Abele G, Karlström A, Harmenberg J, Shigeta S, Larsson A, Lindborg B, Wahren B
Antimicrob Agents Chemother. 1987 Jan;31(1):76-80. doi: 10.1128/AAC.31.1.76.
The activity and mode of action of the new nucleoside analog (RS)-9-[4-hydroxy-2-(hydroxymethyl)butyl]guanine (2HM-HBG) against varicella-zoster virus (VZV) were determined. In cell culture, replication of different strains of VZV was inhibited to 50% by 0.4 to 0.7 microM 2HM-HBG, while 685 microM was required to inhibit 50% of the DNA synthesis in uninfected human lung fibroblasts. A thymidine kinase-negative VZV strain was not inhibited by 100 microM 2HM-HBG. Inhibition of VZV replication was not reversible after 7 to 14 days of incubation, depending on the multiplicity of VZV. 2HM-HBG was shown to be selectively phosphorylated by purified VZV thymidine kinase, with an inhibition constant of 32.5 microM. The antiviral activity of 2HM-HBG in cell culture was decreased by the addition of deoxythymidine and deoxycytidine but not by other ribo- or deoxyribonucleosides.
测定了新型核苷类似物(RS)-9-[4-羟基-2-(羟甲基)丁基]鸟嘌呤(2HM-HBG)对水痘带状疱疹病毒(VZV)的活性及作用方式。在细胞培养中,0.4至0.7微摩尔的2HM-HBG可将不同株VZV的复制抑制50%,而抑制未感染人肺成纤维细胞中50%的DNA合成则需要685微摩尔。100微摩尔的2HM-HBG对胸苷激酶阴性的VZV株无抑制作用。根据VZV的感染复数,孵育7至14天后,VZV复制的抑制作用不可逆。纯化的VZV胸苷激酶可使2HM-HBG选择性磷酸化,其抑制常数为32.5微摩尔。添加脱氧胸苷和脱氧胞苷会降低2HM-HBG在细胞培养中的抗病毒活性,但其他核糖核苷或脱氧核糖核苷则不会。