Immunological and virological mechanisms of vaccine-mediated protection against SIV and HIV.
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A major challenge for the development of a highly effective AIDS vaccine is the identification of mechanisms of protective immunity. To address this question, we used a nonhuman primate challenge model with simian immunodeficiency virus (SIV). We show that antibodies to the SIV envelope are necessary and sufficient to prevent infection. Moreover, sequencing of viruses from breakthrough infections revealed selective pressure against neutralization-sensitive viruses; we identified a two-amino-acid signature that alters antigenicity and confers neutralization resistance. A similar signature confers resistance of human immunodeficiency virus (HIV)-1 to neutralization by monoclonal antibodies against variable regions 1 and 2 (V1V2), suggesting that SIV and HIV share a fundamental mechanism of immune escape from vaccine-elicited or naturally elicited antibodies. These analyses provide insight into the limited efficacy seen in HIV vaccine trials.
Amino Acid Sequence
Molecular Sequence Data
Simian Acquired Immunodeficiency Syndrome
Simian Immunodeficiency Virus
env Gene Products, Human Immunodeficiency Virus
Published Version (Please cite this version)10.1038/nature12893
Publication InfoAlam, S Munir; Bailer, RT; Buzby, AP; Denny, Thomas Norton; Ferrari, Guido; Fischer, W; ... Yang, Z-Y (2014). Immunological and virological mechanisms of vaccine-mediated protection against SIV and HIV. Nature, 505(7484). pp. 502-508. 10.1038/nature12893. Retrieved from http://hdl.handle.net/10161/14719.
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Professor in Medicine
Research Interests. Biophysical analysis of coreceptor modulation of TCR-MHC interactions. One of our research interests is to study the molecular mechanisms of T cell recognition. We have particular interest in understanding the trimolecular interactions between membrane bound T cell receptor (TCR-CD3 complex) and its ligand, the peptide-MHC complex (pMHC), and co-receptor molecules. We are using different biophysical approaches which include surface plasmon resonance, isothermal titr
Professor in Medicine
Thomas N. Denny, MSc, M.Phil, is the Chief Operating Officer of the Duke Human Vaccine Institute (DHVI) and the Center for HIV/AIDS Vaccine Immunology (CHAVI), and a Professor of Medicine in the Department of Medicine at Duke University Medical Center. He is also an Affiliate Member of the Duke Global Health Institute. He has recently been appointed to the Duke University Fuqua School of Business Health Sector Advisory Council. Previously, he was an Associate Professor of Pathology, Laboratory M
Associate Professor of Surgery
The activities of the Ferrari Laboratory are based on both independent basic research and immune monitoring studies. The research revolves around three main areas of interest: class I-mediated cytotoxic CD8+ T cell responses, antibody-dependent cellular cytotoxicity (ADCC), gene expression in NK and T cellular subsets upon infection with HIV-1. With continuous funding over the last 11 years from the NIH and Bill & Melinda Gates Foundation along with many other productive collaborations wi
Associate Professor in Surgery
Professor of Surgery
Dr. Montefiori is Professor and Director of the Laboratory for AIDS Vaccine Research and Development in the Department of Surgery, Division of Surgical Sciences, Duke University Medical Center. His major research interests are viral immunology and AIDS vaccine development, with a special emphasis on neutralizing antibodies. One of his highest priorities is to identify immunogens that generate broadly cross-reactive neutralizing antibodies for inclusion in HIV vaccines. Many aspects of the
Professor in Surgery
Research in the Tomaras Laboratory in the Duke Human Vaccine Institute and Departments of Surgery, Immunology, and Molecular Genetics and Microbiology at Duke University Medical Center, focuses on the identification of immune correlates of protection for preventative vaccines and identification of the mechanisms responsible for potent inhibition of human pathogens.
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