In vivo Protective Effects of Gallic Acid Isolated from Peltiphyllum peltatum against Sodium Fluoride-Induced Oxidative Stress in Erythrocytes

Gallic acid has been identified as an antioxidant component of the edible and medicinal plant Peltiphyllum peltatum. In the present study, its potential protective role against sodium fluoride (NaF)-induced oxidative stress in rat erythrocytes was examined. Oxidative stress was induced by NaF administration through drinking water (1030.675 mg m-3 for one week). Gallic acid at 10 mg kg-1 and 20 mg kg-1 and vitamin C for positive controls (10 mg kg-1) were administered daily intraperitoneally for one week prior to NaF administration. Thiobarbituric acid reactive substances, antioxidant enzyme activities (superoxide dismutase and catalase), and the level of reduced glutathione were evaluated in rat erythrocytes. Lipid peroxidation in NaF-exposed rats significantly increased (by 88.8 %) when compared to the control group (p<0.05). Pre-treatment with Gallic acid suppressed lipid peroxidation in erythrocytes in a dose-dependent manner. Catalase and superoxide dismutase enzyme activities and glutathione levels were reduced by NaF intoxication by 54.4 %, 63.69 %, and 42 % (p