIN2 (AIN2 histology or HSIL-AIN2/ ASC-H cytology) or AIN3 (AIN3 histology or HSIL-AIN3 cytology); this does not refer to a histologic classification of “AIN2/3” (or moderate to severe dysplasia) which would be classified as AIN3 (based on automatic default to the more severe disease category in case of dual/intermediate disease classification).1Genotypes from cases in whom only a single carcinogenic type is detected, irrespective of additional possible/non/unknown carcinogenic types (n=30 cases of HO cases of AIN2/3).2Genotypes from cases in whom arty HPV type was detected (n=l09 cases of 110 cases of AIN2/3).3in ‘Hierarchical attribution’, HPV genotypes are attributed proportionally to the case by the most frequent type (according to hierarchical frequencies in the AIN2/3 category), This allows attribution of HPV genotypes to the disease category regardless of multiplicity of infections.. Conclusion A substantial fraction of high grade AIN can be prevented by prophylactic HPV vaccines. Both anal cytology and high resolution anoscopy followed by anal biopsy and histology have limited sensitivity for prevalent anal precancer. We demonstrate that combined histology-cytology disease categories can improve misclassification in cross-sectional studies. Our analytical framework can be useful to compare attribution of anal disease categories to HPV genotypes across various populations and to estimate the extent of disease misclassification., Background Maraviroc (MVC) is a CCR5 antagonist approved for the treatment of CCR5-tropic (R5) HIV-1. This study evaluated a once-daily (QD), dual-therapy regimen of MVC plus atazanavir/ritonavir (ATV/r) in treatment-naïve patients; 96-week outcomes are presented. Methods In this Phase 2b, randomized, open-label study, 121 R5 HIV-1-infected patients received either MVC 150 mg QD (n=60) or tenofovir/emtricitabine (TDF/FTC) 200/300 mg QD (n=61) with ATV/r 300/100 mg QD for 48 weeks, later extended to 96 weeks. The primary endpoint was the proportion of patients with HIV-1 RNA500 copies/mL at failure or study discontinuation; virologic analyses detected no resistance, change in tropism or loss of susceptibility relevant to treatment in either arm. At Week 48, there was a greater reduction in immune activation on CD4+ cells in patients receiving MVC versus TDF/FTC. Markers of bone formation were significantly different between arms at both 48 and 96 weeks. Conclusion Durable virologic activity of MVC 150 mg QD+ATV/r was demonstrated through 96 weeks, with no differences between the arms in the rates of virologic failure, no resistance or change in tropism seen, and with most of the treatment difference due to low-level transient viremia. Differences between the arms in immune activation and bone markers require further investigation., Background Cobicistat is a novel investigational pharmacoenhancer with no anti-HIV activity. Methods An international, randomized, double-blind, double-dummy, active controlled trial was conducted to evaluate the efficacy and safety of cobicistat vs ritonavir as pharmacoenhancers of atazanavir (ATV/co vs ATV/r group) in combination with tenofovir disoproxil fumarate (TDF)/emtricitabine (FTC) in treatment-naïve patients. Key eligibility criteria were HIV-1 RNA ≥5,000 copies/mL, estimated glomerular filtration rate by Cockcroft-Gault formula (eGFR) ≥70 mL/min. Primary endpoint was HIV-1 RNA 100,000 copies/mL, the response rates were similar (86 vs 86%). Two subjects in ATV/co and none in ATV/r group developed resistance mutations to study drugs; both were M184V/I. Similar percentages of subjects in both groups (ATV/co vs ATV/r) had serious adverse events (AEs) (11 vs 7%), discontinued study drug due to any AEs (7 vs 7%), or had bilirubin-related AEs (4 vs 3%). Median increases in total bilirubin at Week 48 in ATV/co and ATV/r group were 1.9 and 1.7 mg/dL. Median increases in serum creatinine were 0.13 and 0.09 mg/dL. Median increases in total cholesterol were 4 and 10 mg/dL; increases in triglycerides were 16 and 24 mg/dL. Plasma exposures of ATV (steady state mean Ctau [ng/mL]) were comparable (796.1 vs 853.4). Conclusion ATV/co was noninferior to ATV/r in combination with TDF/FTC at Week 48. Both regimens achieved high rates of virologic success. Safety and tolerability profiles of the two regimens were comparable. ATV/co (n=344) ATV/r (n=348) Age (years), median3637Male83%83%Race-White58%62%HIV-1 RNA (log10copies/mL), median4.784.84HIV-1 RNA >100,000 copies/mL38%41%CD4 count (cells/mm3), median348341CD4 count ≤200 cells/ mm3 17%16%Baseline Characteristics. ATV/co (n=344) ATV/r (n=348) Snapshot Analysis85%87%Snapshot Analysis (Per Protocol)98%98%Time to Loss of Virologic Response83%85%Missing=Failure89%90%Missing=Excluded97%96%Efficacy at Week 48 (HIV-1 RNA, Background Antiretroviral regimen simplification improves both quality of life, and long-term medication adherence while reducing the risk of HIV virologic failure (VF) and long-term drug-related toxicities. FTC/RPV/TDF is a well-tolerated, once daily STR treatment option. This is the first study to evaluate the efficacy and safety of switching from boosted Protease Inhibitor (PI) based HAART to a simplified regimen of FTC/RPV/TDF STR. Methods A randomized, open-label, multi-center, international, 48 week study to evaluate the safety and efficacy of switching from ritonavir-boosted PI regimens to FTC/RPV/TDF in virologically-suppressed (HIV RNA, Background Once-daily elvitegravir (EVG) was noninferior in efficacy and well-tolerated relative to twice-daily raltegravir (RAL) in combination with a fully active ritonavir-boosted protease inhibitor (PI/r) and another second agent in a phase 3 study of treatment-experienced patients (GS-US-183-0145) at Week 48. We present the blinded 96-week results. Methods Randomized, double-blinded, active-controlled, 96-week noninferiority trial. Key eligibility criteria were HIV-1 RNA ≥1,000 copies/mL, any CD4 cell count, and resistance to and/or 6 months’ experience with at least two classes of antiretroviral drugs. Primary endpoint was achievement and maintenance of HIV-1 RNA 5×ULN) were less common on EVG vs. RAL (2.3 vs. 5.9%; 1.7 vs. 5.3%). No other differences in graded laboratory abnormalities were seen. Conclusion At Week 96, once-daily EVG in combination with a fully active PI/r and another second agent in treatment-experienced patients continue to be noninferior to twice-daily RAL in efficacy with excellent tolerability. These data support the long-term use of EVG in treatment-experienced patients. TLOVR EVG (n=351) RAL (n=351) Virologic response47.6%45.0%Virologic failure22.8%27.4%Death0.6%2.6%Drug discontinuation26.5%20.8%Adverse events2.6%4.3%Lack of efficacy3.7%2.0%Lost to follow-up5.4%6.8%Other reasons17.4%12.0%Emerging major INSTI resistance6.6%7.4%Efficacy at Week 96 (HIV-1 RNA, Background The integrase inhibitor, Dolutegravir (DTG; S/GSK1349572), has shown rapid and durable antiviral response, with a favorable tolerability profile. Methods In this multicenter, double-dummy-blinded, Phase III, non-inferiority study, HIV-1 infected ART-naive adults with HIV-1 RNA ≥1000 c/mL and no evidence of viral resistance were randomized 1:1 to receive DTG 50 mg QD or RAL 400 mg BID, in addition to investigator-selected backbone NRTIs of either TDF/FTC or ABC/3TC. Subjects were stratified by screening HIV-1 RNA (≤ and >100,000 c/mL) and backbone NRTI selection. The primary endpoint was proportion of subjects with HIV-1 RNA100,000 c/mL, 41% ABC/3TC. Proportion of subjects meeting the primary endpoint was 88% for DTG and 85% for RAL; difference (2.5%; 95% CI: −2.2% to 7.1%) met 10% non-inferiority criteria. For subjects with HIV-1 RNA >100,000 c/mL, response rate was 82% for DTG vs 75% for RAL. Secondary analyses supported non-inferiority: HIV-1 RNA, Background AZT/3TC/NVP and TDF/3TC/NVP BID have been recommended 1st-line ART regimens in Rwanda. TDF/3TC/NVP is the least well studied of the WHO-recommended 1st-line regimens. We compared the efficacy of this regimen with AZT/3TC/NVP. Methods Between 2009 and 2011, we enrolled ART-naive patients. CD4 counts (cells/ul) and viral load (VL) were collected before ART and at 26 and 52 weeks. The primary endpoint was a VL 1000 copies/ml. Results 1,072 HIV+ ART-naive patients were enrolled: 521 (48.6%) received AZT/3TC/NVP (AZT), 551 (51.4%) received TDF/3TC/NVP (TDF). Median age was 37; 64% were women. Median baseline CD4 count was similar 260, VL was >100,000 copies/ml in 43% (AZT) vs. 32% (TDF) (p< 0.001). The AZT versus TDF, 5.4% vs. 3.8% transferred to others health facilities, 3.6% vs. 4.0% were lost to follow-up, and 1.9% vs. 2.7% died. 10%(AZT) vs 4%(TDF) of discontinued therapy due to adverse effects (p=0.001). The primary endpoint were: 80% (441/551) TDF and 78% (410/521) receiving AZT attained a VL < 200 copies/ml by week 52. The median CD4 count increase was 88 in the AZT and 50 in the TDF groups (p=0.034). However, in patients with baseline VL >100,000 copies/ml, 44% (133/351) in the TDF vs. 56% (170/351) in the AZT group attained the primary endpoint (p= 0.001). 11.8% (TDF) and 7.7% (AZT) underwent GRT. 58% had >=1 NNRTI-resistance mutation: most commonly Y181C (34%) and K103N (16%). 53% had >=1 NRTI-resistance mutation: most commonly M184V (48%) and K65R (29%). K65R emerged exclusively in the TDF group. Conclusion TDF/3TC/NVP was as effective as AZT/3TC/NVP at attaining, Background In the ECHO and THRIVE studies (HIV-1 treatment-naive patients), rilpivirine (RPV) 25mg qd and efavirenz (EFV) 600mg qd plus background N(t)RTIs resulted in a 78% response rate (viral load [VL], Background In 2009, South Africa's National AIDS Council recommended TDF access to HIV+ adults and ABC to HIV+ infants/children. We analyzed the effects of these guideline changes on NRTI-resistance mutations in ART virological failure (VF) and analyzed the effect of the cumulative second-line LPV/r use on emerging PI resistance. Methods HIV RT and PR sequences were obtained from plasma samples submitted for genotypic resistance testing to the Tygerberg National Health Service Laboratory between 2006 and 2011 from patients experiencing ART VF. Demographic and ART treatment data were obtained from the physicians submitting samples. Results Between 2006 and 2011, 1,525 plasma samples were obtained from 1,293 patients, of whom 57% were female and 42% =1 of the following major PI-resistance mutations: V32I, M46I, I47A, I50V, I54V, L76V, V82A/F, I84V, and L90M. 17 (4%) of 42 LPV/r recipients had major DRV/r resistance mutations (V32I, I50V, and L76V). Conclusion The increased use of TDF and ABC since 2009 has been associated with a markedly increased frequency of TDF-resistance (K65R) and ABC-resistance (L74V). Compared with TDF/3TC/EFV recipients, the risk of developing K65R was higher in patients with TDF/3TC/NVP VF (88% vs 31%; p=0.002) and lower in patients with TDF/3TC/LPV/r VF (7% vs 31%; p=0.008). Among 439 LPV/r recipients, 42 (10%) had LPV/r resistance and 17(4%) DRV/r cross-resistance., Background Since the availability of viral load (VL) assay with a threshold of 20 copies/mL, some patients display VL values between 20 and 50 copies/mL. The aims of our study were to: (i) identify factors associated with low level viremia (LLV) in patients receiving stable suppressive antiretroviral therapy (cART); and (ii) assess virological outcome during the year following LLV detection. Methods Retrospective study among the 4820 patients followed in our institution fulfilling the inclusion criteria: (i) stable cART for at least 6 months; (ii) all VL 50 copies/mL)/(number of VL determinations) before study inclusion. Results Among the 656 patients included, 5.8% were in group LLV+. The nature of the ongoing cART did not differ between LLV- and LLV+ groups. In the multivariate analysis, only CDC clinical stage B/C at study inclusion (OR=2.9; 95% CI=1.4–5.9; P=0.003) and a higher “Blip Ratio” before study inclusion (OR=0.9; 95% CI=0.9–1.0; P=0.001) were independently associated with LLV. During the follow-up, the proportion of patients experiencing virological failure (2 consecutive VL >50 copies/mL) was not different between LLV- and LLV+ groups (4% vs 8%, respectively; P=0.32); and 40% of patients shifted from LLV+ to LLV- status. Conclusion LLV was infrequent in our series and the one-year follow-up did not evidence a higher rate of virological failure than in patients always fully-suppressed. LLV seems to be a transient phenomenon that might be driven by residual ongoing viral replication and/or viral release and/or accuracy of VL assay in lower values., Background Alternatives to EFV for the treatment of HIV-infection in patients with TB are warranted. Rifampin decreases RAL exposure in healthy volunteers. We estimated the safety and efficacy of two doses of RAL and EFV in HIV-1-infected adults receiving rifampin for TB. Methods Multicentre, open-label, randomized, phase II trial. Antiretroviral naïve HIV-1-infected adults were randomized to receive RAL (400 or 800 mg bid) or EFV (600 mg qd), in combination with TDF and 3TC, after starting rifampin. The primary efficacy end-point was the proportion of patients with plasma HIV-RNA level50cp/ml was the main reason for failure and occurred in 6, 11 and 16 patients in RAL800, RAL400 and EFV, respectively. There was a trend towards more RAL, 3TC, and TDF resistance in the RAL400 than RAL800 arm. Safety of the three regimens was good with only 1, 1 and 3 grade 3/4 ALT elevations in RAL800, RAL400 and EFV arms, respectively. Conclusion At week 24, RAL800 mg bid provided the highest success rate in HIV-1-infected patients receiving a rifampin-based therapy for TB and should be considered for further evaluation., Background A5202 was a randomized equivalence study of four daily regimens of efavirenz (EFV) or atazanavir/ritonavir (ATV/r) with double-blinded tenofovir and emtricitabine or abacavir and lamivudine. Previous findings from A5202 reported women assigned ATV/r had higher-risk of virologic failure (VF) than women assigned EFV; also, women on ATV/r had higher risk of VF than men on ATV/r. This analysis relates ATV clearance (CL) to treatment efficacy and safety. Methods The associations between ATV CL and times to VF and safety event (first increased grade 3/4 sign, symptom, or laboratory abnormality), while on ATV/r (as-treated), were estimated with hazard ratios (HR) from Cox proportional hazards models, adjusted for screening HIV-1 RNA (105 copies/mL) and NRTIs. Additionally adjusted models included race-ethnicity (RE), age, baseline CD4 count, and body mass index. Interactions between ATV CL and sex, RE, and NRTIs were evaluated. A 1-compartment pharmacokinetic (PK) model including 815 subjects (88% of 928 randomized to ATV/r) was used to estimate subject-specific ATV CL. Atazanavir CL was categorized by overall sample tertiles (slow:¯9 L/hr). Analyses were restricted to 768 subjects of white, black, or Hispanic RE. Results Atazanavir CL association with time to VF differed significantly by sex (p=0.003, Table 1). The association between ATV CL and time to VF did not differ significantly by NRTIs (p=0.6) or RE (p=0.085); additionally adjusted model results were similar. There was no significant association between ATV CL and time to safety event (rapid vs. intermediate: HR 1.06; 95% confidence interval (0.79, 1.43); slow vs. intermediate: HR 1.28 (0.95, 1.72), p=0.22), nor a significant interaction with sex, NRTIs or RE for this outcome (p≥0.31). ATV Clearance Association with time to VF N=768: 131 females (28 VFs), 655 males (78 VFs) Comparison Hazard Ratio (95% Confidence Interval) Rapid (n=38) vs. Intermediate (n=29) among Female3.49 (1.24–9.84)Slow (n=64) vs. Intermediate among Female0.82 (0.26–2.54)Rapid (n=249) vs. Intermediate (n=210) among Male1.50 (0.82–2.71)Slow (n=196) vs. Intermediate among Male2.10 (1.16–3.77)*ATV CL by Sex Interation: p=0.003. Conclusion The differential in CL association with time to VF by sex may reflect PK/pharmacodynamic reasons for failure, and will require further investigations., Background Nevirapine (NVP) is metabolized by cytochrome P450 (CYP) 2B6. We investigated associations between single nucleotide polymorphisms (SNPs), haplotypes, and pharmacokinetics (PK) following SD NVP to prevent mother-to-child transmission (MTCT). Methods Protocol A5207 evaluated strategies to prevent NVP resistance following intrapartum SD NVP. At onset of labor, participants received SD NVP (200 mg) and were randomized to lamivudine/zidovudine, emtricitabine/tenofovir, or lopinavir/ritonavir (LPV/r), for 7 or 21 days. Plasma for NVP assay was obtained at post-partum day 1 and week 1, 3 and 5. Derived PK parameters included the NVP elimination constant estimated using linear mixed effect models based on natural logarithm of NVP measured between day 1 and week 3. We assayed 214 SNPs in ABCB1, CYP2B6, CYP2C19, CYP3A4, CYP3A5 and NR1I2. CYP2B6 metabolizer status was based on *6/*18 haplotypes. SNP and CYP2B6 haplotype associations were based on parametric regression models adjusted for body mass index and treatment arm as indicated. Results In A5207, 422 women in Haiti, India, Malawi, South Africa, Tanzania, and Uganda received SD NVP at onset of labor. This analysis includes 304 women (217 and 87 of African and Indian descent, respectively) with suitable NVP assay and genotype data. Among individuals of African descent, CYP2B6 metabolizer status was associated with slower NVP elimination (p =0.045), but not with week 5 NVP BLQ (below limit of quantification). Median elimination constants were −0.0105 (*6/*6 6/*18 or *18/*18*), −0.0108 (*6/− or *18/−), and −0.0113 (−/−) h−1. Among these individuals on LPV/r, an ABCB1 SNP (rs7787082) was associated with slower NVP elimination (p=0.0046). Among Indians, an NR1I2 SNP (rs2472682) was associated with increased likelihood of week 5 NVP BLQ (p=0.0061). Conclusion Slow metabolizer CYP2B6 genotypes were associated with slower elimination following SD NVP. This association appeared less pronounced than that described at steady state, suggesting effects on gene inducibility. Non-CYP2B6 SNP associations may be spurious., Background Prior studies investigating pharmacogenomics and efavirenz exposure use single plasma drug levels, which are limited by marked day-to-day variability. The Women's Interagency HIV Study (WIHS) performed 24 hour pharmacokinetics (PK) studies in a large number of HIV-infected women on efavirenz and calculated areas-under-the-curve (AUC) as measures of short-term exposure; concentrations in hair assessed long-term exposure. We typed 183 single nucleotide polymorphisms (SNPs) in 9 candidate genes known to influence efavirenz absorption, distribution, metabolism and elimination (ADME) and examined them in relation to AUC and hair levels in multivariate models. Methods Intensive PK studies were conducted in 111 women (74% African American; 17% Hispanic; 9% white). SNPs (n=183) with a minor allele frequency of >0.05 were analyzed in CYP2B6, CYP2C19, CYP3A4/A5, ABCB1, ABCC2, CYP2D6, SCL22A6, UDP, and UGT1A, along with other factors that could influence PK (race, age, menstrual status, diet, liver and renal function, weight). Hair efavirenz levels were measured in 84 women. Variables were examined with log-transformed EFV AUC and hair levels via linear regression; multivariable models were constructed by forward stepwise selection, including non-genetic predictors with p-values< 0.05 and genetic predictors with p-values< 0.001. Results Non-genetic factors, such as transaminase levels and orange juice consumption, were associated with EFV AUCs, but the most significant predictors associated with exposure were CYP2B6 516G>T, CYP2B6 983T>C and a p-glycoprotein transporter (ABCB1) haplotype (Table). CYP2B6 516TT (12.6% prevalence) was associated with 3.5-fold (95% CI 2.7–4.5, p=8.6x10−19) increases in AUC and 3.2-fold (2.1–4.7, p=1.3x10−11) increases in hair concentrations.Genetic and non-genetic factors associated with short-term EFV exposure (AUC, n=111) FactorEffect on AUC (±95% CI)p-valueDistribution of factorOranges or orange juice in preceding 5 days1.26 (1.05–1.50) 0.0119 76 (68.5%)For every doubling of ALT level1.23 (1.11–1.36) 0.0001 Median ALT (range) 23 (8–117) IU/LCYP2B6 983 T > C (rs28399499) 2.2×10 −10 0 doses of minor allele (TT)1.0095 (85.6%)–0 dose 1 or 2 doses of minor allele (TC/CC)1.96 (1.54–2.5)16(14.4%)–1 doseCYP2B6 516 G > T (rs3745274) 1.4×10 −18 0 or 1 dose of minor allele (GG, GT)1.0097 (87.4%)–0/1 dose 2 doses of minor allele (TT) 3.5 (2.7–4.5) 14(12.6%)–2 dosesABCB1 hdplotype (2SNPs:rs7779562 &rs4148745) 0.0004 0 doses of the haplotype1.0014 (12.6%)–0 dose 1 or 2 doses of the haplotype1.60 (1.24–2.1)97 (87.4%)–1/2 doses Factors associated with long-term exposure (hair levels, n = 84) -models include adherence Factor Effect on hair (±95% CI) p-value Distribution of factor ALT, Orange juice, ABCB1 haplotype, and adherence (below) not significantly associated with hair levelsCYP2B6 983 T > C ( rs28399499)0.021 0 doses of minor allele (TT)1.0074 (88.1%) –0 dose 1 or 2 doses of minor allele (TC/CC)1.70 (1.09–2.7)10 (11.9%)–1/2 dosesCYP2B6 516 G > T (rs3745274)1.0×10−10 0 or 1 dose of minor allele (GG, GT)1.0071 (84.5%) –0/1 dose2 doses of minor allele (TT) 3.2 (2.1–4.7) 13 (15.5%)–2 dosesSelf-reported adherence ≤74%1.004 (4.8%)75–94%0.94 (0.45–1.96)0.8813 (15.4%)≥95%1.10 (0.56–2.2)0.7767 (79.8%)Hair EFV PG table. Conclusion A comprehensive search for SNPs in genes associated with efavirenz ADME demonstrated that CYP2B6 516TT was associated with >3-fold increases in short-term (AUC) and long-term (hair) EFV exposure. The effect of this SNP on exposure over the prolonged duration represented by hair levels is reported for the first time. Genetic testing may allow optimization of EFV dosing., Background The pharmacokinetics of raltegravir in HIV-1 infected subjects is characterized by high inter/intra-patient variability. We investigated the potential contribution of the drug pharmaceutical formulation on raltegravir pharmacokinetics. Methods We firstly compared in vivo the pharmacokinetics of raltegravir from 50 patients given the drug by swallowing with those obtained from 10 HIV-infected patients that chewed raltegravir due to swallowing difficulties. Subsequently we evaluated in vitro the dissolution of raltegravir tablets under different conditions (pH 1, pH 6.8 buffer and water). Dissolution tests were performed comparing raltegravir whole tablets with tablets crushed by grinding in mortar and pestle. Results In the in vivo study we found that the raltegravir pharmacokinetic profiles in patients given the drug by swallowing were highly variable, characterized in some cases by multiple peaks and irregular/limited absorption. Conversely, patients given raltegravir by chewing presented regular pharmacokinetic profiles, characterized by single sharp drug peak and higher raltegravir absorption compared with patients given the drug by swallowing (Figure 1).Figure 1 Raltegravir time-concentration profiles in HIV-patients given the drug by swalling or chewing. The in vitro studies showed that the whole tablets presented relatively slow release profiles due to lacking disintegration. Crushed tablets tested in water and pH 6.8 buffer exhibited prompt and complete dissolution of raltegravir. For whole tablets tested in the acidic medium the raltegravir concentrations were very low, reaching less the 10% of the dose after 2h, owing to well-known poor solubility of raltegravir at low pH. However, when crushed tablets were tested in acid the profiles presented significantly higher concentrations of raltegravir (Figure 2)Figure 2 In vitro dissolution profiles of whole tabletes versus crushed tablets of raltegravir at different pH. . Conclusion HIV-infected patients given raltegravir by chewing showed higher drug absorption compared with patients given the drug by swallowing. This may be depends to problems related to the tablets disintegration leading to erratic drug release. The improvement of the raltegravir pharmaceutical formulation could reduce variability of raltegravir pharmacokinetics, eventually contributing to increase the response of HIV-infected patients., Background To inform optimal timing of ART initiation, we analyzed clinical outcomes during follow-up of HPTN 052 incorporating both AIDS and non-AIDS events related to HIV and ART. 052 WTS LB-K-M and table. Methods HIV+ adults (CD4+350 550/µL) from Africa, Asia, and South America were randomized to ART immediately or after CD4+, Background Nigeria's population of over 150 million and HIV prevalence of 3.8% ranks it among the top 5 countries with the highest HIV burden. Since 2004, HRSA has provided PEPFAR support to Harvard/APIN to develop a HIV prevention, care and treatment program at 32 hospitals in Nigeria. Methods ART eligibility in the adult program is consistent with the Nigerian and WHO ART guidelines. Enrolled patients that gave written informed consent with greater than 6 months of ART were included in this study. Patients had clinical exams and laboratory tests, at baseline, month 3, 6, and every 6 months thereafter. All patient data was collected and stored electronically. Treatment failure was defined as 2 consecutive viral loads > 1000 copies/mL following 6 months on ART. Results As of December 2010, 76,269 adult patients were enrolled on ART, 60,600 (79.5%) of which were ARV-naïve at baseline. Nine tertiary hospitals accounted for the majority of patients (53,406; 88.4%) with the remainder at 23 secondary. Female patients were more common (64.3%) and younger compared to men (median age 32 versus 39 years). Median baseline CD4 was 143 cells/mm3 and VL was 68,731 copies/mL. First-line ART for treatment-naïve patients included zidovudine (AZT) (51.6%), tenofovir (TDF) (35.3%) or stavudine (d4T) (7.5%) plus lamivudine/emtricitabine (3TC/FTC) plus an NNRTI - nevirapine (NVP) (68.4%)/efavirenz (EFV) (26%). The cumulative virologic failure rate for naïve patients was 21.4%, with the majority of failures occurring in the first year (56.9%). Applying the revised 2010 WHO recommendation defining virologic failure at > 5000 copies/mL, the cumulative failure rate was 13.6%, with 55.8% of failures in the first year. Virologic failure by time on ART. Conclusion Virologic failure rates were highest in the first year of ART and decreased with duration of ART. Particular emphasis on drug adherence and retention in care during the first year of ART may optimize patient outcomes., Background The second-line ART was rolled out in India in 2009 at 10 centers. Patients meeting immunologic/clinical failure criteria were evaluated by an expert panel and underwent viral load testing. Those found to have a confirmed virologic failure (VL> 5,000c/mL) were started on second-line ART (zidovudine/tenofovir/lamivudine/ lopinavir/ritonavir). We evaluated 18-month outcomes of patients started on second-line treatment. Methods Patients seen monthly and CD4 was performed every 6 months. VL testing was conducted 6 months after second-line ART initiation. We performed multivariable logistic regression modeling to determine factors associated with 6-month virologic suppression (, Background A large proportion of individuals enter health care very late in the course of their HIV-infection, these individuals have a poor clinical prognosis. This analysis aims to investigate trends in the percentage of individuals presenting late for care and identify factors associated with late presentation. Methods Individuals enrolled in the Collaboration of Observational HIV Epidemiological Research Europe (COHERE), which includes 33 cohorts from across Europe, who presented for care for the first time after 1st January 2000 were included. Late presentation was defined, as a person presenting for care with a CD4 count, Background Lipoprotein Lipase (LPL) is a key enzyme in lipid metabolism, especially for plasma circulating triglycerides (TG). Genetic variants of LPL have been associated to lipid levels in healthy individuals, cardiovascular disease, obesity and diabetes. Our aim was to evaluate the influence of three polymorphisms: Hind III (intron 8), Pvu II (intron 6) and S447X (exon 9) in plasma TG levels in HIV-1 infected children under HAART. Methods 52 children (28 girls and 24 boys) diagnosed with HIV-1 between 2005 and 2009, were retrospectively selected with at least one plasma TG level assessment. Also, 86 seronegative blood donors were randomly selected to estimate allelic frequencies in Argentinean population. TG levels were examined before and after one-year of HAART. Hypertriglyceridemia was defined as TG>150 mg/dL. Hind III (H+/H−), Pvu II (P+/P−) and S447X (S/X) were determined by PCR-RFLP. Wilcoxon sum rank test was used to compare median plasma TG among groups. Results Allelic frequencies for HIV-1 infected children were: H-,0.21 P-, 0.53 and X: 0.05, with no significant difference to controls. After one year of HAART, median TG levels were significantly lower in P+/P− (144 mg/dL) and P−/P− (95 mg/dL) compared to P+/P+ (180 mg/dL) (p=0.03 and p= 0.0002, respectively). A gene dose-dependent effect was observed for P- allele, and its presence was associated with a 7-fold lower risk of hypertriglyceridemia. Additionally, when H-is accompanying P-, the risk diminished to 15-fold (p=0.008, OR=0.06, 95% CI=, Background There are limited data on the pharmacokinetics (PK) of tenofovir (TFV) administered to pregnant women during labor or to newborns. Methods HPTN 057 is a phase I trial of tenofovir disoproxil fumarate (TDF) in HIV-infected pregnant women and their neonates in Malawi and Brazil. In the current cohort, women received 600 mg TDF at labor onset or 4 hours prior to C section (C/S) and newborns received 6 mg/kg TDF suspension daily ×7 doses. Plasma samples were obtained from mothers at delivery, from cord blood and from infants before and 2, 10 and 24 hours after the 1st, 4th and 7th doses. TFV concentration (conc) was determined by HPLC/MS/MS; lower limit of quantitation was 5 ng/mL. The PK target was to keep infant TFV conc >50 ng/ml (mean trough conc in nonpregnant adults) for the first week of life. Data are presented as median (range) or geometric mean (%CV). Results 33 mother-infant pairs were studied (21 vaginal deliveries, 12 C/S). Delivery occurred median of 4.5 (0.6–11.4) hours after dosing. Mean maternal TFV conc at delivery was 108 (76.1%) ng/mL. Mean cord blood TFV conc was 61 (69.3%) ng/mL. Cord blood TFV conc was>50 ng/mL in 24/31 (77%). Mean ratio of cord blood to maternal delivery TFV conc was 0.55 (64.0%). Infant 24 hr postdose conc was>50 ng/mL in 28/31 (90.3%) after the first dose, in 27/28 (96.4%) after the 4th dose and in 22/30 (73.3%) after the 7th dose. All infant TFV conc were >30 ng/mL. All mothers and infants tolerated TDF well. Mean (CV%) infant PK parameters are presented below: Dose Cmax(ng/mL) C24h(ng/mL) AUC(ng*hr/mL) t½ (hrs) 1288 (49.9%)104 (47.9%)3939 (37.6%)13.2 (80.1%)4336 (40.5%)112 (52.1%)4413 (37.4%)14.5 (45.0%)7221 (66.1%)69.7 (45.7%)3060 (49.0%)14.6 (96.1%)Mean (CV%) infant PK parameters. Conclusion This regimen provides TFV exposure similar to adults receiving 300 mg daily doses and is appropriate for use in neonates in studies of TDF used for HIV prophylaxis or treatment., Background P1093, is an ongoing, Phase 1/2 open-label PK, safety dose finding study of DTG plus optimized background regimen (children 6 wks to, Background Pharmacokinetics, safety and antiviral activity of fosamprenavir (FPV)/ritonavir (RTV) twice daily were evaluated in protease inhibitor (PI)-naive and -experienced HIV-1-infected children aged 6 months to48 weeks. PK parameters and comparisons with historical adult data are shown in the table. Historical healthy adult 6 months to, Background Etravirine has demonstrated efficacy and safety in treatment-experienced, HIV-1-infected adults. Pediatric development is ongoing. Methods PIANO (TMC125-C213; NCT00665847) is a 48-week, Phase II, open-label trial of the safety, efficacy and pharmacokinetics of etravirine 5.2 mg/kg (maximum dose 200mg) bid in HIV-1-infected, treatment-experienced children (6–95% adherent; 70% were >80% adherent. The most common drug-related AE was rash (18%) (Table). Four percent discontinued due to rash. Serious AEs were seen in 5% of patients while 14% experienced a grade 3/4 AE. Laboratory toxicities were predominantly grade 1/2. At W48, 56% of patients achieved VL10% of patients overallzgrouped term including rash not further specified, rash macula-papular, rash generalized, rash erythematous, rash macular rash papular and rash puritic¶occurnng in >5% of patients overall; AE, adverse event NC = F, non-completer equals failure; SE standard error; TLOVR, time-to-loss of virologic response algorithm. Conclusion The efficacy, safety and resistance profiles of etravirine 5.2 mg/kg bid plus OBR in this difficult-to-treat, antiretroviral-experienced pediatric population were comparable to those observed in treatment-experienced adults (DUET trials). Responses were better in children than adolescents, most likely due to less advanced disease, better adherence and less previous NNRTI use., Background New antiretrovirals are needed for HIV+ children. IMPAACT P1066 is a Phase I/II open label multicenter trial to evaluate pharmacokinetics (PK), safety, tolerability, and efficacy of multiple RAL formulations in treatment experienced HIV+ youth. RAL was given with an optimized background regimen. Dose selection was based upon intensive PK and safety data: 400 mg BID of RAL film-coated tablet (6–18 years) and weight-based dosing (~6mg/kg BID) of RAL chewable tablet (2 to, Background In Kenya, an estimated 7,000-10,000 children are HIV infected yearly. National targets for 10% of all HIV clinic patients registered being pediatric are often difficult to reach or fall behind adult uptake. In addition, concerns exist regarding retention of children in HIV/AIDS clinics. Such challenges are often magnified in rural settings due to frequent changes in caregivers,distances away from pediatric clinics, and extremes in poverty. Methods In 2004, HIV/AIDS care and treatment programs began developing under the President's Emergency Plan for AIDS Relief (PEPFAR) program in the SRV Province of Kenya, a largely rural population. Effort has been made to decentralize care, making more clinics closer to rural populations available. In addition, initiatives such as the “Mwangalizi” (“care givers”, often HIV positive adults linked with children to assure they come to HIV clinics) project have been implemented, and pediatric HIV support groups have been established. We describe aggregate program level data for the development of/uptake in HIV pediatric clinics. Results Between 2004 and 2011, 17,572 children received HIV testing through both voluntary counseling and testing (VCT) and diagnostic testing and counseling (DTC) initiatives. 5,310 children (mean age 10.0 +/− 3.3 years, 50.6% female) were enrolled in 57 pediatric HIV clinics. Of those enrolled, 44.3% started first line ART, 2.5% switched to 2nd line ART, and 1 has advanced to 3rd line ART. In 2005, 7.0% of HIV clinic attendees were children on ART, which increased to 10.5% in 2011 (p, Background Lipid abnormality is a common long-term complication in HIV-infected children. This study aimed to compare lipid profiles in children randomized to immediate versus deferred nevirapine-based antiretroviral therapy (ART). Methods This was a substudy of PREDICT (NCT00234091), a 144-week randomized trial of immediate ART (at CD4 15–24%) versus deferred ART (at CD4200 mg/dl, Triglyceride > 130 mg/dl, LDL>130 mg/dl, HDL≤40 mg/dl. Conclusion After 3 years, children randomized to immediate nevirapine-based ART had less dyslipidemia and lower TC/HDL ratio than the deferred ART group. This supports earlier nevirapine-based initiation to achieve favorable lipid profile in children with mild to moderate HIV-associated immune deficiency., Background Metabolic abnormalities, common among perinatally HIV-infected children (HIV+), may be caused by mitochondrial dysfunction that is induced by antiretroviral therapy (ARV) or chronic viral infection. We compared mitochondrial function [oxidative phosphorylation (OXPHOS) enzyme activities and lactate levels] of HIV+ and HIV-exposed, uninfected (HEU) children and, among HIV+, determined associations with fasting glucose, insulin, and homeostatic model assessment of insulin-resistance (HOMA-IR). Methods HIV+ and HEU were enrolled from the PHACS Adolescent Master Protocol. Children with known, non-HIV-associated mitochondrial disorders were excluded. Demographic and BMI [all] and CD4, HIV viral load, ARV exposures, and fasting insulin/glucose [HIV+ only] were collected. Main outcomes included venous and point-of-care (POC) lactate, venous pyruvate, and PBMC NADH dehydrogenase (CI) and cytochrome c oxidase (CIV) enzyme activities. A Wilcoxon test was used to compare outcomes between HIV+ and HEU; Spearman correlations were determined between insulin/glucose and OXPHOS activity in HIV+. Results 112 HIV+ and 66 HEU children were enrolled as of December 2011. HIV+ were older than HEU (15.8yr vs 12.4yr) with similar gender and racial distributions. BMI-Z was lower in HIV+ (0.41SD vs 0.54SD). Among HIV+, 45% were CDC stage B/C and 74% had CD4 >500 cell/mm3 with 60% having viral load, Background Peripheral neuropathy is a well-recognised and common condition in HIV-infected adults and may be related to use of antiretroviral therapy (ART) as well as be directly caused by HIV infection. Data on the prevalence, manifestations and risk factors of neuropathy in children are limited. Only few tools are available for clinical screening for peripheral neuropathy in children. We used the neuropathy symptom score (NSS) and neuropathy disability score (NDS) to screen for peripheral neuropathy in a cohort of children on ART. Methods In this cross-sectional study we included 182 children aged 5-15 years attending to healthcare facilities for ART collection in rural Mopani District, South Africa. Subjective and objective assessment of neuropathy was done using the NSS respectively NDS. These scores are feasible for resource-poor and skills-limited settings and only require a reflex hammer, cotton butt, tooth pick, and cold water. A definite diagnosis of peripheral neuropathy was defined by NSS≥3 or NDS≥ 2. Results Neuropathy screening was completed for 174/182 (96%) of children as 8 children did not fully cooperate. Median age was 9 years old and time on ART 2.0 years (2 months-6.4 years) with 86% on a stavudine-containing regimen. Symptoms related to neuropathy were reported by 49 children (27%) while NDS was positive for 25 children (14%). Forty-one (24%) of children fulfilled the criteria of peripheral neuropathy. Co-trimoxazole use was negatively associated with neuropathy presentation (OR 0.42, 95% CI 0.20–0.88; p=0.019) while there were tendencies for peripheral neuropathy to be associated with older age (p=0.09) and longer time on ART (p=0.06). Conclusion Peripheral neuropathy is a common condition in children collecting ART at healthcare facilities in rural Mopani District. The NSS and NDS can be used to screen for this condition in resource-poor settings., Background Antiretroviral (ARV) administration to HIV positive pregnant women and neonates reduces perinatal HIV transmission to less than 2% worldwide. However, concerns have been raised about potential