| Autor: |
Kalhor H; Cellular and Molecular Research Center, Qom University of Medical Sciences, Qom, Iran.; Molecular Medicine Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran., Sadeghi S; Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran., Abolhasani H; Cellular and Molecular Research Center, Qom University of Medical Sciences, Qom, Iran.; Spiritual Health Research Center, Qom University of Medical Sciences, Qom, Iran.; Department of Pharmacology, School of Medicine, Qom University of Medical Sciences, Qom, Iran., Kalhor R; Cellular and Molecular Research Center, Qom University of Medical Sciences, Qom, Iran.; Department of Genetics, Colleague of Sciences, Kazerun branch, Islamic Azad University, Kazerun, Iran., Rahimi H; Molecular Medicine Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran. |
| Abstrakt: |
Most recently, the new coronavirus (SARS-CoV-2) has been recognized as a pandemic by the World Health Organization (WHO) while this virus shares substantial similarity with SARS-CoV. So far, no definitive vaccine or drug has been developed to cure Covid-19 disease, since many important aspects about Covid-19 such as pathogenesis and proliferation pathways are still unclear. It was proven that human ACE2 is the main receptor for the entry of Covid-19 into lower respiratory tract epithelial cells through interaction with SARS-CoV-2 S protein. Based on this observation, it is expected that the virus infection can be inhibited if protein-protein interaction is prevented. In this study, using structure-based virtual screening of FDA databases, several lead drugs were discovered based on the ACE2-binding pocket of SARS-CoV-2 S protein. Then, binding affinity, binding modes, critical interactions, and pharmaceutical properties of the lead drugs were evaluated. Among the previously approved drugs, Diammonium Glycyrrhizinate, Digitoxin, Ivermectin, Rapamycin, Rifaximin, and Amphotericin B represented the most desirable features, and can be possible candidates for Covid-19 therapies. Furthermore, molecular dynamics (MD) simulation was accomplished for three S protein/drug complexes with the highest binding affinity and best conformation and binding free energies were also computed with the Molecular Mechanics/Poisson-Boltzmann Surface Area (MM/PBSA) method. Results demonstrated the stable binding of these compounds to the S protein; however, in order to confirm the curative effect of these drugs, clinical trials must be done. |
