Abstract
Carbon tetrachloride (CCl4) has been used extensively to study xenobiotic-induced oxidative liver injury. Catalase (CAT) is a major antioxidant enzyme while aminotriazole (ATZ) is commonly used as a CAT inhibitor. In the present study, the effects of ATZ on CCl4-induced liver injury were investigated. Our experimental data showed that pretreatment with ATZ significantly decreased CCl4-induced elevation of serum aspartate transaminase (AST) and alanine transaminase (ALT) and improved hepatic histopathological abnormality. ATZ dose-dependently inhibited the activity of CAT, but it reduced the content of H2O2 and the levels of malondialdehyde (MDA) in liver tissues. ATZ decreased plasma level of pro-inflammatory cytokines (TNF-α and IL-6) and reduced hepatic levels of myeloperoxidase (MPO). In addition, posttreatment with ATZ also decreased the level of ALT and AST. These data indicated that ATZ effectively alleviated CCl4-induced oxidative liver damage. These findings suggested that ATZ might have potential value in preventing oxidative liver injury.
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