1
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Martino SD, Petri GL, De Rosa M. Hepatitis C: The Story of a Long Journey through First, Second, and Third Generation NS3/4A Peptidomimetic Inhibitors. What Did We Learn? J Med Chem 2024; 67:885-921. [PMID: 38179950 DOI: 10.1021/acs.jmedchem.3c01971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
Hepatitis C viral (HCV) infection is the leading cause of liver failure and still represents a global health burden. Over the past decade, great advancements made HCV curable, and sustained viral remission significantly improved to more than 98%. Historical treatment with pegylated interferon alpha and ribavirin has been displaced by combinations of direct-acting antivirals. These regimens include drugs targeting different stages of the HCV life cycle. However, the emergence of viral resistance remains a big concern. The design of peptidomimetic inhibitors (PIs) able to fit and fill the conserved substrate envelope region within the active site helped avoid contact with the vulnerable sites of the most common resistance-associated substitutions Arg155, Ala156, and Asp168. Herein, we give an overview of HCV NS3 PIs discovered during the past decade, and we deeply discuss the rationale behind the structural optimization efforts essential to achieve pangenotypic activity.
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Affiliation(s)
- Simona Di Martino
- Drug Discovery Unit, Medicinal Chemistry Group, Ri.MED Foundation, Palermo 90133, Italy
| | - Giovanna Li Petri
- Drug Discovery Unit, Medicinal Chemistry Group, Ri.MED Foundation, Palermo 90133, Italy
| | - Maria De Rosa
- Drug Discovery Unit, Medicinal Chemistry Group, Ri.MED Foundation, Palermo 90133, Italy
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2
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Belfrage AK, Abdurakhmanov E, Kerblom E, Brandt P, Oshalim A, Gising J, Skogh A, Neyts J, Danielson UH, Sandström A. Discovery of pyrazinone based compounds that potently inhibit the drug-resistant enzyme variant R155K of the hepatitis C virus NS3 protease. Bioorg Med Chem 2016; 24:2603-20. [PMID: 27160057 DOI: 10.1016/j.bmc.2016.03.066] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 03/17/2016] [Accepted: 03/21/2016] [Indexed: 01/15/2023]
Abstract
Herein, we present the design and synthesis of 2(1H)-pyrazinone based HCV NS3 protease inhibitors with variations in the C-terminus. Biochemical evaluation was performed using genotype 1a, both the wild-type and the drug resistant enzyme variant, R155K. Surprisingly, compounds without an acidic sulfonamide retained good inhibition, challenging our previous molecular docking model. Moreover, selected compounds in this series showed nanomolar potency against R155K NS3 protease; which generally confer resistance to all HCV NS3 protease inhibitors approved or in clinical trials. These results further strengthen the potential of this novel substance class, being very different to the approved drugs and clinical candidates, in the development of inhibitors less sensitive to drug resistance.
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Affiliation(s)
- Anna Karin Belfrage
- Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry, Uppsala University, Box 574, SE-75123 Uppsala, Sweden
| | - Eldar Abdurakhmanov
- Department of Chemistry-BMC, Uppsala University, Box 576, SE-75123 Uppsala, Sweden
| | - Eva Kerblom
- Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry, Uppsala University, Box 574, SE-75123 Uppsala, Sweden
| | - Peter Brandt
- Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry, Uppsala University, Box 574, SE-75123 Uppsala, Sweden
| | - Anna Oshalim
- Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry, Uppsala University, Box 574, SE-75123 Uppsala, Sweden
| | - Johan Gising
- Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry, Uppsala University, Box 574, SE-75123 Uppsala, Sweden
| | - Anna Skogh
- Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry, Uppsala University, Box 574, SE-75123 Uppsala, Sweden
| | - Johan Neyts
- Rega Institute, Department of Microbiology and Immunology, University of Leuven, B-3000 Leuven, Belgium
| | - U Helena Danielson
- Department of Chemistry-BMC, Uppsala University, Box 576, SE-75123 Uppsala, Sweden
| | - Anja Sandström
- Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry, Uppsala University, Box 574, SE-75123 Uppsala, Sweden.
