Wu L, Yang ZY, Xu L, Welcher B, Winfrey S, Shao Y, Mascola JR, Nabel GJ. Cross-clade recognition and neutralization by the V3 region from clade C human immunodeficiency virus-1 envelope.
Vaccine 2006;
24:4995-5002. [PMID:
16690178 DOI:
10.1016/j.vaccine.2006.03.083]
[Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2005] [Revised: 03/04/2006] [Accepted: 03/16/2006] [Indexed: 11/26/2022]
Abstract
To understand the cross-reactivity of antibodies directed against variable regions of human immunodeficiency virus-1 (HIV-1) envelope (Env), chimeric immunogens were prepared from different clades with modifications in variable regions, and the resulting neutralizing antibody response was evaluated. The V3-specific neutralization activity induced by a clade B immunogen was limited to clade B viruses and was blocked by a clade B V3 peptide, but not by analogous clade A or C V3 peptides. In contrast, the V3 response elicited by a clade C immunogen cross-reacted with sensitive clade B viruses. The V3 region from a clade C virus, when introduced into a clade B sequence, elicited cross-clade activity, which could be reversed by V3 peptides derived from clades A and C. Thus, the anti-V3 antibody response elicited by a clade C immunogen could cross-react with heterologous clade viruses. Additionally, we describe a V1-specific immune response that mediated neutralization limited to the homologous HIV IIIB isolate and may be partially responsible for the commonly observed strain-specific neutralization responses elicited by vaccine immunogens.
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