toxicity in some neonates following gestational ARV exposure. Precise quantification of ARV exposure by history is difficult. Quantitative meconium analysis may better reflect fetal exposure during the third and perhaps second trimesters than history alone. Therefore, we developed and validated the first liquid chromatography-tandem mass spectrometry (LC-MS/MS) assay for ARVs and metabolites in meconium. Methods Blank meconium (0.25g) was fortified with 16 ARVs and 4 metabolites, chosen based on prevalence of use by HIV-infected mothers in the SMARTT (Surveillance Monitoring of ART Toxicities) Study of PHACS. Samples were homogenized in methanol and subjected to solid phase extraction prior to quantification by LC-MS/MS. Tenofovir (TDF), lamivudine (3TC), emtricitabine (FTC), abacavir (ABC) and its carboxylate (CABC) and glucuronide (GABC) metabolites, nevirapine (NVP), raltegravir (RAL), saquinavir (SQV), amprenavir (AMP), darunavir (DRV), atazanavir (ATV), ritonavir (RTV), lopinavir (LPV), nelfinavir (NFV) and its bioactive hydroxyl (M8) metabolite were quantified with positive ionization; stavudine (d4T), efavirenz (EFV), zidovudine (AZT) and its glucuronide (GAZT) metabolite were quantified with negative ionization. Results Chromatographic separation was achieved with gradient elution; two injections were required due to the need for both positive (35 min) and negative (18 min) ionization modes. Extraction efficiencies were greater than 60% for all analytes except GABC (30%), and TDF, 3TC, GAZT and CABC (50%). Linear calibration curves employing 1/x2 weighting ranged from 10–2500ng/g (TDF, FTC, ABC, GABC, NVP, RAL, SQV, ATV, RTV, LPV, NFV, and M8), 50–2500ng/g (3TC), 75–2500ng/g (CABC), 100–25,000ng/g (AMP, DRV, AZT, EFV) and 500–25,000ng/g (d4T, and GAZT). Conclusion We developed a selective and sensitive LC-MS/MS method to detect antiretroviral medications and metabolites in meconium, which may be useful in quantifying the in utero ARV exposure for children of HIV-infected women., Background Mechanisms for increased cardiovascular risk in HIV-infected adults are incompletely understood, but heighted inflammation leading to a pro-thrombotic state has been proposed as a major contributor. In vitro platelet aggregation has been studied as a robust biological marker of coronary events and mortality. Methods We studied platelet aggregation in 25 HIV-infected subjects on ART with undetectable plasma HIV-1 RNA, median CD4 537 cells/mm3 (73.9%men) and 29 healthy HIV seronegative controls (44.4%men) in response to submaximal adenosine diphosphate (ADP, 0.4uM), arachidonic acid (AA, 0.15mM), or without agonist (spontaneous platelet aggregation [SPA]). The effects of one week of aspirin 81mg daily on activation markers, as measured by flow cytometry, and platelet aggregation were investigated. Two-tailed paired t tests and non-parametric Mann-Whitney U test tests were used for statistical analyses, with results given as medians with interquatile ranges. Results Compared to controls, HIV subjects on ART had increased platelet aggregation in response to ADP (10.8% [6.5, 42.3] vs 7.6% [3.3, 10.2], p=0.02), AA (54.9% [8.7, 89.9] vs 11% [2.5, 77.6], p, Background Limited data exist regarding the relationship between dysfunctional HDL (dys-HDL) and the osteoprotegerin (OPG)/receptor activator of the NF-kB ligand (RANKL) in HIV infection. Oxidized HDL (dys-HDL) has been shown to activate the NF-kB pathway in vitro. In view of this observation and the important role of biomarkers of activation of the NF-kB pathway (RANKL/OPG axis) in systemic inflammatory conditions, we used a novel assay that measures oxidation of HDL to explore possible associations between dys-HDL with RANKL/OPG and parameters that may predict these biomarkers. Methods We used cryopreserved serum samples from a prospective study (A5078) where subjects were enrolled as risk factor-matched triads of HIV-infected subjects (n=55) and HIV-uninfected individuals (n=36). Relationships between HIV infection, RANKL, OPG, RANKL/OPG, and dys-HDL were assessed using Wilcoxon tests and mixed effects linear regression analysis. The baseline covariates considered in the analysis are shown in Table 1 and also included fasting glucose and lipids, insulin, use of statins, anthropometric parameters of obesity, years of protease inhibitors (PI) use, and nadir CD4+ T cells. Significant (p, Background The association of inflammatory biomarkers with clinical events after ART initiation is unclear. Methods A5202 randomized 1857 treatment-naive subjects to abacavir/lamivudine or tenofovir DF/emtricitabine with efavirenz or atazanavir/ritonavir. Substudy A5224s measured inflammatory biomarkers on all substudy subjects with available plasma from baseline and weeks 24 or 96. The association of hsCRP, IL-6, sTNF-RI, sTNF-RII, TNF-a, sVCAM-1, and sICAM-1 with times to AIDS and non-AIDS defining events was analyzed with Cox proportional hazards models, with adjustment by ART assignment, and HIV-1 RNA or CD4. Time-updated analyses used the most current value. Results Analysis included 244 subjects; 85% male, 48% white non-Hispanic, with median age 39 years, HIV-1 RNA 4.6 log10 copies/mL, and CD4 240 cells/µL. A total of 13 AIDS-defining events (9 opportunistic infections; 3 AIDS-cancers, 1 recurrent bacterial pneumonia) and 18 non-AIDS defining events (6 diabetes, 4 cancers, 3 cardiovascular, 5 pneumonias) occurred. Higher baseline IL-6, sTNF-RI, sTNF-RII, and sICAM-1 were significantly associated with increased risk of AIDS-defining events. Adjustment for baseline HIV-1 RNA did not change results, while adjusting for CD4 count left sTNF-RI and sICAM-1 significantly associated with increased AIDS-defining events risk. Time-updated values of these biomarkers were also associated with increased risk of AIDS-defining events, even after adjusting for ART assignment, baseline and changes in CD4 and HIV-1 RNA. For non-AIDS events, only baseline hsCRP was significantly associated with increased risk; after adjustment for baseline CD4 count, IL-6 became significantly associated with higher risk. Analyses of time-updated biomarker value showed TNF-a to be significantly associated with increased risk of non-AIDS-defining events, even after adjustment for ART, baseline and changes in CD4 and HIV-1 RNA.Table 1Baseline and Time-Updated Biomarker Association with AIDS-Defining Events Unadjusted Baseline CD4, NRTI and NNRTI/PI Adjusted Time-Updated CD4, NRTI and NNRTI/PI Adjusted Biomarker HR (95% CI) p-value HR (95% CI) p-value HR (95% CI) p-value Baseline hsCRP (per 1 log, ug/ml higher)1.21 (0.80, 1.83)0.361.26 (0.84, 1.88)0.26Time-updated hsCRP (per 1 log, ug/ml higher)1.17 (0.78, 1.77)0.441.17 (0.78, 1.75)0.441.18 (0.78, 1.76)0.43Baseline IL-6 (per l log, pg/ml higher)1.98 (1.06, 3.69)0.0321.79 (0.96, 3.34)0.066Time-updated IL-6 (per 1 log, pg/ml higher)2.06 (1.12, 3.77)0.0201.88 (1.02, 3.47)0.0421.92 (1.04, 3.55)0.037Baseline sICAM-1 (per 1 log, ng/ml higher)8.28 (1 93, 35.59)0.0046.13 (1.51, 24.78)0.011Time-updated sICAM-1 (per 1 log, ng/ml higher)4.45 (1.18, 16.68)0.0273.66 (1.03, 13.08)0.0463.55 (0.98, 13.56)0.053Baseline sTNF-RI (per 1 log, pg/ml higher)10.24 (2.08, 50.32)0.0046.25 (1.17, 33.36)0.032Time-updated sTNF Rl (per 1 log, pg/ml higher)18.14 (2.94, 112.01)0.00211.58 (1.81, 73.92)0.01012.83 (1.99, 82.59)0.007Baseline sTNF-RII (per 1 log, pg/ml higher)3.45 (1.28, 9.33)0.0152.89 (0.99, 8.46)0.052Time-updated sTNF-RII (per 1 log, pg/ml higher)3.51 (1.27, 9.67)0.0152.98 (1.03, 8.60)0.0443.03 (1.04, 8.79)0.041Baseline sVCAM 1 (per 1 log, ng/ml higher)2.29 (0.59, 8.92)0.231.92 (0.47, 7.75)0.36Time-updated sVCAM 1 (per 1 log, ng/ml higher)1.77 (0.41, 7.64)0.4515.9 (0.36, 6.98)0.541.47 (0.34, 6.43)0.51Baseline TNF-a (per 1 log, pg/ml higher)2.28 (0.67, 7.78)0.192.17 (0.61,7.79)0.23Time-updated TNF-a (per 1 log, pg/ml higher)1.94 (0.54, 6.98)0.311.78 (0.47, 6.74)0.401.76 (0.47, 6.62)0.40Biomarker Association with AIDS-Defining Events. Conclusion Higher levels of several inflammatory biomarkers were associated independently of CD4 count with increased risk of AIDS and non-AIDS events. Larger and longer studies should investigate the use of these markers as predictors of clinical endpoints.Table 2Baseline and Time-updated Biomarker Association with Non-AIDS-Defining Events Unadjusted Baseline CD4, NRTI and NNRTI/PI Adjusted Time-Updated CD4, NRTI and NNRTI/PI Adjusted Biomarker HR (95% CI) p-value HR (95% CI) p-value HR (95% CI) p-value Baseline hsCRP (per 1 log, ug/ml higher)1.66 (1.15, 2.41)0.0071.66 (1.14, 2.43)0.008Time-updated hsCRP (per 1 log, ug/ml higher)1.15 (0.81, 1.64)0.441.16 (0.81, 1.67)0.411.16 (0.81, 1.65)0.42Baseline IL-6 (per l log, pg/ml higher)1.68 (0.96, 2.93)0.0681.81 (1.01, 3.25)0.047Time-updated IL-6 (per 1 log, pg/ml higher)0.96 (0.51, 1.83)0.911.01 (0.53, 1.93)0.970.99 (0.52, 1.87)0.97Baseline sICAM-1 (per 1 log, ng/ml higher)0.81 (0.53, 1.24)0.330.79 (0.51, 1.22)0.28Time-updated sICAM-1 (per 1 log, ng/ml higher)0.89 (0.55, 1.44)0.640.88 (0.55, 1.42)0.610.89 (0.55, 1.44)0.65Baseline sTNF-RI (per 1 log, pg/ml higher)1.31 (0.24, 7.26)0.751.69 (0.27, 10.69)0.58Time-updated sTNF Rl (per 1 log, pg/ml higher)2.58 (0.34, 19.84)0.363.06 (0.36, 25.89)0.312.55 (0.31, 20.76)0.38Baseline sTNF-RII (per 1 log, pg/ml higher)1.66 (0.69, 4.01)0.261.98 (0.81, 4.87)0.14Time-updated sTNF-RII (per 1 log, pg/ml higher)2.07 (0.76, 5.61)0.152.32 (0.84, 6.40)0.112.14 (0.77, 5.97)0.15Baseline sVCAM 1 (per 1 log, ng/ml higher)1.03 (0.32, 3.32)0.951.16 (0.35, 3.85)0.81Time-updated sVCAM 1 (per 1 log, ng/ml higher)2.14 (0.60, 7.55)0.242.22 (0.62, 7.95)0.222.14 (0.59, 7.83)0.25Baseline TNF-a (per 1 log, pg/ml higher)2.33 (0.80, 6.76)0.122.35 (0.83, 6.66∣0.11Time-updated TNF-a (per 1 log, pg/ml higher)3.75 (1.31, 10.77)0.0144.01 (1.39, 11.55)0.0103.87 (1.34, 11.18)0.012Biomarker Association with NONAIDS-Defining Events., Background HIV-positive patients may be at increased risk of premature onset of age-associated non-communicable comorbidity (AANCC). Methods Comprehensive assessment for AANCC in an ongoing prospective cohort study of HIV-1-infected patients ≥45 years from a tertiary care HIV-outpatient clinic, and concurrently recruited HIV-uninfected public sexual health clinic-attendants, comparable regarding age, gender, ethnicity and risk-behavior. Baseline data on AANCC (blood pressure ≥140/90 mmHg, FEV1/FVC, Background The report of a successful HIV cure after allogeneic bone marrow transplant for acute leukemia has generated major interest in HIV eradication. We examined the efficacy, cost, and relapse rate combinations that would make ‘cure’ cost-effective compared with antiretroviral therapy (ART). Methods We used a Monte Carlo simulation of HIV disease (CEPAC model) to assess the impact of suppressive ART either continued indefinitely, or followed by one of three hypothetical strategies for HIV eradication: gene therapy (GeneRx), chemotherapy to activate the latent viral reservoir (Chemo), and an allogeneic bone marrow transplant (BMT). Patients eligible for inclusion in the model were virologically suppressed on first-line ART for one year. Patients who relapsed after a cure strategy restarted on ART. For each strategy we examined combination rates of cure, upfront cost, and monthly relapse rates to determine benchmarks for which the eradication strategies would compare favorably to ART. Model outcomes included projected life expectancy in months (LMs), cost, and discounted (3%) cost-effectiveness (C-E) in $US/QALY using a C-E threshold of
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- 2012
7. Low sensitivity of a urine LAM-ELISA in the diagnosis of pulmonary tuberculosis
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Huggett Jim F, Saad Eiman, Kroidl Inge, Minja Lilian T, Jung Jutta, Saathoff Elmar, Reither Klaus, Ntinginya Elias N, Maganga Lucas, Maboko Leonard, and Hoelscher Michael
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Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background The development and evaluation of rapid and accurate new diagnostic tools is essential to improve tuberculosis (TB) control in developing countries. In a previous study, the first release of a urine LAM-ELISA by Chemogen (Portland, USA) has been evaluated with a promising sensitivity and specificity for the diagnosis of pulmonary TB. In the present study, the now commercially available assay has been clinically assessed regarding its diagnostic value alone and in combination with clinical co-factors. Methods The test was applied to two urine samples from 291 consecutively enrolled Tanzanian patients with suspected pulmonary tuberculosis. The participants were subsequently assigned to classification groups according to microbiological, clinical and radiological findings at recruitment and during a maximum follow up period of 56 days. Results Only 35 out of 69 pulmonary TB cases -confirmed by smear microscopy and/or solid culture and/or liquid culture- showed at least one positive LAM-ELISA result (sensitivity 50.7%). The sensitivity was noticeably higher in females (66.7%) and in HIV positive participants (62.0%). The specificity amounted to 87.8% and was determined in participants with negative results in all microbiological tests and with sustained recovery under antibiotic treatment at day 56. Correlation with urinalysis revealed that proteinuria was significantly and positively associated with LAM-positivity (P = 0.026). Conclusion This commercially available generation of LAM-ELISA does not appear to be useful as an independent diagnostic test for pulmonary tuberculosis. The question whether the assay is suitable as a supplemental device in the diagnosis of HIV-associated TB, requires further investigations.
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- 2009
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8. Protein Dose-Sparing Effect of AS01B Adjuvant in a Randomized Preventive HIV Vaccine Trial of ALVAC-HIV (vCP2438) and Adjuvanted Bivalent Subtype C gp120.
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Chirenje ZM, Laher F, Dintwe O, Muyoyeta M, deCamp AC, He Z, Grunenberg N, Laher Omar F, Seaton KE, Polakowski L, Woodward Davis AS, Maganga L, Baden LR, Mayer K, Kalams S, Keefer M, Edupuganti S, Rodriguez B, Frank I, Scott H, Stranix-Chibanda L, Gurunathan S, Koutsoukos M, Van Der Meeren O, DiazGranados CA, Paez C, Andersen-Nissen E, Kublin J, Corey L, Ferrari G, Tomaras G, and McElrath MJ
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- Humans, Female, Adult, Male, Young Adult, Adolescent, Double-Blind Method, Squalene administration & dosage, Polysorbates administration & dosage, HIV-1 immunology, Viral Vaccines, Adjuvants, Immunologic administration & dosage, AIDS Vaccines immunology, AIDS Vaccines administration & dosage, AIDS Vaccines adverse effects, HIV Infections prevention & control, HIV Infections immunology, HIV Envelope Protein gp120 immunology, HIV Antibodies blood, HIV Antibodies immunology
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Background: HVTN 120 is a phase 1/2a randomized double-blind placebo-controlled human immunodeficiency virus (HIV) vaccine trial that evaluated the safety and immunogenicity of ALVAC-HIV (vCP2438) and MF59- or AS01B-adjuvanted bivalent subtype C gp120 Env protein at 2 dose levels in healthy HIV-uninfected adults., Methods: Participants received ALVAC-HIV (vCP2438) alone or placebo at months 0 and 1. At months 3 and 6, participants received either placebo, ALVAC-HIV (vCP2438) with 200 μg of bivalent subtype C gp120 adjuvanted with MF59 or AS01B, or ALVAC-HIV (vCP2438) with 40 μg of bivalent subtype C gp120 adjuvanted with AS01B. Primary outcomes were safety and immune responses., Results: We enrolled 160 participants, 55% women, 18-40 years old (median age 24 years) of whom 150 received vaccine and 10 placebo. Vaccines were generally safe and well tolerated. At months 6.5 and 12, CD4+ T-cell response rates and magnitudes were higher in the AS01B-adjuvanted groups than in the MF59-adjuvanted group. At month 12, HIV-specific Env-gp120 binding antibody response magnitudes in the 40 μg gp120/AS01B group were higher than in either of the 200 μg gp120 groups., Conclusions: The 40 μg dose gp120/AS01B regimen elicited the highest CD4+ T-cell and binding antibody responses. Clinical Trials Registration . NCT03122223., Competing Interests: Potential conflicts of interest. S. G. is an employee of Sanofi Pasteur and C. A. D. G. was employed by Sanofi Pasteur at the time of the study. M. Ko. and O. V. D. M. are employees of GSK and hold shares in GSK. All other authors report no potential conflicts. Funding to pay the Open Access publication charges for this article was provided by the NIH. All authors have submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Conflicts that the editors consider relevant to the content of the manuscript have been disclosed., (© The Author(s) 2023. Published by Oxford University Press on behalf of Infectious Diseases Society of America.)
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- 2024
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9. Epidemiology of alcohol use and alcohol use disorder among female sex workers in Mbeya City, Tanzania.
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Augustine AK, Maganga L, and Francis JM
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Alcohol misuse is a global concern, contributing to 5.3% of total deaths and 132.6 million disability-adjusted life years worldwide. In Sub-Saharan African countries, the prevalence of Alcohol Use Disorder (AUD) has risen, especially among female sex workers, due to increased availability and advertising. However, there are limited studies on alcohol use and AUD among female sex workers in Tanzania. This study aimed to determine the prevalence, patterns, and factors associated with alcohol use and AUD among sex workers in Mbeya city, Tanzania. In this cross-sectional study, 212 female sex workers in Mbeya city, Tanzania, seeking enrolment in the National Institute for Medical Research Mbeya Medical Research Centre's registration cohort from July to November 2022. Structured interviews covered socio-demographics, alcohol screening (AUDIT-C and Timeline Follow Back Calendar), and sexual behaviours data. Data were analysed using Stata version 17. Descriptive analysis assessed alcohol consumption and AUD prevalence. Factors associated with alcohol use and AUD at bivariate analysis were identified using Chi-square/Fisher's exact tests. All variables with p-value ≤ 0.20 were entered into a multivariable logistic regression model to identify factors associated with alcohol use and AUD. Among 212 participants, 86.6% reported alcohol use in the past 12 months, 85% in the past 30 days, and 98.5% met AUD criteria. Factors linked to recent alcohol consumption included primary education or higher, income above the median, and more than 10 sexual partners. Education level, marital status, income, and having dependents were significantly associated with heavy drinking episodes. The prevalence of AUD, alcohol use, and heavy episodic drinking were high among female sex workers in Mbeya city. Socio-demographic factors and risky sexual behaviours were associated with alcohol use and heavy episodic drinking highlighting the need for targeted interventions to combat alcohol abuse among female sex workers within the HIV program., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2024 Augustine et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
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- 2024
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10. Dynamics and durability of HIV-1 neutralization are determined by viral replication.
