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1. The Effects of Hydroxyurea Therapy on the Six-Minute Walk Distance in Patients with Adult Sickle Cell Anemia: An Echocardiographic Study

Author

Garadah,Taysir, Mandeel,Fatema, Jaradat,Ahmed, and Bin Thani,Khalid

Subjects
Journal of Blood Medicine
Abstract

Taysir Garadah,1,2 Fatema Mandeel,2 Ahmed Jaradat,1 Khalid Bin Thani1,2 1Medical Department, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Kingdom of Bahrain; 2Medical Department, Cardiac Unit, Salmanyia Medical Complex, Manama, Kingdom of BahrainCorrespondence: Taysir GaradahMedical Department, College of Medicine and Medical Sciences, Arabian Gulf University, P.O. Box 26671, Manama, Kingdom of BahrainTel +973-17239681Fax +973-17230730Email garadaht@hotmail.comBackground: The impact of hydroxyurea (HU) medication as treatment of choice has not been evaluated in adult sickle cell anemia (SCA) patients in terms of the 6-min walk distance (6 MWD).Aim: The aim of the study was evaluating the effects of HU on the 6 MWD, serum brain natriuretic peptide (NT-pro BNP) level, and pulmonary hypertension (PH) measured by tricuspid regurgitation velocity (TRV).Methods: In this cross-sectional, prospective study, 110 patients with homozygous SCA were studied and compared with age- and gender-matched healthy controls. Every patient was investigated via pulsed and tissue Doppler echo evaluation, 6-min walk test (6 MWT), and blood level for the level of NT-pro-BNP hormone. Data were compared in patients with (n = 59; group 1, G1) and without (n = 51; group 2, G2) HU medication. Pearson correlation analysis was applied and clinical follow-up for the frequency of acute chest syndrome (ACS). Analysis of variance (ANOVA) multivariate statistical analysis was applied between groups.Results: In the study, 110 patients with SCA were studied and compared with 110 control patients. Patients in G1 compared with G2 had a longer 6 MWD (491 ± 64.4 m vs 428.6 ± 54.3 m, p < 0.005), higher HbF% (21 ± 2.5% vs 8 ± 1.8%, p < 0.005), and lower NT-pro-BNP level (314.1 ± 27.5 pmol/L vs 407 ± 18.9 pmol/L, p = 0.05). The mean TRV values were 2.8 ± 0.5 m/s in G1 versus 3.4 ± 0.4 m/s in G2, p < 0.005, and 1.5 ± 0.7 m/s in the control group. The high probability of PH based on a TRV > 3.4 m/s was 10.1% in G1 versus 17.6% in G2 and 3.6% in the control. There were weak positive correlations between NT-pro-BNP and TRV (r = 0.264; p = 0.005) and HbF% and 6 MWD (r = 0.452; p = 0.001). After 12 months of follow-up, frequency of acute chest syndrome (ACS) was twice as high in G2, at 32 patients, versus 16 in G1.Conclusion: Patients with SCA on HU medication compared with no HU had significantly longer 6 MWD, lower level of NT-pro-BNP, higher HbF% level. After 1-year follow-up HU patients had less frequency of ACS. There were significant positive correlations between the level of NT-pro BNP level and TRV in m/s on echo.Keywords: sickle cell anemia, 6-min walk test, hydroxyurea, NT-pro BNP, echocardiography, diastolic dysfunction, pulmonary hypertension

