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Title: Maturation Pathway from Germline to Broad HIV-1 Neutralizer of a CD4-Mimic Antibody

Journal Article · · Cell

Here, we report that antibodies with ontogenies from VH1-2 or VH1-46-germline genes dominate the broadly neutralizing response against the CD4-binding site (CD4bs) on HIV-1. We define with longitudinal sampling from time-of-infection the development of a VH1-46-derived antibody lineage that matured to neutralize 90% of HIV-1 isolates. Structures of lineage antibodies CH235 (week 41 from time-of-infection, 18% breadth), CH235.9 (week 152, 77%), and CH235.12 (week 323, 90%) demonstrated the maturing epitope to focus on the conformationally invariant portion of the CD4bs. Similarities between CH235 lineage and five unrelated CD4bs lineages in epitope focusing, length-of-time to develop breadth, and extraordinary level of somatic hypermutation suggested commonalities in maturation among all CD4bs antibodies. Fortunately, the required CH235-lineage hypermutation appeared substantially guided by the intrinsic mutability of the VH1-46 gene, which closely resembled VH1-2. Lastly, we integrated our CH235-lineage findings with a second broadly neutralizing lineage and HIV-1 co-evolution to suggest a vaccination strategy for inducing both lineages.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
W-31-109-Eng-38; AC52-06NA25396; UM1 AI100645; UM1 AI100663; P01-AI104722
OSTI ID:
1350149
Alternate ID(s):
OSTI ID: 1259969; OSTI ID: 1324843
Report Number(s):
LA-UR-15-29619; S0092867416301246; PII: S0092867416301246
Journal Information:
Cell, Journal Name: Cell Vol. 165 Journal Issue: 2; ISSN 0092-8674
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 212 works
Citation information provided by
Web of Science

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