RESUMO
Seven groups of each of male Fischer 344 rats and B6C3F1 mice were provided with drinking water containing distilled water 0.05 g/L trichloroacetate [TCA], 0.5 g/L TCA, 1.0 g/L TCA, 4.5 g/L TCA; distilled water + vitamin E and 4.5 g/L TCA + vitamin E, respectively, for 30 days. Liver palmitoyl Co-A oxidase [PCOA] and glycolate oxidase were estimated as peroxisomal enzymes. In addition, the liver content of water-soluble antioxidants, antioxidant enzymes and alpha- tocopherol were measured. These results demonstrated that the mouse is more sensitive than the rat with respect to the enhancement of liver peroxisome proliferation by TCA. A condition of oxidative stress produced by TCA exposure in drinking water was conducted. The possible role of oxidative damage in the hepatic carcinogenicity of TCA may be involved