Baseline HIV type 1 coreceptor tropism predicts disease progression.
Clin Infect Dis 2007;
45:643-9. [PMID:
17683002 DOI:
10.1086/520650]
[Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2007] [Accepted: 05/02/2007] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND
Human immunodeficiency virus type 1 (HIV-1) coreceptor tropism, the ability of the virus to enter cells via CCR5 or CXCR4, is a viral characteristic mediated by the envelope gene. The impact of coreceptor tropism on the natural history of HIV-1 infection has not been fully explored.
METHODS
Coreceptor tropism was measured using a recombinant virus single-cycle assay on plasma specimens obtained at baseline from 126 children and adolescents in the Hemophilia Growth and Development Study cohort who were enrolled from 1989 through 1990 and underwent follow-up through 1997.
RESULTS
Detectable CXCR4-using virus at baseline was associated with a lower baseline CD4(+) T cell count and a higher plasma HIV-1 RNA level. In addition, it independently predicted a greater decrease in CD4(+) T cell count over time (P<.001) and was associated with a 3.8-fold increased risk of progression to clinical AIDS.
CONCLUSIONS
This study demonstrates that coreceptor tropism, as assessed by this single-cycle assay, independently influences the natural history of HIV-1 disease.
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