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3
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Unzippers, resolvers and sensors: a structural and functional biochemistry tale of RNA helicases. Int J Mol Sci 2015; 16:2269-93. [PMID: 25622248 PMCID: PMC4346836 DOI: 10.3390/ijms16022269] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 01/09/2015] [Accepted: 01/12/2015] [Indexed: 12/28/2022] Open
Abstract
The centrality of RNA within the biological world is an irrefutable fact that currently attracts increasing attention from the scientific community. The panoply of functional RNAs requires the existence of specific biological caretakers, RNA helicases, devoted to maintain the proper folding of those molecules, resolving unstable structures. However, evolution has taken advantage of the specific position and characteristics of RNA helicases to develop new functions for these proteins, which are at the interface of the basic processes for transference of information from DNA to proteins. RNA helicases are involved in many biologically relevant processes, not only as RNA chaperones, but also as signal transducers, scaffolds of molecular complexes, and regulatory elements. Structural biology studies during the last decade, founded in X-ray crystallography, have characterized in detail several RNA-helicases. This comprehensive review summarizes the structural knowledge accumulated in the last two decades within this family of proteins, with special emphasis on the structure-function relationships of the most widely-studied families of RNA helicases: the DEAD-box, RIG-I-like and viral NS3 classes.
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4
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Lampa A, Alogheli H, Ehrenberg AE, Åkerblom E, Svensson R, Artursson P, Danielson UH, Karlén A, Sandström A. Vinylated linear P2 pyrimidinyloxyphenylglycine based inhibitors of the HCV NS3/4A protease and corresponding macrocycles. Bioorg Med Chem 2014; 22:6595-6615. [PMID: 25456385 DOI: 10.1016/j.bmc.2014.10.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 10/04/2014] [Accepted: 10/09/2014] [Indexed: 10/24/2022]
Abstract
With three recent market approvals and several inhibitors in advanced stages of development, the hepatitis C virus (HCV) NS3/4A protease represents a successful target for antiviral therapy against hepatitis C. As a consequence of dealing with viral diseases in general, there are concerns related to the emergence of drug resistant strains which calls for development of inhibitors with an alternative binding-mode than the existing highly optimized ones. We have previously reported on the use of phenylglycine as an alternative P2 residue in HCV NS3/4A protease inhibitors. Herein, we present the synthesis, structure-activity relationships and in vitro pharmacokinetic characterization of a diverse series of linear and macrocyclic P2 pyrimidinyloxyphenylglycine based inhibitors. With access to vinyl substituents in P3, P2 and P1' positions an initial probing of macrocyclization between different positions, using ring-closing metathesis (RCM) could be performed, after addressing some synthetic challenges. Biochemical results from the wild type enzyme and drug resistant variants (e.g., R155 K) indicate that P3-P1' macrocyclization, leaving the P2 substituent in a flexible mode, is a promising approach. Additionally, the study demonstrates that phenylglycine based inhibitors benefit from p-phenylpyrimidinyloxy and m-vinyl groups as well as from the combination with an aromatic P1 motif with alkenylic P1' elongations. In fact, linear P2-P1' spanning intermediate compounds based on these fragments were found to display promising inhibitory potencies and drug like properties.
