Staged induction of HIV-1 glycan–dependent broadly neutralizing antibodies
Journal Article
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· Science Translational Medicine
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- Duke Univ. School of Medicine, Durham, NC (United States); Duke Human Vaccine Inst., Durham, NC (United States)
- Univ. of Pennsylvania, Philadelphia, PA (United States). Perelman School of Medicine
- Brigham and Women's Hospital (Harvard Medical School), Boston, MA (United States)
- Memorial Sloan Kettering Cancer Center, New York, NY (United States)
- Duke Human Vaccine Inst., Durham, NC (United States)
- Duke Human Vaccine Inst., Durham, NC (United States); Duke Univ. Schoole of Medicine, Durham, NC (United States)
- National Inst. of Health (NIH), Bethesda, MD (United States)
- National Inst. of Communicable Diseases, Johannesburg (South Africa)
- Univ. of Alabama, Burmingham, AL (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Kamuzu Central Hospital, Lilongwe (Malawi). Univ. of North Carolina Project
- Univ. of North Carolina, Chapel Hill, NC (United States)
- Boston Univ., MA (United States)
A preventive HIV-1 vaccine should induce HIV-1–specific broadly neutralizing antibodies (bnAbs). However, bnAbs generally require high levels of somatic hypermutation (SHM) to acquire breadth, and current vaccine strategies have not been successful in inducing bnAbs. Because bnAbs directed against a glycosylated site adjacent to the third variable loop (V3) of the HIV-1 envelope protein require limited SHM, the V3-glycan epitope is an attractive vaccine target. By studying the cooperation among multiple V3-glycan B cell lineages and their coevolution with autologous virus throughout 5 years of infection, we identify key events in the ontogeny of a V3- glycan bnAb. Two autologous neutralizing antibody lineages selected for virus escape mutations and consequently allowed initiation and affinity maturation of a V3-glycan bnAb lineage. The nucleotide substitution required to initiate the bnAb lineage occurred at a low-probability site for activation-induced cytidine deaminase activity. Cooperation of B cell lineages and an improbable mutation critical for bnAb activity defined the necessary events leading to breadth in this V3- glycan bnAb lineage. These findings may, in part, explain why initiation of V3-glycan bnAbs is rare, and suggest an immunization strategy for inducing similar V3-glycan bnAbs.
- Research Organization:
- Los Alamos National Laboratory (LANL)
- Sponsoring Organization:
- National Institutes of Health; USDOE
- Grant/Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1406204
- Alternate ID(s):
- OSTI ID: 1430303
- Report Number(s):
- LA-UR-16-25421
- Journal Information:
- Science Translational Medicine, Journal Name: Science Translational Medicine Journal Issue: 381 Vol. 9; ISSN 1946-6234
- Publisher:
- AAASCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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