Abstract
Objective: To evaluate the Tabernaemontana catharinensis ethyl acetate fraction hypoglycemic and antioxidant activity through the peripheral glycemic dosage and enzymatic tests. Methods: Male rats were divided into 6 groups: control, diabetic control, control extract 50, diabetic extract 50, control extract 80, diabetic extract 80. In diabetic group animals alloxan (150mg/Kg) was administered to induce Diabetes Mellitus. The animals were beheaded following 15 days of treatment with extract or distilled water and the blood was collected in order to perform oxidative stress tests. Results: The diabetic control group showed high levels of glucose, increased levels of thiobarbituric acid and superoxide dismutase activity, and decreased activity of catalase and glutathione peroxidase enzymes. The diabetic animals that received 50mg/Kg and 80mg/Kg of extract showed a decrease in thiobarbituric acid levels and an increase of glutathione peroxidase activity when compared to the diabetic control group. It was observed that only animals treated with 80mg/Kg of extract had positive results regarding superoxide dismutase. Conclusions: The Tabernaemontana catharinensis ethyl acetate fraction when orally administered for 14 consecutive days at doses of 50mg/Kg and 80mg/Kg reduces the oxidative stress induced by alloxan administration
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