The effect of melatonin on the intensity of free radical processes and activities of superoxide dismutase (SOD, EC 1.15.1.1.) and catalase (EC 1.11.1.6) has been investigated in liver and blood serum of rats with diabetes mellitus type II. The development of diabetes was accompanied by the increase in biochemiluminescence parameters and the enzyme activities studied. Melatonin administration changed the parameters studied towards control values.
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