Published
2019

2. Worldwide experience of homozygous familial hypercholesterolaemia:retrospective cohort study

Author

Tycho R Tromp, Merel L Hartgers, G Kees Hovingh, Antonio J Vallejo-Vaz, Kausik K Ray, Handrean Soran, Tomas Freiberger, Stefano Bertolini, Mariko Harada-Shiba, Dirk J Blom, Frederick J Raal, Marina Cuchel, Tycho R. Tromp, Merel L. Hartgers, G. Kees Hovingh, Antonio J. Vallejo-Vaz, Kausik K. Ray, Stefano A. Bertolini, Jing Pang, Gerald F. Watts, Susanne Greber-Platzer, Martin Mäser, Thomas M. Stulnig, Christoph F. Ebenbichler, Khalid Bin Thani, David Cassiman, Olivier S. Descamps, Daisy Rymen, Peter Witters, Raul D. Santos, Liam R. Brunham, Gordon A. Francis, Jacques Genest, Robert A. Hegele, Brooke A. Kennedy, Isabelle Ruel, Mark H. Sherman, Long Jiang, Luya Wang, Željko Reiner, Vladimir Blaha, Richard Ceska, Jana Dvorakova, Lubomir Dlouhy, Pavel Horak, Vladimir Soska, Lukas Tichy, Robin Urbanek, Helena Vaverkova, Michal Vrablik, Stanislav Zemek, Lukas Zlatohlavek, Sameh Emil, Tarek Naguib, Ashraf Reda, Sophie Béliard, Eric Bruckert, Antonio Gallo, Moses S. Elisaf, Genovefa Kolovou, Hofit Cohen, Ronen Durst, Eldad J. Dann, Avishay Elis, Osama Hussein, Eran Leitersdorf, Daniel Schurr, Nitika Setia, Ishwar C. Verma, Mohammed D. Alareedh, Mutaz Al-Khnifsawi, Ali F. Abdalsahib Al-Zamili, Sabah H. Rhadi, Foaad K. Shaghee, Marcello Arca, Maurizio Averna, Andrea Bartuli, Marco Bucci, Paola S. Buonuomo, Paolo Calabrò, Sebastiano Calandra, Manuela Casula, Alberico L. Catapano, Angelo B. Cefalù, Arrigo F.G. Cicero, Sergio D'Addato, Laura D'Erasmo, Alessia Di Costanzo, Tommaso Fasano, Marta Gazzotti, Antonina Giammanco, Gabriella Iannuzzo, Anastasia Ibba, Emanuele A. Negri, Andrea Pasta, Chiara Pavanello, Livia Pisciotta, Claudio Rabacchi, Carlo Ripoli, Tiziana Sampietro, Francesco Sbrana, Fulvio Sileo, Patrizia Suppressa, Patrizia Tarugi, Chiara Trenti, Maria G. Zenti, Mika Hori, Mahmoud H. Ayesh, Sami T. Azar, Fadi F. Bitar, Akl C. Fahed, Elie M. Moubarak, Georges Nemer, Hapizah M. Nawawi, Ramón Madriz, Roopa Mehta, Arjen J. Cupido, Joep C. Defesche, M. Doortje Reijman, Jeanine E. Roeters-van Lennep, Erik S.G. Stroes, Albert Wiegman, Linda Zuurbier, Khalid Al-Waili, Fouzia Sadiq, Krzysztof Chlebus, Mafalda Bourbon, Isabel M. Gaspar, Katarina S. Lalic, Marat V. Ezhov, Andrey V. Susekov, Urh Groselj, Min-Ji Charng, Weerapan Khovidhunkit, Melih Aktan, Bulent B. Altunkeser, Sinan Demircioglu, Melis Kose, Cumali Gokce, Osman Ilhan, Meral Kayikcioglu, Leyla G. Kaynar, Irfan Kuku, Erdal Kurtoglu, Harika Okutan, Osman I. Ozcebe, Zafer Pekkolay, Saim Sag, Osman Z. Salcioglu, Ahmet Temizhan, Mustafa Yenercag, Mehmet Yilmaz, Hamiyet Yilmaz Yasar, Olena Mitchenko, Alexander R.M. Lyons, Christophe