Strain-Related Differences on Response of Liver and Kidney Antioxidant Defense System in Two Rat Strains Following Diazinon Exposure

Abstract

Background: Diazinon (DZN) is one of the most organophosphates that widely used in agriculture and ectoparasiticide formula- tions. Its extensive use as an eective pesticide was associated with the environmental deleterious eects on biological systems. Objectives: The aim of this study was to investigate the potency of DZN to aect serum biochemical parameters and the antioxidant defense system in the liver and kidney of two rat strains. Materials and Methods: In this experimental study, 30 female Wistar and 30 female Norway rats were randomly divided into con- trol and DZN groups. DZN group was divided into four subgroups: 25, 50, 100 and 200 mg/kg of DZN administered groups by i.p. injection. The parameters were evaluated after 24 hours. Results: At higher doses of DZN, superoxide dismutase, catalase, glutathione S-transferase and lactate dehydrogenase activities and glutathione (GSH) and malondialdehyde levels in liver and kidney of Wistar rats were higher than Norway rats. At these concentra- tions, DZN increased some serum biochemical indices such as liver enzymes activities and levels of urea, uric acid and creatinine in Wistar rat. Conclusions: DZN at higher doses alters the oxidant-antioxidant balance in liver and kidney of both rat strains and induces oxida- tive stress, which is associated with a depletion of GSH and increased lipid peroxidation. However, Wistar rats are found to be more sensitive to the toxicity of DZN compared to Norway rats. In addition, the eect of DZN on liver antioxidant system was more than