Effect of thyroid hormones on activity dynamics of enzymes of intestinal mucosa of juvenile roach <Emphasis Type="Italic">Rutilus rutilus</Emphasis> |
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| Authors: | V V Kuz’mina B A Levin Lyu Vei P V Rusanova |
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| Institution: | (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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