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Title: HIV-1 vaccine design through minimizing envelope metastability

Journal Article · · Science Advances
ORCiD logo [1];  [1]; ORCiD logo [2];  [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [1]; ORCiD logo [1]
  1. The Scripps Research Inst., La Jolla, CA (United States)
  2. Univ. of Southampton (United Kingdom)
  3. The Scripps Research Inst., La Jolla, CA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Massachusetts General Hospital, Ragon Inst.

Overcoming envelope metastability is crucial to trimer-based HIV-1 vaccine design. Here, we present a coherent vaccine strategy by minimizing metastability. For 10 strains across five clades, we demonstrate that the gp41 ectodomain (gp41ECTO) is the main source of envelope metastability by replacing wild-type gp41ECTO with BG505 gp41ECTO of the uncleaved prefusion-optimized (UFO) design. These gp41ECTO-swapped trimers can be produced in CHO cells with high yield and high purity. The crystal structure of a gp41ECTO-swapped trimer elucidates how a neutralization-resistant tier 3 virus evades antibody recognition of the V2 apex. UFO trimers of transmitted/founder viruses and UFO trimers containing a consensus-based ancestral gp41ECTO suggest an evolutionary root of metastability. The gp41ECTO-stabilized trimers can be readily displayed on 24- and 60-meric nanoparticles, with incorporation of additional T cell help illustrated for a hyperstable 60-mer, I3-01. In mice and rabbits, these gp140 nanoparticles induced tier 2 neutralizing antibody responses more effectively than soluble trimers.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
National Cancer Institute (NCI); National Institute of General Medical Sciences (NIGMS); USDOE Office of Science (SC); International AIDS Vaccine Initiative Neutralizing Antibody Center; Bill & Melinda Gates Foundation; Collaboration for AIDS Vaccine Discovery; Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery
Grant/Contract Number:
AC02-06CH11357; OPP1084519; OPP1115782; CHAVI-ID UM1 AI100663; AI084817; AI129698; AI125078-01A1
OSTI ID:
1499778
Journal Information:
Science Advances, Vol. 4, Issue 11; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 45 works
Citation information provided by
Web of Science

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