Effect of Ritonavir-Boosted Danoprevir, a Potent Hepatitis C Virus Protease Inhibitor, on QTc Interval in Healthy Subjects: Results from a Thorough QT Study

2013 ◽  
Vol 74 (5) ◽  
pp. 306-315 ◽  
Author(s):  
Peter N. Morcos ◽  
Rohit Kulkarni ◽  
Sally Scoon ◽  
Patrick F. Smith ◽  
Barbara J. Brennan
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Protease Inhibitor ◽  
Healthy Subjects ◽  
Qtc Interval ◽  
Thorough Qt Study

scholarly journals Computer-aided identification of a series of novel ligands showing high potency as hepatitis C virus NS3/4A protease inhibitors

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Stephen Ejeh ◽  
Adamu Uzairu ◽  
Gideon Adamu Shallangwa ◽  
Stephen E. Abechi
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Binding Energy ◽  
Protease Inhibitor ◽  
Protease Inhibitors ◽  
Antiviral Agents ◽  
High Potency ◽  
Direct Acting Antiviral ◽  
Direct Acting ◽  
Direct Acting Antiviral Agents

Abstract Background Hepatitis C virus (HCV) is a global medical condition that causes several life-threatening chronic diseases in the liver. The conventional interferon-free treatment regimens are currently in use by a blend of direct-acting antiviral agents (DAAs) aiming at the viral NS3 protease. However, major concerns may be the issue of DAA-resistant HCV strains and the limited availability to the DAAs due to their high price. Due to this crisis, the developments of a new molecule with high potency as an NS3/4A protease inhibitor of the hepatitis-C virus remain a high priority for medical research. This study aimed to use in-silico methods to identify high potent molecule as an NS3/4A protease inhibitor and investigating the binding energy of the identified molecule in comparison with approved direct-acting antiviral agents (Telaprevir, Simeprevir, and Voxilaprevir) through molecular docking. Results The model obtained by in-silico method have the following statistical records, coefficient of determination (r2) of 0.7704, cross-validation (q2LOO = 0.6914); external test set (r2(pred) = 0.7049) and Y-randomization assessment (cR2p = 0.7025). The results from the model were used to identify 12 new potential human HCV NS3/4A protease inhibitors, and it was observed that the identified molecule is well-fixed when docked with the receptor and was found to have the lowest binding energy of − 10.7, compared to approved direct-acting antiviral agents (Telaprevir, Simeprevir, and Voxilaprevir) with − 9.5, − 10.0, − 10.5 binding energy, respectively. Conclusion The binding affinity (− 10.7) of the newly identified molecule docked with 3D structures of HCV NS3/4a protease/helicase (PDB ID: 4A92) was found to be better than that of Telaprevir, Simeprevir, and Voxilaprevir (approved direct-acting antiviral agents) which are − 9.5, − 10.0, and − 10.5, respectively. Hence, a novel molecule was identified showing high potency as HCV NS3/4a protease inhibitors.

scholarly journals Resistance Analysis of the Hepatitis C Virus NS3 Protease Inhibitor Asunaprevir

2012 ◽  
Vol 56 (7) ◽  
pp. 3670-3681 ◽  
Author(s):  
Fiona McPhee ◽  
Jacques Friborg ◽  
Steven Levine ◽  
Chaoqun Chen ◽  
Paul Falk ◽  
...  
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Protease Inhibitor ◽  
Clinical Studies ◽  
Replication Capacity ◽  
Replication Complex ◽  
Hcv Genotype ◽  
Genotype 1A ◽  
Genotype 1B ◽  
Ns3 Protease

ABSTRACTAsunaprevir (BMS-650032) is a potent hepatitis C virus (HCV) NS3 protease inhibitor demonstrating efficacy in alfa interferon-sparing, direct-acting antiviral dual-combination regimens (together with the NS5A replication complex inhibitor daclatasvir) in patients chronically infected with HCV genotype 1b. Here, we describe a comprehensivein vitrogenotypic and phenotypic analysis of asunaprevir-associated resistance against genotypes 1a and 1b using HCV replicons and patient samples obtained from clinical studies of short-term asunaprevir monotherapy. During genotype 1a resistance selection using HCV replicons, the primary NS3 protease substitutions identified were R155K, D168G, and I170T, which conferred low- to moderate-level asunaprevir resistance (5- to 21-fold) in transient-transfection susceptibility assays. For genotype 1b, a higher level of asunaprevir-associated resistance was observed at the same selection pressures, ranging from 170- to 400-fold relative to the wild-type control. The primary NS3 protease substitutions identified occurred predominantly at amino acid residue D168 (D168A/G/H/V/Y) and were associated with high-level asunaprevir resistance (16- to 280-fold) and impaired replication capacity. In asunaprevir single-ascending-dose and 3-day multiple-ascending-dose studies in HCV genotype 1a- or 1b-infected patients, the predominant pre-existing NS3 baseline polymorphism was NS3-Q80K. This substitution impacted initial virologic response rates in a single-ascending-dose study, but its effects after multiple doses were more ambiguous. Interestingly, for patient NS3 protease sequences containing Q80 and those containing K80, susceptibilities to asunaprevir were comparable when tested in an enzyme assay. No resistance-associated variants emerged in these clinical studies that significantly impacted susceptibility to asunaprevir. Importantly, asunaprevir-resistant replicons remained susceptible to an NS5A replication complex inhibitor, consistent with a role for asunaprevir in combination therapies.

Discovery and structural diversity of the hepatitis C virus NS3/4A serine protease inhibitor series leading to clinical candidate IDX320

2015 ◽  
Vol 25 (22) ◽  
pp. 5427-5436 ◽  
Author(s):  
Christophe C. Parsy ◽  
François-René Alexandre ◽  
Valérie Bidau ◽  
Florence Bonnaterre ◽  
Guillaume Brandt ◽  
...  
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Protease Inhibitor ◽  
Serine Protease ◽  
Structural Diversity ◽  
Serine Protease Inhibitor ◽  
Clinical Candidate

Inhibition and Binding Kinetics of the Hepatitis C Virus NS3 Protease Inhibitor ITMN-191 Reveals Tight Binding and Slow Dissociative Behavior

Biochemistry ◽  
2009 ◽  
Vol 48 (11) ◽  
pp. 2559-2568 ◽  
Author(s):  
Ravi Rajagopalan ◽  
Shawn Misialek ◽  
Sarah K. Stevens ◽  
David G. Myszka ◽  
Barbara J. Brandhuber ◽  
...  
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Protease Inhibitor ◽  
Tight Binding ◽  
Binding Kinetics ◽  
Ns3 Protease ◽  
Kinetics Of

Ultra-Rapid Cardiotoxicity of the Hepatitis C Virus Protease Inhibitor BILN 2061 in the Urokinase-Type Plasminogen Activator Mouse

2007 ◽  
Vol 133 (4) ◽  
pp. 1144-1155 ◽  
Author(s):  
Thomas Vanwolleghem ◽  
Philip Meuleman ◽  
Louis Libbrecht ◽  
Tania Roskams ◽  
Rita De Vos ◽  
...  
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Protease Inhibitor ◽  
Plasminogen Activator ◽  
Type Plasminogen Activator ◽  
Urokinase Type Plasminogen Activator
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