Effect of thyroid hormones on activity dynamics of enzymes of intestinal mucosa of juvenile roach Rutilus rutilus |
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| Authors: | V. V. Kuz’mina B. A. Levin Lyu Vei P. V. Rusanova |
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| Affiliation: | (1) Department of Zoology, University of Florida, Gainesville, FL 32611, USA;(2) Department of Biology, Boston University, 5 Cummington ST, Boston, MA 02215, USA;(3) Bodega Marine Laboratory, University of California, Davis, CA 94923, USA;(4) Present address: Department of Biology, Western Washington University, Bellingham, WA 98225, USA |
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| Abstract: | The effect of thyroid hormones on activity dynamics of enzymes (proteinases and glycosidases) of intestinal mucosa of juvenile roach Rutilius rutilus was investigated. Application of substances increasing and decreasing the level of thyroid hormones in blood plasma significantly influences the growth rate and the activity of proteinases and glycosidases functioning in the intestinal mucosa. In most cases, the activity level of trypsin-like proteinases and the activity of glycosidases in the fish exposed to triiodothyronine were significantly higher than in the control. The activity level of chymotrypsin-like proteinases in fish form the group with exposure of exogenous triiodothyronine only in the end of the experiment surpassed the values of this parameter in the control fish. In the fish developing at deficiency of thyroid hormones, the growth rate and proteinases activity were significantly lower in comparison with the control. |
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