significant cytotoxicity (CC50 = 0.11 μM). Upon derivatization of this trifluoro nucleoside as its prodrug, decreased anti-VZV activity was observed, but with a concomitantly improved selectivity index (SI = 36). When this prodrug was tested against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), its antiviral activity (EC50 = 0.73 μM) was comparable to or slightly lower than its cytotoxic concentration
除了作为化疗药物具有治疗价值外,
吉西他滨还因其广谱抗病毒活性而受到科学界的不断关注。本文描述了4'-甲氧基-和4'-
氟取代的
吉西他滨类似物及其
氨基
磷酸酯前药的合成。在这些衍
生物中,证明4'-
氟吉西他滨对
水痘带状疱疹病毒(VZV,TK +株)有活性,
EC 50为0.042μM,并产生明显的细胞毒性(CC 50)= 0.11μM)。在将该三
氟核苷作为其前药衍生化后,观察到抗VZV活性降低,但选择性指数随之提高(SI = 36)。当对该前药进行针对严重急性呼吸系统综合症冠状病毒2(
SARS-CoV-2)的测试时,其抗病毒活性(
EC 50 = 0.73μM)在细胞生长和细胞形态测量中分别相当于或略低于其细胞毒性浓度。 。