The effects of RNase H inhibitors and nevirapine on the susceptibility of HIV-1 to AZT and 3TC.
The effects of RNase H inhibitors and nevirapine on the susceptibility of HIV-1 to AZT and 3TC.
复制标题
RNase H 抑制剂和奈韦拉平对 HIV-1 对 AZT 和 3TC 敏感性的影响。
DOI:
10.1016/j.virol.2011.08.010
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Hughes,StephenH
中科院分区:
文献类型:
--
作者:
Davis,CarolineA;Parniak,MichaelA;Hughes,StephenH
It was recently proposed that HIV RT mutations that decrease RNase H activity increase zidovudine (AZT) resistance by delaying the degradation of the RNA template, allowing more time for AZTMP excision from the 3′ end of the viral DNA. This predicts that suboptimal concentrations of an RNase H Inhibitor (RNHI), which would decrease RNaseH activity, would decrease AZT susceptibility. Conversely, a suboptimal concentration of a nonnucleoside RT inhibitor (NNRTI) would decrease polymerase activity and increase AZT susceptibility. We determined the effect of several RNHIs and an NNRTI (nevirapine) on AZT and lamivudine (3TC) susceptibility with vectors that replicate using WT or AZT resistant RTs. Susceptibility to 3TC, which is not readily excised, did not change significantly. Nevirapine, and most RNHIs tested, had only small effects on the susceptibility of either HIV vector to AZT and 3TC. One RNHI, F0444-0019, increased the IC50for AZT for either vector by ~5-fold, which may be a concern.
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