Now showing items 1-13 of 13

    • Adaptive changes in HIV-1 subtype C proteins during early infection are driven by changes in HLA-associated immune pressure. 

      Treurnicht, Florette K.; Seoighe, Cathal.; Martin, Darren Patrick.; Wood, N.; Abrahams, Melissa-Rose.; de Assis Rosa, Debra.; Bredell, Helba.; Woodman, Zenda.; Hide, Winston.; Mlisana, Koleka Patience.; Abdool Karim, Salim Safurdeen.; Gray, Clive M.; Williamson, Carolyn. (Elsevier., 2009)
      It is unresolved whether recently transmitted human immunodeficiency viruses (HIV) have genetic features that specifically favour their transmissibility. To identify potential “transmission signatures”, we compared 20 ...
    • CAPRISA 004 tenofovir microbicide trial: no impact of tenofovir gel on the HIV transmission bottleneck. 

      Valley-Omar, Ziyaad.; Sibeko, Sengeziwe.; Anderson, Jeffrey A.; Goodier, Sarah A.; Werner, Lise.; Arney, Leslie.; Naranbhai, Vivek.; Treurnicht, Florette K.; Abrahams, Melissa-Rose.; Bandawe, Gama P.; Swanstrom, Ronald.; Abdool Karim, Salim Safurdeen.; Abdool Karim, Quarraisha.; Williamson, Carolyn. (Oxford University Press., 2011)
      Alterations of the genital mucosal barrier may influence the number of viruses transmitted from a human immunodeficiency virus–infected source host to the newly infected individual. We used heteroduplex tracking assay and ...
    • Case report: mechanisms of HIV elite control in two African women. 

      Moosa, Yumna.; Tanko, Ramla F.; Ramsuran, Veron.; Singh, Ravesh.; Madzivhandila, Mashudu.; Yende-Zuma, Fortunate Nonhlanhla.; Abrahams, Melissa-Rose.; Selhorst, Philippe.; Gounder, Kamini.; Moore, Penny L.; Williamson, Carolyn.; Abdool Karim, Salim Safurdeen.; Garrett, Nigel Joel.; Burgers, Wendy A. (BioMed Central., 2018)
      Abstract available in pdf.
    • Comparison of viral env proteins from acute and chronic infections with subtype C human immunodeficiency virus type 1 identifies differences in glycosylation and CCR5 utilization and suggests a new strategy for immunogen design. 

      Ping, Li-Hua.; Joseph, Sarah B.; Anderson, Jeffrey A.; Abrahams, Melissa-Rose.; Salazar-Gonzalez, Jesus F.; Kincer, Laura P.; Treurnicht, Florette K.; Arney, Leslie.; Ojeda, Suany.; Zhang, Ming.; Keys, Jessica.; Potter, E. Lake.; Chu, Haitao.; Moore, Penny L.; Salazar-Gonzalez, Maria.; Iyer, Shilpa.; Jabara, Cassandra.; Kirchherr, Jennifer.; Mapanje, Clement.; Ngandu, Nobubelo K.; Seoighe, Cathal.; Hoffman, Irving F.; Gao, Feng.; Tang, Yuyang.; Labranche, Celia.; Lee, Benhur.; Saville, Andrew.; Vermeulen, Marion.; Fiscus, Susan A.; Morris, Lynn.; Abdool Karim, Salim Safurdeen.; Haynes, Barton F.; Shaw, George M.; Korber, Bette T.; Hahn, Beatrice H.; Cohen, Myron S.; Montefiori, David C.; Williamson, Carolyn.; Swanstrom, Ronald. (American Society for Microbiology., 2013)
      Understanding human immunodeficiency virus type 1 (HIV-1) transmission is central to developing effective prevention strategies, including a vaccine.We compared phenotypic and genetic variation in HIV-1 env genes from ...
    • Decreased incidence of dual infections in South African subtype C-infected women compared to a cohort ten years earlier. 

      Woodman, Zenda.; Mlisana, Koleka Patience.; Treurnicht, Florette K.; Abrahams, Melissa-Rose.; Thebus, Ruwayhida.; Abdool Karim, Salim Safurdeen.; Williamson, Carolyn. (Mary Ann Liebert., 2011)
      Previously, we determined the incidence of dual infections in a South African cohort and its association with higher viral setpoint. Ten years later, we compare the incidence and impact of dual infections at transmission ...
    • Evolution of an HIV glycan–dependent broadly neutralizing antibody epitope through immune escape. 

      Moore, Penny L.; Gray, Elin S.; Wibmer, Constantinos Kurt.; Bhiman, Jinal N.; Nonyane, Molati.; Hermanus, Tandile.; Sheward, Daniel.; Bajimaya, Shringkhala.; Abrahams, Melissa-Rose.; Tumba, Nancy L.; Ping, Li-Hua.; Ngandu, Nobubelo K.; Abdool Karim, Quarraisha.; Abdool Karim, Salim Safurdeen.; Swanstrom, Ronald.; Seaman, Michael S.; Williamson, Carolyn.; Morris, Lynn. (Nature Publishing Group., 2012)
      Neutralizing antibodies are likely to play a crucial part in a preventative HIV-1 vaccine. Although efforts to elicit broadly cross-neutralizing (BCN) antibodies by vaccination have been unsuccessful, a minority of individuals ...
    • Genital tract inflammation during early HIV-infection predicts higher plasma viral load set point in women. 