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Affiliation(s)
- Anna Lampa
- Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry, Uppsala University, BMC, Box 574, SE-751 23 Uppsala, Sweden
| | - Hiba Alogheli
- Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry, Uppsala University, BMC, Box 574, SE-751 23 Uppsala, Sweden
| | - Angelica E Ehrenberg
- Department of Chemistry-BMC, Uppsala University, BMC, Box 576, SE-751 23 Uppsala, Sweden
| | - Eva Åkerblom
- Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry, Uppsala University, BMC, Box 574, SE-751 23 Uppsala, Sweden
| | - Richard Svensson
- Department of Pharmacy, Uppsala University, Box 580, SE-751 23 Uppsala, Sweden; The Uppsala University Drug Optimization and Pharmaceutical Profiling Platform, Uppsala University, A Node of the Chemical Biology Consortium Sweden (CBCS), Box 580, SE-751 23 Uppsala, Sweden
| | - Per Artursson
- Department of Pharmacy, Uppsala University, Box 580, SE-751 23 Uppsala, Sweden; The Uppsala University Drug Optimization and Pharmaceutical Profiling Platform, Uppsala University, A Node of the Chemical Biology Consortium Sweden (CBCS), Box 580, SE-751 23 Uppsala, Sweden
| | - U Helena Danielson
- Department of Chemistry-BMC, Uppsala University, BMC, Box 576, SE-751 23 Uppsala, Sweden
| | - Anders Karlén
- Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry, Uppsala University, BMC, Box 574, SE-751 23 Uppsala, Sweden
| | - Anja Sandström
- Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry, Uppsala University, BMC, Box 574, SE-751 23 Uppsala, Sweden.
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5
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Fu J, Wei J. Molecular dynamics study on drug resistance mechanism of HCV NS3/4A protease inhibitor: BI201335. MOLECULAR SIMULATION 2014. [DOI: 10.1080/08927022.2014.917298] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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6
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Lampa AK, Bergman SM, Gustafsson SS, Alogheli H, Åkerblom EB, Lindeberg GG, Svensson RM, Artursson P, Danielson UH, Karlén A, Sandström A. Novel Peptidomimetic Hepatitis C Virus NS3/4A Protease Inhibitors Spanning the P2-P1' Region. ACS Med Chem Lett 2014; 5:249-54. [PMID: 24900813 DOI: 10.1021/ml400217r] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Accepted: 08/02/2013] [Indexed: 02/06/2023] Open
Abstract
Herein, novel hepatitis C virus NS3/4A protease inhibitors based on a P2 pyrimidinyloxyphenylglycine in combination with various regioisomers of an aryl acyl sulfonamide functionality in P1 are presented. The P1' 4-(trifluoromethyl)phenyl side chain was shown to be particularly beneficial in terms of inhibitory potency. Several inhibitors with K i-values in the nanomolar range were developed and included identification of promising P3-truncated inhibitors spanning from P2-P1'. Of several different P2 capping groups that were evaluated, a preference for the sterically congested Boc group was revealed. The inhibitors were found to retain inhibitory potencies for A156T, D168V, and R155K variants of the protease. Furthermore, in vitro pharmacokinetic profiling showed several beneficial effects on metabolic stability as well as on apparent intestinal permeability from both P3 truncation and the use of the P1' 4-(trifluoromethyl)phenyl side chain.
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Affiliation(s)
- Anna K. Lampa
- Department of Medicinal Chemistry,
Organic Pharmaceutical Chemistry, Uppsala University, BMC, Box 574, SE-751 23 Uppsala, Sweden
| | - Sara M. Bergman
- Department of Medicinal Chemistry,
Organic Pharmaceutical Chemistry, Uppsala University, BMC, Box 574, SE-751 23 Uppsala, Sweden
| | - Sofia S. Gustafsson
- Department of Chemistry−BMC, Uppsala University, BMC, Box 576, SE-751 23 Uppsala,
Sweden
| | - Hiba Alogheli
- Department of Medicinal Chemistry,
Organic Pharmaceutical Chemistry, Uppsala University, BMC, Box 574, SE-751 23 Uppsala, Sweden
| | - Eva B. Åkerblom
- Department of Medicinal Chemistry,
Organic Pharmaceutical Chemistry, Uppsala University, BMC, Box 574, SE-751 23 Uppsala, Sweden
| | - Gunnar G. Lindeberg
- Department of Medicinal Chemistry,
Organic Pharmaceutical Chemistry, Uppsala University, BMC, Box 574, SE-751 23 Uppsala, Sweden
| | - Richard M. Svensson
- Department of Pharmacy, Uppsala University, Box 580, SE-751 23 Uppsala, Sweden
- The Uppsala University Drug
Optimization and Pharmaceutical Profiling Platform, Uppsala University, a Node of the Chemical Biology Consortium
Sweden (CBCS), Box 580, SE-751 23 Uppsala, Sweden
| | - Per Artursson
- Department of Pharmacy, Uppsala University, Box 580, SE-751 23 Uppsala, Sweden
- The Uppsala University Drug
