Abstract
Present study investigates the effect of metal accumulation on antioxidant level and mitochondrial enzymes function in muscle of Oreochromis mossambicus. Metal accumulation in muscle upregulated stress marker malondialdehyde and the activity of different antioxidant enzymes with no significant alteration in glutathione system. Metal exposure to fish muscle decreased the activity of mitochondrial enzymes. AMP deaminase, aldolase, cytochrome C oxidase and lipoamide reductase showed positive correlation with acetylcholinesterase, glutathione reductase, reduced glutathione and glutathione peroxidase, but negative correlation with superoxide dismutase, catalase, glutathione S-transferase and thiobarbituric acid reactive substance. Analysis of these biomarkers clearly indicates the change in oxidative load in muscle tissues and provides insight to muscle response to the metal exposure. Therefore, the study outlines the potential use of biomarkers in context of muscle mitochondrial enzymes relating to oxidative processes that take place in the fish muscle following metal exposure and toxicity.
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