Stimulation of intestinal secretion of apolipoprotein AI by triiodothyronine |
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Authors: | H G Wilcox P Tso M Heimberg |
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Affiliation: | Department of Pharmacology, University of Tennessee, Memphis 38163. |
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Abstract: | Rats were made hyperthyroid with triiodothyronine in an osmotic minipump implanted intraperitoneally for one week. Intestinal lymph was collected from euthyroid and hyperthyroid rats for 40-55 hours. The rate of apolipoprotein AI (apo AI) secreted into the lymph by hyperthyroid rats exceeded that of euthyroid rats (149 +/- 9 vs 95 +/- 2 micrograms/hr), and was not associated with a proportional increase in the output of triglyceride. The fall in plasma concentration of apoAI in the euthyroid (10 mg/dl) and hyperthyroid (23 mg/dl) could be accounted for by the loss due to diversion of lymph. It appears that the intestine may contribute significantly to the increased plasma levels of apoAI observed in the hyperthyroid rats. |
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