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Schommers P, Kim DS, Schlotz M, Kreer C, Eggeling R, Hake A, Stecher M, Park J, Radford CE, Dingens AS, Ercanoglu MS, Gruell H, Odidika S, Dahlhaus M, Gieselmann L, Ahmadov E, Lawong RY, Heger E, Knops E, Wyen C, Kümmerle T, Römer K, Scholten S, Wolf T, Stephan C, Suárez I, Raju N, Adhikari A, Esser S, Streeck H, Duerr R, Nanfack AJ, Zolla-Pazner S, Geldmacher C, Geisenberger O, Kroidl A, William W, Maganga L, Ntinginya NE, Georgiev IS, Vehreschild JJ, Hoelscher M, Fätkenheuer G, Lavinder JJ, Bloom JD, Seaman MS, Lehmann C, Pfeifer N, Georgiou G, and Klein F
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- Humans, HIV Antibodies, Antibodies, Neutralizing, Virus Replication, HIV-1, HIV Infections, AIDS Vaccines
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Human immunodeficiency virus type 1 (HIV-1)-neutralizing antibodies (nAbs) that prevent infection are the main goal of HIV vaccine discovery. But as no nAb-eliciting vaccines are yet available, only data from HIV-1 neutralizers-persons with HIV-1 who naturally develop broad and potent nAbs-can inform about the dynamics and durability of nAb responses in humans, knowledge which is crucial for the design of future HIV-1 vaccine regimens. To address this, we assessed HIV-1-neutralizing immunoglobulin G (IgG) from 2,354 persons with HIV-1 on or off antiretroviral therapy (ART). Infection with non-clade B viruses, CD4
+ T cell counts <200 µl-1 , being off ART and a longer time off ART were independent predictors of a more potent and broad neutralization. In longitudinal analyses, we found nAb half-lives of 9.3 and 16.9 years in individuals with no- or low-level viremia, respectively, and 4.0 years in persons who newly initiated ART. Finally, in a potent HIV-1 neutralizer, we identified lower fractions of serum nAbs and of nAb-encoding memory B cells after ART initiation, suggesting that a decreasing neutralizing serum activity after antigen withdrawal is due to lower levels of nAbs. These results collectively show that HIV-1-neutralizing responses can persist for several years, even at low antigen levels, suggesting that an HIV-1 vaccine may elicit a durable nAb response., (© 2023. The Author(s).)- Published
- 2023
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11. High-risk human papillomavirus genotype distribution among women living with and at risk for HIV in Africa.
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Chachage M, Parikh AP, Mahenge A, Bahemana E, Mnkai J, Mbuya W, Mcharo R, Maganga L, Mwamwaja J, Gervas R, Kibuuka H, Maswai J, Singoei V, Iroezindu M, Fasina A, Esber A, Dear N, Imbach M, Crowell TA, Hern J, Song X, Hoelscher M, Polyak CS, Ake JA, and Geldmacher C
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- Female, Humans, Risk Factors, Human Papillomavirus Viruses, Cohort Studies, Early Detection of Cancer, Kenya, Genotype, Papillomaviridae genetics, Prevalence, HIV Infections complications, Uterine Cervical Neoplasms diagnosis, Papillomavirus Infections complications
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Objective: Cervical cancer is a common preventable cancer among African women living with HIV (WLWH). Molecular diagnostics for high-risk human papillomavirus (HR-HPV) genotypes are standard components of cervical cancer screening in resource-rich countries but not in resource-limited settings. We evaluated HR-HPV genotypes among women with and without HIV in four African countries to inform cervical cancer preventive strategies., Methods: The African Cohort Study (AFRICOS) enrolled participants with and without HIV at 12 clinics in Tanzania, Kenya, Uganda, and Nigeria. Cervical cytobrush specimens from women were genotyped for 14 HR-HPV types using the multiplex Seegene Anyplex real-time PCR assay. Robust Poisson regression was used to estimate relative risks (RRs) and 95% confidence intervals (CIs) for factors associated with HR-HPV in WLWH., Results: From January 2015 to March 2020, 868 WLWH and 134 women living without HIV (WLWoH) were tested for HR-HPV with prevalence of 50.9 and 38.1%, respectively ( P = 0.007). Among WLWH, 844 (97.4%) were antiretroviral therapy (ART)-experienced and 772 (89.7%) virally suppressed 1000 copies/ml or less. The most frequent HR-HPV types among WLWH were HPV-16 (13.5%), HPV-52 (9.5%), and HPV-35 (9.3%). HR-HPV infection was more common among Tanzanian WLWH (adjusted RR: 1.23, 95% CI 1.05-1.44, P = 0.012). Also, WLWH with CD4 + T cells of less than 200 cell/μl had 1.51-fold increased risk of having HR-HPV (95% CI 1.23-1.86, P < 0.001)., Conclusion: HR-HPV was common in WLWH in four African countries, particularly among women with low CD4 + cell count. Scale up of HPV vaccines and development of vaccines with broader activity against less common HR-HPV types may improve cervical cancer prevention in Africa., (Copyright © 2022 The Author(s). Published by Wolters Kluwer Health, Inc.)
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- 2023
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12. Increased HIV Incidence in Wuchereria bancrofti Microfilaria Positive Individuals in Tanzania.
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Mnkai J, Ritter M, Maganga L, Maboko L, Olomi W, Clowes P, Minich J, Lelo AE, Kariuki D, Debrah AY, Geldmacher C, Hoelscher M, Saathoff E, Chachage M, Pfarr K, Hoerauf A, and Kroidl I
- Abstract
Background: Infections with Wuchereria bancrofti are associated with reduced immunity against concomitant infections. Indeed, our previous study described a 2.3-fold increased HIV incidence among individuals with W. bancrofti infection, as measured by the circulating filarial antigen of the adult worm. This new study aimed to retrospectively determine microfilariae status of the participants to assess if the previously described increased HIV susceptibility was associated with the presence of MF in the same cohort., Methods: CFA positive but HIV negative biobanked human blood samples ( n = 350) were analyzed for W. bancrofti MF chitinase using real time PCR., Results: The PCR provided a positive signal in 12/350 (3.4%) samples. During four years of follow-up (1109 person years (PY)), 22 study participants acquired an HIV infection. In 39 PY of W. bancrofti MF chitinase positive individuals, three new HIV infections occurred (7.8 cases per 100 PY), in contrast to 19 seroconversions in 1070 PY of W. bancrofti MF chitinase negative individuals (1.8 cases per 100 PY, p = 0.014)., Conclusions: In the subgroup of MF-producing Wb-infected individuals, the HIV incidence exceeded the previously described moderate increased risk for HIV seen in all Wb-infected individuals (regardless of MF status) compared with uninfected persons from the same area.
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- 2023
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13. Systematic comparison of HIV-1 Envelope-specific IgG responses induced by different vaccination regimens: Can we steer IgG recognition towards regions of viral vulnerability?
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Horvath A, Rogers L, Pollakis G, Baranov O, Pieroth N, Joseph S, Chachage M, Heitzer A, Maganga L, Msafiri F, Joachim A, Viegas E, Eller LA, Kibuuka H, Rerks-Ngarm S, Pitisuttithum P, Nitayapan S, Dhitavat J, Premsri N, Fidler S, Shattock RJ, Robb ML, Weber J, McCormack S, Munseri PJ, Lyamuya E, Nilsson C, Kroidl A, Hoelscher M, Wagner R, Geldmacher C, and Held K
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- Humans, HIV Antibodies, Vaccination, Epitopes, Immunoglobulin G, HIV Infections prevention & control, HIV-1
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Immunogens and vaccination regimens can influence patterns of immune-epitope recognition, steering them towards or away from epitopes of potential viral vulnerability. HIV-1 envelope (Env)-specific antibodies targeting variable region 2 (V2) or 3 (V3) correlated with protection during the RV144 trial, however, it was suggested that the immunodominant V3 region might divert antibody responses away from other relevant sites. We mapped IgG responses against linear Env epitopes in five clinical HIV vaccine trials, revealing a specific pattern of Env targeting for each regimen. Notable V2 responses were only induced in trials administering CRF01_AE based immunogens, but targeting of V3 was seen in all trials, with the soluble, trimeric CN54gp140 protein eliciting robust V3 recognition. Strong V3 targeting was linked to greater overall response, increased number of total recognised antigenic regions, and where present, stronger V2 recognition. Hence, strong induction of V3-specific antibodies did not negatively impact the targeting of other linear epitopes in this study, suggesting that the induction of antibodies against V3 and other regions of potential viral vulnerability need not be necessarily mutually exclusive., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Horvath, Rogers, Pollakis, Baranov, Pieroth, Joseph, Chachage, Heitzer, Maganga, Msafiri, Joachim, Viegas, Eller, Kibuuka, Rerks-Ngarm, Pitisuttithum, Nitayapan, Dhitavat, Premsri, Fidler, Shattock, Robb, Weber, McCormack, Munseri, Lyamuya, Nilsson, Kroidl, Hoelscher, Wagner, Geldmacher and Held.)
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- 2023
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14. Dissecting drivers of immune activation in chronic HIV-1 infection.
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Streeck H, Maestri A, Habermann D, Crowell TA, Esber AL, Son G, Eller LA, Eller MA, Parikh AP, Horn PA, Maganga L, Bahemana E, Adamu Y, Kiweewa F, Maswai J, Owuoth J, Robb ML, Michael NL, Polyak CS, Hoffmann D, and Ake JA
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- Cohort Studies, Female, Humans, Male, Viremia drug therapy, Anti-HIV Agents therapeutic use, HIV Infections, HIV-1
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Background: Immune activation is a significant contributor to HIV pathogenesis and disease progression. In virally-suppressed individuals on ART, low-level immune activation has been linked to several non-infectious comorbid diseases. However, studies have not been systematically performed in sub-Saharan Africa and thus the impact of demographics, ART and regional endemic co-infections on immune activation is not known. We therefore comprehensively evaluated in a large multinational African cohort markers for immune activation and its distribution in various settings., Methods: 2747 specimens from 2240 people living with HIV (PLWH) and 477 without HIV from the observational African Cohort Study (AFRICOS) were analyzed for 13 immune parameters. Samples were collected along with medical history, sociodemographic and comorbidity data at 12 HIV clinics across 5 programs in Uganda, Kenya, Tanzania and Nigeria. Data were analyzed with univariate and multivariate methods such as random forests and principal component analysis., Findings: Immune activation was markedly different between PLWH with detectable viral loads, and individuals without HIV across sites. Among viremic PLWH, we found that all immune parameters were significantly correlated with viral load except for IFN-α. The overall inflammatory profile was distinct between men and women living with HIV, in individuals off ART and with HIV viremia. We observed stronger differences in the immune activation profile with increasing viremia. Using machine learning methods, we found that geographic differences contributed to unique inflammatory profiles. We also found that among PLWH, age and the presence of infectious and/or noninfectious comorbidities showed distinct inflammatory patterns, and biomarkers may be used to predict the presence of some comorbidities., Interpretation: Our findings show that chronic immune activation in HIV-1 infection is influenced by HIV viral load, sex, age, region and ART use. These predictors, as well as associations among some biomarkers and coinfections, influence biomarkers associated with noncommunicable diseases., Funding: This work was supported by the President's Emergency Plan for AIDS Relief via a cooperative agreement between the Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., and the U.S. Department of Defense [W81XWH-11-2-0174, W81XWH-18-2-0040]. The investigators have adhered to the policies for protection of human subjects as prescribed in AR 70-25. This article was prepared while Michael A. Eller was employed at Henry M. Jackson Foundation for the Advancement of Military Medicine for the U.S. Military HIV Research Program. The views expressed are those of the authors and should not be construed to represent the positions of the US Army or the Department of Defense. The opinions expressed in this article are the author's own, and do not reflect the view of the National Institutes of Health, the U.S. Department of Health and Human Services, or the U.S. government., Competing Interests: Declaration of interests All authors declare no conflicts of interest., (Copyright © 2022 The Author(s). Published by Elsevier B.V. All rights reserved.)
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- 2022
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15. HIV testing and linkage to care-A case of a mobile diagnostic and counseling service in Mbeya, Tanzania; A quantitative study.
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Kway A, Sabi I, Olomi W, Mcharo RD, Sanga E, William W, Chimbe O, Ntinginya NE, and Maganga L
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HIV-care programmes are faced with significant challenges in getting newly diagnosed People Living with Human Immunodeficiency Virus (PLHIV) linked to care despite massive investment in HIV prevention, treatment and care. This study assessed the performance of mobile HIV Testing and Counseling service (mHTC) in provision of HIV-testing and linkage to care of newly diagnosed PLHIV from Key and Vulnerable Populations (KVPs). A retrospective review of the records of 25,248 clients was extracted from the mHTC database from October-2016 to September-2018. Of 25,248 clients, 51.71% were in 25-45 years age group, 55.4% were males, 60.5% were married and 62.1% had primary level of education. The median age of clients was 31 (IQR: 23-42) years. Out of the clients tested, 800 (3.17%) were diagnosed HIV-positive. Positivity was high among females 450 (4%), age group 25-45 years 538 (4.12%), divorced 202 (7.41%) and clients with primary level of education 504 (3.21%). An association between HIV status and sex, age group, relationship status and level of education was observed (P<0001). Out of the 800 HIV-positive clients, 418 (52.30%) were successfully linked to care. Among the positive clients, 5/6 (83.33%) children below 15 years old, 238/450 (52.89%) females and 39/64 (60.94%) widows were successfully linked to care. In the multivariable log binomial regression model age of the clients was associated with successful linkage to care. The mHTC was able to reach KVP clients; overall linkage for both sexes was 52.30% below the recommended UNAIDS 90-90-90 target. Raising the need to address the challenges associated with linkage and specific care for KVPs as a subset of the general population. The mHTC has shown that it is feasible to improve the reach of KVP clients; however, further research is required to examine the quality of this service at the community level., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2022 Kway et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
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- 2022
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16. Step towards elimination of Wuchereria bancrofti in Southwest Tanzania 10 years after mass drug administration with Albendazole and Ivermectin.
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Mnkai J, Marandu TF, Mhidze J, Urio A, Maganga L, Haule A, Kavishe G, Ntapara E, Chiwerengo N, Clowes P, Horn S, Mosoba M, Lazarus W, Ngenya A, Kalinga A, Debrah A, Rieß F, Saathoff E, Geldmacher C, Hoerauf A, Hoelscher M, Chachage M, and Kroidl I
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- Albendazole adverse effects, Animals, Antigens, Helminth therapeutic use, Follow-Up Studies, Humans, Ivermectin adverse effects, Male, Mass Drug Administration, Tanzania epidemiology, Wuchereria bancrofti, Elephantiasis, Filarial drug therapy, Elephantiasis, Filarial epidemiology, Elephantiasis, Filarial prevention & control, Filaricides therapeutic use
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Background: Lymphatic filariasis is a mosquito transmitted parasitic infection in tropical regions. Annual mass treatment with ivermectin and albendazole is used for transmission control of Wuchereria bancrofti, the infective agent of lymphatic filariasis in many African countries, including Tanzania., Methodology: In a general population study in Southwest Tanzania, individuals were tested for circulating filarial antigen, an indicator of W. bancrofti adult worm burden in 2009 before mass drug administration commenced in that area. Seven annual rounds with ivermectin and albendazole were given between 2009 and 2015 with a population coverage of over 70%. Participants of the previous study took part in a follow-up activity in 2019 to measure the effect of this governmental activity., Findings: One thousand two hundred and ninety nine inhabitants of Kyela district in Southwest Tanzania aged 14 to 65 years who had participated in the study activities in 2009 were revisited in 2010/11 and 2019. Among this group, the prevalence of lymphatic filariasis of the 14-65 years olds in 2009 was 35.1%. A follow-up evaluation in 2010/11 had shown a reduction to 27.7%. In 2019, after 7 years of annual treatment and an additional three years of surveillance, the prevalence had dropped to 1.7%, demonstrating successful treatment by the national control programme. Risk factors for W. bancrofti-infection were the occupation as farmer, male sex, and older age. Most infected individuals in the 2019 follow-up study already had a positive test for filarial antigen in 2009 and/or 2010/11., Conclusions: This data supports the findings of the Tanzanian Neglected Tropical Disease Control Programme (NTDCP), who conducted Transmission Assessment Surveys and found an impressive reduction in the prevalence of LF in children. Our results complement this data by showing a similar decrease in prevalence of LF in the adult population in the same area. The elimination of LF seems achievable in the near future., Competing Interests: The authors have declared that no competing interests exist.
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- 2022
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17. Clinical similarities and differences between two large HIV cohorts in the United States and Africa.
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Monroe AK, Polyak CS, Castel AD, Esber AL, Byrne ME, Maswai J, Owuoth J, Maganga L, Bahemana E, Adamu Y, Iroezindu M, Kibuuka H, Kiweewa F, Greenberg AE, Crowell TA, and Ake JA
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- Adult, Cohort Studies, Female, Humans, Kenya, Middle Aged, Retrospective Studies, United States epidemiology, Coinfection, HIV Infections drug therapy, HIV Infections epidemiology
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Background: Washington, DC, and sub-Saharan Africa are both affected by generalized HIV epidemics. However, care for persons living with HIV (PLWH) and clinical outcomes may differ in these geographically and culturally diverse areas. We compared patient and clinical site characteristics among adult persons living with HIV (PLWH) enrolled in two longitudinal HIV cohort studies-the African Cohort Study (AFRICOS) and the DC Cohort., Methods: The DC Cohort is a clinic-based city-wide longitudinal cohort comprised of PLWH attending 15 HIV clinics in Washington, DC. Patients' socio-demographic characteristics, clinical evaluations, and laboratory data are retrospectively collected from electronic medical records and limited manual chart abstraction. AFRICOS is a prospective observational cohort of PLWH and uninfected volunteers attending 12 select HIV care and treatment facilities in Nigeria, Kenya, Uganda and Tanzania. AFRICOS study participants are a subset of clinic patients who complete protocol-specific visits every 6 months with history and physical examination, questionnaire administration, and blood/sputum collection for ascertainment of HIV outcomes and comorbidities, and neurocognitive and functional assessments. Among participants aged ≥ 18 years, we generated descriptive statistics for demographic and clinical characteristics at enrollment and follow up and compared them using bivariable analyses., Results: The study sample included 2,774 AFRICOS and 8,420 DC Cohort participants who enrolled from January 2013 (AFRICOS)/January 2011 (DC Cohort) through March 2018. AFRICOS participants were significantly more likely to be women (58.8% vs 27.1%) and younger (83.3% vs 61.1% aged < 50 years old) and significantly less likely to be MSM (only 0.1% of AFRICOS population reported MSM risk factor) than DC Cohort. Similar rates of current viral suppression (about 75% of both samples), hypertension, hepatitis B coinfection and alcohol use were observed. However, AFRICOS participants had significantly higher rates of CD4<200 and tuberculosis and significantly lower rates of obesity, DM, hepatitis C coinfection and syphilis., Conclusions: With similar viral suppression outcomes, but many differences between our cohorts noted, the combined sample provides unique opportunities to assess and compare HIV care and treatment outcomes in the U.S. and sub-Saharan Africa. Comparing these two cohorts may inform care and treatment practices and may pave the way for future pathophysiologic analyses., Competing Interests: The authors have declared that no competing interests exist.
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- 2022
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18. HIV-1 infections with multiple founders associate with the development of neutralization breadth.
