The Enzyme Activity In Hepatopancreas Of Carp (cyprinus Carpio) Under Sulfonamides’ Influence

Abstract

Y. N. Kurbatova, V. M. Mykhalskaia, L. V. Malyuga, L. V. Gayova

The results of studies of the effect of different concentrations of sulfonamides in the aquarium water on the activity of enzymes and protein metabolism in the hepatopancreas of carp yearlings were presented. It was found that the sulfanilamide added to the aquarium water at a concentration of 1.10; 3.15 and 6.30 mg / dm3 and 3 had no effect on the total protein content in the fish hepatopancreas during three days of exposure at first, second and third experimental groups compared with the control. It is proved that when the concentration of water in the aquarium sulfanilamide at a dose of 1.10 and 3.15 mg / dm3 in the hepatopancreas urea content compared with the control is not changed, while a dose of 6,30 mg / dm3 it had increased by 4%. Probably, such an increase in urea levels in the hepatopancreas of fish third test group associated with the activation of regulatory mechanisms in the body of carp to maintain a positive nitrogen balance and reduce the toxic effects of ammonia. We also did not reveal significant difference between the indices of glucose concentration in the hepatopancreas of carp experimental groups compared with the control. We founded that the activity of alanine aminotransferase and aspartate aminotransferase in hepatopancreas of carp experimental groups did not differ from controls, suggesting there was no effect of low concentrations of sulfonamides in the water after brief operation of the xenobiotic on the functional state of the hepatopancreas. Conducted experiments did not revealed changes in lipase activity as α-amylase and fish hepatopancreas in first, second and third experimental groups compared with the control. Their activity remained within the normal characteristic of the species and indicates that sulfanilamide virtually had no effect on the intensity of the hydrolytic processes in the intestines of fish. The performed investigations proved that carp yearlings were capable of adapting to minor concentrations of sulfonamides in water, as evidenced by its lack of effect on the total protein content, the concentration of glucose, urea and the activity of several enzymes in the hepatopancreas of fish.

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