Optimization and Pharmaceutical Profiling Platform, Uppsala University, a Node of the Chemical Biology Consortium
Sweden (CBCS), Box 580, SE-751 23 Uppsala, Sweden
| | - U. Helena Danielson
- Department of Chemistry−BMC, Uppsala University, BMC, Box 576, SE-751 23 Uppsala,
Sweden
| | - Anders Karlén
- Department of Medicinal Chemistry,
Organic Pharmaceutical Chemistry, Uppsala University, BMC, Box 574, SE-751 23 Uppsala, Sweden
| | - Anja Sandström
- Department of Medicinal Chemistry,
Organic Pharmaceutical Chemistry, Uppsala University, BMC, Box 574, SE-751 23 Uppsala, Sweden
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7
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Scola PM, Sun LQ, Wang AX, Chen J, Sin N, Venables BL, Sit SY, Chen Y, Cocuzza A, Bilder DM, D'Andrea SV, Zheng B, Hewawasam P, Tu Y, Friborg J, Falk P, Hernandez D, Levine S, Chen C, Yu F, Sheaffer AK, Zhai G, Barry D, Knipe JO, Han YH, Schartman R, Donoso M, Mosure K, Sinz MW, Zvyaga T, Good AC, Rajamani R, Kish K, Tredup J, Klei HE, Gao Q, Mueller L, Colonno RJ, Grasela DM, Adams SP, Loy J, Levesque PC, Sun H, Shi H, Sun L, Warner W, Li D, Zhu J, Meanwell NA, McPhee F. The discovery of asunaprevir (BMS-650032), an orally efficacious NS3 protease inhibitor for the treatment of hepatitis C virus infection. J Med Chem 2014; 57:1730-52. [PMID: 24564672 DOI: 10.1021/jm500297k] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The discovery of asunaprevir (BMS-650032, 24) is described. This tripeptidic acylsulfonamide inhibitor of the NS3/4A enzyme is currently in phase III clinical trials for the treatment of hepatitis C virus infection. The discovery of 24 was enabled by employing an isolated rabbit heart model to screen for the cardiovascular (CV) liabilities (changes to HR and SNRT) that were responsible for the discontinuation of an earlier lead from this chemical series, BMS-605339 (1), from clinical trials. The structure-activity relationships (SARs) developed with respect to CV effects established that small structural changes to the P2* subsite of the molecule had a significant impact on the CV profile of a given compound. The antiviral activity, preclincial PK profile, and toxicology studies in rat and dog supported clinical development of BMS-650032 (24).
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Affiliation(s)
- Paul M Scola
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development , 5 Research Parkway, Wallingford, Connecticut, 06492, United States
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8
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Scola PM, Wang AX, Good AC, Sun LQ, Combrink KD, Campbell JA, Chen J, Tu Y, Sin N, Venables BL, Sit SY, Chen Y, Cocuzza A, Bilder DM, D’Andrea S, Zheng B, Hewawasam P, Ding M, Thuring J, Li J, Hernandez D, Yu F, Falk P, Zhai G, Sheaffer AK, Chen C, Lee MS, Barry D, Knipe JO, Li W, Han YH, Jenkins S, Gesenberg C, Gao Q, Sinz MW, Santone KS, Zvyaga T, Rajamani R, Klei HE, Colonno RJ, Grasela DM, Hughes E, Chien C, Adams S, Levesque PC, Li D, Zhu J, Meanwell NA, McPhee F. Discovery and Early Clinical Evaluation of BMS-605339, a Potent and Orally Efficacious Tripeptidic Acylsulfonamide NS3 Protease Inhibitor for the Treatment of Hepatitis C Virus Infection. J Med Chem 2014; 57:1708-29. [DOI: 10.1021/jm401840s] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Paul M. Scola
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Alan Xiangdong Wang
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Andrew C. Good
- Department of Computer-Assisted Drug Design, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Li-Qiang Sun
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Keith D. Combrink
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Jeffrey A. Campbell
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Jie Chen
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Yong Tu
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Ny Sin
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Brian L. Venables
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Sing-Yuen Sit
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Yan Chen
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Anthony Cocuzza
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Donna M. Bilder
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Stanley D’Andrea
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Barbara Zheng
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Piyasena Hewawasam
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Min Ding
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Jan Thuring
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Jianqing Li
- Department
of Discovery Chemical Synthesis, Bristol-Myers Squibb Research and Development, P.O.
