Daclatasvir (BMS-790052)S1482

BMS-790052 is one of the most potent inhibitors of HCV replication reported so far. The mean EC50 valuses of BMS-790052 are 50 and 9 pM for HCV genotype 1a and 1b replicons, respectively. BMS-790052 displays a therapeutic index (CC50/EC50) of at least 10⁵ and is inactive towards a panel of 10 RNA and DNA viruses, with EC50 higher than 10 μM. This confirms BMS-790052's specificity for HCV. ^[1] In Huh7 cells harboring the HCV genotype 1b replicons, BMS-790052 blocks both transient and stable HCV genome replication, with EC50 values raging from 1-15 pM. BMS-790052 (100 pM or 1 nM) has been shown to alter the subcellular localization and biochemical fractionation of NS5A. ^[2] BMS-790052 inhibits hybrid replicons containing HCV genotype-4 NS5A genes with EC50 of 7-13 pM. Residue 30 of NS5A is an important site for BMS-790052-mediated resistance in the hybrid replicons. ^[3]