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Hypoglycemic potential and xanthine-oxidase (XO) activity of polyphenols from faba bean were evaluated in the 3T3-L1 cell line, and an interaction study in silico with XO was performed with considerable bioactive components of acetone extract of faba beans. The protonated and fragmented behavior of acetone seed extract revealed the presence of gallic acid (MS/MS, m/z 169) and catechin (MSn, m/z 288.3). Flow cytometry study explained the effect of hydrogen peroxide (H2O2) on cell line as cell death was increased from 9.72 to 41.66% as compared to the control (without H2O2). The atomic force microscopy (AFM), scanning electron microscopy and reactive oxygen species measurement also confirmed the protective effect of polyphenols in the 3T3-L1 cell lines. Oxidative stress through propidium iodide and 4′,6-diamidino-2-phenylindole staining demonstrated that the apoptotic ratio was 0.35 ± 2.62 (P &amp;lt; 0.05) and 30 ± 2.54% in H2O2-treated cells, respectively, as compared to control. The observations of flow cytometry and confocal microscopy marked the effect of seed extract (0.86 ± 0.031, 3.52 ± 0.52, P &amp;lt; 0.05), on glucose uptake in cells through the better relative fluorescence intensity than that of the control. Moreover, molecular docking and molecular dynamics simulation studies gave an insight into the predicted residues that hold favorable polyphenolic-specific interactions. The probable binding modes of the gallic acid and catechin from this study may extend the knowledge of the XO-polyphenol interactions and offered the way to design the analogs of acetone seed extract with reduced toxicity.

toxicology research

Investigation of hypoglycemic effects, oxidative stress potential and xanthine-oxidase activity of polyphenols (gallic acid, catechin) derived from faba bean on 3T3-L1 cell line: insights into molecular docking and simulation study