Box 4000, Princeton, New Jersey 08543, United States
| | - Dennis Hernandez
- Department
of Virology Discovery Biology, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Fei Yu
- Department
of Virology Discovery Biology, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Paul Falk
- Department
of Virology Discovery Biology, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Guangzhi Zhai
- Department
of Virology Discovery Biology, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Amy K. Sheaffer
- Department
of Virology Discovery Biology, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Chaoqun Chen
- Department
of Virology Discovery Biology, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Min S. Lee
- Department
of Virology Discovery Biology, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Diana Barry
- Department
of Virology Discovery Biology, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Jay O. Knipe
- Department
of Pharmaceutical Candidate Optimization, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Wenying Li
- Department
of Pharmaceutical Candidate Optimization, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Yong-Hae Han
- Department
of Pharmaceutical Candidate Optimization, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Susan Jenkins
- Department
of Pharmaceutical Candidate Optimization, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Christoph Gesenberg
- Department
of Pharmaceutical Candidate Optimization, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Qi Gao
- Department of Pharmaceutical Development, Bristol-Myers Squibb Research and Development, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Michael W. Sinz
- Department
of Pharmaceutical Candidate Optimization, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Kenneth S. Santone
- Department
of Pharmaceutical Candidate Optimization, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Tatyana Zvyaga
- Department of
Lead Discovery and Optimization, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Ramkumar Rajamani
- Department of Computer-Assisted Drug Design, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Herbert E. Klei
- Department of Computer-Assisted Drug Design, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Richard J. Colonno
- Department
of Virology Discovery Biology, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Dennis M. Grasela
- Department of Early Clinical and Translational
Research, Discovery Medicine—Virology, Bristol-Myers Squibb Research and Development, Hopewell, New Jersey 08543, United States
| | - Eric Hughes
- Department of Early Clinical and Translational
Research, Discovery Medicine—Virology, Bristol-Myers Squibb Research and Development, Hopewell, New Jersey 08543, United States
| | - Caly Chien
- Department of Early Clinical and Translational
Research, Discovery Medicine—Virology, Bristol-Myers Squibb Research and Development, Hopewell, New Jersey 08543, United States
| | - Stephen Adams
- Department
of Pharmaceutical Candidate Optimization, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Paul C. Levesque
- Department
of Pharmaceutical Candidate Optimization, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Danshi Li
- Department
of Pharmaceutical Candidate Optimization, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Jialong Zhu
- Department
of Pharmaceutical Candidate Optimization, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Nicholas A. Meanwell
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Fiona McPhee
- Department
of Virology Discovery Biology, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
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9
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Gising J, Belfrage AK, Alogheli H, Ehrenberg A, Åkerblom E, Svensson R, Artursson P, Karlén A, Danielson UH, Larhed M, Sandström A. Achiral pyrazinone-based inhibitors of the hepatitis C virus NS3 protease and drug-resistant variants with elongated substituents directed toward the S2 pocket. J Med Chem 2013; 57:1790-801. [PMID: 23517538 DOI: 10.1021/jm301887f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Herein we describe the design, synthesis, inhibitory potency, and pharmacokinetic properties of a novel class of achiral peptidomimetic HCV NS3 protease inhibitors. The compounds are based on a dipeptidomimetic pyrazinone glycine P3P2 building block in combination with an aromatic acyl sulfonamide in the P1P1' position. Structure-activity relationship data and molecular modeling support occupancy of the S2 pocket from elongated R(6) substituents on the 2(1H)-pyrazinone core and several inhibitors with improved inhibitory potency down to Ki = 0.11 μM were identified. A major goal with the design was to produce inhibitors structurally dissimilar to the di- and tripeptide-based HCV protease inhibitors in advanced stages of development for which cross-resistance might be an issue. Therefore, the retained and improved inhibitory potency against the drug-resistant variants A156T, D168V, and R155K further strengthen the potential of this class of inhibitors. A number of the inhibitors were tested in in vitro preclinical profiling assays to evaluate their apparent pharmacokinetic properties. The various R(6) substituents were found to have a major influence on solubility, metabolic stability, and cell permeability.
