10 results on '"Lungay, Victor"'
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2. Genome Sequences of Five Arenaviruses from Pygmy Mice (Mus minutoides) in Sierra Leone
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Vucak, Matej, Bangura, James, Ghersi, Bruno M., Nichols, Jenna, Hughes, Joseph, da Silva Filipe, Ana, Tremeau-Bravard, Alexandre, Wolking, David J., Amara, Emmanuel, Bangura, Abdulai, Kanu, Marilyn C., Kanu, Osman T., Kargbo, Dickson, Lavalie, Edwin G., Lungay, Victor, Robert, Willie, Turay, Mohamed, Fornie, Steven, Samba, Thomas T., Sesay, Bankolay B., Swaray, Patrick, Vandi, Mohamed A., Bah, Mohamed Alpha, Mansaray, Andrew A., Bird, Brian H., and Davison, Andrew J.
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Immunology and Microbiology (miscellaneous) ,viruses ,Genetics ,Molecular Biology - Abstract
The genome sequences of five strains of a mammarenavirus were assembled from metagenomic data from pygmy mice ( Mus minutoides ) captured in Sierra Leone. The nearest fully sequenced relatives of this virus, which was named Seli virus, are lymphocytic choriomeningitis virus, Lunk virus, and Ryukyu virus.
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- 2022
3. Socializing One Health: an innovative strategy to investigate social and behavioral risks of emerging viral threats
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Saylors, Karen, Wolking, David J., Hagan, Emily, Martinez, Stephanie, Francisco, Leilani, Euren, Jason, Olson, Sarah H., Miller, Maureen, Fine, Amanda E., Thanh, Nga Nguyen Thi, Tran Minh, Phuc, Kalengkongan, Jusuf D., Kusumaningrum, Tina, Latinne, Alice, Pamungkas, Joko, Safari, Dodi, Saputro, Suryo, Bamba, Djeneba, Coulibaly, Kalpy Julien, Dosso, Mireille, Laudisoit, Anne, N'guettia Jean, Kouassi Manzan, Dutta, Shusmita, Islam, Ariful, Shano, Shahanaj, Mwanzalila, Mwokozi I., Trupin, Ian P., Gbakima, Aiah, Bangura, James, Yondah, Sylvester T., Karmacharya, Dibesh, Shrestha, Rima D., Kamta, Marcelle Annie Matsida, Mouiche, Mohamed Moctar Mouliom, Ndolo, Hilarion Moukala, Niama, Fabien Roch, Onikrotin, Dionne, Daszak, Peter, Johnson, Christine K., Mazet, Jonna A. K., Abaneh, Ola, Ababneh, Mustafa, Rafia, Jum, Sukor, Abd, Abdullah, Mohd Lufti, Abedin, Josefina, Abu-Basha, Ehab, Ali, Mohamed, Beal Akoundze, Junior, Akpaki, Joel, Al Hanandeh, Sief Addeen, Al Omari, Bilal, Al Shakil, Abdullah, Al-Zghoul, Mohammed, Albart, Stephenie Ann, Alshammari, Abdullah, Amarneh, Basil H., Ampofo, William, Andrew, Victoria, Ahn, Dao Le, Ankhanbaatar, Ulaankhuu, Anthony, Simon, Antonjaya, Ungke, Araya, Kidan, Arku, Jallah, Arshat, Norsharina, Asigbee, Theodore, Aung, Ohnmar, Awuni, Joseph, Ayukebong, James, Azian, Mohammed, Aziz, Nor Adilah, Ba, Aminata, Bassan, Ganzorig, Bagato, Ola, Bamba, Aboubacar, Bamba, Djenba, Barkhasbaatar, Ariunbaatar, Barrera, June, Basaraba, Cale, Bel-nono, Samuel, Belaganahalli, Manjunatha, Belay, Desalgen, Belkharia, Jaber, Binol, Ridzki