One of the ultimate manifestations of Cadmium's toxic effects is the depletion of the animal's antioxidant protection system. The article presents data on the effect of cadmium chloride at a dose of 0.04 mg/kg body weight on the activity of enzymes of the glutathione system of antioxidant protection of the body of young cattle. The surveys were conducted on the basis of farm Ivanivtsi of Zhydachiv district of Lviv region on 10 bulls of six months old, Ukrainian black-ruffed dairy breed, which were formed into 2 groups of 5 animals each: control and experimental. Bulls of the experimental group were fed with feed cadmium chloride at a dose of 0.04 mg/kg body weight of the animal. For research, the rules were compulsory for performing zootechnical experiments on the selection and retention of analogues in groups, technology for the procurement, use and accounting of feed consumed. The diet of the animals was balanced by the nutrients and minerals that provided for their need for essential nutrients. The results of studies indicate that Cadmium significantly affects the metabolism processes in liver cells, and thus stimulates lipid peroxidation processes and inhibits the activity of enzymes of the glutathione link of the antioxidant system. The lowest activity of the enzyme link of the glutathione system of antioxidant protection of the body of cattle was found on the twentieth day of the experiment, where, accordingly, the activity of glutathione peroxidase in the serum of bugs of the experimental group decreased by 22.6%, the activity of glutathione 6 phosphate dehydrogenase – by 24.3% relative to the control group of animals. The inhibition of the activity of enzymes of the glutathione system of the organism of bulls of the experimental group is caused by the development of oxidative stress caused by the feeding of Cadmium. The researches made it possible to reveal more deeply the pathogenesis of the toxic effect of cadmium on the body of bugs and use these data in the development of an antidote for cadmium intoxication.
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