A study of the mechanism of α-glucosidase inhibition by rapeseed polyphenols
Year: 2025
Type: article
Abstract: Type II diabetes mellitus is a non-communicable disease with high morbidity in today's world, and the inhibition of α-glucosidase is an effective modality for its amelioration and treatment. In the present study, some rapeseed polyphenols were identified using HPLC fingerprinting techniques. The inhibitory activities of procyanidin B2, caffeic acid, sinapic acid, and sinapine were evaluated through UV, fluorescence, infrared, and circular dichroism spectroscopy. Additionally, molecular docking and molecular dynamics simulation were employed to elucidate the inhibitory mechanism. The IC50 value of procyanidin B2 and its Ki were determined to be 0.09 ± 0.01 mg/mL and 1.13 ± 0.07 mg/mL, respectively. The calculated binding energy from AutoDock was −9.0 kcal/mol, and the end-state free energy was −29.05 ± 8.31 kcal/mol, indicating strong inhibitory activity. Consequently, procyanidin B2 is a promising anti-diabetic component. Notably, key residues such as ASP327, ASP443, ASP542, and ARG526 were identified, which interacted with the inhibitor through hydrogen bonding and van der Waals forces, thereby affecting substrate binding. • HPLC fingerprints of rapeseed polyphenols were established. •Procyanidin B2 is the most potent inhibitors against α-glucosidase. •The inhibitors bind to α-glucosidase by hydrogen bonding and Van der Waals forces. •ASP327, ASP443, ASP542, ARG526 are the effective targets of the inhibitors.
Source: LWT
Authors: Yunfeng Ma, Jinting Sun, Bao-Lin Xiao
Institution: Henan University
Language: English
Subfield: Endocrinology, Diabetes and Metabolism
Field: Medicine
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $3,240
Award: G7492370527
OpenAlex ID: W4409126812