M. F., Bird, Brian, Bista, Manisha, Biswas, Pitu, Blake, Matthew, Boatemaa, Linda, Bonason, Margret, Brandful, James, Brown, Joseph, Brownstein, John, Camara, Mamadi, Camara, Salif, Chai, Daniel, Chakraborty, Debapriyo, Chale, Hannah, Chaudhary, Ashok, Chea, Sokha, Chmura, Aleksei, Goossens, Benoit, Chow, Andrew, Churchill, Carolina, Commey, Abraham, Couacy-Hymann, Emmanuel, Coulibaly, Julien Kalpy, Cranfield, Michael, Damanik, Wirda, Damdinjav, Batchullum, Danial, Norhidayah, Dasak, Peter, David, Runie, Dawson, Patrick, Dembele, Arjouma, Deme, Awa, Desmond, James, Dewantari, Arghianditya Kresno, Dhanota, Jaseet, Dhole, Tapan, Diep, Nguyen Thi, Dionkounda, Artistide, Diop, Gaye Laye, Dodd, Kimberly, Dogby, Otilia, Dorjnyam, Tumendemberel, Dosso, Mireielle, Doumbouya, Kalil, Doumbouya, Mohamed Idriss, Doyle, Megan, Dramou, Simone, Drazenovich, Tracy, Duc Ahn, Dang, Duc Luu, Bach, Duendkae, Prateep, Duoc, Vu Trong, Duong, Tran Nhu, Duong, Veasna, Dursman, Huda, Dussart, Phillipe, Ee, Tan Jun, Ekiri, Abel, El Rifay, Amira S., El Shesheny, Rabel, El Taween, Ahmed N., Emmanuel, Zena Babu, Epstein, Jonathan H., Evans, Tierra Smiley, Fahmawi, Alaa, Fahn, Simeon, Feferholtz, Yasha, Ferdous, Jinnat, Fine, Amanda, Flora, Meerjady, Fransisco, Leilani, Fui Fui, Lem, Gabourie, Taylor, Gani, Millawati, Garbo, Michael, Gardner, Nicole, Gbamele, Marie, Ge, Xingyi, Gee, Lee Heng, Genovese, Brooke, Gibson, Alexandra, Gilardi, Kirsten, Gilbert, Martin, Gillis, Amethyst, Ginsos, Andrew, Godji Gnabro, Privat, Goldstein, Tracey, Gomaa, Moktar, Gomis, Jules, Gonzalez, Kevin, Grange, Zoe, Greig, Denise, Grodus, Michael, Gueu, Kpon Kakeuma Romeo, Gutierrez, Leticia, Haba, Dan Marcelin, Hamid, Suraya, Harris, Daniel K., Hashim, Abdul Kadir Abu, Hassan, Moushumi, Hassan, Quazar Nizamuddin, He, Qun, Hemachudha, Thiravat, Henry, Helen, Herbert, Ronald, Hijazeen, Zaidoun, Hilarion, Moukala Ndolo, Hill, Rebecca, Hoa, Nguyen Thi, Horwood, Paul, Hossain, Md. Enayet, Hossain, Saddam, Htun, Moh Moh, Hu, Ben, Hughes, Tom, Hul, Vibol, Van, Vo, Hussein, Fatima, Indola, Ghislain Dzeret, Iskandriati, Diah, Islam, Md. Tarikul, Islam, Shariful, Isnaim Ismail, Mohd, Ismail, Zuhair Bani, Iyanya, Jacques, Jaimin, Joel Judson, Jambai, Amara, Japning, Jeffrine Rovie Ryan, Japrin, Alexter, Jean Louis, Frantz, Joe, Titus, Johnson, Erica, Joly, Damien, Joshi, Jyotsna, Kalengkongan, Jusuf, Kalivogui, Douokoro, Kamara-Chieyoe, Nenneh, Kamau, Joseph, Kambale Syaluha, Eddy, Kandeil, Ahmed, Kane, Yogouba, Karesh, William, Kargo, Kandeh, Kasenda, Novie, Kayali, Ghazi, Kayed, Ahmed S., Kazwala, Rudovick, Ke, Changwen, Keates, Lucy, Kebede, Nigatu, Khamphaphongphane, Bouaphanh, Kheong, Chong Chee, Kilonzo, Christopher, Koffa, Ma-Sue, Kollie, Amos G., Kondiano, Marcel Sidik, Koropo, Michel, Kouamé Kouakou, Valere, Kouassi Koffi, Eugene, Kourouma, Mariam, Koutate, Abdoulaye Ousmane, Kowel, Citra Liv, Krou, Hermann Assemien, Kumakamba, Charles, Kutkat, Omnia, Lamah, François, Lan, Nguyen Thi, Lane, Jennifer, Lange, Christian, Larmouth, Emmanuel, Le Doux, Joseph Diffo, Leasure, Elizabeth, Leasure, Katherine, LeBreton, Mat, Lee, Jimmy, Lee, Helen, Lee, Mei Ho, Leno, Amara, Li, Hongying, Liang, Eliza, Liang, Neal, Lim, Dorothy, Lipkin, W. Ian, Liu, Jun, Lo, Modou