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Lewitus E, Townsley SM, Li Y, Donofrio GC, Dearlove BL, Bai H, Sanders-Buell E, O'Sullivan AM, Bose M, Kibuuka H, Maganga L, Nitayaphan S, Sawe FK, Eller LA, Michael NL, Polonis VR, Ake JA, Vasan S, Robb ML, Tovanabutra S, Krebs SJ, and Rolland M
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- Antibodies, Neutralizing, Epitopes, HIV Antibodies, Humans, Prospective Studies, env Gene Products, Human Immunodeficiency Virus genetics, HIV-1 genetics
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Eliciting broadly neutralizing antibodies (bnAbs) is a cornerstone of HIV-1 vaccine strategies. Comparing HIV-1 envelope (env) sequences from the first weeks of infection to the breadth of antibody responses observed several years after infection can help define viral features critical to vaccine design. We investigated the relationship between HIV-1 env genetics and the development of neutralization breadth in 70 individuals enrolled in a prospective acute HIV-1 cohort. Half of the individuals who developed bnAbs were infected with multiple HIV-1 founder variants, whereas all individuals with limited neutralization breadth had been infected with single HIV-1 founders. Accordingly, at HIV-1 diagnosis, env diversity was significantly higher in participants who later developed bnAbs compared to those with limited breadth (p = 0.012). This association between founder multiplicity and the subsequent development of neutralization breadth was also observed in 56 placebo recipients in the RV144 vaccine efficacy trial. In addition, we found no evidence that neutralization breath was heritable when analyzing env sequences from the 126 participants. These results demonstrate that the presence of slightly different HIV-1 variants in acute infection could promote the induction of bnAbs, suggesting a novel vaccine strategy, whereby an initial immunization with a cocktail of minimally distant antigens would be able to initiate bnAb development towards breadth., Competing Interests: The authors have declared that no competing interests exist.
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- 2022
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19. Clinical signs and symptoms associated with acute HIV infection from an intensely monitored cohort on 2 continents.
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Letizia AG, Eller LA, Bryant C, Dawson P, Nitayaphan S, Kosgei J, Kibuuka H, Maganga L, Kroon E, Sriplienchan S, Michael NL, O'Connell RJ, Kim JH, and Robb ML
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- Algorithms, Cohort Studies, Female, Humans, Kenya epidemiology, Male, Risk Factors, Sensitivity and Specificity, Tanzania epidemiology, Thailand epidemiology, Uganda epidemiology, HIV Infections complications, HIV Infections diagnosis, HIV Infections epidemiology
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Abstract: Define the clinical presentation of acute human immunodeficiency virus infection (AHI) among men and women from 2 continents to create a clinical scoring algorithm.Comparison of incident sign and symptom between those with and without AHI.At-risk human immunodeficiency virus (HIV) negative men and women in Thailand, Kenya, Tanzania, and Uganda underwent twice-weekly testing for HIV. Newly diagnosed participants were evaluated twice weekly for 21 days after infection.Of the 3345 participants enrolled, 56 African females and 36 biological males from Thailand were diagnosed with AHI. Four hundred fifty-two of their encounters were compared to 18,281 HIV negative encounters. Due to a high degree of heterogeneity among incident symptoms, 2 unique subgroups based upon geography and sex were created. Among Thai males, the signs and symptoms with the greatest odds ratio (OR) between AHI and uninfected participants were nausea (OR 16.0, 95% confidence interval [CI] 3.9-60.2, P < .001) and lymphatic abnormalities (OR 11.8, 95% CI 4.2-49.0, P < .001); and among African females were pain behind the eyes (OR 44.4, 95% CI 12.0-158.0, P < .0001) and fatigue (OR 22.7, 95% CI 11.3-44.3, P < .001). The Thai male scoring algorithm had a 66% sensitivity and 84% specificity while the African female algorithm had a sensitivity of 27% and specificity of 98%.The different incident symptoms during AHI necessitated creating 2 different scoring algorithms that can guide diagnostic testing among a particular sex in the appropriate geographic setting. Further research on risk exposure, sex, and demographic specific models is warranted., Competing Interests: The authors have no conflicts of interest to disclose., (Copyright © 2022 the Author(s). Published by Wolters Kluwer Health, Inc.)
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- 2022
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20. Clinical factors and outcomes associated with immune non-response among virally suppressed adults with HIV from Africa and the United States.
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Noiman A, Esber A, Wang X, Bahemana E, Adamu Y, Iroezindu M, Kiweewa F, Maswai J, Owuoth J, Maganga L, Ganesan A, Maves RC, Lalani T, Colombo RE, Okulicz JF, Polyak C, Crowell TA, Ake JA, and Agan BK
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- Adult, Africa epidemiology, Anti-Retroviral Agents therapeutic use, Female, HIV Infections drug therapy, HIV Infections epidemiology, Humans, Longitudinal Studies, Male, United States epidemiology, HIV Infections immunology
- Abstract
A significant minority of people living with HIV (PLWH) achieve viral suppression (VS) on antiretroviral therapy (ART) but do not regain healthy CD4 counts. Clinical factors affecting this immune non-response (INR) and its effect on incident serious non-AIDS events (SNAEs) have been challenging to understand due to confounders that are difficult to control in many study settings. The U.S. Military HIV Natural History Study (NHS) and African Cohort Study (AFRICOS). PLWH with sustained VS (< 400 copies/ml for at least two years) were evaluated for INR (CD4 < 350 cells/µl at the time of sustained VS). Logistic regression estimated adjusted odds ratios (aORs) and 95% confidence intervals (CIs) for factors associated with INR. Cox proportional hazards regression produced adjusted hazard ratios (aHRs) for factors associated with incident SNAE after sustained VS. INR prevalence was 10.8% and 25.8% in NHS and AFRICOS, respectively. Higher CD4 nadir was associated with decreased odds of INR (aOR = 0.34 [95% CI 0.29, 0.40] and aOR = 0.48 [95% CI 0.40, 0.57] per 100 cells/µl in NHS and AFRICOS, respectively). After adjustment, INR was associated with a 61% increase in relative risk of SNAE [95% CI 1.12, 2.33]. Probability of "SNAE-free" survival at 15 years since sustained VS was approximately 20% lower comparing those with and without INR; nearly equal to the differences observed by 15-year age groups. CD4 monitoring before and after VS is achieved can help identify PLWH at risk for INR. INR may be a useful clinical indicator of future risk for SNAEs., (© 2022. The Author(s).)
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- 2022
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21. Perceived satisfaction with HIV care and its association with adherence to antiretroviral therapy and viral suppression in the African Cohort Study.
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Somi N, Dear N, Reed D, Parikh A, Lwilla A, Bahemana E, Khamadi S, Iroezindu M, Kibuuka H, Maswai J, Crowell TA, Owuoth J, Maganga L, Polyak C, Ake J, and Esber A
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- Cohort Studies, Humans, Medication Adherence, Personal Satisfaction, Viral Load, Anti-HIV Agents therapeutic use, HIV Infections drug therapy, HIV Infections epidemiology
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Background: Increased availability of HIV care over the past decade has dramatically reduced morbidity and mortality among people living with HIV (PLWH) in sub-Saharan Africa. However, perceived and experienced barriers to care, including dissatisfaction with services, may impact adherence and viral suppression. We examined the associations between satisfaction with HIV care and antiretroviral therapy (ART) adherence and viral load suppression., Methods: The African Cohort Study (AFRICOS) is a prospective observational study conducted at PEPFAR-supported clinics in four African countries. At enrollment and twice-yearly study visits, participants received a clinical assessment and a socio-behavioral questionnaire was administered. Participants were classified as dissatisfied with care if they reported dissatisfaction with any of the following: waiting time, health care worker skills, health care worker attitudes, quality of clinic building, or overall quality of care received. Robust Poisson regression was used to estimate prevalence ratios and 95% confidence intervals (CIs) for associations between satisfaction with care and ART adherence and between satisfaction with care and viral suppression (viral load < 1000 copies/mL)., Results: As of 1 March 2020, 2928 PLWH were enrolled and 2311 had a year of follow-up visits. At the first annual follow-up visit, 2309 participants responded to questions regarding satisfaction with quality of care, and 2069 (89.6%) reported satisfaction with care. Dissatisfaction with waiting time was reported by 177 (7.6%), building quality by 59 (2.6%), overall quality of care by 18 (0.8%), health care worker attitudes by 16 (0.7%), and health care worker skills by 15 (0.7%). After adjusting for age and site, there was no significant difference in viral suppression between those who were satisfied with care and those who were dissatisfied (aPR: 1.03, 95% CI 0.97-1.09). Satisfaction with HIV care was moderately associated with ART adherence among AFRICOS participants (aPR: 1.09; 95% CI 1.00-1.16)., Conclusions: While patient satisfaction in AFRICOS was high and the association between perceived quality of care and adherence to ART was marginal, we did identify potential target areas for HIV care improvement, including reducing clinic waiting times., (© 2021. The Author(s).)
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- 2021
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22. Limited Evidence for a Relationship between HIV-1 Glycan Shield Features in Early Infection and the Development of Neutralization Breadth.
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Li Y, Bai H, Sanders-Buell E, Dussupt V, Townsley S, Donofrio G, Bose M, O'Sullivan AM, Kibuuka H, Maganga L, Nitayaphan S, Kosgei J, Pitisuttithum P, Rerks-Ngarm S, Eller LA, Michael NL, Robb ML, Ake J, Vasan S, Tovanabutra S, Krebs SJ, and Rolland M
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- Africa, Eastern epidemiology, Antibodies, Neutralizing blood, Cohort Studies, Epitopes, Glycosylation, HIV Antibodies blood, HIV Infections immunology, HIV Infections virology, Humans, Thailand epidemiology, Antibodies, Neutralizing immunology, HIV Antibodies immunology, HIV Infections epidemiology, HIV-1 immunology, Immune Evasion immunology, Polysaccharides immunology, env Gene Products, Human Immunodeficiency Virus immunology
- Abstract
Identifying whether viral features present in acute HIV-1 infection predetermine the development of neutralization breadth is critical to vaccine design. Incorporating such features in vaccine antigens could initiate cross-reactive antibody responses that could sufficiently protect vaccinees from HIV-1 infection despite the uniqueness of each founder virus. To understand the relationship between Env determinants and the development of neutralization breadth, we focused on 197 individuals enrolled in two cohorts in Thailand and East Africa (RV144 and RV217) and followed since their diagnosis in acute or early HIV-1 infection. We analyzed the distribution of variable loop lengths and glycans, as well as the predicted density of the glycan shield, and compared these envelope features to the neutralization breadth data obtained 3 years after infection ( n = 121). Our study revealed limited evidence for glycan shield features that associate with the development of neutralization breadth. While the glycan shield tended to be denser in participants who subsequently developed breadth, no significant relationship was found between the size of glycan holes and the development of neutralization breadth. The parallel analysis of 3,000 independent Env sequences showed no evidence of directional evolution of glycan shield features since the beginning of the epidemic. Together, our results highlight that glycan shield features in acute and early HIV-1 infection may not play a role determinant enough to dictate the development of neutralization breadth and instead suggest that the glycan shield's reactive properties that are associated with immune evasion may have a greater impact. IMPORTANCE A major goal of HIV-1 vaccine research is to design vaccine candidates that elicit potent broadly neutralizing antibodies (bNAbs). Different viral features have been associated with the development of bNAbs, including the glycan shield on the surface of the HIV-1 Envelope (Env). Here, we analyzed data from two cohorts of individuals who were followed from early infection to several years after infection spanning multiple HIV-1 subtypes. We compared Env glycan features in HIV-1 sequences obtained in early infection to the potency and breadth of neutralizing antibodies measured 1 to 3 years after infection. We found limited evidence of glycan shield properties that associate with the development of neutralization breadth in these cohorts. These results may have important implications for antigen design in future vaccine strategies and emphasize that HIV-1 vaccines will need to rely on a complex set of properties to elicit neutralization breadth.
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- 2021
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23. Factors influencing estimates of HIV-1 infection timing using BEAST.
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Dearlove B, Tovanabutra S, Owen CL, Lewitus E, Li Y, Sanders-Buell E, Bose M, O'Sullivan AM, Kijak G, Miller S, Poltavee K, Lee J, Bonar L, Harbolick E, Ahani B, Pham P, Kibuuka H, Maganga L, Nitayaphan S, Sawe FK, Kim JH, Eller LA, Vasan S, Gramzinski R, Michael NL, Robb ML, and Rolland M
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- Bayes Theorem, Cohort Studies, Computational Biology, Female, Genes, Viral, Genetic Variation, HIV Infections diagnosis, HIV Infections virology, Humans, Likelihood Functions, Longitudinal Studies, Male, Models, Genetic, Phylogeny, Time Factors, HIV Infections epidemiology, HIV-1 genetics, HIV-1 isolation & purification, Models, Biological, Software
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While large datasets of HIV-1 sequences are increasingly being generated, many studies rely on a single gene or fragment of the genome and few comparative studies across genes have been done. We performed genome-based and gene-specific Bayesian phylogenetic analyses to investigate how certain factors impact estimates of the infection dates in an acute HIV-1 infection cohort, RV217. In this cohort, HIV-1 diagnosis corresponded to the first RNA positive test and occurred a median of four days after the last negative test, allowing us to compare timing estimates using BEAST to a narrow window of infection. We analyzed HIV-1 sequences sampled one week, one month and six months after HIV-1 diagnosis in 39 individuals. We found that shared diversity and temporal signal was limited in acute infection, and insufficient to allow timing inferences in the shortest HIV-1 genes, thus dated phylogenies were primarily analyzed for env, gag, pol and near full-length genomes. There was no one best-fitting model across participants and genes, though relaxed molecular clocks (73% of best-fitting models) and the Bayesian skyline (49%) tended to be favored. For infections with single founders, the infection date was estimated to be around one week pre-diagnosis for env (IQR: 3-9 days) and gag (IQR: 5-9 days), whilst the genome placed it at a median of 10 days (IQR: 4-19). Multiply-founded infections proved problematic to date. Our ability to compare timing inferences to precise estimates of HIV-1 infection (within a week) highlights that molecular dating methods can be applied to within-host datasets from early infection. Nonetheless, our results also suggest caution when using uniform clock and population models or short genes with limited information content., Competing Interests: The authors have declared that no competing interests exist.
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- 2021
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24. Phase 1 Human Immunodeficiency Virus (HIV) Vaccine Trial to Evaluate the Safety and Immunogenicity of HIV Subtype C DNA and MF59-Adjuvanted Subtype C Envelope Protein.
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Hosseinipour MC, Innes C, Naidoo S, Mann P, Hutter J, Ramjee G, Sebe M, Maganga L, Herce ME, deCamp AC, Marshall K, Dintwe O, Andersen-Nissen E, Tomaras GD, Mkhize N, Morris L, Jensen R, Miner MD, Pantaleo G, Ding S, Van Der Meeren O, Barnett SW, McElrath MJ, Corey L, and Kublin JG
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- Adult, DNA, HIV Antibodies, Humans, Immunization, Secondary, Immunogenicity, Vaccine, Polysorbates, South Africa, Squalene, Tanzania, Zambia, AIDS Vaccines therapeutic use, HIV Infections prevention & control, HIV-1 genetics
- Abstract
Background: The Pox-Protein Public-Private Partnership is performing a suite of trials to evaluate the bivalent subtype C envelope protein (TV1.C and 1086.C glycoprotein 120) vaccine in the context of different adjuvants and priming agents for human immunodeficiency virus (HIV) type 1 (HIV-1) prevention., Methods: In the HIV Vaccine Trials Network 111 trial, we compared the safety and immunogenicity of DNA prime followed by DNA/protein boost with DNA/protein coadministration injected intramuscularly via either needle/syringe or a needle-free injection device (Biojector). One hundred thirty-two healthy, HIV-1-uninfected adults were enrolled from Zambia, South Africa, and Tanzania and were randomized to 1 of 6 arms: DNA prime, protein boost by needle/syringe; DNA and protein coadministration by needle/syringe; placebo by needle/syringe; DNA prime, protein boost with DNA given by Biojector; DNA and protein coadministration with DNA given by Biojector; and placebo by Biojector., Results: All vaccinations were safe and well tolerated. DNA and protein coadministration was associated with increased HIV-1 V1/V2 antibody response rate, a known correlate of decreased HIV-1 infection risk. DNA administration by Biojector elicited significantly higher CD4+ T-cell response rates to HIV envelope protein than administration by needle/syringe in the prime/boost regimen (85.7% vs 55.6%; P = .02), but not in the coadministration regimen (43.3% vs 48.3%; P = .61)., Conclusions: Both the prime/boost and coadministration regimens are safe and may be promising for advancement into efficacy trials depending on whether cellular or humoral responses are desired., Clinical Trials Registration: South African National Clinical Trials Registry (application 3947; Department of Health [DoH] no. DOH-27-0715-4917) and ClinicalTrials.gov (NCT02997969)., (© The Author(s) 2020. Published by Oxford University Press for the Infectious Diseases Society of America.)
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- 2021
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25. Impact of age on CD4 recovery and viral suppression over time among adults living with HIV who initiated antiretroviral therapy in the African Cohort Study.
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Bahemana E, Esber A, Dear N, Ganesan K, Parikh A, Reed D, Maganga L, Khamadi S, Mizinduko M, Lwilla A, Mkondoo D, Mwaisanga G, Somi N, Owouth J, Maswai J, Kiweewa F, Iroezindu M, Ake JA, Crowell TA, Valcour VG, and Polyak CS
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- Adult, Aged, CD4 Lymphocyte Count, Cohort Studies, Humans, Kenya, Middle Aged, Viral Load, Anti-HIV Agents therapeutic use, HIV Infections drug therapy, HIV Infections epidemiology
- Abstract
Introduction: With increased use of antiretroviral therapy (ART), HIV mortality rates are declining and people living with HIV (PLWH) are surviving longer. We characterized CD4 recovery and viral suppression among adults aged < 50 and ≥ 50 years living with HIV who initiated ART in the African Cohort Study (AFRICOS)., Methods: Beginning in January 2013, PLWH at twelve clinics in Kenya, Uganda, Tanzania and Nigeria underwent medical history review, CD4 and viral load testing as part of the ongoing African Cohort Study (AFRICOS). ART-naïve PLWH who initiated ART within 30 days of enrollment and had at least one year of follow-up were included in these analyses. To compare ART response in participants < 50 years and ≥ 50 years old, changes in CD4 count and viral load suppression after ART initiation were examined at different time points using linear and binomial regression with generalized estimating equations. Variables for time since ART initiation and the interaction between age group and time on ART were included in the model to evaluate longitudinal changes in CD4 recovery and viral suppression by age., Results: Between January 2013 and September 2019, 2918 PLHV were enrolled in the cohort. Of these, 443 were ART naïve and initiated on ART within 30 days of enrollment, with 90% (n = 399) aged < 50 years old at ART initiation. At ART initiation, participants aged 50 and older had a higher median CD4 count compared to participants younger than 50 years of age although it did not reach statistical significance (306 cells/mm
3 , IQR:130-547 vs. 277cells/mm3 , IQR: 132-437). In adjusted models examining CD4 recovery and viral suppression there were no significant differences by age group over time. By the end of follow-up viral suppression was high among both groups of adults (96% of adults ≥ 50 years old and 92% of adults < 50 years old)., Conclusion: This study found no difference in long-term CD4 recovery or viral suppression by age at ART initiation. We found that particularly among younger adults participants had lower median CD4 counts at ART initiation, suggesting the importance of identifying and putting this population on treatment earlier in the disease course.- Published
- 2020
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26. Schistosoma haematobium infection and environmental factors in Southwestern Tanzania: A cross-sectional, population-based study.
