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Journal of Clinical Endocrinology & Metabolism, Vol 46, 420-424, Copyright © 1978 by Endocrine Society

ARTICLES

Effect of human chorionic gonadotropin on human thyroid tissue in vitro

J Silverberg, J O'Donnell, A Sugenoya, VV Row and R Volpe

Thyroid stimulating substances other than TSH have been found in certain disease states associated with hyperthyroidism. The thyroid stimulator associated with the thyrotoxicosis of trophoblastic disease is uncertain; however, recent evidence suggests a role for hCG. To explore the thyroid stimulating properties of hCG further, we examined the ability of hCG to displace [1252]TSH from receptors on human thyroid membrane and to generate cyclic-AMP (c-AMP) from human thyroid slices. Human chorionic gonadotropin at a concentration of 40 IU/ml displaced labeled TSH from human thyroid membranes and, at a concentration of 69 IU/ml, hCG caused the generation of c-AMP in thyroid slices. These results suggest that hCG can bind to the TSH receptor on thyroid cells and can stimulate them to produce c-AMP at concentrations of hCG within the range that is found in trophoblastic disease.


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