Moustafa, Lojivis, Leonoris, Long, Nguyen Van, Lucas, Ashley, Lukusa, Jean Paul, Lungay, Victor, Lushima, Shongo, Lutwama, Julius, Ma, Wenjun, Machalaba, Catherine, Maganga, Grace, Magesa, Walter Simon, Mahmoud, Sara H., Makuwa, Maria, Makweta, Asha, Mamun, Abdullah Al, Manandhar, Prajwol, Maneeorn, Patarapol, Mann, Harjeet, Maomy, Bhele, Maptue, Victorine, Mathew, Alice, Mavoungou, Yanne Vanessa, Maw, Min Thein, Mazet, Jonna, Mbala, Placide, Mbuba, Emmanuel, Mbunwe, Eric, McIver, David, Mendelsohn, Emma, Miegakanda, Valchy Bel-Bebi, Minh, Phan Quang, Mkali, Happy, Moatasim, Yassmin, Mombouli, Jean Vivien, Monagin, Corina, Montecino-Latorre, Diego, Mossoun Mossoun, Arsene, Mostafa, Ahmed, Mouiche, Moctar, Mpassi, Romain Bagamboula, Msigwa, Alphonce, Mudakikwa, Antoine, Mugok, Laura Benedict, Mulembakani, Prime, Murray, Suzan, Musa, Fakhrul Hatta, Musabimana, Pacifique, Mutura, Samson, Mwamlima, Tunu, Mwanzanilla, Mwokozi, Myaing, Tin Tin, Myat, Theingi Win, Myo Chit, Aung, N’faly, Magassouba, N’Guettia, Manzan Jean, N’télo, Anatole, Nakimera, Sylivia, Nam, Vu Sinh, Napit, Rajindra, Nathan, Senthilvel K. S. S., Navarrete-Macias, Isamara, Ndebe, Kortu M., Ndiaye, Amadou, Ndiaye, Daouda, Negash, Yohannes, Nga, Nguyen Thi Thanh, Ngay, Ipos, Ngoc, Pham Thi Bich, Niama, Fabien, Nina, Rock Aimé, Niyonzima, Schadrack, Nkom, Felix, Nkoua, Cynthia, Noordin, Noorliza, Noviana, Rachmitasari, Nwobegahay, Julius, Nziza, Julius, O’Rourke, Daniel, O’Rourke, Tammie, Obodai, Evangeline, Okello Okwir, Ricky, Olival, Kevin, Olson, Sarah, Olva, Onkirotin Dionne, Ontiveros, Victoria, Opook, Fernandes, Panchadcharam, Chandrawathani, Pandit, Pranav, Parra, Henri-Joseph, Phuc, Tran Minh, Phuong, Nguyen Thanh, Poultolnor, Jackson Y., Pradhan, Saman, Preston, Eunah Cho, Pruvot, Mathieu, Purevtseren, Dulam, Puri, Dhiraj, Quang, Le Tin Vinh, Rachmitasari, Novie, Rahman, Kaisar, Rahman, Mizanur, Rahman, Mohammed Ziaur, Rahman, Mustafizur, Ramirez, Diana, Randhawa, Nistara, Raut, Samita, Rosario, Joseph, Ross, Albert, Ross, Noam, Rostal, Melinda, Roualdes, Pamela, Rubin, Eddy, Rumi, Aftab Uddin, Rundi, Christina, Sackie, Melkor, Sajali, Zikankuba, Samuels, Sandra G, Sango, Mathias, Saptu, Ammar Rafidah, Saraka, Daniel N’guessan, Sartee, Alvis A., Sayandouno, Sia Alida, Seck, Mame Cheikh, Sedor, Victoria, Sharma, Ajay Narayan, Sharminie, Velsri, Shehata, Mahmoud M., Sheikh, Gafur, Shi, Zhengli, Shiilegdamba, Enkhtuvshin, Shrestha, Bishwo, Shrestha, Rima, Sidibey, Mohammed, Silithammavong, Soubanh, Simon, Daniel, Sion, Emilly, Sipangkui, Symphorosa, Sitam, Frankie Thomas, Smith, Brett, Smith, Bridgette, Smith, Woutrina, Sodnom, Batsikhan, Ssebide, Benard, Suleiman, Maria, Sullivan, Ava, Sungif, Nur Amirah, Suu-Ire, Richard, Sy, Mouhamed, Takuo, Jean Michel, Talafha, Hani, Tamoufe, Ubald, Tetteh, Emmanuel, Than Toe, Aung, Thanda, Lanash, Thanh Long, Ngo, Thein, Wai Zin, Theppangna, Watthana, Thinh, Nguyen Duc, Thuy, Hoang Bich, Thuy, Nguyen Thu, Togami, Eri, Tolno, Moise Bendoua, Tolovou, Kevin, Topani, Rahmat, Tremeau-Bravard, Alexandre, Trupin, Ian, Tumushime, Jean Claude, Tun, Kyaw Yan