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Chen J, Farraj RA, Limonta D, Tabatabaei Dakhili SA, Kerek EM, Bhattacharya A, Reformat FM, Mabrouk OM, Brigant B, Pfeifer TA, McDermott MT, Ussher JR, Hobman TC, Glover JNM, Hubbard BP. Reversible and irreversible inhibitors of coronavirus Nsp15 endoribonuclease. J Biol Chem 2023; 299:105341. [PMID: 37832873 PMCID: PMC10656235 DOI: 10.1016/j.jbc.2023.105341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 10/04/2023] [Accepted: 10/07/2023] [Indexed: 10/15/2023] Open
Abstract
The emergence of severe acute respiratory syndrome coronavirus 2, the causative agent of coronavirus disease 2019, has resulted in the largest pandemic in recent history. Current therapeutic strategies to mitigate this disease have focused on the development of vaccines and on drugs that inhibit the viral 3CL protease or RNA-dependent RNA polymerase enzymes. A less-explored and potentially complementary drug target is Nsp15, a uracil-specific RNA endonuclease that shields coronaviruses and other nidoviruses from mammalian innate immune defenses. Here, we perform a high-throughput screen of over 100,000 small molecules to identify Nsp15 inhibitors. We characterize the potency, mechanism, selectivity, and predicted binding mode of five lead compounds. We show that one of these, IPA-3, is an irreversible inhibitor that might act via covalent modification of Cys residues within Nsp15. Moreover, we demonstrate that three of these inhibitors (hexachlorophene, IPA-3, and CID5675221) block severe acute respiratory syndrome coronavirus 2 replication in cells at subtoxic doses. This study provides a pipeline for the identification of Nsp15 inhibitors and pinpoints lead compounds for further development against coronavirus disease 2019 and related coronavirus infections.
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Affiliation(s)
- Jerry Chen
- Department of Pharmacology, University of Alberta, Edmonton, Alberta, Canada
| | - Rabih Abou Farraj
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Daniel Limonta
- Department of Cell Biology, Li Ka Shing Institute of Virology, University of Alberta, Edmonton, Alberta, Canada; Quantitative Biosciences Institute (QBI), University of California San Francisco, San Francisco, California, USA; Gladstone Institute of Data Science and Biotechnology, Gladstone Institutes, San Francisco, California, USA
| | | | - Evan M Kerek
- Department of Pharmacology, University of Alberta, Edmonton, Alberta, Canada
| | - Ashim Bhattacharya
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Ontario, Canada
| | - Filip M Reformat
- Department of Pharmacology, University of Alberta, Edmonton, Alberta, Canada
| | - Ola M Mabrouk
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Benjamin Brigant
- Department of Pharmacology, University of Alberta, Edmonton, Alberta, Canada; Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - Tom A Pfeifer
- High Throughput Biology Facility, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Mark T McDermott
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada
| | - John R Ussher
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Tom C Hobman
- Department of Cell Biology, Li Ka Shing Institute of Virology, University of Alberta, Edmonton, Alberta, Canada
| | - J N Mark Glover
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Basil P Hubbard
- Department of Pharmacology, University of Alberta, Edmonton, Alberta, Canada; Department of Pharmacology and Toxicology, University of Toronto, Toronto, Ontario, Canada.
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El-Kosasy AM, Ayad MF, Mabrouk OM. Validated chemometrics-assisted spectrophotometric methods for simultaneous determination of bisphenol-A-diglycidyl ether and some of its reaction products in canned foods in the Egyptian market. Spectrochim Acta A Mol Biomol Spectrosc 2018; 203:443-449. [PMID: 29894958 DOI: 10.1016/j.saa.2018.05.120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 05/26/2018] [Accepted: 05/29/2018] [Indexed: 06/08/2023]
Abstract
Two multivariate calibration methods, namely principal component regression (PCR) and partial least squares (PLS-2) have been developed, validated and compared for the simultaneous determination of bisphenol-A-diglycidyl ether (BADGE) and some of its reaction products, including BADGE·HCl·H2O, BADGE·H2O and BADGE·2HCl. Chemometrics allowed rapid, accurate and precise simultaneous quantification of the analytes of interest which was not possible by other spectrophotometric methods due to their severe spectral overlap. PCR and PLS-2 techniques successfully quantified BADGE, BADGE·HCl·H2O, BADGE·H2O and BADGE·2HCl in the ranges of 1.4-3.4, 1-5, 1-4.2 and 1-7 μg mL-1, respectively. The constructed models were validated according to the International Conference on Harmonization guidelines and successfully applied for the determination of these compounds in pure form, laboratory prepared mixtures and in various types of canned foods following the limits and regulations of the European Union (EU) where satisfactory recovery results were obtained.
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Affiliation(s)
- Amira M El-Kosasy
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Ain Shams University, Abbassia, 11566 Cairo, Egypt
| | - Miriam F Ayad
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Ain Shams University, Abbassia, 11566 Cairo, Egypt
| | - Ola M Mabrouk
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Ain Shams University, Abbassia, 11566 Cairo, Egypt.
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El-Kosasy AM, Abdel-Aziz O, Ayad MF, Mabrouk OM. HPLC Method for Simultaneous Determination of Bisphenol-A-Diglycidyl Ether and Some of Its Reaction Products in Canned Foods Using Photodiode Array Detector. J Chromatogr Sci 2018; 56:920-932. [DOI: 10.1093/chromsci/bmy069] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 06/12/2018] [Indexed: 11/13/2022]
Affiliation(s)
- Amira M El-Kosasy
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo, Egypt
| | - Omar Abdel-Aziz
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo, Egypt
| | - Miriam F Ayad
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo, Egypt
| | - Ola M Mabrouk
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo, Egypt
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