In vitro antidiabetic effects of selected fruits and vegetables against glycosidase and aldose reductase

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Abstract
In vitro antidiabetic effect of fruits and vegetables with reports as folk remedies were investigated. The antidiabetic effects were evaluated by comparing the inhibitory properties of α‐glycosidase, aldose reductase, and antioxidant activity. The results indicated that lychee extract exhibited the best dose‐dependent inhibitory activity against α‐glycosidase with IC50 of 10.4 mg/mL, and lemon peel extract exhibited aldose reductase inhibitory potential with IC50 value at 3.63 mg/mL. Besides, the result also showed that the inhibitory effects of blueberry and plum against α‐glycosidase were strong among the fruits samples. Bitter gourd and eggplant demonstrated significant inhibitory potential against aldose reductase, with IC50 values at 8.55 mg/mL and 8.06 mg/mL, respectively. The result from correlation analysis part showed that the antioxidant activities of selected fruits and vegetables were found related to their health beneficial effects, as there was positive correlations between total flavonoids content (TFC) and aldose reductase inhibitory activity (r2 = 0.556).
Funding Information
  • Beijing Normal University-Hong Kong Baptist University United International College, China (UICRG 201316, UICRG 201402)

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