Naing, Turay, Joseph, Uddin, Helal, Uhart, Marcela, Ureda, Nicole, Valitutto, Marc, Verasahib, Khebir, Vodzak, Megan, Wacharapluesadee, Supaporn, Wahad, Mohammad Yuery Wazlan Abdul, Watson, Brooke, Wells, Heather, White, Allison, Willoughby, Anna, Wiyatno, Ageng, Wolking, David, Yang, Xinglou, Yao, Lim Ming, Yombouno, Sayon, Young, Cristin, Zambrana-Torrelio, Carlos, Zeid, Zahidah Izzati, Zghoul, Ghadeer, Zhang, Libiao, Zhang, Yunzhi, Zhu, Guangjian, Zimmerman, Dawn, Zoumarou, Daba, Aguirre, Alonso, Aguirre, Luis, Akongo, Mark-Joel, Alandia Robles, Erika, Ambu, Laurentius, Ayala Aguilar, Glenda, Barcena, Luis, Barradas, Rosario, Basir, Misliah Mohamad, Bogich, Tiffany, Bounga, Gerard, Buchy, Philippe, Bunn, David, Byaruba, Denis, Cameron, Ken, Carroll, Dennis, Cavero, Nancy, Cespedes, Manuel, Che, Xiaoyu, Chiu, Charles, Chor, Kimashalen, Clements, Andrew, Dary Acevedo, Luz, de Almeida Campos, Angelica, De La Puente, Micaela, de Lamballerie, Xavier, de Paula, Catia, Delwart, Eric, Diffo Le Doux, Joseph, Doyle-Capitman, Catherine, Durigon, Edison, Fair, Joseph, Ferrer-Paris, José R., Formenty, Pierre, Galarza, Isabel, Garcia, Joel, Grard, Gilda, Greatorex, Zoe, Harris, Laurie, Hitchens, Peta, Ho, Mei, Hosseini, Parviez, In, Samath, Iñíguez, Volga, Jain, Komal, Jamaluddin, Abd. Aziz, Johnson, Christine, Jones, Kate, Joyner, Priscilla, Kaba, Serge, Kambale, Eddy, Kataregga, Abdulhameed, Kelly, Terra, Khammavong, Kongsy, Kilpatrick, A. Marm, Laimun, Samsir, Lee, Mei-Ho, LeRoy, Eric, Levinson, Jordan, Levy, Marc, Limachi, Rolando, Loh, Elizabeth, Lowenstine, Linda J., Luis Mollericona, José, Maganga, Ruth, Malakalinga, Joseph, Manhas, Melissa, Marra, Pete, Mbabazi, Rachael, Medellín, Rodrigo, Mendoza, Patricia, Miller, Sireeda, Miranda, Flavia, Mitchell, Megan, Mohamed, Ramlan, Mollard, Debbie, Morse, Stephen, Mouellet, Wivine, Moya, Isabel, Murillo, Yovanna, Murray, Kris, Muyembe Tamfum, Jean-Jacques, Nassar, Fernando, Nathan, Sen, Nsengimana, Olivier, Ogg Keatts, Lucy, Ojeda-Flore, Rafael, Okwir Okello, Ricky, Ondzie, Alain, Paweska, Janusz, Pereira, Alisa, Pereira, Victoria, Perez, Alberto, Perez, Jocelyn, Phon, Simorn, Reed, Patricia, Rejmanek, Dan, Rico, Oscar, Rivera, Rosario, Romero, Monica, Roy, Celina, Saepuloh, Uus, Schneider, Brad, Schwind, Jessica, Singhalath, Sinpakhome, Smith, Kristine, Suárez, Fabiola, Suzan, Gerardo, Thanh Nga, Nguyen Thi, Thomas, Kate, Ticona, Herminio, VanWormer, Elizabeth, Villar, Sandra, Weisman, Wendy, Westfall, Michael, Whittier, Chris, Wicker, Leanne, Wolfe, Nathan, Yang, Angela, Zariquiey, Carlos, Zhang, Shu-Yi, Zorine Nkouants, Baudelaire, Zainuddin, Zainal, Chrisman, Cara, Pabst, August, Shek, Amalhin, and Trostle, Murray
