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  • Title: Diosmin, a bioflavonoid reverses alterations in blood pressure, nitric oxide, lipid peroxides and antioxidant status in DOCA-salt induced hypertensive rats.
    Author: Silambarasan T, Raja B.
    Journal: Eur J Pharmacol; 2012 Mar 15; 679(1-3):81-9. PubMed ID: 22266490.
    Abstract:
    The present study was aimed to evaluate the antihypertensive effect of diosmin in deoxycorticosterone acetate (DOCA)-salt induced hypertension in male Wistar rats. Hypertension was induced in uninephrectomized rats by weekly twice subcutaneous injection of DOCA (25 mg/kg body weight) and 1% NaCl in the drinking water for six consecutive weeks. The important pathological events that occurred in DOCA-salt treated rats were significant increase in systolic, diastolic blood pressure, sodium and chloride in serum and lipid peroxidation products (thiobarbituric acid reactive substances, lipid hydroperoxides and conjugated dienes) in plasma and tissues (liver, kidney, heart and aorta) and significant decrease in serum potassium, total nitrite and nitrate levels in plasma. The activities of hepatic aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, and gamma-glutamyl transpeptidase and the levels of renal urea, uric acid, creatinine in serum, water intake, and organ weight (kidney and heart) were significantly increased in DOCA-salt hypertensive rats. DOCA-salt treated rats also showed a significant decrease in body weight, activities of superoxide dismutase, catalase and glutathione peroxidase in erythrocyte and tissues and the levels of reduced glutathione, vitamin C and vitamin E in plasma and tissues. Treatment with diosmin (25, 50 and 100 mg/kg body weight) brings back all the above parameters to near normal level, in which 50 mg/kg body weight showed the highest effect than that of other two doses. Histopathology of heart and kidney also confirmed the protective effect of diosmin. Thus the experiment clearly showed that diosmin acts as an antihypertensive agent against DOCA-salt induced hypertension.
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