Biomol Ther.  2022 Sep;30(5):427-434. 10.4062/biomolther.2022.037.

Abiraterone Acetate Attenuates SARS-CoV-2 Replication by Interfering with the Structural Nucleocapsid Protein

Affiliations
  • 1Department of Microbiology, College of Medicine, Hallym University, Chuncheon 24252, Republic of Korea
  • 2College of Pharmacy, Natural Products Research Institute, Seoul National University, Seoul 08826, Republic of Korea
  • 3Institute of Medical Science, College of Medicine, Hallym University, Chuncheon 24252, Republic of Korea
  • 4Department of Biochemistry, College of Natural Sciences, Chungbuk National University, Cheongju 28644, Republic of Korea
  • 5Department of Biomedical Sciences, College of Veterinary Medicine, King Faisal University, Al-hofuf 31982, Saudi Arabia
  • 6Department of Pharmacology, Faculty of Veterinary Medicine, Kafrelshikh University, Kafrelshikh 33516, Egypt

Abstract

The drug repurposing strategy has been applied to the development of emergency COVID-19 therapeutic medicines. Current drug repurposing approaches have been directed against RNA polymerases and viral proteases. Recently, we found that the inhibition of the interaction between the SARS-CoV-2 structural nucleocapsid (N) and spike (S) proteins decreased viral replication. In this study, drug repurposing candidates were screened by in silico molecular docking simulation with the SARS-CoV-2 structural N protein. In the ChEMBL database, 1994 FDA-approved drugs were selected for the in silico virtual screening against the N terminal domain (NTD) of the SARS-CoV-2 N protein. The tyrosine 109 residue in the NTD of the N protein was used as the center of the ligand binding grid for the docking simulation. In plaque forming assays performed with SARS-CoV-2 infected Vero E6 cells, atovaquone, abiraterone acetate, and digoxin exhibited a tendency to reduce the size of the viral plagues without affecting the plaque numbers. Abiraterone acetate significantly decreased the accumulation of viral particles in the cell culture supernatants in a concentration-dependent manner. In addition, abiraterone acetate significantly decreased the production of N protein and S protein in the SARS-CoV-2-infected Vero E6 cells. In conclusion, abiraterone acetate has therapeutic potential to inhibit the viral replication of SARS-CoV-2.

Keyword

Abiraterone acetate; Docking simulation; Drug repurposing; Nucleocapsid protein; SARS-CoV-2; Virtual screening
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