Furman P A, de Miranda P, St Clair M H, Elion G B
Antimicrob Agents Chemother. 1981 Oct;20(4):518-24. doi: 10.1128/AAC.20.4.518.
The metabolism of acyclovir to its mono-, di-, and triphosphate derivatives was examined in uninfected and virus-infected cells. The level of phosphorylation of acyclovir was dependent upon virus type, cell line, exogenous drug concentration, and exposure time. Acyclovir phosphorylation was inhibited by exogenously added nucleosides. The order of inhibition was deoxythymidine greater than deoxycytidine greater than guanosine greater than or equal to deoxyguanosine. Acyclovir triphosphate persisted in infected cells after removal of the drug from the medium. The initial half-life of the triphosphate was 1.2 h in the absence of the drug in the medium, but triphosphate levels reached a plateau after 6 h. The presence of low concentrations of the drug in the medium resulted in a longer persistence of the intracellular triphosphate and a higher plateau level.
在未感染和病毒感染的细胞中研究了阿昔洛韦向其一磷酸、二磷酸和三磷酸衍生物的代谢情况。阿昔洛韦的磷酸化水平取决于病毒类型、细胞系、外源药物浓度和暴露时间。外源性添加核苷可抑制阿昔洛韦的磷酸化。抑制顺序为脱氧胸苷>脱氧胞苷>鸟苷≥脱氧鸟苷。从培养基中去除药物后,阿昔洛韦三磷酸在感染细胞中持续存在。在培养基中不存在药物的情况下,三磷酸的初始半衰期为1.2小时,但三磷酸水平在6小时后达到平台期。培养基中低浓度药物的存在导致细胞内三磷酸的持续时间更长且平台期水平更高。