Efekti deprenila, rezerpina i njihove kombinacije na aktivnost antioksidativnih enzima u mozgu pacova
Effects of depkenyl, resekpine and their combination on the antioxidant enzyme activities in the rat brain
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Antioxidant enzyme activities: superoxide dismutases (CuZn SOD and Mn SOD), catalase (CAT), glutathione peroxidase (GSH-Px), glutathione-S-transferase (GST) and glutathione reductase (GR) were determined in different brain regions: striatum, hippocampus, hypothalamus with thalamus, as well as in the rest of the brain of rats treated subchronically with L-deprenyl, after a single dose of reserpine and in animals subchronically treated with L-deprenyl and then with reserpine. Our results show that reserpine (p < 0.02), as well as, the combination of deprenyl + reserpine (p<0.01) induced a significant decrease in CAT activity in the rest of the brain and a significant decrease in GSH-Px activity in the hypothalamus with thalamus (p<0.05). Deprenyl expressed no significant effect on antioxidant enzyme activities in the examined brain regions. In experimental group treated with deprenyl and then with reserpine a significant decrease of CuZn SOD activity (p<0.05) in the hippocampus, Mn SOD activity (p<0.05) in the striatum and an increase of CnZn SOD activity (p<0.01) in the rest of the brain were observed. Our results support the opinion that depletion of neuronal catecholamine pool (due to the treatment with reserpine) has a direct influence on antioxidant enzyme activities, while deprenyl probably exerts its effects through interaction with some trophic factors.