A.T. Stevens, Julie A. Brothers, Lisa C. Hudgins, Christina Nguyen, Rano Alieva, Aleksandr Shek, Doan-Loi Do, Ngoc-Thanh Kim, Hong-An Le, Thanh-Tung Le, Mai-Ngoc T. Nguyen, Thanh-Huong Truong, Dirk J. Blom, Frederick J. Raal, VU University medical center, Tromp T.R., Hartgers M.L., Hovingh G.K., Vallejo-Vaz A.J., Ray K.K., Soran H., Freiberger T., Bertolini S., Harada-Shiba M., Blom D.J., Raal F.J., Cuchel M., Bertolini S.A., Pang J., Watts G.F., Greber-Platzer S., Maser M., Stulnig T.M., Ebenbichler C.F., Bin Thani K., Cassiman D., Descamps O.S., Rymen D., Witters P., Santos R.D., Brunham L.R., Francis G.A., Genest J., Hegele R.A., Kennedy B.A., Ruel I., Sherman M.H., Jiang L., Wang L., Reiner Z., Blaha V., Ceska R., Dvorakova J., Dlouhy L., Horak P., Soska V., Tichy L., Urbanek R., Vaverkova H., Vrablik M., Zemek S., Zlatohlavek L., Emil S., Naguib T., Reda A., Beliard S., Bruckert E., Gallo A., Elisaf M.S., Kolovou G., Cohen H., Durst R., Dann E.J., Elis A., Hussein O., Leitersdorf E., Schurr D., Setia N., Verma I.C., Alareedh M.D., Al-Khnifsawi M., Abdalsahib Al-Zamili A.F., Rhadi S.H., Shaghee F.K., Arca M., Averna M., Bartuli A., Bucci M., Buonuomo P.S., Calabro P., Calandra S., Casula M., Catapano A.L., Cefalu A.B., Cicero A.F.G., D'Addato S., D'Erasmo L., Di Costanzo A., Fasano T., Gazzotti M., Giammanco A., Iannuzzo G., Ibba A., Negri E.A., Pasta A., Pavanello C., Pisciotta L., Rabacchi C., Ripoli C., Sampietro T., Sbrana F., Sileo F., Suppressa P., Tarugi P., Trenti C., Zenti M.G., Hori M., Ayesh M.H., Azar S.T., Bitar F.F., Fahed A.C., Moubarak E.M., Nemer G., Nawawi H.M., Madriz R., Mehta R., Cupido A.J., Defesche J.C., Reijman M.D., Roeters-van Lennep J.E., Stroes E.S.G., Wiegman A., Zuurbier L., Al-Waili K., Sadiq F., Chlebus K., Bourbon M., Gaspar I.M., Lalic K.S., Ezhov M.V., Susekov A.V., Groselj U., Charng M.-J., Khovidhunkit W., Aktan M., Altunkeser B.B., Demircioglu S., Kose M., Gokce C., Ilhan O., Kayikcioglu M., Kaynar L.G., Kuku I., Kurtoglu E., Okutan H., Ozcebe O.I., Pekkolay Z., Sag S., Salcioglu O.Z., Temizhan A., Yenercag M., Yilmaz M., Yilmaz Yasar H., Mitchenko O., Lyons A.R.M., Stevens C.A.T., Brothers J.A., Hudgins L.C., Nguyen C., Alieva R., Shek A., Do D.-L., Kim N.-T., Le H.-A., Le T.-T., Nguyen M.-N.T., Truong T.-H., University of Amsterdam, University of Pennsylvania, European Atherosclerosis Society, Experimental Vascular Medicine, Graduate School, Vascular Medicine, ACS - Atherosclerosis & ischemic syndromes, Human Genetics, Paediatric Metabolic Diseases, ACS - Diabetes & metabolism, AGEM - Amsterdam Gastroenterology Endocrinology Metabolism, ACS - Heart failure & arrhythmias, R Tromp, Tycho, L Hartgers, Merel, Kees Hovingh, G, J Vallejo-Vaz, Antonio, K