      Roberts, Lindi.; Passmore, Jo-Ann Shelley.; Mlisana, Koleka Patience.; Williamson, Carolyn.; Little, Francesca.; Bebell, Lisa M.; Walzl, Gerhard.; Abrahams, Melissa-Rose.; Woodman, Zenda.; Abdool Karim, Quarraisha.; Abdool Karim, Salim Safurdeen. (Oxford University Press., 2011)
      Background. The biggest challenge in human immunodeficiency virus type 1 (HIV-1) prevention in Africa is the high HIV-1 burden in young women. In macaques, proinflammatory cytokine production in the genital tract is necessary ...
    • Increased memory differentiation is associated with decreased polyfunctionality for HIV but not for CMV-specific CD8+ T cells. 

      Riou, Catherine.; Treurnicht, Florette K.; Abrahams, Melissa-Rose.; Mlisana, Koleka Patience.; Liu, Michael K. P.; Goonetilleke, Nilu.; Koup, Richard.; Roederer, Mario.; Abdool Karim, Salim Safurdeen.; De Bruyn, Guy.; Williamson, Carolyn.; Gray, Clive M.; Burgers, Wendy A. (American Association of Immunologists., 2012)
      The generation of polyfunctional CD8+ T cells, in response to vaccination or natural infection, has been associated with improved protective immunity. However, it is unclear whether the maintenance of polyfunctionality is ...
    • Limited Neutralizing Antibody Specificities Drive Neutralization Escape in Early HIV-1 Subtype C Infection. 

      Moore, Penny L.; Ranchobe, Nthabeleng.; Lambson, Bronwen Elizabeth.; Gray, Elin S.; Cave, Eleanor.; Abrahams, Melissa-Rose.; Bandawe, Gama P.; Mlisana, Koleka Patience.; Abdool Karim, Salim Safurdeen.; Williamson, Carolyn.; Morris, Lynn. (Plos, 2009)
      We previously showed that HIV-1 subtype C viruses elicit potent but highly type-specific neutralizing antibodies (nAb) within the first year of infection. In order to determine the specificity and evolution of these ...
    • Quantitating the multiplicity of infection with human immunodeficiency virus type 1 subtype C reveals a non-poisson distribution of transmitted variants. 

      Abrahams, Melissa-Rose.; Anderson, Jeffrey A.; Giorgi, Elena E.; Seoighe, Cathal.; Mlisana, Koleka Patience.; Liu, Pinghuang.; Athreya, G. S.; Treurnicht, Florette K.; Keele, Brandon F.; Wood, N.; Salazar-Gonzalez, Jesus F.; Bhattacharya, Tanmoy.; Chu, Haitao.; Hoffman, Irving F.; Galvin, S.; Mapanje, Clement.; Kazembe, P.; Thebus, Ruwayhida.; Fiscus, Susan.; Hide, Winston.; Cohen, Myron S.; Abdool Karim, Salim Safurdeen.; Haynes, Barton F.; Shaw, George M.; Hahn, Beatrice H.; Korber, Bette T.; Swanstrom, Ronald.; Williamson, Carolyn. (American Society for Microbiology., 2008)
      Identifying the specific genetic characteristics of successfully transmitted variants may prove central to the development of effective vaccine and microbicide interventions. Although human immunodeficiency virus transmission ...
    • Rapid, complex adaption of transmitted HIV-1 full-length genomes in subtype C-infected individuals with differing disease progression. 

      Abrahams, Melissa-Rose.; Treurnicht, Florette K.; Ngandu, Nobubelo K.; Goodier, Sarah A.; Marais, Jinny C.; Bredell, Helba.; Thebus, Ruwayhida.; de Assis Rosa, Debra.; Seoighe, Cathal.; Abdool Karim, Salim Safurdeen.; Gray, Clive M.; Williamson, Carolyn.; Mlisana, Koleka Patience. (Wolters Kluwer Health., 2013)
      Objective(s): There is limited information on full-length genome sequences and the early evolution of transmitted HIV-1 subtype C viruses, which constitute the majority of viruses spread in Africa. The purpose of this ...
    • Replication capacity of viruses from acute infection drives HIV-1 disease progression. 

      Selhorst, Philippe.; Combrinck, Carina.; Ndabambi, Nonkululeko.; Ismail, Sherazaan D.; Abrahams, Melissa-Rose.; Lacerda, Miguel.; Samsunder, Natasha.; Garrett, Nigel Joel.; Abdool Karim, Quarraisha.; Abdool Karim, Salim Safurdeen.; Williamson, Carolyn. (American Society for Microbiology., 2017)
      Abstract available in pdf.
    • Vertical T cell immunodominance and epitope entropy determine HIV-1 escape. 

      Liu, Michael K. P.; Hawkins, Natalie.; Ritchie, Adam J.; Ganusov, Vitaly.; Whale, Victoria.; Brackenridge, Simon.; Li, Hui.; Pavlicek, Jeffrey W.; Cai, Fangping.; Abrahams, Melissa-Rose.; Treurnicht, Florette K.; Hraber, Peter.; Riou, Catherine.; Gray, Clive M.; Ferrari, Guido.; Tanner, Rachel.; Ping, Li-Hua.; Anderson, Jeffrey A.; Swanstrom, Ronald.; Cohen, Myron S.; Abdool Karim, Salim Safurdeen.; Haynes, Barton F.; Borrow, Persephone.; Perelson, Alan S.; Shaw, George M.; Hahn, Beatrice H.; Williamson, Carolyn.; Korber, Bette T.; Gao, Feng.; Self, Steven G.; McMichael, Andrew.; Goonetilleke, Nilu. (American Society for Clinical Investigation., 2012)
      HIV-1 accumulates mutations in and around reactive epitopes to escape recognition and killing by CD8+ T cells. Measurements of HIV-1 time to escape should therefore provide information on which parameters are most important ...