HIV type 1 chemokine coreceptor use among antiretroviral-experienced patients screened for a clinical trial of a CCR5 inhibitor: AIDS Clinical Trial Group A5211.
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Wilkin TJ, Su Z, Kuritzkes DR, Hughes M, Flexner C, Gross R, Coakley E, Greaves W, Godfrey C, Skolnik PR, Timpone J, Rodriguez B, Gulick RM
HIV type 1 chemokine coreceptor use among antiretroviral-experienced patients screened for a clinical trial of a CCR5 inhibitor: AIDS Clinical Trial Group A5211.
Clin Infect Dis. 2007 Feb 15;44(4):591-5. Epub 2007 Jan 17.
- PubMed ID
- 17243065 [ View in PubMed]
- Abstract
BACKGROUND: Chemokine coreceptor use impacts both the natural history of human immunodeficiency virus type 1 (HIV-1) disease and the potential use of a new class of antiretroviral agents, the CCR5 inhibitors. METHODS: We analyzed HIV-infected patients who were screened for participation in Acquired Immunodeficiency Syndrome (AIDS) Clinical Trial Group protocol A5211, a phase 2b study of the investigational CCR5 inhibitor vicriviroc involving antiretroviral-experienced subjects. Screening CD4(+) cell count, HIV-1 plasma RNA level, HIV-1 genotype, and chemokine coreceptor use phenotype were determined. The univariate and multivariate association of subject characteristics with coreceptor use was assessed by logistic regression. RESULTS: Coreceptor use was determined for 391 subjects: 197 (50%) had virus that used the CCR5 coreceptor (the R5 group), 178 [corrected] (46%) had dual-tropic or mixed HIV-1 populations that used both CCR5 and CXCR4 coreceptors (the D/M group), and 16 (4%) had virus that used the CXCR4 coreceptor (the X4 group). The D/M group had a significantly lower median CD4(+) cell count than the R5 virus group (103 cells/ micro L vs. 170 cells/ mu L; P<.001). No other characteristics were independently associated. Among 118 subjects who entered A5211 having R5 virus, 12 (10%) had D/M virus according to the results of a second coreceptor test conducted prior to starting treatment with the study drug. CONCLUSIONS: Infection with dual-tropic or mixed HIV-1 populations that use both CCR5 and CXCR4 is common among highly treatment-experienced patients, but infection with virus using CXCR4 alone is uncommon. Subjects in the D/M group had significantly lower CD4(+) cell counts than subjects in the R5 group. Evaluating coreceptor use will be important in the clinical development of CCR5 and CXCR4 inhibitors.
DrugBank Data that Cites this Article
- Drug Targets
Drug Target Kind Organism Pharmacological Action Actions Vicriviroc C-C chemokine receptor type 5 Protein Humans UnknownAntagonistDetails