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Protective effect of olive oil and colocynth oil against cadmium-induced oxidative stress in the liver of Wistar rats.
Food and Chemical Toxicology 2015 April
Cadmium (Cd) is one of the most common heavy metal pollutants. It is accumulated particularly in liver and kidney. The present study examined the possible protective effect of olive oil and colocynth oil consumption against Cd-induced damage on plasma lipids and stress biochemical parameters of rats. Male albino Wistar rats were randomly divided into 6 groups of 5 animals each and treated orally with Cd (50 mg/l), olive oil and colocynth oil (4%) alone or in combination with cadmium for 8 weeks. It was shown that Cd exposure induced significant increases in the activities of serum alanine aminotransferase, aspartate aminotransferase, lipid peroxidation levels (MDA) and protein carbonyl contents in exposed groups of rats compared to control group while the antioxidant enzymes, reduced glutathione and vitamins (C, A and E) were significantly decreased. Co-treatment with olive oil or colocynth oil significantly improved the oxidative damage induced by Cd. The antioxidant potential in plasma and liver were markedly restored with a significant decline in MDA levels and activity of transaminases. In conclusion, these results suggest that olive oil or colocynth oil consumption could protect the rat liver against Cd-induced injury by increasing the activities of antioxidant enzymes and reducing oxidative stress.
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