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Affiliation(s)
- Johan Gising
- Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry, BMC, Uppsala University, Box 574, SE-751 23 Uppsala, Sweden
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10
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Hotiana HA, Haider MK. Structural modeling of HCV NS3/4A serine protease drug-resistance mutations using end-point continuum solvation and side-chain flexibility calculations. J Chem Inf Model 2013; 53:435-51. [PMID: 23305404 DOI: 10.1021/ci3004754] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Computational methods of modeling protein-ligand interactions have gained widespread application in modern drug discovery. In continuum solvation-based methods of binding affinity estimation, limited description of solvent environment and protein flexibility is traded for a time scale that fits medicinal chemistry test cycles. The results of this speed-accuracy trade-off have been promising in terms of modeling structure-activity relationships of ligand series against protein targets. The potential of these approaches in recapitulating structural and energetic effects of resistance mutations, which involve large changes in binding affinity, remains relatively unexplored. We used continuum solvation binding affinity predictions and graph theory-based flexibility calculations to model thirteen drug resistance mutations in HCV NS3/4A serine protease, against three small-molecule inhibitors, with a 2-fold objective: quantitative assessment of binding energy predictions against experimental data and elucidation of structural/energetic determinants of resistance. The results show statistically significant correlation between predicted and experimental binding affinities, with R(2) and predictive index of up to 0.83 and 0.91, respectively. The level of accuracy was consistent with what has been reported for the inverse problem of binding affinity estimation of congeneric ligands against the same target. The quality of predictions was poor for mutations involving induced-fit effects, primarily, because of the lack of entropy terms. Flexibility analysis explained this discrepancy by indicating characteristic changes in side-chain mobility of a key binding site residue. The combined results from two approaches provide novel insights regarding the molecular mechanism of resistance. NS3/4A inhibitors, with large P2 substituents, derive high affinity with optimal van der Waals interactions in the S2 subsite, in order to overcome unfavorable desolvation and entropic cost of induced-fit effects. High-level resistance mutations tend to increase the desolvation and/or entropic barrier to ligand binding. The lead optimization strategies should, therefore, address the balance of these opposing energetic contributions in both the wild-type and mutant target.
