R-1479 (4'-Azidocytidine) is an RdRp inhibitor with an IC50 value of 1.28 μM for HCV RNA replication in the HCV subgenomic replicon system.

HCV replication:1.28 μM

R-1479通过剂量依赖的方式抑制HCV RNA复制，并减少增殖的复制子细胞内Renillaluciferase活性[1]。此外，R-1479抑制由NS5B介导的RNA合成，其IC50值为320 nM，同时也针对HCV编码的RNA聚合酶[2]。

The membrane-associated, native HCV replicase complex is isolated from 2209-23 HCV replicon cells and a derived cell line carrying HCV replicon RNA with an S282T mutation in the NS5B coding sequence. The in vitro replicase assay contain 10 μL of cytoplasmic membrane fraction, 50 mM HEPES (pH 7.5), 10 mM KCl, 10 mM dithiothreitol, 5 mM MgCl2, 20 μg/mL actinomycin D, 1 mM ATP, 1 mM GTP, 1 mM UTP, 30 μCi of [α-33P]CTP (3000 Ci/mmol, 10 mCi/mL), 1 unit/μL SUPERase•In, 10 mM creatine phosphate, and 200 μg/mL creatine phosphokinase in a final volume of 25 μL [1].