Hertogs K, de Béthune M P, Miller V, Ivens T, Schel P, Van Cauwenberge A, Van Den Eynde C, Van Gerwen V, Azijn H, Van Houtte M, Peeters F, Staszewski S, Conant M, Bloor S, Kemp S, Larder B, Pauwels R
VIRCO, Central Virological Laboratory, Edegem, Belgium.
Antimicrob Agents Chemother. 1998 Feb;42(2):269-76. doi: 10.1128/AAC.42.2.269.
Combination therapy with protease (PR) and reverse transcriptase (RT) inhibitors can efficiently suppress human immunodeficiency virus (HIV) replication, but the emergence of drug-resistant variants correlates strongly with therapeutic failure. Here we describe a new method for high-throughput analysis of clinical samples that permits the simultaneous detection of HIV type 1 (HIV-1) phenotypic resistance to both RT and PR inhibitors by means of recombinant virus assay technology. HIV-1 RNA is extracted from plasma samples, and a 2.2-kb fragment containing the entire HIV-1 PR- and RT-coding sequence is amplified by nested reverse transcription-PCR. The pool of PR-RT-coding sequences is then cotransfected into CD4+ T lymphocytes (MT4) with the pGEMT3deltaPRT plasmid from which most of the PR (codons 10 to 99) and RT (codons 1 to 482) sequences are deleted. Homologous recombination leads to the generation of chimeric viruses containing PR- and RT-coding sequences derived from HIV-1 RNA in plasma. The susceptibilities of the chimeric viruses to all currently available RT and/or PR inhibitors is determined by an MT4 cell-3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide-based cell viability assay in an automated system that allows high sample throughput. The profile of resistance to all RT and PR inhibitors is displayed graphically in a single PR-RT-Antivirogram. This assay system facilitates the rapid large-scale phenotypic resistance determinations for all RT and PR inhibitors in one standardized assay.
蛋白酶(PR)抑制剂与逆转录酶(RT)抑制剂联合治疗可有效抑制人类免疫缺陷病毒(HIV)复制,但耐药变异株的出现与治疗失败密切相关。本文描述了一种用于临床样本高通量分析的新方法,该方法可通过重组病毒分析技术同时检测1型HIV(HIV-1)对RT和PR抑制剂的表型耐药性。从血浆样本中提取HIV-1 RNA,通过巢式逆转录PCR扩增包含整个HIV-1 PR和RT编码序列的2.2 kb片段。然后将PR-RT编码序列库与pGEMT3deltaPRT质粒共转染到CD4+ T淋巴细胞(MT4)中,该质粒中大部分PR(第10至99密码子)和RT(第1至482密码子)序列已被删除。同源重组导致产生嵌合病毒,其包含源自血浆中HIV-1 RNA的PR和RT编码序列。嵌合病毒对所有现有RT和/或PR抑制剂的敏感性通过基于MT4细胞的3-(4,5-二甲基噻唑-2-基)-2,5-二苯基四氮唑溴盐的细胞活力测定法在允许高通量样本的自动化系统中进行测定。对所有RT和PR抑制剂的耐药性图谱以单一的PR-RT-抗病毒图形式以图形方式显示。该检测系统有助于在一项标准化检测中快速大规模地测定所有RT和PR抑制剂的表型耐药性。