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- W2296948943 abstract "Pro and antioxidant parameters were compared in the erythrocytes, gill, liver and kidney of Nile Tilapia from a fish farm (Reference group) and from a polluted site at Billings Reservoir (Reservoir group). The erythrocyte oxidative stress was characterized by the increased oxygen uptake and decreased time induction (induced by t-butyl hydroperoxide, t-BHP) evidencing a higher susceptibility to oxidative damage. Moreover, a decrease in both catalase (CAT) activity and total glutathione content (GSH) in erythrocytes of Reservoir fish were observed. The higher gill cytochrome b{sub 5} levels is probably related to the enhanced oxyradical production. This fact associated to the diminished CAT and G6PDH activities establish a gill oxidative stress of Reservoir fish. The liver pro-oxidant parameters were greatly increased in the Reservoir fish. These results together with the increase in SOD activity and decrease in CAT, glutathione reductase (GR) and G6PDH activities indicate a liver oxidative stress condition. The observed increase in kidney NADH cytochrome c reductase and in both P-450 and b{sub 5} contents did not reflect in enhanced oxyradical production. The decrease in GSH observed in this tissue is probably associated to the conjugation reactions for ulterior excretion. These results furnish useful data for prospections of polluted aquaticmore » sites in order to correlate the presence of pollutants to associated biological effects.« less" @default.
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- W2296948943 date "1995-12-31" @default.
- W2296948943 modified "2023-09-27" @default.
- W2296948943 title "Oxidative stress in tissues of Nile Tilapia (Oreochromis niloticus) from a polluted site" @default.
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