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-Structure paper
Title | Initiation of HIV neutralizing B cell lineages with sequential envelope immunizations. |
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Journal, issue, pages | Nat Commun, Vol. 8, Issue 1, Page 1732, Year 2017 |
Publish date | Nov 23, 2017 |
Authors | Wilton B Williams / Jinsong Zhang / Chuancang Jiang / Nathan I Nicely / Daniela Fera / Kan Luo / M Anthony Moody / Hua-Xin Liao / S Munir Alam / Thomas B Kepler / Akshaya Ramesh / Kevin Wiehe / James A Holland / Todd Bradley / Nathan Vandergrift / Kevin O Saunders / Robert Parks / Andrew Foulger / Shi-Mao Xia / Mattia Bonsignori / David C Montefiori / Mark Louder / Amanda Eaton / Sampa Santra / Richard Scearce / Laura Sutherland / Amanda Newman / Hilary Bouton-Verville / Cindy Bowman / Howard Bomze / Feng Gao / Dawn J Marshall / John F Whitesides / Xiaoyan Nie / Garnett Kelsoe / Steven G Reed / Christopher B Fox / Kim Clary / Marguerite Koutsoukos / David Franco / John R Mascola / Stephen C Harrison / Barton F Haynes / Laurent Verkoczy / |
PubMed Abstract | A strategy for HIV-1 vaccine development is to define envelope (Env) evolution of broadly neutralizing antibodies (bnAbs) in infection and to recreate those events by vaccination. Here, we report ...A strategy for HIV-1 vaccine development is to define envelope (Env) evolution of broadly neutralizing antibodies (bnAbs) in infection and to recreate those events by vaccination. Here, we report host tolerance mechanisms that limit the development of CD4-binding site (CD4bs), HCDR3-binder bnAbs via sequential HIV-1 Env vaccination. Vaccine-induced macaque CD4bs antibodies neutralize 7% of HIV-1 strains, recognize open Env trimers, and accumulate relatively modest somatic mutations. In naive CD4bs, unmutated common ancestor knock-in mice EnvB cell clones develop anergy and partial deletion at the transitional to mature B cell stage, but become Env upon receptor editing. In comparison with repetitive Env immunizations, sequential Env administration rescue anergic Env (non-edited) precursor B cells. Thus, stepwise immunization initiates CD4bs-bnAb responses, but immune tolerance mechanisms restrict their development, suggesting that sequential immunogen-based vaccine regimens will likely need to incorporate strategies to expand bnAb precursor pools. |
External links | Nat Commun / PubMed:29170366 / PubMed Central |
Methods | EM (single particle) / X-ray diffraction |
Resolution | 1.75 - 28.1 Å |
Structure data | EMDB-9401: PDB-5ukn: PDB-5uko: PDB-5ukp: PDB-5ukq: PDB-5ukr: |
Chemicals | ChemComp-CL: ChemComp-HOH: ChemComp-GOL: ChemComp-NAG: |
Source |
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Keywords | IMMUNE SYSTEM / HIV gp120 / HIV gp120 immune system |