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Journal of Clinical Microbiology, November 2005, p. 5696-5704, Vol. 43, No. 11
0095-1137/05/$08.00+0 doi:10.1128/JCM.43.11.5696-5704.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.
Basic Research Program, SAIC-Frederick, Inc., NCI Frederick, Frederick, Maryland,1 Division of Infectious Diseases, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania,2 Gene Regulation and Chromosome Biology Laboratory, NCI Frederick, Frederick, Maryland3
Received 4 November 2004/ Returned for modification 2 May 2005/ Accepted 4 August 2005
Detection of drug-resistant variants is important for the clinical management of human immunodeficiency virus type 1 (HIV-1) infection and for studies on the evolution of drug resistance. Here we show that hybrid elements composed of the Saccharomyces cerevisiae retrotransposon Ty1 and the reverse transcriptase (RT) of HIV-1 are useful tools for detecting, monitoring, and isolating drug-resistant reverse transcriptases. This sensitive phenotypic assay is able to detect nonnucleoside reverse transcriptase inhibitor-resistant RT domains derived from mixtures of infectious molecular clones of HIV-1 in plasma and from clinical samples when the variants comprise as little as 0.3 to 1% of the virus population. Our assay can characterize the activities and drug susceptibilities of both known and novel reverse transcriptase variants and should prove useful in studies of the evolution and clinical significance of minor drug-resistant viral variants.
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