Arsenic에 노출된 틸라피아, Oreochromis niloticus의 항산화 효소반응에 미치는 수온의 영향 = Thermal effects on antioxidant enzymes response in Tilapia, Oreochromis niloticus exposed Arsenic

다국어 초록 (Multilingual Abstract)

The effects of waterborne arsenic (As) exposure on antioxidant defense were studied in liver and gills of tilapia, Oreochromis niloticus under thermal stress. Tilapia were exposed to different As concentrations (0, 200 and 400 μg/L) at three water-temperatures (WT; 20, 25 and 30℃) for 10 days. In antioxidant response, glutathione (GSH) levels, glutathione reductase (GR), glutathione peroxidase (GPx) and glutathione S-treansferase (GST) activities were significantly decreased depend on WT in the gills after As exposure. Also, the range of fluctuation in these enzymes activities was most significantly increased at 30℃ in the liver of tilapia exposed to As. The present findings suggest that a simultaneous stress by temperature change and As exposure could accelerate the alteration in antioxidant enzymes activities of tilapia.