Background: Diosmin is a flavonoid obtained from the citrus fruits of the plants. Diosmin
has blood lipid lowering activities, antioxidant activity, enhances venous tone and microcirculation,
protects capillaries, mainly by reducing systemic oxidative stress.
Objective: The present study demonstrates the potential of Diosmin against the enzymes aldose reductase,
α-glucosidase, and α-amylase involved in diabetes and its complications by in vitro evaluation
and reverse molecular docking studies.
Methods: The assay of aldose reductase was performed by using NADPH as starting material and
DL-Glyceraldehyde as a substrate. DNS method was used for alpha amylase inhibition and in alpha
glucosidase inhibitory activity p-nitrophenyl glucopyranoside (pNPG) was used as substrate. The
reverse molecular docking studies was performed by using Molegro software (MVD) with grid resolution
of 30 Å.
Results: Diosmin shows potent inhibitory effect against aldose reductase (IC50:333.88±0.04
μg/mL), α-glucosidase (IC50:410.3±0.01 μg/mL) and α-amylase (IC50: 404.22±0.02 μg/mL) respectively.
The standard drugs shows moderate inhibitory activity for enzymes. The MolDock
Score of Diosmin was -224.127 against aldose reductase, -168.17 against α-glucosidase and -
176.013 against α-amylase respectively, which was much higher than standard drugs.
Conclusion: From the result it was concluded that diosmin was a potentially inhibitor of aldose reductase,
alpha amylase and alpha glucosidase enzymes then the standard drugs and it will be helpful
in the management of diabetes and its complications. This will also be benevolent to decrease
the socio economical burden on the middle class family of the society.