| Description | Glecaprevir (ABT-493) is an HCV NS3/4A protease inhibitor, (IC50s: 3.5-11.3 nM). |
| In vitro | Glecaprevir (ABT-493) inhibited the enzymatic activity of purified NS3/4A proteases from HCV genotypes 1 to 6 in vitro (IC50: 3.5-11.3 nM) and the replication of stable HCV subgenomic replicons containing proteases from genotypes 1 to 6 (EC50: 0.21-4.6 nM). Glecaprevir had a median EC50 of 0.30 nM (range, 0.05 to 3.8 nM) for HCV replicons containing proteases from 40 samples from patients infected with HCV genotypes 1 to 5 [1]. |
| In vivo | The mean maximal decreases in HCV RNA levels from baseline were approximately 4 log10 IU/ml for all ABT-493 doses ranging from 100 mg to 700 mg and for ABT-530 doses of ≥ 40 mg. There were no meaningful differences in viral load declines for patients with versus without compensated cirrhosis. Twenty-four (50%) of the baseline samples from patients treated with ABT-493 had RAVs to NS3/4A protease inhibitors. Among 40 patients treated with ABT-530, 6 (15%) carried baseline RAVs to NS5A inhibitors [2]. |
| Cell experiments | The activity of glecaprevir, paritaprevir, or grazoprevir against cells of nine cell lines each stably transfected with an HCV subgenomic replicon containing NS3 protease from a different HCV genotype was determined using a luciferase reporter assay as described previously. Five of these nine cell lines have been described previously, including those transfected with genotypes 1a H77, 1b Con1, 3a, 4a, and 6a. The other four cell lines were established by transfecting cells with a nonchimeric genotype 2a JFH-1 replicon, two genotype 2a JFH-1 chimeric replicons containing either a genotype 2b NS3 protease domain (N-terminal 251 amino acids) or a sequence encoding full-length NS3 through the first 39 amino acids of NS5B from genotype 5a (strain SA13), and one chimeric replicon with a genotype 1b Con1 backbone containing full-length NS3 and NS4A sequences from genotype 6e. The genotype 2b and 6e NS3 sequences were each synthetically constructed based on a consensus sequence derived from the alignment of 15 genotype 2b and 4 genotype 6e sequences, respectively. All replicon constructs were bicistronic subgenomic replicons similar to those described by Bartenschlager and coworkers, and the replicon cell lines were generated by introducing these constructs into cells of an Huh-7 human hepatoma-derived cell line. The inhibitory effect of the PIs on HCV replication in replicon cells was determined in Dulbecco's modified Eagle medium containing 5% fetal bovine serum with or without 40% human plasma. The EC50s were determined using nonlinear regression curve fitting as described previously [1]. |
| Target activity | HCV NS3/4A protease:3.5-11.3 nM |
| Synonyms | ABT-493 |
| molecular weight | 838.87 |
| Molecular formula | C38H46F4N6O9S |
| CAS | 1365970-03-1 |
| Storage | Powder: -20°C for 3 years | In solvent: -80°C for 1 year |
| Solubility | DMSO: 55 mg/mL (65.56 mM) |
| References | 1. Ng TI, et al. In Vitro Antiviral Activity and Resistance Profile of the Next-Generation Hepatitis C Virus NS3/4A Protease Inhibitor Glecaprevir. Antimicrob Agents Chemother. 2017 Oct 30. pii: AAC.201620-17. 2. Lawitz EJ, et al. Potent Antiviral Activities of the Direct-Acting Antivirals ABT-493 and ABT-530 with Three-Day Monotherapy for Hepatitis C Virus Genotype 1 Infection. Antimicrob Agents Chemother. 2015 Dec 28;60(3):1546-55. |