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• W2095297111 abstract "ABSTRACT Human immunodeficiency virus type I (HIV-1) reverse transcriptase (RT) resistance mutations reduce the susceptibility of the virus to nucleoside analogues but may also impair viral DNA synthesis. To further characterize the effect of nucleoside analogue resistance mutations on the efficiency and kinetics of HIV-1 DNA synthesis and to evaluate the impact of the depletion of deoxynucleoside triphosphates (dNTP) on this process, DNA synthesis was evaluated by allowing DNA synthesis to proceed with natural HIV-1 templates and primers, either within permeabilized viral particles or in newly infected cells, and quantifying the products by real-time PCR. Three recombinant viruses derived from three pNL4-3 molecular clones expressing mutations associated with resistance to zidovudine: a clone expressing RT mutation M184V, a clone expressing mutations M41L plus T215Y (M41L+T215Y), and clinical isolate BV34 (carrying seven resistance mutations). Following infection of P4 cells, the BV34 mutant, but not viruses expressing the M184V mutation or M41L+T215Y, exhibited a defect in DNA synthesis. Importantly, however, for mutants carrying the M184V mutation or M41L+T215Y mutations, a defect could be detected by using target cells in which dATP pools had been reduced by pretreatment with hydroxyurea. Based on these observations, we developed a recombinant-virus assay to assess the effects of hydroxyurea pretreatment on infectivity of viruses carrying plasma-derived RT sequences from patients with nucleoside resistance. Using this assay, we found that many, but not all, viruses carrying RT resistance mutations display an increased sensitivity to hydroxyurea, suggesting that the impact of RT resistance mutations on viral replication may be more profound in cell populations characterized by smaller dNTP pools." @default.
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• W2095297111 date "2005-01-15" @default.
• W2095297111 modified "2023-09-24" @default.
• W2095297111 title "Quantification of the Effects on Viral DNA Synthesis of Reverse Transcriptase Mutations Conferring Human Immunodeficiency Virus Type 1 Resistance to Nucleoside Analogues" @default.
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• W2095297111 doi "https://doi.org/10.1128/jvi.79.2.812-822.2005" @default.
• W2095297111 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/538537" @default.
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