Theoretical insight into mechanism of antioxidant capacity of atorvastatin and its o-hydroxy and p-hydroxy metabolites, using DFT methods
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Fecha
2022Autor
Duque L
Guerrero G
Colorado J.H
Restrepo J.A
Vélez E.
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Atorvastatin (ATV) inhibits the HMG-CoA reductase. This compound is believed to exhibit high radical scavenging abilities against lipoprotein oxidation, warranting an investigation of its antioxidant capacity. In this study a series of quantum chemical parameters were calculated, at B3LYP functional and 6-31+G(d,p) basis set and integral equation formalism (IEF-PCM) method, to describe molecular properties and clarify the radical scavenging mechanism of Atorvastatin and its hydroxy ortho and para metabolites. Calculations of global reactivity descriptors and the thermodynamic parameters suggested that both the ATV and its o-OH and p-OH metabolites are favorable antioxidants, and that the main antioxidant mechanism follows the sequential proton loss electron transfer (SPLET). The hydrogen of O–H group of carboxylic acid on the three compounds is the most likely for abstraction, indicating that inhibiting free radicals is mainly due to this hydrogen. ATV and its metabolites have lower values of Proton Affinity (PA) than ascorbic acid. © 2022 The Author(s)
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