The Effects of Opiate Agonist and Antagonist on Serum Prolactin in Primates: Possible Role for Endorphins in Prolactin Regulation*
- 1 July 1979
- journal article
- research article
- Published by The Endocrine Society in Endocrinology
- Vol. 105 (1), 284-289
- https://doi.org/10.1210/endo-105-1-284
Abstract
Intravenous administration of the opiate receptor antagonist naloxone produced a significant reduction in basal serum PRL concentrations in four male Macaca arctoides. Significant decreases from basal levels were found 15, 30, 45, 60, 90, 120, 150, and 180 min after the iv injection of 0.05 and 0.25 mg/kg naloxone. The iv administration of 0.4 mg/kg morphine produced rapid and significant increases in PRL levels, while 0.04 mg/kg morphine or saline produced no change. Both the dopamine receptor-stimulating agent apomorphine (0.15 mg/kg) and naloxone (0.25 mg/kg) decreased basal serum PRL and blocked the morphine-induced increases in serum PRL. These data support the hypothesis that endorphins are involved in the stimulation of PRL secretion.Keywords
This publication has 12 references indexed in Scilit:
- Enkephalin analogues and naloxone modulate the release of growth hormone and prolactin - evidence for regulation by an endogenous opioid peptide in brainLife Sciences, 1977
- The effect of methionine-enkephalin and D-alanine methionine-enkephalinamide on the concentration of dopamine metabolites in rat striatumEuropean Journal of Pharmacology, 1977
- Effects of naloxone, morphine and methionine enkephalin on serum prolactin, luteinizing hormone, follicle stimulating hormone, thyroid stimulating hormone and growth hormoneLife Sciences, 1977
- Catecholamine receptors on locus coeruleus neurons: Pharmacological characterizationEuropean Journal of Pharmacology, 1977
- Leu-enkephalin-stimulated growth hormone and prolactin release in the rat: comparison with the effect of morphineLife Sciences, 1977
- Iontophoretic application of opiates to the locus coeruleusBrain Research, 1977
- STIMULATION IN VIVO OF THE SECRETION OF PROLACTIN AND GROWTH HORMONE BY β-ENDORPHINEndocrinology, 1977
- Opioid Peptides Endorphins in Pituitary and BrainScience, 1976
- Enkephalin-stimulated prolactin releaseLife Sciences, 1976
- MULTIFACTORIAL REGULATION OF PROLACTIN SECRETIONThe Lancet, 1976