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0301 basic medicine ,Behavioral risk ,medicine.medical_specialty ,Behavioural sciences ,Disease ,Community integration ,Basic Behavioral and Social Science ,03 medical and health sciences ,0302 clinical medicine ,Clinical Research ,2.3 Psychological ,Behavioral and Social Science ,Agency (sociology) ,medicine ,2.2 Factors relating to the physical environment ,GE1-350 ,Aetiology ,One health ,Social science research ,business.industry ,Prevention ,Research ,Public health ,PREDICT Consortium ,Public relations ,Focus group ,Environmental sciences ,Good Health and Well Being ,030104 developmental biology ,One Health ,Multi-disciplinary surveillance ,social and economic factors ,Public aspects of medicine ,RA1-1270 ,Infection ,Psychology ,International development ,business ,030217 neurology & neurosurgery - Abstract
In an effort to strengthen global capacity to prevent, detect, and control infectious diseases in animals and people, the United States Agency for International Development’s (USAID) Emerging Pandemic Threats (EPT) PREDICT project funded development of regional, national, and local One Health capacities for early disease detection, rapid response, disease control, and risk reduction. From the outset, the EPT approach was inclusive of social science research methods designed to understand the contexts and behaviors of communities living and working at human-animal-environment interfaces considered high-risk for virus emergence. Using qualitative and quantitative approaches, PREDICT behavioral research aimed to identify and assess a range of socio-cultural behaviors that could be influential in zoonotic disease emergence, amplification, and transmission. This broad approach to behavioral risk characterization enabled us to identify and characterize human activities that could be linked to the transmission dynamics of new and emerging viruses. This paper provides a discussion of implementation of a social science approach within a zoonotic surveillance framework. We conducted in-depth ethnographic interviews and focus groups to better understand the individual- and community-level knowledge, attitudes, and practices that potentially put participants at risk for zoonotic disease transmission from the animals they live and work with, across 6 interface domains. When we asked highly-exposed individuals (ie. bushmeat hunters, wildlife or guano farmers) about the risk they perceived in their occupational activities, most did not perceive it to be risky, whether because it was normalized by years (or generations) of doing such an activity, or due to lack of information about potential risks. Integrating the social sciences allows investigations of the specific human activities that are hypothesized to drive disease emergence, amplification, and transmission, in order to better substantiate behavioral disease drivers, along with the social dimensions of infection and transmission dynamics. Understanding these dynamics is critical to achieving health security--the protection from threats to health-- which requires investments in both collective and individual health security. Involving behavioral sciences into zoonotic disease surveillance allowed us to push toward fuller community integration and engagement and toward dialogue and implementation of recommendations for disease prevention and improved health security. Supplementary Information The online version contains supplementary material available at 10.1186/s42522-021-00036-9.
