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Turkish Journal of Fisheries and Aquatic Sciences 2014, Vol 14, Num, 3     (Pages: 643-650)

Response of Acetylcholinesterase (AChE) in the Erythrocyte and Liver of Rainbow Trout Exposed to Carbosulfan

Erol Capkin 1 ,Halis Boran 2 ,Ilhan Altinok 1

1 Karadeniz Technical University, Faculty of Marine Science, Department of Marine Sciences and Technology Engineering, Surmene, Trabzon, Turkey
2 Recep Tayyip Erdoğan University, Department of Fisheries and Aquatic Sciences, Rize, Turkey
DOI : 10.4194/1303-2712-v14_3_06 Viewed : 4734 - Downloaded : 4878 Present study was conducted to determine the effects of long term carbosulfan exposure on erythrocyte and liver acetylcholinesterase (AChE) activity in rainbow trout (Oncorhynchus mykiss), and to assess sensitive tissue to carbosulfan in terms of AChE activity. For these purpose, fish were allowed to recover in toxicant-free water for 24 days after 60 days of exposure. AChE activity was determined spectrophotometrically using acetylthiocholine iodide as substrate in the erythrocyte and liver. Erythrocyte and liver AChE of carbosulfan-exposed fish showed considerable inhibition rate. A higher degree of enzyme inhibition was observed in the erythrocyte when compared with liver. The degree of enzyme inhibition had a positive correlation with the time of exposure. Erythrocyte and liver AChE activities were recovered after 18 d and 21 d, respectively. Results indicate that the erythrocyte AChE activity is more sensitive to carbosulfan exposure than that of liver AChE. The greater sensitivity of the erythrocyte AChE suggests that it may be more useful as a biomarker of carbosulfan exposure or contamination. Keywords : Enzyme activity, biomarker, pesticide, liver protein, Oncorhynchus mykiss