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Affiliation(s)
- Hajira Ahmed Hotiana
- Undergraduate Program in Science, Department of Biology, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences, Lahore 54792, Pakistan
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Shiryaev SA, Cheltsov AV, Strongin AY. Probing of exosites leads to novel inhibitor scaffolds of HCV NS3/4A proteinase. PLoS One 2012; 7:e40029. [PMID: 22768327 PMCID: PMC3388044 DOI: 10.1371/journal.pone.0040029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Accepted: 06/01/2012] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Hepatitis C is a treatment-resistant disease affecting millions of people worldwide. The hepatitis C virus (HCV) genome is a single-stranded RNA molecule. After infection of the host cell, viral RNA is translated into a polyprotein that is cleaved by host and viral proteinases into functional, structural and non-structural, viral proteins. Cleavage of the polyprotein involves the viral NS3/4A proteinase, a proven drug target. HCV mutates as it replicates and, as a result, multiple emerging quasispecies become rapidly resistant to anti-virals, including NS3/4A inhibitors. METHODOLOGY/PRINCIPAL FINDINGS To circumvent drug resistance and complement the existing anti-virals, NS3/4A inhibitors, which are additional and distinct from the FDA-approved telaprevir and boceprevir α-ketoamide inhibitors, are required. To test potential new avenues for inhibitor development, we have probed several distinct exosites of NS3/4A which are either outside of or partially overlapping with the active site groove of the proteinase. For this purpose, we employed virtual ligand screening using the 275,000 compound library of the Developmental Therapeutics Program (NCI/NIH) and the X-ray crystal structure of NS3/4A as a ligand source and a target, respectively. As a result, we identified several novel, previously uncharacterized, nanomolar range inhibitory scaffolds, which suppressed of the NS3/4A activity in vitro and replication of a sub-genomic HCV RNA replicon with a luciferase reporter in human hepatocarcinoma cells. The binding sites of these novel inhibitors do not significantly overlap with those of α-ketoamides. As a result, the most common resistant mutations, including V36M, R155K, A156T, D168A and V170A, did not considerably diminish the inhibitory potency of certain novel inhibitor scaffolds we identified. CONCLUSIONS/SIGNIFICANCE Overall, the further optimization of both the in silico strategy and software platform we developed and lead compounds we identified may lead to advances in novel anti-virals.
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Affiliation(s)
- Sergey A. Shiryaev
- Inflammatory and Infectious Disease Center, Sanford-Burnham Medical Research Institute, La Jolla, California, United States of America
| | - Anton V. Cheltsov
- R&D Department, Q-MOL L.L.C., San Diego, California, United States of America
- * E-mail: (AVC) (AC); (AYS) (AS)
| | - Alex Y. Strongin
- Inflammatory and Infectious Disease Center, Sanford-Burnham Medical Research Institute, La Jolla, California, United States of America
- * E-mail: (AVC) (AC); (AYS) (AS)
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P2–P1′ macrocyclization of P2 phenylglycine based HCV NS3 protease inhibitors using ring-closing metathesis. Bioorg Med Chem 2011; 19:4917-27. [DOI: 10.1016/j.bmc.2011.06.064] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Revised: 06/21/2011] [Accepted: 06/22/2011] [Indexed: 12/18/2022]
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Small molecules targeting hepatitis C virus-encoded NS5A cause subcellular redistribution of their target: insights into compound modes of action. J Virol 2011; 85:6353-68. [PMID: 21507963 DOI: 10.1128/jvi.00215-11] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The current standard of care for hepatitis C virus (HCV)-infected patients consists of lengthy treatment with interferon and ribavirin. To increase the effectiveness of HCV therapy, future regimens will incorporate multiple direct-acting antiviral (DAA) drugs. Recently, the HCV-encoded NS5A protein has emerged as a promising DAA target. Compounds targeting NS5A exhibit remarkable potency in vitro and demonstrate early clinical promise, suggesting that NS5A inhibitors could feature in future DAA combination therapies. Since the mechanisms through which these molecules operate are unknown, we have used NS5A inhibitors as tools to investigate their modes of action. Analysis of replicon-containing cells revealed dramatic phenotypic alterations in NS5A localization following treatment with NS5A inhibitors; NS5A was redistributed from the endoplasmic reticulum to lipid droplets. The NS5A relocalization did not occur in cells treated with other classes of HCV inhibitors, and NS5A-targeting molecules did not cause similar alterations in the localization of other HCV-encoded proteins. Time course analysis of the redistribution of NS5A revealed that the transfer of protein to lipid droplets was concomitant with the onset of inhibition, as judged by the kinetic profiles for these compounds. Furthermore, analysis of the kinetic profile of inhibition for a panel of test molecules permitted the separation of compounds into different kinetic classes based on their modes of action. Results from this approach suggested that NS5A inhibitors perturbed the function of new replication complexes, rather than acting on preformed complexes. Taken together, our data reveal novel biological consequences of NS5A inhibition, which may help enable the development of future assay platforms for the identification of new and/or different NS5A inhibitors.
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