Effect of endothelin-1 in man--impact on basal and stimulated concentrations of luteinizing hormone, follicle-stimulating hormone, thyrotropin, growth hormone, corticotropin, and prolactin.
The effect of endothelin-1 on basal and stimulated serum (plasma) concentrations of luteinizing hormone (LH), follicle-stimulating hormone (FSH), thyrotropin (TSH), prolactin (PRL), growth hormone (GH), and corticotropin was investigated in healthy male volunteers (n = 5). Intravenous (IV) administration of endothelin-1 (5 ng/kg/min for 15 minutes, followed by 2.5 ng/kg/min for 105 minutes) induced an increase in basal plasma concentrations of corticotropin. Serum concentrations of PRL, TSH, LH, FSH, and GH remained unchanged. The increase in serum concentrations of these pituitary hormones induced by IV administration of LH-releasing hormone ([LH-RH] 100 micrograms), thyrotropin RH ([TRH] 400 micrograms), GH-RH (100 micrograms), and corticotropin-releasing factor ([CRF] 100 micrograms) was suppressed in regard to PRL (P < .01) and GH (P < .01) and enhanced in regard to corticotropin (P < .01). Stimulated serum concentrations of LH and FSH also tended to be higher following administration of endothelin-1 (P < .05), whereas the increase in serum concentrations of TSH remained unchanged. Thus, when administered in pharmacological doses, endothelin-1 influences pituitary hormone secretion in man.
Vierhapper
H
H
Division of Endocrinology and Metabolism, University Clinic for Internal Medicine III, Wien, Austria.
Hollenstein
U
U
Roden
M
M
Nowotny
P
P
D000324:Adrenocorticotropic Hormone / Q000097:blood; D000328:Adult; D001794:Blood Pressure / Q000187:drug effects; D016232:Endothelins / Q000494:pharmacology*; D005640:Follicle Stimulating Hormone / Q000097:blood; D013006:Growth Hormone / Q000097:blood; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D010907:Pituitary Hormones / Q000097:blood*; D011388:Prolactin / Q000097:blood; D013972:Thyrotropin / Q000097:blood
D016232:Endothelins; D010907:Pituitary Hormones; D000324:Adrenocorticotropic Hormone; D011388:Prolactin; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D013972:Thyrotropin; D013006:Growth Hormone