Real-time PCR Assay of Individual Human Immunodeficiency Virus Type 1 Variants in Coinfected Human Lymphoid Tissues

Overview

Journal J Clin Microbiol

Specialty Microbiology

Date 2003 May 8

PMID 12734258

Citations 4

Authors

Yoshinori Ito

Jean-Charles Grivel

Leonid Margolis

Affiliations

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Abstract

In the course of infection, human immunodeficiency virus type 1 (HIV-1) mutates, diverging into a "swarm" of viral quasispecies, and the predominance of CCR5- or CXCR4-utilizing quasispecies is strongly associated with the pattern of disease progression. Quantification of CCR5- and CXCR4-utilizing viruses in viral swarms is important in the investigation of the mechanisms of this phenomenon. Here, we report on a new real-time PCR-based methodology for the evaluation of replication of individual CCR5- and CXCR4-utilizing variants. The assay is highly reproducible, with a coefficient of variation of <3%, and it accurately estimates the numbers of virus-specific RNA copies even when their difference in the mixture is 2 orders of magnitude. We demonstrate that replications of CCR5- and CXCR4-utilizing variants can be evaluated and distinguished in experimentally coinfected human lymphoid tissue. The assay we developed may facilitate study of the mechanisms of the R5-to-X4 switch in viral swarms in human tissues infected with HIV-1.

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