Lawrence P, Berlier W, Delezay O, Palle S, Olivier T, Saoudin H, Mottin S, Lucht F, Pozzetto B, Bourlet T. Construction and tropism characterisation of recombinant viruses exhibiting HIV-1 env gene from seminal strains.
Virology 2009;
386:373-9. [PMID:
19232661 DOI:
10.1016/j.virol.2009.01.028]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2008] [Revised: 12/06/2008] [Accepted: 01/21/2009] [Indexed: 11/27/2022]
Abstract
Genetic differences between blood and mucosal-derived HIV-1 strains have been widely reported. As amplification of HIV-1 strains from mucosal samples including semen or saliva by co-culture has low sensitivity, we developed the construction of chimeric viruses expressing wild-type seminal HIV-1 envelope protein. Chimeric viruses were produced by co-transfection of a V1-V3 deleted pNL 43 vector and PCR fragments spanning the deleted region, amplified from HIV-1 RNA positive seminal plasma samples. After an initial testing of co-receptor usage by a tropism recombinant test, replication capacity and amplification of these recombinant viruses were assessed using PBMC. Four chimeric replicative strains, all using CXCR4 as coreceptor, were produced. The interaction between cell-free viral particles and reporter cell lines was assessed by confocal microscopy. These replicative chimeras exhibiting HIV-1 env from seminal strains represent useful tools for the in vitro study of the heterosexual transmission of HIV-1 and testing of microbicide activity.
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