Subacute oral toxicity of chlorpyriphos and protective effect of green tea extract

Subacute oral toxicity of chlorpyriphos and protective effect of green tea extract

Author: S. Mahaboob Khan and Gurjot Kour

This paper reports the effect of green tea administration following subacute toxicity caused by exposure to organophosphorus pesticide chlorpyriphos in liver of rats. Four groups containing five male Sprague–Dawley rats each were selected. Group I served as control. Group II rats were permitted free access to solubilised crude extract of green tea (1.5%w/v in water) as the sole drinking fluid. Group III rats were given a single daily oral dose of chlorpyriphos (30 mg/kg bodyweight in corn oil). Group IV rats received oral dose of pesticide and green tea extract simultaneously. All rats were sacrificed after 15 days. Significant damage to liver was observed via increased serum levels of transaminases and alkaline phosphatase. Lipid peroxidation showed a 5-fold increase in pesticide exposed rats compared to control. In contrast, levels of antioxidant GSH, glutathione-dependent enzymes like glutathione peroxidase (GPx), glutathione S-transferase (GST) and free radical scavengers like catalase (CAT) and superoxide dismutase (SOD) were significantly lower than those of the control group reinforcing oxidative damage. The use of green tea extract appeared to be beneficial to rats, although not to a great extent in significantly reducing and reversing the damage sustained by pesticide exposure and favors recovery.



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