Initiation of HIV neutralizing B cell lineages with sequential envelope immunizations
Journal Article
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· Nature Communications
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- Duke Univ. School of Medicine, Durham, NC (United States)
- Boston Children's Hospital and Harvard Medical School, Boston, MA (United States)
- Jinan Univ., Guangzhou (China); Duke Univ. School of Medicine, Durham, NC (United States)
- Boston Univ. School of Medicine, MA (United States)
- National Inst. of Health (NIH), Bethesda, MD (United States)
- Duke Univ. School of Medicine, Durham, NC (United States); Wake Forest School of Medicine, Winston-Salem, NC (United States)
- Duke Univ., Durham, NC (United States)
- Duke Univ. School of Medicine, Durham, NC (United States); Duke Univ., Durham, NC (United States)
- Infectious Disease Research Inst., Seattle, WA (United States)
- GSK Vaccines, Rixensart (Belgium)
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 Env+B 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.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- NIH; National Inst. of Allergy and Infectious Diseases; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 1462570
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 8; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
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