Simultaneously Targeting the NS3 Protease and Helicase Activities for More Effective Hepatitis C Virus Therapy
Authors
Ndjomou, JeanCorby, M Josie.
Sweeney, Noreena L.
Hanson, Alicia M.
Aydin, Cihan
Ali, Akbar
Schiffer, Celia A.
Li, Kelin
Frankowski, Kevin J.
Schoenen, Frank J.
Frick, David N.
UMass Chan Affiliations
Department of Biochemistry and Molecular PharmacologyDocument Type
Journal ArticlePublication Date
2015-08-21Keywords
BiochemistryMedicinal Chemistry and Pharmaceutics
Medicinal-Pharmaceutical Chemistry
Molecular Biology
Structural Biology
Virology
Metadata
Show full item recordAbstract
This study examines the specificity and mechanism of action of a recently reported hepatitis C virus (HCV) nonstructural protein 3 (NS3) helicase-protease inhibitor (HPI), and the interaction of HPI with the NS3 protease inhibitors telaprevir, boceprevir, danoprevir, and grazoprevir. HPI most effectively reduced cellular levels of subgenomic genotype 4a replicons, followed by genotypes 3a and 1b replicons. HPI had no effect on HCV genotype 2a or dengue virus replicon levels. Resistance evolved more slowly to HPI than telaprevir, and HPI inhibited telaprevir-resistant replicons. Molecular modeling and analysis of the ability of HPI to inhibit peptide hydrolysis catalyzed by a variety of wildtype and mutant NS3 proteins suggested that HPI forms a bridge between the NS3 RNA-binding cleft and an allosteric site previously shown to bind other protease inhibitors. In most combinations, the antiviral effect of HPI was additive with telaprevir and boceprevir, minor synergy was observed with danoprevir, and modest synergy was observed with grazoprevir.Source
ACS Chem Biol. 2015 Aug 21;10(8):1887-96. doi: 10.1021/acschembio.5b00101. Epub 2015 May 22. Link to article on publisher's siteDOI
10.1021/acschembio.5b00101Permanent Link to this Item
http://hdl.handle.net/20.500.14038/48902PubMed ID
25961497Related Resources
Link to Article in PubMedae974a485f413a2113503eed53cd6c53
10.1021/acschembio.5b00101