Ray, Kausik, Soran, Handrean, Freiberger, Toma, A Bertolini, Stefano, Harada-Shiba, Mariko, Pang, Jing, F Watts, Gerald, Greber-Platzer, Susanne, Mäser, Martin, M Stulnig, Thoma, F Ebenbichler, Christoph, Bin Thani, Khalid, Cassiman, David, S Descamps, Olivier, Rymen, Daisy, Witters, Peter, D Santos, Raul, R Brunham, Liam, A Francis, Gordon, Genest, Jacque, A Hegele, Robert, A Kennedy, Brooke, Ruel, Isabelle, H Sherman, Mark, Jiang, Long, Wang, Luya, Reiner, Željko, Blaha, Vladimir, Ceska, Richard, Dvorakova, Jana, Dlouhy, Lubomir, Horak, Pavel, Soska, Vladimir, Tichy, Luka, Urbanek, Robin, Vaverkova, Helena, Vrablik, Michal, Zemek, Stanislav, Zlatohlavek, Luka, Emil, Sameh, Naguib, Tarek, Reda, Ashraf, Béliard, Sophie, Bruckert, Eric, Gallo, Antonio, S Elisaf, Mose, Kolovou, Genovefa, Cohen, Hofit, Durst, Ronen, J Dann, Eldad, Elis, Avishay, Hussein, Osama, Leitersdorf, Eran, Schurr, Daniel, Setia, Nitika, C Verma, Ishwar, D Alareedh, Mohammed, Al-Khnifsawi, Mutaz, F Abdalsahib Al-Zamili, Ali, H Rhadi, Sabah, K Shaghee, Foaad, Arca, Marcello, Averna, Maurizio, Bartuli, Andrea, Bucci, Marco, S Buonuomo, Paola, Calabrò, Paolo, Calandra, Sebastiano, Casula, Manuela, L Catapano, Alberico, B Cefalù, Angelo, G Cicero, Arrigo F, D'Addato, Sergio, D'Erasmo, Laura, Di Costanzo, Alessia, Fasano, Tommaso, Gazzotti, Marta, Giammanco, Antonina, Iannuzzo, Gabriella, Ibba, Anastasia, A Negri, Emanuele, Pasta, Andrea, Pavanello, Chiara, Pisciotta, Livia, Rabacchi, Claudio, Ripoli, Carlo, Sampietro, Tiziana, Sbrana, Francesco, Sileo, Fulvio, Suppressa, Patrizia, Tarugi, Patrizia, Trenti, Chiara, G Zenti, Maria, Hori, Mika, H Ayesh, Mahmoud, T Azar, Sami, F Bitar, Fadi, C Fahed, Akl, M Moubarak, Elie, Nemer, George, M Nawawi, Hapizah, Madriz, Ramón, Mehta, Roopa, J Cupido, Arjen, C Defesche, Joep, Doortje Reijman, M, E Roeters-van Lennep, Jeanine, G Stroes, Erik S, Wiegman, Albert, Zuurbier, Linda, Al-Waili, Khalid, Sadiq, Fouzia, Chlebus, Krzysztof, Bourbon, Mafalda, M Gaspar, Isabel, S Lalic, Katarina, V Ezhov, Marat, V Susekov, Andrey, Groselj, Urh, Charng, Min-Ji, Khovidhunkit, Weerapan, Aktan, Melih, B Altunkeser, Bulent, Demircioglu, Sinan, Kose, Meli, Gokce, Cumali, Ilhan, Osman, Kayikcioglu, Meral, G Kaynar, Leyla, Kuku, Irfan, Kurtoglu, Erdal, Okutan, Harika, I Ozcebe, Osman, Pekkolay, Zafer, Sag, Saim, Z Salcioglu, Osman, Temizhan, Ahmet, Yenercag, Mustafa, Yilmaz, Mehmet, Yilmaz Yasar, Hamiyet, Mitchenko, Olena, M Lyons, Alexander R, T Stevens, Christophe A, A Brothers, Julie, C Hudgins, Lisa, Nguyen, Christina, Alieva, Rano, Shek, Aleksandr, Do, Doan-Loi, Kim, Ngoc-Thanh, Le, Hong-An, Le, Thanh-Tung, T Nguyen, Mai-Ngoc, Truong, Thanh-Huong, J Blom, Dirk, J Raal, Frederick, and Cuchel, Marina

