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In this study, the protective role of grape seed and skin extract (GSSE) against high garlic dose-induced renal toxicity has been evaluated. Rats were intraperitoneally injected with garlic (5 g/kg bw) or GSSE (500 mg/kg bw) or a combination of garlic and GSSE at the same doses daily for one month. Renal oxidative stress markers and antioxidant status were evaluated. We also measured plasma creatinine and urea. Data showed that high garlic dose induced renal toxicity by increasing creatinine and urea and a pro-oxidative status characterized by increased malondialdehyde, carbonyl protein, calcium and H 2 O 2 , but decreased free iron. Unexpectedly garlic increased catalase but decreased peroxidase and superoxide dismutase activities. GSSE co-treatment counteracted almost all garlic-induced deleterious effects. In conclusion, high garlic dose induced a pro-oxidative state characterized by the Fenton reaction between H 2 O 2 and free iron, inducing Ca 2+ depletion, while GSSE exerted antioxidant properties and Ca 2+ repletion.

Protective effect of grape seed and skin extract on high dosage garlic-induced renal oxidative stress