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Manz KM, Kroidl I, Clowes P, Gerhardt M, Nyembe W, Maganga L, Assisya W, Ntinginya NE, Berger U, Hoelscher M, and Saathoff E
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- Adolescent, Adult, Animals, Child, Child, Preschool, Cross-Sectional Studies, Female, HIV Infections complications, Humans, Male, Risk Factors, Schistosoma haematobium, Schistosomiasis haematobia complications, Socioeconomic Factors, Tanzania epidemiology, Young Adult, Schistosomiasis haematobia epidemiology
- Abstract
Schistosomiasis is a leading cause of morbidity in Africa. Understanding the disease ecology and environmental factors that influence its distribution is important to guide control efforts. Geographic information systems have increasingly been used in the field of schistosomiasis environmental epidemiology. This study reports prevalences of Schistosoma haematobium infection and uses remotely sensed and questionnaire data from over 17000 participants to identify environmental and socio-demographic factors that are associated with this parasitic infection. Data regarding socio-demographic status and S. haematobium infection were obtained between May 2006 and May 2007 from 17280 participants (53% females, median age = 17 years) in the Mbeya Region, Tanzania. Combined with remotely sensed environmental data (vegetation cover, altitude, rainfall etc.) this data was analyzed to identify environmental and socio-demographic factors associated with S. haematobium infection, using mixed effects logistic regression and geostatistical modelling. The overall prevalence of S. haematobium infection was 5.3% (95% confidence interval (CI): 5.0-5.6%). Multivariable analysis revealed increased odds of infection for school-aged children (5-15 years, odds ratio (OR) = 7.8, CI: 5.9-10.4) and the age groups 15-25 and 25-35 years (15-25 years: OR = 5.8, CI: 4.3-8.0, 25-35 years: OR = 1.6, CI: 1.1-2.4) compared to persons above 35 years of age, for increasing distance to water courses (OR = 1.4, CI: 1.2-1.6 per km) and for proximity to Lake Nyasa (<1 km, OR = 4.5, CI: 1.8-11.4; 1-2 km, OR = 3.5, CI: 1.7-7.5; 2-4 km; OR = 3.3, CI: 1.7-6.6), when compared to distances >4 km. Odds of infection decreased with higher altitude (OR = 0.7, CI: 0.6-0.8 per 100 m increase) and with increasing enhanced vegetation index EVI (OR = 0.2, CI: 0.1-0.4 per 0.1 units). When additionally adjusting for spatial correlation population density became a significant predictor of schistosomiasis infection (OR = 1.3, CI: 1.1-1.5 per 1000 persons/km2) and altitude turned non-significant. We found highly focal geographical patterns of S. haematobium infection in Mbeya Region in Southwestern Tanzania. Despite low overall prevalence our spatially heterogeneous results show that some of the study sites suffer from a considerable burden of S. haematobium infection, which is related to various socio-demographic and environmental factors. Our results could help to design more effective control strategies in the future, especially targeting school-aged children living in low altitude sites and/or crowded areas as the persons at highest need for preventive chemotherapy., Competing Interests: The authors have declared that no competing interests exist.
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- 2020
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27. Antibody and cellular responses to HIV vaccine regimens with DNA plasmid as compared with ALVAC priming: An analysis of two randomized controlled trials.
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Moodie Z, Walsh SR, Laher F, Maganga L, Herce ME, Naidoo S, Hosseinipour MC, Innes C, Bekker LG, Grunenberg N, Mann P, Yu C, deCamp AC, Miner MD, Yates NL, Heptinstall J, Mkhize NN, Dintwe O, Frahm N, Cohen KW, Allen M, Hutter J, Wagner R, Pantaleo G, McElrath MJ, Tomaras GD, Morris L, Montefiori DC, Andersen-Nissen E, Gray GE, Gilbert PB, and Kublin JG
- Subjects
- Adult, Antibody Formation immunology, DNA genetics, Double-Blind Method, Female, Genetic Vectors, HIV Antigens immunology, HIV Infections prevention & control, HIV-1 genetics, HIV-1 immunology, Humans, Male, Plasmids genetics, Vaccination methods, Young Adult, AIDS Vaccines immunology, Antibodies, Neutralizing immunology, HIV Antibodies immunology
- Abstract
Background: DNA plasmids promise a pragmatic alternative to viral vectors for prime-boost HIV-1 vaccines. We evaluated DNA plasmid versus canarypox virus (ALVAC) primes in 2 randomized, double-blind, placebo-controlled trials in southern Africa with harmonized trial designs. HIV Vaccine Trials Network (HVTN) 111 tested DNA plasmid prime by needle or needleless injection device (Biojector) and DNA plasmid plus gp120 protein plus MF59 adjuvant boost. HVTN 100 tested ALVAC prime and ALVAC plus gp120 protein plus MF59 adjuvant boost (same protein/adjuvant as HVTN 111) by needle., Methods and Findings: The primary endpoints for this analysis were binding antibody (bAb) responses to HIV antigens (gp120 from strains ZM96, 1086, and TV1; variable 1 and 2 [V1V2] regions of gp120 from strains TV1, 1086, and B.CaseA, as 1086 V1V2 and B.CaseA were correlates of risk in the RV144 efficacy trial), neutralizing antibody (nAb) responses to pseudoviruses TV1c8.2 and MW925.26, and cellular responses to vaccine-matched antigens (envelope [Env] from strains ZM96, 1086, and TV1; and Gag from strains LAI and ZM96) at month 6.5, two weeks after the fourth vaccination. Per-protocol cohorts included vaccine recipients from HVTN 100 (n = 186, 60% male, median age 23 years) enrolled between February 9, 2015, and May 26, 2015 and from HVTN 111 (n = 56, 48% male, median age 24 years) enrolled between June 21, 2016, and July 13, 2017. IgG bAb response rates were 100% to 3 Env gp120 antigens in both trials. Response rates to V1V2 were lower and similar in both trials except to vaccine-matched 1086 V1V2, with rates significantly higher for the DNA-primed regimen than the ALVAC-primed regimen: 96.6% versus 72.7% (difference = 23.9%, 95% CI 15.6%-32.2%, p < 0.001). Among positive responders, bAb net mean fluorescence intensity (MFI) was significantly higher with the DNA-primed regimen than ALVAC-primed for 1086 V1V2 (geometric mean [GM] 2,833.3 versus 1,200.9; ratio = 2.36, 95% CI 1.42-3.92, p < 0.001) and B.CaseA V1V2 (GM 2314.0 versus 744.6, ratio = 3.11, 95% CI 1.51-6.38, p = 0.002). nAb response rates were >98% in both trials, with significantly higher 50% inhibitory dilution (ID50) among DNA-primed positive responders (n = 53) versus ALVAC-primed (n = 182) to tier 1A MW965.26 (GM 577.7 versus 265.7, ratio = 2.17, 95% CI 1.67-2.83, p < 0.001) and to TV1c8.2 (GM 187.3 versus 100.4, ratio = 1.87, 95% CI 1.48-2.35, p < 0.001). CD4+ T-cell response rates were significantly higher with DNA plasmid prime via Biojector than ALVAC prime (91.4% versus 52.8%, difference = 38.6%, 95% CI 20.5%-56.6%, p < 0.001 for ZM96.C; 88.0% versus 43.1%, difference = 44.9%, 95% CI 26.7%-63.1%, p < 0.001 for 1086.C; 55.5% versus 2.2%, difference = 53.3%, 95% CI 23.9%-82.7%, p < 0.001 for Gag LAI/ZM96). The study's main limitations include the nonrandomized comparison of vaccines from 2 different trials, the lack of data on immune responses to other non-vaccine-matched antigens, and the uncertain clinical significance of the observed immunological effects., Conclusions: In this study, we found that further investigation of DNA/protein regimens is warranted given enhanced immunogenicity to the V1V2 correlates of decreased HIV-1 acquisition risk identified in RV144, the only HIV vaccine trial to date to show any efficacy., Competing Interests: I have read the journal’s policy and the authors of this manuscript have the following competing interests: Sanofi Pasteur awarded a contract to Fred Hutch to provide statistical analysis by ZM and PBG, and reimbursement to PBG for travel/lodging for Advisory or collaboration meetings. No personal fees/independent consulting fees were received. ZM is a paid statistical advisor for PLOS Medicine. SRW has received clinical trial support from Janssen Vaccines. CI reports grants from NIH/NIAID, grants from Fred Hutchinson Cancer Research Center, during the conduct of the study. NG is an employee of Fred Hutchinson Cancer Research Center and grant recipient from NIH and BMGF.
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- 2020
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28. High turnaround times and low viral resuppression rates after reinforced adherence counselling following a confirmed virological failure diagnostic algorithm in HIV-infected patients on first-line antiretroviral therapy from Tanzania.
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Kroidl A, Burger T, Urio A, Mugeniwalwo R, Mgaya J, Mlagalila F, Hoelscher M, Däumer M, Salehe O, Sangare A, Lennemann T, and Maganga L
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- Adult, Algorithms, CD4 Lymphocyte Count, Counseling, Drug Monitoring, Female, HIV Infections blood, HIV Infections drug therapy, Humans, Male, Medication Adherence statistics & numerical data, Middle Aged, Tanzania epidemiology, Viral Load, Anti-Retroviral Agents therapeutic use, HIV Infections epidemiology, HIV-1, Medication Adherence psychology
- Abstract
Objective: Early identification of confirmed virological failure is paramount to avoid accumulation of drug resistance in patients on antiretroviral therapy (ART). Scale-up of HIV-RNA monitoring in Africa and timely switch to second-line regimens are challenged., Methods: A WHO adapted confirmed virological treatment screening algorithm (HIV-RNA screening, enhanced adherence counselling, confirmatory HIV-RNA testing) was evaluated in HIV-infected patients on first-line ART from Tanzania. The main endpoints included viral resuppression and virological failure rates, retention and turnaround time of the screening algorithm until second-line ART initiation. Secondary endpoints included risk factors for virological treatment failure and patterns of genotypic drug resistance., Results: HIV-RNA >1000 copies/ml at first screening was detected in 58/356 (16.3%) patients (median time-on-treatment 6.3 years, 25% immunological treatment failure). Adjusted risk factors for virological failure were age <30 years (RR 5.2 [95% CI: 2.5-10.8]), years on ART ≥3 years (RR 3.0 [1.0-8.9]), CD4-counts <200 cells/µl (RR 9.3 [4.0-21.8]) and poor self-reported treatment adherence (RR 2.0 [1.2-3.4]). Resuppression of HIV-RNA <1000 copies/ml was observed in 5/50 (10%) cases after enhanced adherence counselling. Confirmatory testing within 3 months was performed in only 46.6% and switch to second-line ART within 6 months in 60.4% of patients. Major NNRTI-mutation were detected in all of 30 patients, NRTI mutations in 96.7% and ≥3 thymidine-analogue mutations in 40%. No remaining NRTI options were predicted in 57% and limited susceptibility in 23% of patients., Conclusion: We observed low levels of viral resuppression following adherence counselling, associated with high levels of accumulated drug resistance. High visit burden and turnaround times for confirmed virological failure diagnosis further delayed switching to second-line treatment which could be improved using novel point-of-care viral load monitoring systems., (© 2020 The Authors. Tropical Medicine & International Health Published by John Wiley & Sons Ltd.)
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- 2020
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29. Predictors and Barriers to Condom Use in the African Cohort Study.
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Analogbei T, Dear N, Reed D, Esber A, Akintunde A, Bahemana E, Adamu Y, Iroezindu M, Maganga L, Kiweewa F, Maswai J, Owuoth J, Ake JA, Polyak CS, and Crowell TA
- Subjects
- Adolescent, Adult, Africa, Cohort Studies, Female, Humans, Male, Prospective Studies, Sexual Behavior, Young Adult, Condoms statistics & numerical data, HIV Infections prevention & control, Sexual Partners
- Abstract
Consistent condom use is an inexpensive and efficacious HIV prevention strategy. Understanding factors associated with condom use and barriers to use can inform strategies to increase condom uptake. The ongoing African Cohort Study prospectively enrolls adults at 12 clinical sites in Uganda, Kenya, Tanzania, and Nigeria. At enrollment, participants are asked about condom use at last sex with a regular partner. Robust Poisson regression models were used to evaluate predictors of self-reported condom use. Participants who reported not using condoms were asked to provide reasons. From January 2013 to September 2019, 2482 participants reported having at least one regular sexual partner in the preceding 6 months. Of those, 1577 (63.5%) reported using a condom at last sex. Condom use was more common among older participants, males, HIV-infected participants, and those with an HIV-infected partner. Married participants, those with a partner of unknown HIV status, and those reporting alcohol use were less likely to report condom use at last sex. Condom use at last sex also varied significantly by clinical site. Partner disapproval or refusal to use a condom was a consistent driver of disparities in condom use among participants who were HIV infected, female, and aged 18-24 years. Effective HIV prevention programs should integrate condom education with the tools necessary to negotiate condom use with regular partners.
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- 2020
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30. Molecular dating and viral load growth rates suggested that the eclipse phase lasted about a week in HIV-1 infected adults in East Africa and Thailand.
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Rolland M, Tovanabutra S, Dearlove B, Li Y, Owen CL, Lewitus E, Sanders-Buell E, Bose M, O'Sullivan A, Rossenkhan R, Labuschagne JPL, Edlefsen PT, Reeves DB, Kijak G, Miller S, Poltavee K, Lee J, Bonar L, Harbolick E, Ahani B, Pham P, Kibuuka H, Maganga L, Nitayaphan S, Sawe FK, Eller LA, Gramzinski R, Kim JH, Michael NL, and Robb ML
- Subjects
- Adult, Africa, Eastern, Female, HIV Infections genetics, HIV-1 genetics, Humans, Male, Prospective Studies, Thailand, Time Factors, Viremia genetics, Genome, Viral, HIV Infections diagnosis, HIV-1 metabolism, Molecular Diagnostic Techniques, Viral Load, Viremia diagnosis
- Abstract
Most HIV-1 infected individuals do not know their infection dates. Precise infection timing is crucial information for studies that document transmission networks or drug levels at infection. To improve infection timing, we used the prospective RV217 cohort where the window when plasma viremia becomes detectable is narrow: the last negative visit occurred a median of four days before the first detectable HIV-1 viremia with an RNA test, referred below as diagnosis. We sequenced 1,280 HIV-1 genomes from 39 participants at a median of 4, 32 and 170 days post-diagnosis. HIV-1 infections were dated by using sequence-based methods and a viral load regression method. Bayesian coalescent and viral load regression estimated that infections occurred a median of 6 days prior to diagnosis (IQR: 9-3 and 11-4 days prior, respectively). Poisson-Fitter, which analyzes the distribution of hamming distances among sequences, estimated a median of 7 days prior to diagnosis (IQR: 15-4 days) based on sequences sampled 4 days post-diagnosis, but it did not yield plausible results using sequences sampled at 32 days. Fourteen participants reported a high-risk exposure event at a median of 8 days prior to diagnosis (IQR: 12 to 6 days prior). These different methods concurred that HIV-1 infection occurred about a week before detectable viremia, corresponding to 20 days (IQR: 34-15 days) before peak viral load. Together, our methods comparison helps define a framework for future dating studies in early HIV-1 infection., Competing Interests: The authors have declared that no competing interests exist.
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- 2020
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31. Dynamic MAIT cell response with progressively enhanced innateness during acute HIV-1 infection.
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Lal KG, Kim D, Costanzo MC, Creegan M, Leeansyah E, Dias J, Paquin-Proulx D, Eller LA, Schuetz A, Phuang-Ngern Y, Krebs SJ, Slike BM, Kibuuka H, Maganga L, Nitayaphan S, Kosgei J, Sacdalan C, Ananworanich J, Bolton DL, Michael NL, Shacklett BL, Robb ML, Eller MA, and Sandberg JK
- Subjects
- Biomarkers blood, Biomarkers metabolism, C-Reactive Protein metabolism, Cohort Studies, HIV-1 physiology, Humans, Immunity, Innate genetics, Interferon Regulatory Factors genetics, Interferon Regulatory Factors metabolism, Lipopolysaccharide Receptors metabolism, Lymphocyte Activation, Mucosal-Associated Invariant T Cells metabolism, Mucosal-Associated Invariant T Cells microbiology, Receptors, Antigen, T-Cell genetics, Receptors, Antigen, T-Cell metabolism, Transcriptome, HIV Infections immunology, Mucosal-Associated Invariant T Cells immunology, Viremia immunology
- Abstract
Mucosa-associated invariant T (MAIT) cell loss in chronic HIV-1 infection is a significant insult to antimicrobial immune defenses. Here we investigate the response of MAIT cells during acute HIV-1 infection utilizing the RV217 cohort with paired longitudinal pre- and post-infection samples. MAIT cells are activated and expand in blood and mucosa coincident with peak HIV-1 viremia, in a manner associated with emerging microbial translocation. This is followed by a phase with elevated function as viral replication is controlled to a set-point level, and later by their functional decline at the onset of chronic infection. Interestingly, enhanced innate-like pathways and characteristics develop progressively in MAIT cells during infection, in parallel with TCR repertoire alterations. These findings delineate the dynamic MAIT cell response to acute HIV-1 infection, and show how the MAIT compartment initially responds and expands with enhanced function, followed by progressive reprogramming away from TCR-dependent antibacterial responses towards innate-like functionality.
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- 2020
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32. Wuchereria bancrofti infection is linked to systemic activation of CD4 and CD8 T cells.
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Kroidl I, Chachage M, Mnkai J, Nsojo A, Berninghoff M, Verweij JJ, Maganga L, Ntinginya NE, Maboko L, Clowes P, Hoelscher M, Saathoff E, and Geldmacher C
- Subjects
- Adult, Aged, Aged, 80 and over, Animals, Antigens, CD analysis, CD4-Positive T-Lymphocytes chemistry, CD8-Positive T-Lymphocytes chemistry, Elephantiasis, Filarial immunology, Female, Flow Cytometry, HLA-DR Antigens analysis, Humans, Male, Middle Aged, Prospective Studies, T-Lymphocyte Subsets chemistry, Young Adult, CD4-Positive T-Lymphocytes immunology, CD8-Positive T-Lymphocytes immunology, Elephantiasis, Filarial pathology, Lymphocyte Activation, T-Lymphocyte Subsets immunology, Wuchereria bancrofti immunology
- Abstract
Background: Susceptibility to HIV has been linked to systemic CD4+ T cell activation in cohorts of seronegative individuals with high HIV-exposure risk. We recently described an increased risk of HIV transmission in individuals infected with Wuchereria bancrofti, the causative agent for lymphatic filariasis, in a prospective cohort study. However, the reason for this phenomenon needs further investigation., Methodology/principal Findings: Two-hundred and thirty-five HIV negative adults were tested using Trop Bio ELISA for detection of W. bancrofti infection and Kato Katz urine filtration and stool based RT-PCR for detection of soil transmitted helminths and schistosomiasis. FACS analysis of the fresh peripheral whole blood was used to measure T cell activation markers (HLA-DR, CD38), differentiation markers (CD45, CD27), markers for regulatory T cells (FoxP3, CD25) and the HIV entry receptor CCR5. Frequencies of activated HLA-DRpos CD4 T cells were significantly increased in subjects with W. bancrofti infection (n = 33 median: 10.71%) compared to subjects without any helminth infection (n = 42, median 6.97%, p = 0.011) or those with other helminths (Schistosoma haematobium, S. mansoni, Trichuris trichiura, Ascaris lumbricoides, hookworm) (n = 151, median 7.38%, p = 0.009). Similarly, a significant increase in HLA-DRposCD38pos CD4 T cells and effector memory cells CD4 T cells (CD45ROposCD27neg) was observed in filarial infected participants. Multivariable analyses further confirmed a link between W. bancrofti infection and systemic activation of CD4 T cells independent of age, fever, gender or other helminth infections., Conclusions/significance: W. bancrofti infection is linked to systemic CD4 T cell activation, which may contribute to the increased susceptibility of W. bancrofti infected individuals to HIV infection., Competing Interests: The authors have declared that no competing interests exist.
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- 2019
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33. Persistent Low-level Viremia Predicts Subsequent Virologic Failure: Is It Time to Change the Third 90?
