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suck abstract from ncbi

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  • In silico and in vitro analysis of small molecules and natural compounds targeting the 3CL protease of feline infectious peritonitis virus #MMPMID31863793
  • Theerawatanasirikul S; Kuo CJ; Phetcharat N; Lekcharoensuk P
  • Antiviral Res 2020[Feb]; 174 (ä): 104697 PMID31863793show ga
  • The computational search of chemical libraries has been used as a powerful tool for the rapid discovery of candidate compounds. To find small molecules with anti-feline infectious peritonitis virus (FIPV) properties, we utilized a virtual screening technique to identify the active site on the viral protease for the binding of the available natural compounds. The protease 3CL (3CL(pro)) plays an important role in the replication cycle of FIPV and other viruses within the family Coronaviridae. The 15 best-ranked candidate consensus compounds, based on three docking tools, were evaluated for further assays. The protease inhibitor assay on recombinant FIPV 3CL(pro) was performed to screen the inhibitory effect of the candidate compounds with IC50 ranging from 6.36 +/- 2.15 to 78.40 +/- 2.60 muM. As determined by the cell-based assay, the compounds NSC345647, NSC87511, and NSC343256 showed better EC50 values than the broad-spectrum antiviral drug ribavirin and the protease inhibitor lopinavir, under all the test conditions including pre-viral entry, post-viral entry, and prophylactic activity. The NSC87511 particularly yielded the best selective index (>4; range of SI = 13.80-22.90). These results indicated that the natural small-molecular compounds specifically targeted the 3CL(pro) of FIPV and inhibited its replication. Structural modification of these compounds may generate a higher anti-viral potency for the further development of a novel therapy against FIP.
  • |Animals[MESH]
  • |Antiviral Agents/*chemistry/pharmacology[MESH]
  • |Catalytic Domain[MESH]
  • |Cats[MESH]
  • |Computer Simulation[MESH]
  • |Coronavirus, Feline/chemistry/drug effects/*enzymology/genetics[MESH]
  • |Drug Evaluation, Preclinical[MESH]
  • |Feline Infectious Peritonitis/*virology[MESH]
  • |Kinetics[MESH]
  • |Peptide Hydrolases/*chemistry/genetics/metabolism[MESH]
  • |Protease Inhibitors/*chemistry/pharmacology[MESH]
  • |Ribavirin/chemistry/pharmacology[MESH]
  • |Viral Proteins/*chemistry/genetics/metabolism[MESH]

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  • suck abstract from ncbi

    104697 ä.174 2020