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Protective effect of Mentha piperita against arsenic-induced toxicity in liver of Swiss albino mice.

The protective role of leaves of Mentha piperita Linn (Mint) was studied in adult Swiss albino mice against arsenic-induced hepatopathy. The animals were divided into four groups. Group I: only vehicle (0.9% NaCl) was administered. Group II: the animals received Mentha leaf extract (1 g/kg body weight per day) orally for 30 days. Group III: animals were treated with sodium arsenite (4 mg/kg body weight) intraperitoneally in 0.9% NaCl. Group IV: animals were given Mentha extract for 10 consecutive days prior to sodium arsenite treatment and continuously for 30 days after sodium arsenite treatment. The animals from the above groups were killed at various time-points, and body weight and liver weight were measured. The biochemical estimation of lipid peroxidation (LPO), reduced glutathione (GSH), lactate dehydrogenase (LDH), acid phosphatase (ACP), and alkaline phosphatase (ALP) in liver and serum glutamate oxaloacetate transaminase (SGOT), serum glutamate pyruvate transaminase (SGPT) in serum were done. In the arsenic-treated group there was a significant increase in ACP, ALP, SGOT, SGPT and LPO content, whereas a significant decrease was recorded in body weight, liver weight, GSH and LDH activity in liver. Pre- and post-treatment of Mentha with arsenic significantly alters the biochemical parameters in liver. A significant decline in ACP, ALP, SGOT, SGPT and LPO content was observed. However, a significant increase in body weight, liver weight, GSH content and LDH activity in liver was estimated. The results indicate that the Mentha extract may be useful in reducing the side effects of arsenic-induced hepatopathy.