ANTIOXIDATIVE AND INHIBITION POTENCY OF CYNODONTIN

Abstract

The antioxidant activity of cynodontin was studied in the absence and the presence of free radical species. This in silico study was performed in water and benzene, with the aim to simulate polar and non-polar environment. To determine the most probable mechanism of antioxidant action, density functional theory (DFT) was employed. The change in reaction enthalpy of cynodontin with three different free radicals (hydroxyl, hydroperoxyl, and methyl peroxyl radical) were examined and presented. SET-PT (Single Electron Transfer – Proton Transfer) mechanism is not an operative mechanism of antioxidant action. The obtained results imply that the possible mechanism of antioxidant action in water is SPLET (Sequential Proton Loss Electron Transfer), while in benzene HAT (Hydrogen atom transfer) and SPLET are competitive mechanisms. The molecular docking study was performed in order to estimate the inhibition potency of the investigated compound toward human leukocyte elastase (HLE). The obtained results indicate that numerous interactions determine the inhibition activity towards the investigated protein.