Synthesis and Evaluation of <i>S</i>-Acyl-2-thioethyl Esters of Modified Nucleoside 5‘-Monophosphates as Inhibitors of Hepatitis C Virus RNA Replication
作者:Thazha P. Prakash、Marija Prhavc、Anne B. Eldrup、P. Dan Cook、Steven S. Carroll、David B. Olsen、Mark W. Stahlhut、Joanne E. Tomassini、Malcolm MacCoss、Sheila M. Galloway、Catherine Hilliard、Balkrishen Bhat
DOI:10.1021/jm0495172
日期:2005.2.1
Several triphosphates of modified nucleosides (1-6) were identified as inhibitors (IC(50) = 0.08-3.8 microM) of hepatitis C virus RNA-dependent RNA polymerase (RdRp). Although the initial SAR developed by determining the ability of the triphosphates to inhibit the in vitro activity of the HCV RdRp identified several potent inhibitors, none of the corresponding nucleosides exhibited significant inhibitory
几个三磷酸修饰的核苷 (1-6) 被确定为丙型肝炎病毒 RNA 依赖性 RNA 聚合酶 (RdRp) 的抑制剂 (IC(50) = 0.08-3.8 microM)。尽管通过确定三磷酸盐抑制 HCV RdRp 体外活性的能力而开发的初始 SAR 确定了几种有效的抑制剂,但在基于细胞的复制子测定中,没有一个相应的核苷表现出显着的抑制效力。为了提高活性,合成了双 (tBu-S-acyl-2-thioethyl) 核苷 5'-单磷酸酯 (7-12),与基于细胞的测定中的相应核苷相比,这些衍生物表现出更高的效力。细胞内代谢分析表明 S-acyl-2-thioethyl (SATE) 前药代谢为 5' -三磷酸的效率比相应的核苷高 40 到 155 倍。涉及双 (tBuSATE) 胞苷 5'-单磷酸酯的前药方法显着降低了细胞脱氨酶对胞苷衍生物的脱氨作用。此外,在细胞中用 SAT 前药进行的染色体畸变