We studied the dynamics of activity of antioxidant enzymes under conditions of experimental urate kidney damage in rats. Combined administration of uric (0.145 g) and oxonium (0.3 g) acids to laboratory animals modulated free radical oxidation in the kidneys, and especially, in the blood. During the week 1, activity of free radical processes decreased, which was probably determined by the antioxidant effect of increasing blood concentration of uric acid. After 2-3 weeks of experimental pathology, the development of oxidative stress was observed, probably due to predominance of prooxidant activity of uric acid.
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