Nephroprotective Hepatoprotective Potential and Antioxidant Role of Carob Pods (Cerotonia siliqua L.) against Carbon Tetrachloride-induced Toxicity in Rats

Objective: The aims of current study are the evaluation of the protective effect and antioxidant role of carob pods against carbon tetrachloride (CCl4)-induced oxidative stress, hepatotoxicity and nephropathy. Material and Methods: The present experiment was designed as I (control), II (0.5 ml/kg CCl4), III (%10 CP), IV (CCl4 0.5 ml/kg+%10 CP) groups. While rats in group I and III were fed with a diet without CCl4, II, and IV groups received twice 0.5 ml/kg/week, where IV group additionally received %10 CP supplementation for 50 days. The protective roles and antioxidant activity of the CP supplementation feed against CCl4-induced oxidative stress and toxicity were evaluated by histopathological changes, measuring hepatic and renal damage biomarkers (HRDB), antioxidant defence system constituents (ADSC) and malondialdehyde (MDA) parameters in the erythrocyte, liver, brain, kidney and spleen tissues of rats. Results: According to the results, the biochemical analysis showed a considerable increase in the serum AST (aspartate aminotransferase), ALT (alanin aminotransferase), GGT (gamma glutamyl transpeptidase) and LDH (lactate dehydrogenase) enzymes, creatinine and urea, and decrease in the group II as compared to that of I group. On contrary, such parameters were decreased in IV group as compared to that of group II. In addition, the results showed that CP supplementation diet restored the CCl4 induced MDA (malondialdehyde) and ADSC towards to control. The hepatoprotection of CP is further substantiated by the almost normal histological findings in IV group against degenerative changes in II group. Protective effects by CP are further substantiated by the almost normal HRDB for kidney and liver in IV treated group as against degenerative changes in the II treated rats. Conclusion: The results indicated that CP could be as an important as diet-derived antioxidants in preventing oxidative damage in the tissues by reducing the MDA or inhibiting the production of CCl4-induced free radicals and liver and kidney destruction.