Some coumarins and benzoxazinones as potent paraoxonase 1 inhibitors

Journal of Enzyme Inhibition and Medicinal Chemistry
Mert Olgun KaratasOktay Arslan

Abstract

In this study, we aimed to investigate the effect of some coumarin and benzoxazinone derivatives on the activity of human PON1. Human serum paraoxonase 1 was purified from fresh human serum blood by two-step procedures that are ammonium sulfate precipitation (60-80%) and then hydrophobic interaction chromatography (Sepharose 4B, L-tyrosine and 1-napthylamine). The enzyme was purified 232-fold with a final specific activity of 27.1 U/mg. In vitro effects of some previously synthesized ionic coumarin or benzoxazinone derivatives (1-21) on purified PON1 activity were investigated. Compound 14 (1-(2,3,4,5,6)-pentamethylbenzyl-3-(6,8-dimethyl-2H-chromen-2-one-4-yl))benzimidazolium chloride was found out as the strongest inhibitor (IC50 = 7.84 μM) for PON1 among the compounds. Kinetic investigation and molecular docking study were evaluated for one of the most active compounds (compound 12) and obtained data showed that this compound is competitive inhibitor of PON1 and interact with Leu262 and Ser263 in the active site of PON1. Moreover, coumarin derivatives were found out as the more potent inhibitors for PON1 than benzoxazinone derivatives.

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Citations

Jun 11, 2019·Drug and Chemical Toxicology·Şükrü BeydemirAhmet Yalçın
Oct 4, 2019·Journal of Biochemical and Molecular Toxicology·Başak GökçeOktay Arslan
Jan 19, 2021·Beni-Suef University Journal of Basic and Applied Sciences·Sulaiman C TIndira Balachandran
Sep 7, 2018·International Journal of Biological Macromolecules·Antonella FaisAmit Kumar

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