| Literature DB >> 11861850 |
Christophe Guillon1, Martin Schutten, Patrick H M Boers, Rob A Gruters, Albert D M E Osterhaus.
Abstract
In this study, we characterized the viral determinants of coreceptor usage in relation to susceptibility to antibody-mediated neutralization or enhancement of infectivity by using chimeras of three highly related human immunodeficiency virus type 1 (HIV-1) isolates of different phenotypes. We found that the V3 region was the main determinant of antibody-mediated enhancement and coreceptor specificity but that the overall structure of gp120 was also important for these properties. Constructs susceptible to antibody-mediated enhancement preferentially use CCR5 as a coreceptor, in contrast to constructs that were neutralized or not affected. Using monoclonal antibodies directed against CD4 or CCR5, we were able to show that antibody-mediated enhancement was CD4 dependent. Altogether, our results suggest that the modulation of the interaction of gp120 with CCR5 is the mechanism underlying antibody-mediated enhancement of HIV-1 infectivity.Entities:
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Year: 2002 PMID: 11861850 PMCID: PMC135957 DOI: 10.1128/jvi.76.6.2827-2834.2002
Source DB: PubMed Journal: J Virol ISSN: 0022-538X Impact factor: 5.103