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- 2021
4. High heart rate at admission as a predictive factor of mortality in hospitalized patients with Lassa fever: An observational cohort study in Sierra Leone
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Wauquier, Nadia, primary, Couffignal, Camille, additional, Manchon, Pauline, additional, Smith, Elisabeth, additional, Lungay, Victor, additional, Coomber, Moinya, additional, Weisenfluh, Lauren, additional, Bangura, James, additional, Khan, Sheik Humarr, additional, Jambai, Amara, additional, Gbakima, Aiah, additional, Yun, Nadezda, additional, Paessler, Slobodan, additional, Schoepp, Randal, additional, Morse, Stephen S., additional, Gonzalez, Jean-Paul, additional, Fair, Joseph, additional, Mentré, France, additional, and Vieillard, Vincent, additional
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- 2020
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5. HLA-C-restricted viral epitopes are associated with an escape mechanism from KIR2DL2+ NK cells in Lassa virus infection
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Wauquier, Nadia, primary, Petitdemange, Caroline, additional, Tarantino, Nadine, additional, Maucourant, Christopher, additional, Coomber, Moinya, additional, Lungay, Victor, additional, Bangura, James, additional, Debré, Patrice, additional, and Vieillard, Vincent, additional
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- 2019
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6. Serologic evidence of human orthopoxvirus infections in Sierra Leone
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Goba Augustine, Lungay Victor K, Robert Willie, Kanneh Lansana D, Fonnie Richard, Lash RR, Reynolds Mary G, Abel Jason, MacNeil Adam, Moses Lina M, Damon Inger K, Karem Kevin, and Bausch Daniel G
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Medicine ,Biology (General) ,QH301-705.5 ,Science (General) ,Q1-390 - Abstract
Abstract Background Orthopoxviruses, including variola virus, vaccinia virus, and monkeypox virus, have previously been documented in humans in West Africa, however, no cases of human orthopoxvirus infection have been reported in the region since 1986. We conducted a serosurvey to determine whether human exposure to orthopoxviruses continues to occur in eastern Sierra Leone. Findings To examine evidence of exposure to orthopoxviruses in the Kenema District of Sierra Leone, we collected and tested sera from 1596 persons by IgG ELISA and a subset of 313 by IgM capture ELISA. Eleven persons born after the cessation of smallpox vaccination had high orthopoxvirus-specific IgG values, and an additional 6 persons had positive IgM responses. No geographic clustering was noted. Conclusions These data suggest that orthopoxviruses continue to circulate in Sierra Leone. Studies aimed at obtaining orthopoxvirus isolates and/or genetic sequences from rodents and symptomatic humans in the area are indicated.
