Srinivas R V, Fridland A
Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, USA.
Antimicrob Agents Chemother. 1998 Jun;42(6):1484-7. doi: 10.1128/AAC.42.6.1484.
9-R-2-Phosphonomethoxypropyl adenine (PMPA) is an acyclic nucleoside phosphonate analog that has demonstrated efficacy against human immunodeficiency virus (HIV). We recently described the synthesis, metabolism, and biological activities of bis(isopropyloxymethylcarbonyl)PMPA [bis(poc)PMPA] as an orally bioavailable prodrug for PMPA. Among a large panel of drug-resistant HIV type 1 variants, only the K65R virus was resistant to PMPA. K65R virus also showed reduced susceptibility to bis(poc)PMPA, although the prodrug could still inhibit these viruses at submicromolar, nontoxic concentrations. Among a panel of seven primary clinical isolates from patients with diverse treatment histories, only one isolate showed reduced susceptibility to PMPA and was found to carry three mutations (M41L, T69N, R73K) in its reverse transcriptase catalytic domain.
9 - R - 2 - 膦酰甲氧基丙基腺嘌呤(PMPA)是一种无环核苷膦酸类似物,已证明对人类免疫缺陷病毒(HIV)有效。我们最近描述了双(异丙氧基甲基羰基)PMPA [双(poc)PMPA]作为PMPA的口服生物利用前药的合成、代谢和生物活性。在一大组耐药的1型HIV变体中,只有K65R病毒对PMPA耐药。K65R病毒对双(poc)PMPA的敏感性也降低,尽管该前药仍能在亚微摩尔无毒浓度下抑制这些病毒。在一组来自具有不同治疗史患者的7株原发性临床分离株中,只有1株对PMPA的敏感性降低,并且在其逆转录酶催化结构域中发现携带三个突变(M41L、T69N、R73K)。