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Endocrinology, Vol 110, 1828-1830, Copyright © 1982 by Endocrine Society

ARTICLES

Dopamine regulates canine plasma beta-endorphin-immunoreactivity levels

B Sharp, R Ross, E Levin and J Sowers

Intravenous administration of the dopamine antagonists domperidone and metoclopramide elevates canine plasma beta-endorphin immunoreactivity. Pretreatment with dopamine, but not dexamethasone, inhibits this effect. Sephadex G-50 chromatography shows that this response is due to beta-endorphin-like peptides, not beta-lipotropin. These findings indicate that pituitary beta-endorphin secretion is tonically inhibited by dopamine and suggest that the intermediate lobe is the source of this secretion.




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Endocrinology Endocrine Reviews J. Clin. End. & Metab.
Molecular Endocrinology Recent Prog. Horm. Res. All Endocrine Journals
Copyright © 1982 by The Endocrine Society