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Esber A, Polyak C, Kiweewa F, Maswai J, Owuoth J, Maganga L, Adamu Y, Hickey PW, Ake JA, and Crowell TA
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- Adult, Africa epidemiology, Female, HIV Infections epidemiology, Humans, Male, Middle Aged, Prevalence, Proportional Hazards Models, Prospective Studies, Risk Factors, Treatment Failure, Viremia epidemiology, World Health Organization, Young Adult, Anti-HIV Agents therapeutic use, HIV Infections drug therapy, Viral Load, Viremia drug therapy
- Abstract
Background: World Health Organization (WHO) guidelines identify human immunodeficiency virus (HIV) viral load <1000 copies/mL as the goal of antiretroviral therapy (ART). However, the clinical implications of viremia below this threshold are unclear in the African context. We examined factors associated with persistent low-level viremia (pLLV) and quantified the risk of subsequent virologic., Methods: The African Cohort Study enrolled HIV-infected adults at clinics in Uganda, Kenya, Tanzania, and Nigeria, with assessments every 6 months. We evaluated participants prescribed ART for at least 6 months without virologic failure for pLLV. We used multinomial logistic regression to evaluate associations between prespecified factors of interest and 3 levels of pLLV (<200, 200-499, and 500-999 copies/mL). We used Anderson-Gill extended Cox proportional hazards to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) for viremia category associations with time to failure., Results: We included 1511 participants with 4382 person-years of follow-up. PLLV <200 copies/mL was observed at 20% of visits while 2% of visits had pLLV 200-499 and 500-999 copies/mL each, with substantial variation by site. Protease inhibitor-containing ART was associated with increased risk of pLLV. Compared to undetectable viral load, pLLV ≥200 copies/mL doubled the risk of developing virologic failure (pLLV 200-499: HR, 1.81 [95% CI, 1.08-3.02]); pLLV 500-999: HR, 2.36 [95% CI, 1.52-3.67])., Conclusions: Participants with pLLV ≥200 copies/mL were at increased risk of subsequent virologic failure. Optimized HIV care in this setting should target viral suppression <200 copies/mL., (© The Author(s) 2018. Published by Oxford University Press for the Infectious Diseases Society of America. All rights reserved. For permissions, e-mail: journals.permissions@oup.com.)
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- 2019
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34. Noninfectious Comorbidity in the African Cohort Study.
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Ake JA, Polyak CS, Crowell TA, Kiweewa F, Semwogerere M, Maganga L, Bahemana E, Maswai J, Langat R, Owuoth J, Otieno S, Keshinro B, Esber AL, Liu M, Eller LA, Ganesan K, Parikh AP, Hamm TE, Robb ML, Hickey PW, Valcour VG, and Michael NL
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- Adult, Africa South of the Sahara, Comorbidity, Female, Humans, Longitudinal Studies, Male, Middle Aged, HIV Infections epidemiology, Noncommunicable Diseases epidemiology
- Abstract
Background: Noninfectious comorbid diseases (NCDs) contribute to morbidity and mortality in human immunodeficiency virus (HIV)-infected populations in resource-rich countries. With antiretroviral therapy (ART) scale-up in Africa, understanding burden NCD informs public health strategy., Methods: At enrollment, participants at 11 HIV clinics in Kenya, Uganda, Tanzania, and Nigeria underwent medical history, physical, laboratory, and neuropsychological assessments to identify elevated blood pressure, hypercholesterolemia, dysglycemia, renal insufficiency, and cognitive impairment. Poisson regression models estimated adjusted relative risks (ARRs) and 95% confidence intervals (CIs) for the number of NCDs associated with factors of interest. Logistic regression was used to evaluate each NCD separately among HIV-infected participants., Results: Among 2720 participants with complete NCD data, 2159 (79.4%) were HIV-infected. Of those, 1426 (66.0%) were taking ART and 813 (37.7%) had at least 1 NCD. HIV infection was associated with more NCDs, especially with ART (ARR, 1.42; 95% CI, 1.22-1.66). In addition to age, body mass index, and program site, ART usage was associated with more NCDs (ARR, 1.50; 95% CI, 1.27-1.78 for virologically suppressed and ARR, 1.38; 95% CI, 1.13-1.68 for viremic) among HIV-infected participants. In participants taking ART, CD4 nadir below 200 cells/mm3 was associated with more NCDs (ARR, 1.43; 95% CI, 1.06-1.93). ART use was independently associated with hypercholesterolemia and dysglycemia. Program site was significantly associated with all comorbidities except renal insufficiency., Conclusions: HIV infection was a risk for NCDs, which were common in HIV-infected participants, geographically variable, and largely consistent with metabolic complications of first-line ART., (Published by Oxford University Press for the Infectious Diseases Society of America 2018.)
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- 2019
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35. Expansion of Stem Cell-Like CD4 + Memory T Cells during Acute HIV-1 Infection Is Linked to Rapid Disease Progression.
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Pušnik J, Eller MA, Tassaneetrithep B, Schultz BT, Eller LA, Nitayaphan S, Kosgei J, Maganga L, Kibuuka H, Alter G, Michael NL, Robb ML, and Streeck H
- Subjects
- Acute Disease, CD4-Positive T-Lymphocytes virology, Cohort Studies, Female, Humans, Male, Stem Cells virology, Viremia immunology, CD4-Positive T-Lymphocytes immunology, HIV Infections immunology, HIV-1 immunology, Immunologic Memory, Stem Cells immunology, Up-Regulation immunology
- Abstract
Acute HIV-1 infection is characterized by high viremia and massive depletion of CD4
+ T cells throughout all tissue compartments. During this time the latent viral reservoir is established but the dynamics of memory CD4+ T cell subset development, their infectability and influence on disease progression during acute HIV-1 infection has not been carefully described. We therefore investigated the dynamics of CD4+ T cell memory populations in the RV217 (ECHO) cohort during the acute phase of infection. Interestingly, while we found only small changes in central or effector memory compartments, we observed a profound expansion of stem cell-like memory CD4+ T cells (SCM) (2.7-fold; P < 0.0001). Furthermore, we demonstrated that the HIV-1 integration and replication preferentially take place in highly differentiated CD4+ T cells such as transitional memory (TM) and effector memory (EM) CD4+ T cells, while naive and less mature memory cells prove to be more resistant. Despite the relatively low frequency of productively infected SCM, we suggest that their quiescent phenotype, increased susceptibility to HIV-1 integration compared to naive cells and extensive expansion make them one of the key players in establishment and persistence of the HIV-1 reservoir. Moreover, the expansion of SCM in acute HIV-1 infection was a result of Fas upregulation on the surface of naive CD4+ T cells. Interestingly, the upregulation of Fas receptor and expansion of SCM in acute HIV-1 infection was associated with the early viral set point and disease progression (rho = 0.47, P = 0.02, and rho = 0.42, P = 0.041, respectively). Taken together, our data demonstrate an expansion of SCM during early acute HIV-1 infection which is associated with disease outcome. IMPORTANCE Understanding the immunopathology of acute HIV-1 infection will help to develop eradication strategies. We demonstrate here that a CD4+ T cell memory subset expands during acute HIV-1 infection, which is associated with disease progression., (Copyright © 2019 American Society for Microbiology.)- Published
- 2019
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36. HIV virologic failure and its predictors among HIV-infected adults on antiretroviral therapy in the African Cohort Study.
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Kiweewa F, Esber A, Musingye E, Reed D, Crowell TA, Cham F, Semwogerere M, Namagembe R, Nambuya A, Kafeero C, Tindikahwa A, Eller LA, Millard M, Gelderblom HC, Keshinro B, Adamu Y, Maswai J, Owuoth J, Sing'oei VC, Maganga L, Bahemana E, Khamadi S, Robb ML, Ake JA, Polyak CS, and Kibuuka H
- Subjects
- Adolescent, Adult, Africa, CD4 Lymphocyte Count, Cohort Studies, Female, HIV Infections virology, HIV-1 genetics, HIV-1 isolation & purification, Humans, Linear Models, Male, Middle Aged, Multivariate Analysis, Predictive Value of Tests, RNA, Viral blood, Risk, Viral Load, Young Adult, Anti-Retroviral Agents therapeutic use, HIV Infections drug therapy, Treatment Failure
- Abstract
Introduction: The 2016 WHO consolidated guidelines on the use of antiretroviral drugs defines HIV virologic failure for low and middle income countries (LMIC) as plasma HIV-RNA ≥ 1000 copies/mL. We evaluated virologic failure and predictors in four African countries., Materials and Methods: We included HIV-infected participants on a WHO recommended antiretroviral therapy (ART) regimen and enrolled in the African Cohort Study between January 2013 and October 2017. Studied outcomes were virologic failure (plasma HIV-RNA ≥ 1000 copies/mL at the most recent visit), viraemia (plasma HIV-RNA ≥ 50 copies/mL at the most recent visit); and persistent viraemia (plasma HIV-RNA ≥ 50 copies/mL at two consecutive visits). Generalized linear models were used to estimate relative risks with their 95% confidence intervals., Results: 2054 participants were included in this analysis. Viraemia, persistent viraemia and virologic failure were observed in 396 (19.3%), 160 (7.8%) and 184 (9%) participants respectively. Of the participants with persistent viraemia, only 57.5% (92/160) had confirmed virologic failure. In the multivariate analysis, attending clinical care site other than the Uganda sitebeing on 2nd line ART (aRR 1.8, 95% CI 1·28-2·66); other ART combinations not first line and not second line (aRR 3.8, 95% CI 1.18-11.9), a history of fever in the past week (aRR 3.7, 95% CI 1.69-8.05), low CD4 count (aRR 6.9, 95% CI 4.7-10.2) and missing any day of ART (aRR 1·8, 95% CI 1·27-2.57) increased the risk of virologic failure. Being on 2nd line therapy, the site where one receives care and CD4 count < 500 predicted viraemia, persistent viraemia and virologic failure., Conclusion: In conclusion, these findings demonstrate that HIV-infected patients established on ART for more than six months in the African setting frequently experienced viraemia while continuing to be on ART. The findings also show that being on second line, low CD4 count, missing any day of ART and history of fever in the past week remain important predictors of virologic failure that should trigger intensified adherence counselling especially in the absence of reliable or readily available viral load monitoring. Finally, clinical care sites are different calling for further analyses to elucidate on the unique features of these sites., Competing Interests: Authors MM, MLR, JAA, CSP are affiliated with the U.S. Military HIV Research Program. The views expressed in this article are those of the authors and do not necessarily reflect the official policy or position of the U.S. Army or Department of Defense.
- Published
- 2019
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37. Correction: Rare HIV-1 transmitted/founder lineages identified by deep viral sequencing contribute to rapid shifts in dominant quasispecies during acute and early infection.
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Kijak GH, Sanders-Buell E, Chenine AL, Eller MA, Goonetilleke N, Thomas R, Leviyang S, Harbolick EA, Bose M, Pham P, Oropeza C, Poltavee K, O'Sullivan AM, Billings E, Merbah M, Costanzo MC, Warren JA, Slike B, Li H, Peachman KK, Fischer W, Gao F, Cicala C, Arthos J, Eller LA, O'Connell RJ, Sinei S, Maganga L, Kibuuka H, Nitayaphan S, Rao M, Marovich MA, Krebs SJ, Rolland M, Korber BT, Shaw GM, Michael NL, Robb ML, Tovanabutra S, and Kim JH
- Abstract
[This corrects the article DOI: 10.1371/journal.ppat.1006510.].
- Published
- 2017
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38. Rare HIV-1 transmitted/founder lineages identified by deep viral sequencing contribute to rapid shifts in dominant quasispecies during acute and early infection.
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Kijak GH, Sanders-Buell E, Chenine AL, Eller MA, Goonetilleke N, Thomas R, Leviyang S, Harbolick EA, Bose M, Pham P, Oropeza C, Poltavee K, O'Sullivan AM, Billings E, Merbah M, Costanzo MC, Warren JA, Slike B, Li H, Peachman KK, Fischer W, Gao F, Cicala C, Arthos J, Eller LA, O'Connell RJ, Sinei S, Maganga L, Kibuuka H, Nitayaphan S, Rao M, Marovich MA, Krebs SJ, Rolland M, Korber BT, Shaw GM, Michael NL, Robb ML, Tovanabutra S, and Kim JH
- Subjects
- Adolescent, Adult, Cohort Studies, Female, HIV Infections immunology, HIV Infections transmission, HIV-1 classification, HIV-1 physiology, High-Throughput Nucleotide Sequencing, Humans, Immune Evasion, Male, Middle Aged, T-Lymphocytes, Cytotoxic immunology, T-Lymphocytes, Cytotoxic virology, Young Adult, HIV Infections virology, HIV-1 genetics, HIV-1 isolation & purification
- Abstract
In order to inform the rational design of HIV-1 preventive and cure interventions it is critical to understand the events occurring during acute HIV-1 infection (AHI). Using viral deep sequencing on six participants from the early capture acute infection RV217 cohort, we have studied HIV-1 evolution in plasma collected twice weekly during the first weeks following the advent of viremia. The analysis of infections established by multiple transmitted/founder (T/F) viruses revealed novel viral profiles that included: a) the low-level persistence of minor T/F variants, b) the rapid replacement of the major T/F by a minor T/F, and c) an initial expansion of the minor T/F followed by a quick collapse of the same minor T/F to low frequency. In most participants, cytotoxic T-lymphocyte (CTL) escape was first detected at the end of peak viremia downslope, proceeded at higher rates than previously measured in HIV-1 infection, and usually occurred through the exploration of multiple mutational pathways within an epitope. The rapid emergence of CTL escape variants suggests a strong and early CTL response. Minor T/F viral strains can contribute to rapid and varied profiles of HIV-1 quasispecies evolution during AHI. Overall, our results demonstrate that early, deep, and frequent sampling is needed to investigate viral/host interaction during AHI, which could help identify prerequisites for prevention and cure of HIV-1 infection.
- Published
- 2017
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39. Virological efficacy of 24-week fozivudine-based regimen in ART-naive patients from Tanzania and Côte d'Ivoire.
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Kroidl A, Ello F, Mgaya J, Lennemann T, Moh R, Maganga L, Eholie S, Pruvost A, Saathoff E, Girard PM, Zuhse R, von Massow F, Anglaret X, Hoelscher M, and Danel C
- Subjects
- Adult, Anti-Retroviral Agents adverse effects, Anti-Retroviral Agents pharmacokinetics, Antiretroviral Therapy, Highly Active adverse effects, Cote d'Ivoire, Drug-Related Side Effects and Adverse Reactions epidemiology, Drug-Related Side Effects and Adverse Reactions pathology, Female, Humans, Lipids adverse effects, Lipids pharmacokinetics, Male, Middle Aged, Prospective Studies, Sustained Virologic Response, Tanzania, Treatment Outcome, Zidovudine administration & dosage, Zidovudine adverse effects, Zidovudine pharmacokinetics, Anti-Retroviral Agents administration & dosage, Antiretroviral Therapy, Highly Active methods, HIV Infections drug therapy, Lipids administration & dosage, Zidovudine analogs & derivatives
- Abstract
Objective: Use of zidovudine (ZDV) in antiretroviral therapy is limited by toxicity and twice daily (b.i.d.) dosing. Fozivudine (FZD) is a ZDV prodrug, which is activated intracellularly to ZDV-monophosphate especially in mononuclear cells but not in bone marrow cells. FZD promises improved myelotoxicity and once daily (o.d.) dosing., Design: Randomized clinical trial., Methods: We conducted an open-label, phase II, proof-of-concept trial investigating three different FZD doses (800 mg o.d., 600 mg b.i.d., 1200 mg o.d.) versus ZDV (300 mg b.i.d.) in combination with lamivudine and efavirenz in HIV-infected, ART-naive patients from Tanzania and Côte d'Ivoire. The primary objective was to demonstrate virological efficacy after 24 weeks in intent-to treat and per-protocol analysis. Secondary endpoints included safety and pharmacokinetic outcomes., Results: Of 119 participants included in the intent-to treat analysis, HIV RNA less than 50 copies/ml at 24 weeks was observed in 64 of 88 (73%) patients in the combined FZD arms versus 24 of 31 (77%) in the ZDV arm (RR 0.94, 95% confidence interval 0.75-1.18). In the per-protocol analysis, responses were 64 of 77 (87%) versus 23 of 29 (79%), respectively (RR 1.09, 95% confidence interval 0.89-1.34). Outcomes were similar between FZD arms. Overall, treatments were well tolerated. Severe or worse anaemia occurred in two cases (one related to FZD, one to ZDV), grade III/IV neutropenia was less frequent in FZD compared with ZDV arms (22 versus 42%, P = 0.035). Pharmacokinetic analysis supported o.d. administration of FZD., Conclusion: Virological 24-week efficacy was demonstrated in b.i.d. and o.d. administered FZD-based regimens. Reduced myelotoxicity of FZD needs to be confirmed in a larger trial.
- Published
- 2017
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40. Effect of Wuchereria bancrofti infection on HIV incidence in southwest Tanzania: a prospective cohort study.
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Kroidl I, Saathoff E, Maganga L, Makunde WH, Hoerauf A, Geldmacher C, Clowes P, Maboko L, and Hoelscher M
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- Adolescent, Adult, Animals, Circumcision, Male, Enzyme-Linked Immunosorbent Assay, Female, Humans, Incidence, Male, Marital Status, Middle Aged, Prevalence, Prospective Studies, Risk Assessment, Risk Factors, Sampling Studies, Sexual Partners, Tanzania epidemiology, Wuchereria bancrofti isolation & purification, Antigens, Helminth blood, Elephantiasis, Filarial epidemiology, Elephantiasis, Filarial immunology, Endemic Diseases statistics & numerical data, HIV Infections epidemiology, HIV Infections immunology, Wuchereria bancrofti immunology
- Abstract
Background: The past decades have seen an ongoing controversial debate about whether the immune activation induced by helminths has an effect on the susceptibility of individuals to HIV. In view of this, we assessed the effect of lymphatic filariasis, a chronic helminth disease elicited by Wuchereria bancrofti, on HIV incidence in southwest Tanzania., Methods: In this population-based cohort study, we enrolled a geographically stratified randomly chosen sample of about 10% of the households in nine distinct sites in southwest Tanzania. All household members present were followed up and tested for HIV and circulating filarial antigen, an indicator of W bancrofti adult worm burden. Our main outcome of interest was HIV incidence in participants with or without lymphatic filariasis., Findings: Between May 29, 2006, and June 16, 2011, we enrolled 4283 households with roughly 18 000 participants. Of these, 2699 individuals from Kyela district participated in at least one round of the EMINI study. In the 1055 initially HIV-negative adolescents and adults with clearly defined lymphatic filariasis status, 32 new HIV infections were observed in 2626 person-years. HIV incidence in lymphatic filariasis-positive participants (1·91 cases per 100 person-years) was significantly higher than the incidence in lymphatic filariasis-negative participants (0·80 cases per 100 person-years). The age-adjusted and sex-adjusted incidence rate ratio was 2·17 (95% CI 1·08-4·37, p=0·0300). Lymphatic filariasis status remained an independent and significantly relevant risk factor for HIV infection when controlled for other known risk factors such as sexual behaviour and socioeconomic factors., Interpretation: To our knowledge, this is the first prospective study demonstrating a significantly increased risk of acquiring HIV for lymphatic filariasis-infected individuals. Immunological studies and interventional treatment studies that eliminate the adult worms and not only the microfilariae are needed to follow up on the results presented., Funding: European Union as part of EuropAid; German Federal Ministry of Education and Research; German Center for Infection Research., (Copyright © 2016 Elsevier Ltd. All rights reserved.)
- Published
- 2016
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41. Correction: Prevalence of Lymphatic Filariasis and Treatment Effectiveness of Albendazole/ Ivermectin in Individuals with HIV Co-infection in Southwest-Tanzania.
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Kroidl I, Saathoff E, Maganga L, Clowes P, Maboko L, Hoerauf A, Makunde WH, Haule A, Mviombo P, Pitter B, Mgeni N, Mabuye J, Kowuor D, Mwingira U, Malecela MN, Löscher T, and Hoelscher M
- Abstract
[This corrects the article DOI: 10.1371/journal.pntd.0004618.].
- Published
- 2016
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42. Temporal Dynamics of CD8+ T Cell Effector Responses during Primary HIV Infection.
