Tag Archives: hydroperoxides
Intensity of peroxidation processes and activity of antioxidant enzymes in rat tissues at high chromium level in the diet
R. Ya. Iskra, V. G. Yanovych
Institute of Animal Biology, National Academy of Agrarian Sciences, Lviv, Ukraine;
e-mail: ruslana_iskra@inenbiol.com.ua
The data on the influence of chromium in different tissues of rats at its consumption with mixed fodder in the form of CrCl3×6H2O 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.
Activity of the glutathione system of antioxidant defense in rats under the action of L-glutamic acid
N. O. Salyha
Institute of Animal Biology, National Academy of Agrarian Sciences of Ukraine, Lviv, Ukraine;
e-mail: ynosyt@yahoo.com
The data on the effects of glutamic acid (L-Glu), which is one of three amino acid – precursors of glutathione on animals organism is quite controversial because research in this area remain relevant. The aim of our research was to find out what impact the additional introduction of L-Glu on the activity glutathione system of antioxidant defence and the content of lipid peroxidation products in various organs and tissues of rats. The effect of additional (285 and 715 mg/kg, respectively) introduction to the diet of L-Glu on the activity of antioxidant enzymes and intensity of peroxidation processes in various tissues of rats was studied. It is shown that in the liver, spleen and kidneys of rats which received additional 715 mg/kg of L-Glu content of reduced glutathione and glutathione peroxidase activity increased. A decrease of the content of lipid hydroperoxides and TBA-active products in tissues of animals which received additional 285 and 715 mg/kg of L-Glu into the diet was found. We have also found that the enrichment of rat’s diet by L-Glu during 30 days resulted in a change of glutathione part of antioxidant system and intensity of lipid peroxidation. More intensive changes in these indices were observed in animals which received additional 715 mg/kg of L-Glu into the diet.