A-549 cell line 1 A549 Cells 1 Antiviral Agents 1 Article 1 COVID-19 1 Cell Line 1 Cell Survival 1 Computer Simulation 1 Down-Regulation 1 Gene Expression Regulation 1 HSC-3 cell line 1 Humans 1 MCF-7 Cells 1 MCF-7 cell line 1 Main protease (Mpro) Models, Molecular 1 Molecular Dynamics Simulation 1 Plant Extracts 1 Protein Conformation 1 SARS-CoV-2 1 Serine Endopeptidases 1 Severe acute respiratory syndrome coronavirus 2 1 TMPRSS2 protein, human 1 Transmembrane protease serine 2 (TMPRSS2) 1 Viral Matrix Proteins 1 Virus Internalization 1 Withania somnifera 1 Withanolides 1 Withanosides 1 animal cell 1