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Endocrinology, Vol 108, 1987-1988, Copyright © 1981 by Endocrine Society

ARTICLES

Calcium depletion stimulates thyroxine release from the thyroid

ML Maayan, EM Volpert and A From

Excised mouse thyroids incubated in Ca++-free medium were stimulated to release increased amounts of stable thyroxine. This stimulation of thyroxine release by incubated thyroid tissue was not additive with TSH or (Bu)2cAMP. It was reversed by norepinephrine through an alpha adrenergic receptor, similar to TSH or (Bu)2cAMP stimulation. Depletion of Ca++ did not result, however, in an increase in the concentration of cAMP in incubated thyroid glands, suggesting that its locus of action was subsequent to TSH stimulation or cAMP production.




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Endocrinology Endocrine Reviews J. Clin. End. & Metab.
Molecular Endocrinology Recent Prog. Horm. Res. All Endocrine Journals
Copyright © 1981 by The Endocrine Society