Abstract
The present research studied the influence of zinc oxide nanoparticles (ZnO-NPs; 5, 7.5, and 10 mg/kg, i.p.) on the liver and kidney injuries motivated by thioacetamide (TAA; 100 mg/kg, i.p.). Each treatment was carried out 3 times per week for 8 weeks. ZnO-NPs relieved the decrease of hepatic or renal reduced glutathione (GSH), catalase (CAT), and superoxide dismutase (SOD) induced by TAA. Moreover, ZnO-NPs lowered tissue malondialdehyde (MDA, an indicator for lipid peroxidation). TAA treatment led to a significant increase in plasma inflammatory markers (TNF-α, IL-6), liver enzymes (gamma-glutamyltransferase (GGT), aspartate aminotransferase (AST), alanine aminotransferase (ALT), and kidney function parameters (creatinine, urea, uric acid). However, these parameters were reduced after treatment with ZnO-NPs. In addition, the hepatic fibrosis markers, hydroxyproline level, and α-smooth muscle actin immunopositive stain were lowered by ZnO-NPs. The protective effect of ZnO-NPs in respect to biochemical changes was also confirmed by histopathological and immunohistochemistry studies in the liver and kidney sections. Our results suggested that ZnO-NPs may attenuate TAA toxicity via suppression of oxidative stress.
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