期刊
NATURE COMMUNICATIONS
卷 8, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-017-01549-6
关键词
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资金
- National Institute of Allergy and Infectious Diseases [CHAVI-ID 1UM1Al100663, R01 AI113867]
- International AIDS Vaccine Initiative (IAVI)
- United States Agency for International Development
- Ministry of Foreign Affairs of the Netherlands
- Bill AMP
- Melinda Gates Foundation (CAVD award)
Elicitation of broadly neutralizing antibodies (bnAbs) is a primary HIV vaccine goal. Nativelike trimers mimicking virion-associated spikes present nearly all bnAb epitopes and are therefore promising vaccine antigens. However, first generation native-like trimers expose epitopes for non-neutralizing antibodies (non-nAbs), which may hinder bnAb induction. We here employ computational and structure-guided design to develop improved native-like trimers that reduce exposure of non-nAb epitopes in the V3-loop and trimer base, minimize both CD4 reactivity and CD4-induced non-nAb epitope exposure, and increase thermal stability while maintaining bnAb antigenicity. In rabbit immunizations with native-like trimers of the 327c isolate, improved trimers suppress elicitation of V3-directed and tier-1 neutralizing antibodies and induce robust autologous tier-2 neutralization, unlike a firstgeneration trimer. The improved native-like trimers from diverse HIV isolates, and the design methods, have promise to assist in the development of a HIV vaccine.
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