alexa Effect of methomyl on hepatic mixed function oxidases in rats.
Pharmaceutical Sciences

Pharmaceutical Sciences

Journal of Bioequivalence & Bioavailability

Author(s): Patil JA, Patil AJ, Sontakke AV, Govindwar SP

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Abstract OBJECTIVE: To study the effect of the methomyl on mixed function oxidase system in rats. MATERIALS AND METHODS: The effect of the methomyl on mixed function oxidase was studied using different dosages, durations and sex. Microsomes were isolated using the calcium precipitation method. The levels of cytochrome P(450) , and cytochrome b(5) were determined using extinction coefficient of 91 and 85 mM(-1) respectively. The activities of drug metabolizing enzymes, hemoglobin content, liver function enzymes, and serum cholinesterase activity were assayed by using standard methods. RESULTS: Intraperitoneal administration of methomyl (4 mg/kg body weight) showed significant decrease in the level of cytochrome P(450) , and the activities of aminopyrine N-demethylase and aniline hydroxylase on the third day of the treatment. Methomyl (4 mg/kg) treatment of old male rat and adult female rat also showed a decrease in the level of cytochrome P(450) , and aminopyrine N-demethylase activity. The serum samples from methomyl treated rats (male and female), when analyzed for alanine aminotransferase (SGPT) and aspartate aminotransferase (SGOT) as markers of the liver toxicity, showed significant increase in the activity. The activities of SGPT and SGOT were significantly higher in the treated rats (2 and 4 mg/kg) than in the control group. A significant decrease in the level of hemoglobin and serum cholinesterase activity was observed, when there was an increase in the dose level. A significant increase was observed in alkaline phosphatase activity at all dose levels. CONCLUSION: Methomyl influences mixed function oxidase and creates abnormality of liver functions in the rats. This effect depends on the dose and duration of methomyl.
This article was published in Indian J Pharmacol and referenced in Journal of Bioequivalence & Bioavailability

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