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Title: Epitope-based vaccine design yields fusion peptide-directed antibodies that neutralize diverse strains of HIV-1

Journal Article · · Nature Medicine
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  1. National Inst. of Health (NIH), Bethesda, MD (United States)
  2. National Inst. of Health (NIH), Bethesda, MD (United States); Simons Electron Microscopy Center, New York, NY (United States)
  3. Simons Electron Microscopy Center, New York, NY (United States)
  4. Vanderbilt Univ., Nashville, TN (United States)
  5. Univ. of California, San Francisco, CA (United States)
  6. Columbia Univ., New York, NY (United States)
  7. Frederick National Lab for Cancer Research, Frederick, MD (United States)
  8. GenScript USA, Piscataway, NJ (United States)
  9. National Inst. of Health (NIH), Bethesda, MD (United States) ; Columbia Univ., New York, NY (United States)
  10. National Inst. of Health (NIH), Bethesda, MD (United States); Columbia Univ., New York, NY (United States)

A central goal of HIV-1 vaccine research is the elicitation of antibodies capable of neutralizing diverse primary isolates of HIV-1. Here we show that focusing the immune response to exposed N-terminal residues of the fusion peptide, a critical component of the viral entry machinery and the epitope of antibodies elicited by HIV-1 infection, through immunization with fusion peptide-coupled carriers and prefusion stabilized envelope trimers, induces cross-clade neutralizing responses. In mice, these immunogens elicited monoclonal antibodies capable of neutralizing up to 31% of a cross-clade panel of 208 HIV-1 strains. Crystal and cryoelectron microscopy structures of these antibodies revealed fusion peptide conformational diversity as a molecular explanation for the cross-clade neutralization. Immunization of guinea pigs and rhesus macaques induced similarly broad fusion peptide-directed neutralizing responses, suggesting translatability. In conclusion, the N terminus of the HIV-1 fusion peptide is thus a promising target of vaccine efforts aimed at eliciting broadly neutralizing antibodies.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Institutes of Health (NIH); Simons Foundation; National Institute of General Medical Sciences; Agouron Institute
Grant/Contract Number:
W-31-109-Eng-38; HHSN261200800001E; R01 AI131722; SF349247; GM103310; F00316; OD019994
OSTI ID:
1467705
Journal Information:
Nature Medicine, Vol. 24, Issue 6; ISSN 1078-8956
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 163 works
Citation information provided by
Web of Science

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Antibody responses to viral infections: a structural perspective across three different enveloped viruses journal March 2019
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Poly- and autoreactivity of HIV-1 bNAbs: implications for vaccine design journal July 2018
Consistent elicitation of cross-clade HIV-neutralizing responses achieved in guinea pigs after fusion peptide priming by repetitive envelope trimer boosting journal April 2019
Quantification of the Resilience and Vulnerability of HIV-1 Native Glycan Shield at Atomistic Detail journal January 2020
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