Seyedeh Azam Hosseini - Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran.
Ahmad Ahmadipour - Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran.
Motahareh Soltani - Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran.
Mohammad Mehdipour - Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran.
Ali Mandegary - Department of Pharmacology & Toxicology, School of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran.
Somayyeh Karami-Mohajeri - Department of Pharmacology & Toxicology, School of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran.

Background: Malathion (MT), an organophosphorus pesticide, induces hepatotoxicity and is associated with hyperglycemia and the development of diabetes mellitus.  Objectives: This study was aimed to evaluate the effects of sub-acute exposure to sub-lethal dose of MT in the liver of diabetic rats.  Methods: Non-diabetic and streptozotocin-induced diabetic rats received MT at a dose of ۱۵۰ mg/kg/day orally. After ۲۸ days, fasting blood glucose, Glucose Tolerance Test (GTT), serum aminotransferases, and liver histopathology and antioxidant status were examined.  Results: MT impaired GTT, caused alteration in histopathology of histopathology and antioxidant status of liver in non-diabetic rats. Impairment in GTT did not observe in diabetic rats exposed to MT, but histopathology changes and antioxidant status alteration was more severe. Conclusion: Repeated sub-lethal dose of MT exacerbated hepatotoxicity in diabetes condition through further impairment in the antioxidant defense system.

Organophosphorus, Diabetes, Liver, Oxidative stress