Intensity of peroxidation processes and activity of antioxidant enzymes in rat tissues at high chromium level in the diet

摘要

The data on the influence of chromium in different tissues of rats at its consumption with mixed fodder in the form of CrClsub3/sub×6Hsub2/subO on the intensity of peroxidation processes and activity of antioxidant enzymes are presented. The degree of high chromium content in the studied tissues of rats at its addition to mixed fodder in the amount of 200 μg/kg during 30 days was established. Chromium content in the rat tissues decreased in the order: the spleen, heart, kidneys, lungs, brain, liver, skeletal muscle. In all tissues of rats fed with mixed fodder with chromium addition, except for skeletal muscles, content of lipid peroxidation products – hydroperoxide and TBARS-products decreased. The content of lipid peroxidation products decreased in the spleen, kidneys, liver and lungs. Also in all organs and tissues of rats the activity of glutathione peroxidase, glutathione reductase and catalase increased at the action of chromium. In the brain and kidneys the level of reduced glutathione increased. Superoxide dismutase activity was significantly higher not only in the heart and skeletal muscles of animals and is probably equal in the lungs and liver, and in other organs – the brain, kidneys and spleen in animals of the studied group the enzyme activity was lower as compared to animals of the control group. Obtained results demonstrate the regulatory influence of chromium on free radical process in the rat tissues.