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- 2011
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7. HLA-C-Restricted Viral Epitopes Are Associated With an Escape Mechanism From KIR2DL2 NK Cells in Lassa Virus Infection
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Wauquier, Nadia, primary, Petitdemange, Caroline, additional, Tarantino, Nadine, additional, Maucouran, Christopher, additional, Coomber, Moinya, additional, Lungay, Victor, additional, Bangura, James, additional, Debré, Patrice, additional, and Vieillard, Vincent, additional
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- 2018
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8. Understanding the Emergence of Ebola Virus Disease in Sierra Leone: Stalking the Virus in the Threatening Wake of Emergence
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Wauquier, Nadia, primary, Bangura, James, additional, Moses, Lina, additional, Humarr Khan, Sheik, additional, Coomber, Moinya, additional, Lungay, Victor, additional, Gbakie, Michael, additional, Sesay, Mohammed S.K., additional, Gassama, Ibrahim A.K., additional, Massally, James L.B., additional, Gbakima, Aiah, additional, Squire, James, additional, Lamin, Mohamed, additional, Kanneh, Lansana, additional, Yillah, Mohammed, additional, Kargbo, Kandeh, additional, Roberts, Willie, additional, Vandi, Mohammed, additional, Kargbo, David, additional, Vincent, Tom, additional, Jambai, Amara, additional, Guttieri, Mary, additional, Fair, Joseph, additional, Souris, Marc, additional, and Gonzalez, Jean Paul, additional
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- 2015
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9. Serologic evidence of human orthopoxvirus infections in Sierra Leone
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MacNeil, Adam, primary, Abel, Jason, additional, Reynolds, Mary G, additional, Lash, RR, additional, Fonnie, Richard, additional, Kanneh, Lansana D, additional, Robert, Willie, additional, Lungay, Victor K, additional, Goba, Augustine, additional, Moses, Lina M, additional, Damon, Inger K, additional, Karem, Kevin, additional, and Bausch, Daniel G, additional
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- 2011
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10. HLA-C-restricted viral epitopes are associated with an escape mechanism from KIR2DL2 + NK cells in Lassa virus infection.
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Wauquier N, Petitdemange C, Tarantino N, Maucourant C, Coomber M, Lungay V, Bangura J, Debré P, and Vieillard V
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- Antigens, Viral immunology, Cell Line, Cytotoxicity, Immunologic, Epitope Mapping methods, Genotype, HLA-C Antigens genetics, Humans, Immune Tolerance, Immunomodulation, Immunophenotyping, Lassa Fever genetics, Lassa Fever virology, Protein Binding, Receptors, KIR2DL2 genetics, Epitopes immunology, HLA-C Antigens immunology, Killer Cells, Natural immunology, Killer Cells, Natural metabolism, Lassa Fever immunology, Lassa Fever metabolism, Lassa virus immunology, Receptors, KIR2DL2 metabolism
- Abstract
Background: Lassa virus (LASV) is the etiologic agent of an acute hemorrhagic fever endemic in West Africa. Natural killer (NK) cells control viral infections in part through the interaction between killer cell immunoglobulin-like receptors (KIRs) and their ligands. LASV infection is associated with defective immune responses, including inhibition of NK cell activity in the presence of MHC-class 1
+ -infected target cells., Methods: We compared individual KIR and HLA-class 1 genotypes of 68 healthy volunteers to 51 patients infected with LASV in Sierra Leone, including 37 survivors and 14 fatalities. Next, potential HLA-C1, HLA-C2, and HLA-Bw4 binding epitopes were in silico screened among LASV nucleoprotein (NP) and envelope glycoprotein (GP). Selected 10-mer peptides were then tested in peptide-HLA stabilization, KIR binding and polyfunction assays., Findings: LASV-infected patients were similar to healthy controls, except for the inhibitory KIR2DL2 gene. We found a specific increase in the HLA-C1:KIR2DL2 interaction in fatalities (10/11) as compared to survivors (12/19) and controls (19/29). We also identified that strong of NP and GP viral epitopes was only observed with HLA-C molecules, and associated with strong inhibition of degranulation in the presence of KIR2DL+ NK cells. This inhibitory effect significantly increased in the presence of the vGP420 variant, detected in 28.1% of LASV sequences., Interpretation: Our finding suggests that presentation of specific LASV epitopes by HLA-C alleles to the inhibitory KIR2DL2 receptor on NK cells could potentially prevent the killing of infected cells and provides insights into the mechanisms by which LASV can escape NK-cell-mediated immune pressure., (Copyright © 2019. Published by Elsevier B.V.)- Published
- 2019
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