help button home button Endocrine Society JCEM
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
This Article
Right arrow Submit a related Letter to the Editor
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow Request Copyright Permission
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Rojdmark, S.
Right arrow Articles by Andersson, D. E.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Rojdmark, S.
Right arrow Articles by Andersson, D. E.

Journal of Clinical Endocrinology & Metabolism, Vol 54, 998-1001, Copyright © 1982 by Endocrine Society

ARTICLES

Influence of metoclopramide on calcium inhibition of thyrotropin response to thyrotropin-releasing hormone

S Rojdmark and DE Andersson

To investigate whether exogenous hypercalcemia influences the release of TSH from the anterior pituitary, 25 microgram TRH were injected iv in six healthy subjects who were pretreated orally with either 10 mg metoclopramide or placebo and infused iv with either calcium or saline. Under normocalcemic conditions, TRH raised the serum TSH level from 1.1 +/- 0.1 to 8.0 +/- 3.3 microU/ml (P less than 0.01). Exogenous hypercalcemia reduced this TSH response to TRH by 37 +/- 11% (P less than 0.02). Although metoclopramide was without effect on basal TSH release in an additional five healthy subjects and also left TRH- stimulated TSH release unaffected under normocalcemic conditions, oral pretreatment with the drug counteracted the inhibitory effect of hypercalcemia and restored a normal TSH response to TRH in hypercalcemic subjects. These results indicate that exogenous hypercalcemia may potentiate dopaminergic TSH inhibition in normal individuals.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Endocrinology Endocrine Reviews J. Clin. End. & Metab.
Molecular Endocrinology Recent Prog. Horm. Res. All Endocrine Journals
Copyright © 1982 by The Endocrine Society