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Demers KR, Makedonas G, Buggert M, Eller MA, Ratcliffe SJ, Goonetilleke N, Li CK, Eller LA, Rono K, Maganga L, Nitayaphan S, Kibuuka H, Routy JP, Slifka MK, Haynes BF, McMichael AJ, Bernard NF, Robb ML, and Betts MR
- Subjects
- Adult, CD8-Positive T-Lymphocytes pathology, Chronic Disease, Female, HIV Infections pathology, Humans, Male, Middle Aged, Perforin immunology, T-Box Domain Proteins immunology, CD8-Positive T-Lymphocytes immunology, Cell Proliferation, HIV Infections immunology, Immunity, Cellular
- Abstract
The loss of HIV-specific CD8+ T cell cytolytic function is a primary factor underlying progressive HIV infection, but whether HIV-specific CD8+ T cells initially possess cytolytic effector capacity, and when and why this may be lost during infection, is unclear. Here, we assessed CD8+ T cell functional evolution from primary to chronic HIV infection. We observed a profound expansion of perforin+ CD8+ T cells immediately following HIV infection that quickly waned after acute viremia resolution. Selective expression of the effector-associated transcription factors T-bet and eomesodermin in cytokine-producing HIV-specific CD8+ T cells differentiated HIV-specific from bulk memory CD8+ T cell effector expansion. As infection progressed expression of perforin was maintained in HIV-specific CD8+ T cells with high levels of T-bet, but not necessarily in the population of T-betLo HIV-specific CD8+ T cells that expand as infection progresses. Together, these data demonstrate that while HIV-specific CD8+ T cells in acute HIV infection initially possess cytolytic potential, progressive transcriptional dysregulation leads to the reduced CD8+ T cell perforin expression characteristic of chronic HIV infection.
- Published
- 2016
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43. Prospective Study of Acute HIV-1 Infection in Adults in East Africa and Thailand.
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Robb ML, Eller LA, Kibuuka H, Rono K, Maganga L, Nitayaphan S, Kroon E, Sawe FK, Sinei S, Sriplienchan S, Jagodzinski LL, Malia J, Manak M, de Souza MS, Tovanabutra S, Sanders-Buell E, Rolland M, Dorsey-Spitz J, Eller MA, Milazzo M, Li Q, Lewandowski A, Wu H, Swann E, O'Connell RJ, Peel S, Dawson P, Kim JH, and Michael NL
- Subjects
- Adolescent, Adult, Africa, Eastern, Antibodies, Viral blood, CD4 Lymphocyte Count, Disease Progression, Female, HIV Infections virology, Humans, Male, Middle Aged, Prospective Studies, RNA, Viral blood, Thailand, Viral Load, HIV Infections diagnosis, HIV-1 genetics, HIV-1 immunology, HIV-1 isolation & purification, Viremia diagnosis
- Abstract
Background: Acute human immunodeficiency virus type 1 (HIV-1) infection is a major contributor to transmission of HIV-1. An understanding of acute HIV-1 infection may be important in the development of treatment strategies to eradicate HIV-1 or achieve a functional cure., Methods: We performed twice-weekly qualitative plasma HIV-1 RNA nucleic acid testing in 2276 volunteers who were at high risk for HIV-1 infection. For participants in whom acute HIV-1 infection was detected, clinical observations, quantitative measurements of plasma HIV-1 RNA levels (to assess viremia) and HIV antibodies, and results of immunophenotyping of lymphocytes were obtained twice weekly., Results: Fifty of 112 volunteers with acute HIV-1 infection had two or more blood samples collected before HIV-1 antibodies were detected. The median peak viremia (6.7 log10 copies per milliliter) occurred 13 days after the first sample showed reactivity on nucleic acid testing. Reactivity on an enzyme immunoassay occurred at a median of 14 days. The nadir of viremia (4.3 log10 copies per milliliter) occurred at a median of 31 days and was nearly equivalent to the viral-load set point, the steady-state viremia that persists durably after resolution of acute viremia (median plasma HIV-1 RNA level, 4.4 log10 copies per milliliter). The peak viremia and downslope were correlated with the viral-load set point. Clinical manifestations of acute HIV-1 infection were most common just before and at the time of peak viremia. A median of one symptom of acute HIV-1 infection was recorded at a median of two study visits, and a median of one sign of acute HIV-1 infection was recorded at a median of three visits., Conclusions: The viral-load set point occurred at a median of 31 days after the first detection of plasma viremia and correlated with peak viremia. Few symptoms and signs were observed during acute HIV-1 infection, and they were most common before peak viremia. (Funded by the Department of Defense and the National Institute of Allergy and Infectious Diseases.)., Competing Interests: No potential conflict of interest relevant to this article was reported.
- Published
- 2016
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44. Prevalence of Lymphatic Filariasis and Treatment Effectiveness of Albendazole/ Ivermectin in Individuals with HIV Co-infection in Southwest-Tanzania.
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Kroidl I, Saathof E, Maganga L, Clowes P, Maboko L, Hoerauf A, Makunde WH, Haule A, Mviombo P, Pitter B, Mgeni N, Mabuye J, Kowuor D, Mwingira U, Malecela MN, Löscher T, and Hoelscher M
- Subjects
- Animals, Antigens, Protozoan blood, Coinfection drug therapy, Humans, Prevalence, Tanzania epidemiology, Treatment Outcome, Wuchereria bancrofti drug effects, Wuchereria bancrofti isolation & purification, Albendazole therapeutic use, Elephantiasis, Filarial drug therapy, Elephantiasis, Filarial epidemiology, Filaricides therapeutic use, HIV Infections complications, Ivermectin therapeutic use
- Abstract
Background: Annual mass treatment with ivermectin and albendazole is used to treat lymphatic filariasis in many African countries, including Tanzania. In areas where both diseases occur, it is unclear whether HIV co-infection reduces treatment success., Methodology: In a general population study in Southwest Tanzania, individuals were tested for HIV and circulating filarial antigen, an indicator of Wuchereria bancrofti adult worm burden, before the first and after 2 consecutive rounds of anti-filarial mass drug administration., Principle Findings: Testing of 2104 individuals aged 0-94 years before anti-filarial treatment revealed a prevalence of 24.8% for lymphatic filariasis and an HIV-prevalence of 8.9%. Lymphatic filariasis was rare in children, but prevalence increased in individuals above 10 years, whereas a strong increase in HIV was only seen above 18 years of age. The prevalence of lymphatic filariasis in adults above 18 years was 42.6% and 41.7% (p = 0.834) in HIV-negatives and-positives, respectively. Similarly, the HIV prevalence in the lymphatic filariasis infected (16.6%) and uninfected adult population (17.1%) was nearly the same. Of the above 2104 individuals 798 were re-tested after 2 rounds of antifilarial treatment. A significant reduction in the prevalence of circulating filarial antigen from 21.6% to 19.7% was found after treatment (relative drop of 8.8%, McNemar's exact p = 0.036). Furthermore, the post-treatment reduction of CFA positivity was (non-significantly) larger in HIV-positives than in HIV-negatives (univariable linear regression p = 0.154)., Conclusion/significance: In an area with a high prevalence for both diseases, no difference was found between HIV-infected and uninfected individuals regarding the initial prevalence of lymphatic filariasis. A moderate but significant reduction in lymphatic filariasis prevalence and worm burden was demonstrated after two rounds of treatment with albendazole and ivermectin. Treatment effects were more pronounced in the HIV co-infected subgroup, indicating that the effectiveness of antifilarial treatment was not reduced by concomitant HIV-infection. Studies with longer follow-up time could validate the observed differences in treatment effectiveness.
- Published
- 2016
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45. Expansion of Inefficient HIV-Specific CD8 T Cells during Acute Infection.
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Eller MA, Goonetilleke N, Tassaneetrithep B, Eller LA, Costanzo MC, Johnson S, Betts MR, Krebs SJ, Slike BM, Nitayaphan S, Rono K, Tovanabutra S, Maganga L, Kibuuka H, Jagodzinski L, Peel S, Rolland M, Marovich MA, Kim JH, Michael NL, Robb ML, and Streeck H
- Subjects
- Acute Disease, Adolescent, Adult, CD4-Positive T-Lymphocytes immunology, Cell Proliferation, Epitopes, Female, HIV Infections virology, Humans, Immunophenotyping, Lymphocyte Count, Male, Middle Aged, T-Lymphocyte Subsets immunology, Viral Load, Virus Replication, Young Adult, CD8-Positive T-Lymphocytes immunology, HIV Infections immunology
- Abstract
Unlabelled: Attrition within the CD4(+)T cell compartment, high viremia, and a cytokine storm characterize the early days after HIV infection. When the first emerging HIV-specific CD8(+)T cell responses gain control over viral replication it is incomplete, and clearance of HIV infection is not achieved even in the rare cases of individuals who spontaneously control viral replication to nearly immeasurably low levels. Thus, despite their partial ability to control viremia, HIV-specific CD8(+)T cell responses are insufficient to clear HIV infection. Studying individuals in the first few days of acute HIV infection, we detected the emergence of a unique population of CD38(+)CD27(-)CD8(+)T cells characterized by the low expression of the CD8 receptor (CD8(dim)). Interestingly, while high frequencies of HIV-specific CD8(+)T cell responses occur within the CD38(+)CD27(-)CD8(dim)T cell population, the minority populations of CD8(bright)T cells are significantly more effective in inhibiting HIV replication. Furthermore, the frequency of CD8(dim)T cells directly correlates with viral load and clinical predictors of more rapid disease progression. We found that a canonical burst of proliferative cytokines coincides with the emergence of CD8(dim)T cells, and the size of this population inversely correlates with the acute loss of CD4(+)T cells. These data indicate, for the first time, that early CD4(+)T cell loss coincides with the expansion of a functionally impaired HIV-specific CD8(dim)T cell population less efficient in controlling HIV viremia., Importance: A distinct population of activated CD8(+)T cells appears during acute HIV infection with diminished capacity to inhibit HIV replication and is predictive of viral set point, offering the first immunologic evidence of CD8(+)T cell dysfunction during acute infection., (Copyright © 2016, American Society for Microbiology. All Rights Reserved.)
- Published
- 2016
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46. Evaluation of health research capacity strengthening trainings on individual level: validation of a questionnaire.
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Huber J, Bauer D, Hoelscher M, Kapungu J, Kroidl A, Lennemann T, Maganga L, Opitz O, Salehe O, Sigauke A, Fischer MR, and Kiessling C
- Subjects
- Factor Analysis, Statistical, Female, Humans, Inservice Training, Male, Psychometrics, Tanzania, Health Occupations education, Health Services Research, Professional Competence, Surveys and Questionnaires standards
- Abstract
Rationale, Aims and Objectives: In the field of global health, research capacity strengthening is becoming a common concept for defining and improving research competencies on individual, organizational, national and supranational level. However, HRCS activities often lack evaluation procedures to measure their impact and to ensure their quality. The aim of this study was to develop and validate a short questionnaire to evaluate trainings in the field of health research capacity strengthening (HRCS)., Method: The questionnaire was developed by an interdisciplinary research team and tested in four different training settings at the Mbeya Medical Research Center and Mbeya Referral Hospital, Tanzania. Construct validity of the questionnaire was tested based on 97 responses of the participants of four trainings., Results: Iterative checking of Cronbach's alpha of the subscales and exploratory factor analysis revealed a four-factor solution that differed from the original structure and subscales of the questionnaire. The instrument was adapted accordingly and consists now of four subscales with 19 items, three global impression items, and open questions for participants' comments and recommendations., Conclusions: The result of the study is a short, validated questionnaire for the evaluation of HRCS trainings on the individual level. The tool can be applied both to measure the short-term effects of international health research capacity trainings and to ensure their quality. In the future, after collecting larger sample sizes, a confirmatory factor analysis should be done to further support the four factors., (© 2014 John Wiley & Sons, Ltd.)
- Published
- 2014
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47. Low specificity of determine HIV1/2 RDT using whole blood in south west Tanzania.
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Kroidl I, Clowes P, Mwalongo W, Maganga L, Maboko L, Kroidl AL, Geldmacher C, Machibya H, Hoelscher M, and Saathoff E
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Algorithms, Child, Child, Preschool, False Positive Reactions, Female, HIV Infections epidemiology, HIV Infections virology, Humans, Likelihood Functions, Male, Middle Aged, Multivariate Analysis, Sensitivity and Specificity, Tanzania epidemiology, Young Adult, Diagnostic Techniques and Procedures, HIV Infections blood, HIV Infections diagnosis, HIV-1 isolation & purification, HIV-2 isolation & purification, Reagent Kits, Diagnostic
- Abstract
Objective: To evaluate the diagnostic performance of two rapid detection tests (RDTs) for HIV 1/2 in plasma and in whole blood samples., Methods: More than 15,000 study subjects above the age of two years participated in two rounds of a cohort study to determine the prevalence of HIV. HIV testing was performed using the Determine HIV 1/2 test (Abbott) in the first (2006/2007) and the HIV 1/2 STAT-PAK Dipstick Assay (Chembio) in the second round (2007/2008) of the survey. Positive results were classified into faint and strong bands depending on the visual appearance of the test strip and confirmed by ELISA and Western blot., Results: The sensitivity and specificity of the Determine RDT were 100% (95% confidence interval= 86.8 to 100%) and 96.8% (95.9 to 97.6%) in whole blood and 100% (99.7 to 100%) and 97.9% (97.6 to 98.1%) in plasma respectively. Specificity was highly dependent on the tested sample type: when using whole blood, 67.1% of positive results were false positive, as opposed to 17.4% in plasma. Test strips with only faint positive bands were more often false positive than strips showing strong bands and were more common in whole blood than in plasma. Evaluation of the STAT-PAK RDT in plasma during the second year resulted in a sensitivity of 99.7% (99.1 to 99.9%) and a specificity of 99.3% (99.1 to 99.4%) with 6.9% of the positive results being false., Conclusions: Our study shows that the Determine HIV 1/2 strip test with its high sensitivity is an excellent tool to screen for HIV infection, but that--at least in our setting--it can not be recommended as a confirmatory test in VCT campaigns where whole blood is used.
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- 2012
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48. Viral and host factors associated with the HIV-1 viral load setpoint in adults from Mbeya Region, Tanzania.
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Saathoff E, Pritsch M, Geldmacher C, Hoffmann O, Koehler RN, Maboko L, Maganga L, Geis S, McCutchan FE, Kijak GH, Kim JH, Arroyo MA, Gerhardt M, Tovanabutra S, Robb ML, Williamson C, Michael NL, and Hoelscher M
- Subjects
- Adolescent, Adult, CD4 Lymphocyte Count, Cohort Studies, Female, Genes, MHC Class I, HIV Infections immunology, Humans, Male, Multivariate Analysis, Poisson Distribution, Risk Factors, Socioeconomic Factors, Tanzania epidemiology, Viremia epidemiology, Viremia immunology, Viremia virology, Young Adult, HIV Infections epidemiology, HIV Infections virology, HIV-1 classification, Viral Load
- Abstract
Background: The viral load setpoint (VLS) is an important predictor of HIV disease progression, but there is a lack of information regarding the VLS and its possible determinants in African populations., Methods: Initially HIV-negative adults from 3 distinct groups(female bar workers, females, and males from the general population)were followed for up to 4 years. The VLS was calculated for 108 seroconverters and associations of the VLS with possible risk factors were analyzed using univariate and multivariate regression., Results: The median VLS for female bar workers, females, and males from the general population were 69,850, 28,600, and 158,000 RNA copies per milliliter, respectively. Significant associations with an elevated viral load were observed for male gender [risk ratio(RR) = 1.83, 95% confidence interval (95% CI) = 1.14 to 2.93], the expression of harmful HLA I alleles (RR = 1.73, 95% CI = 1.13 to 2.66) and multiple infection with different HIV-1 subtypes (RR =1.65, 95% CI = 1.03 to 2.66). Bar workers were considerably more often infected with different HIV-1 subtypes than participants from the general population., Conclusions: Our study confirms that gender and the expression of different HLA class I alleles are important determinants of the viremia at VLS, and it also corroborates an earlier finding that multiple infection with different HIV-1 subtypes is associated with a higher VLS.
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- 2010
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49. Low sensitivity of a urine LAM-ELISA in the diagnosis of pulmonary tuberculosis.
- Author
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Reither K, Saathoff E, Jung J, Minja LT, Kroidl I, Saad E, Huggett JF, Ntinginya EN, Maganga L, Maboko L, and Hoelscher M
- Subjects
- Adult, Female, Humans, Male, Predictive Value of Tests, Proteinuria urine, Sensitivity and Specificity, Tuberculosis, Pulmonary urine, Enzyme-Linked Immunosorbent Assay methods, Lipopolysaccharides urine, Mycobacterium tuberculosis isolation & purification, Reagent Kits, Diagnostic, Tuberculosis, Pulmonary diagnosis
- Abstract
Background: The development and evaluation of rapid and accurate new diagnostic tools is essential to improve tuberculosis (TB) control in developing countries. In a previous study, the first release of a urine LAM-ELISA by Chemogen (Portland, USA) has been evaluated with a promising sensitivity and specificity for the diagnosis of pulmonary TB. In the present study, the now commercially available assay has been clinically assessed regarding its diagnostic value alone and in combination with clinical co-factors., Methods: The test was applied to two urine samples from 291 consecutively enrolled Tanzanian patients with suspected pulmonary tuberculosis. The participants were subsequently assigned to classification groups according to microbiological, clinical and radiological findings at recruitment and during a maximum follow up period of 56 days., Results: Only 35 out of 69 pulmonary TB cases -confirmed by smear microscopy and/or solid culture and/or liquid culture- showed at least one positive LAM-ELISA result (sensitivity 50.7%). The sensitivity was noticeably higher in females (66.7%) and in HIV positive participants (62.0%). The specificity amounted to 87.8% and was determined in participants with negative results in all microbiological tests and with sustained recovery under antibiotic treatment at day 56. Correlation with urinalysis revealed that proteinuria was significantly and positively associated with LAM-positivity (P = 0.026)., Conclusion: This commercially available generation of LAM-ELISA does not appear to be useful as an independent diagnostic test for pulmonary tuberculosis. The question whether the assay is suitable as a supplemental device in the diagnosis of HIV-associated TB, requires further investigations.
- Published
- 2009
- Full Text
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50. Contraceptive use in women enrolled into preventive HIV vaccine trials: experience from a phase I/II trial in East Africa.
- Author
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Kibuuka H, Guwatudde D, Kimutai R, Maganga L, Maboko L, Watyema C, Sawe F, Shaffer D, Matsiko D, Millard M, Michael N, Wabwire-Mangen F, and Robb M
- Subjects
- Adult, Data Interpretation, Statistical, Female, Humans, Kenya, Middle Aged, Tanzania, Uganda, AIDS Vaccines, Clinical Trials, Phase I as Topic, Clinical Trials, Phase II as Topic, Contraceptive Agents, Female classification, HIV Infections prevention & control
- Abstract
Background: HIV vaccine trials generally require that pregnant women are excluded from participation, and contraceptive methods must be used to prevent pregnancy during the trial. However, access to quality services and misconceptions associated with contraceptive methods may impact on their effective use in developing countries. We describe the pattern of contraceptive use in a multi-site phase I/IIa HIV Vaccine trial in East Africa (Uganda, Kenya and Tanzania) and factors that may have influenced their use during the trial., Methods: Pregnancy prevention counseling was provided to female participants during informed consent process and at each study visit. Participants' methods of contraception used were documented. Methods of contraceptives were provided on site. Pregnancy testing was done at designated visits during the trial. Obstacles to contraceptive use were identified and addressed at each visit., Results: Overall, 103 (31.8%) of a total of 324 enrolled volunteers were females. Female participants were generally young with a mean age of 29(+/-7.2), married (49.5%) and had less than high school education (62.1%). Hormonal contraceptives were the most common method of contraception (58.3%) followed by condom use (22.3%). The distribution of methods of contraception among the three sites was similar except for more condom use and less abstinence in Uganda. The majority of women (85.4%) reported to contraceptive use prior to screening. The reasons for not using contraception included access to quality services, insufficient knowledge of certain methods, and misconceptions., Conclusion: Although hormonal contraceptives were frequently used by females participating in the vaccine trial, misconceptions and their incorrect use might have led to inconsistent use resulting in undesired pregnancies. The study underscores the need for an integrated approach to pregnancy prevention counseling during HIV vaccine trials., Trial Registration: ClinicalTrials.gov NCT00123968.
- Published
- 2009
- Full Text
- View/download PDF
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