Subjects
Adult, Male, Homozygous Familial Hypercholesterolemia, Adolescent, retrospective study, CHILDREN, Doenças Cardio e Cérebro-vasculares, Cohort Studies, Young Adult, Medicine, General & Internal, General & Internal Medicine, Cardiovascular Disease, Humans, Registries, LIPOPROTEIN-APHERESIS, Child, 11 Medical and Health Sciences, Retrospective Studies, Homozygous Familial Hypercholesterolaemia International Clinical Collaborators, Science & Technology, GUIDANCE, clinical characteristic, EVOLOCUMAB, Homozygous familial hypercholesterolemia, Worldwide, Therapies, Cardiovascular disease, General Medicine, CARE, OPEN-LABEL, EFFICACY, INSIGHTS, Child, Preschool, outcome, Female, genetic, Familial Hypercholesterolaemia, Life Sciences & Biomedicine
Abstract

[Background]: Homozygous familial hypercholesterolaemia (HoFH) is a rare inherited disorder resulting in extremely elevated low-density lipoprotein cholesterol levels and premature atherosclerotic cardiovascular disease (ASCVD). Current guidance about its management and prognosis stems from small studies, mostly from high-income countries. The objective of this study was to assess the clinical and genetic characteristics, as well as the impact, of current practice on health outcomes of HoFH patients globally., [Methods]: The HoFH International Clinical Collaborators registry collected data on patients with a clinical, or genetic, or both, diagnosis of HoFH using a retrospective cohort study design. This trial is registered with ClinicalTrials.gov, NCT04815005., [Findings]: Overall, 751 patients from 38 countries were included, with 565 (75%) reporting biallelic pathogenic variants. The median age of diagnosis was 12∙0 years (IQR 5∙5–27∙0) years. Of the 751 patients, 389 (52%) were female and 362 (48%) were male. Race was reported for 527 patients; 338 (64%) patients were White, 121 (23%) were Asian, and 68 (13%) were Black or mixed race. The major manifestations of ASCVD or aortic stenosis were already present in 65 (9%) of patients at diagnosis of HoFH. Globally, pretreatment LDL cholesterol levels were 14∙7 mmol/L (IQR 11∙6–18∙4). Among patients with detailed therapeutic information, 491 (92%) of 534 received statins, 342 (64%) of 534 received ezetimibe, and 243 (39%) of 621 received lipoprotein apheresis. On-treatment LDL cholesterol levels were lower in high-income countries (3∙93 mmol/L, IQR 2∙6–5∙8) versus non-highincome countries (9∙3 mmol/L, 6∙7–12∙7), with greater use of three or more lipid-lowering therapies (LLT; highincome 66% vs non-high-income 24%) and consequently more patients attaining guideline-recommended LDL cholesterol goals (high-income 21% vs non-high-income 3%). A first major adverse cardiovascular event occurred a decade earlier in non-high-income countries, at a median age of 24∙5 years (IQR 17∙0–34∙5) versus 37∙0 years (29∙0–49∙0) in high-income countries (adjusted hazard ratio 1∙64, 95% CI 1∙13–2∙38)., [Interpretation]: Worldwide, patients with HoFH are diagnosed too late, undertreated, and at high premature ASCVD risk. Greater use of multi-LLT regimens is associated with lower LDL cholesterol levels and better outcomes. Significant global disparities exist in treatment regimens, control of LDL cholesterol levels, and cardiovascular event-free survival, which demands a critical re-evaluation of global health policy to reduce inequalities and improve outcomes for all patients with HoFH., Amsterdam University Medical Centers, Location Academic Medical Center; Perelman School of Medicine at the University of Pennsylvania; and European Atherosclerosis Society

Published
2022
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