HIV-1 逆转录酶中的 N348I 突变与其他耐药突变联合降低了对替诺福韦和依曲韦林的敏感性。
N348I in HIV-1 reverse transcriptase decreases susceptibility to tenofovir and etravirine in combination with other resistance mutations.
机构信息
University of Pittsburgh School of Medicine, Department of Medicine, Pittsburgh, PA, USA.
出版信息
AIDS. 2010 Jan 16;24(2):317-9. doi: 10.1097/QAD.0b013e3283315697.
Abstract
We previously demonstrated that N348I in HIV-1 reverse transcriptase confers zidovudine and nevirapine resistance. However, both of these inhibitors are currently infrequently used in developed countries, and the impact of N348I on newer reverse transcriptase inhibitors, such as tenofovir and etravirine, is unknown. In this study, we demonstrate that N348I alone confers no resistance to tenofovir and low-level resistance to etravirine. However, N348I significantly decreases tenofovir susceptibility when combined with thymidine analogue mutations and etravirine susceptibility when combined with Y181C.
摘要
我们之前已经证明，HIV-1 逆转录酶中的 N348I 会导致齐多夫定和奈韦拉平耐药。然而，这两种抑制剂目前在发达国家已很少使用，且 N348I 对新型逆转录酶抑制剂（如替诺福韦和依法韦仑）的影响尚不清楚。在本研究中，我们证实，N348I 单独存在时不会赋予替诺福韦耐药性，仅对依法韦仑产生低水平耐药性。然而，当 N348I 与胸苷类似物突变联合时，会显著降低替诺福韦的敏感性，而当与 Y181C 联合时，则会降低依法韦仑的敏感性。
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