title: D-Trp6-luteinizing hormone-releasing hormone inhibits sulpiride-induced hyperprolactinemia in normal men.
abstract: The effect of a potent agonistic analog of LHRH, D-Trp6-LHRH, on hyperprolactinemia induced by sulpiride was studied in normal men. Six men received sulpiride (100 mg, twice daily, orally) for 44 days. D-Trp6-LHRH was given sc during the last 2 weeks of sulpiride administration; the dose was 500 micrograms on the first day and 100 micrograms daily for the subsequent 14 days. All men had high serum PRL levels before D-Trp6-LHRH administration (mean +/- SEM, 56 +/- 9 ng/mL), which decreased significantly after the first dose of the analog (45 +/- 5 ng/mL; P = 0.031) and also after 15 days of analog administration (41 +/- 6 ng/mL; P = 0.016). These data demonstrate that administration of LHRH agonist can inhibit the hyperprolactinemic effect of sulpiride, suggesting a direct action of the analog on the pituitary gland to modulate PRL secretion.
mesh_terms: D005640:Follicle Stimulating Hormone / Q000097:blood; D007987:Gonadotropin-Releasing Hormone / Q000031:analogs & derivatives* / Q000494:pharmacology; D006801:Humans; D006966:Hyperprolactinemia / Q000097:blood* / Q000139:chemically induced / Q000517:prevention & control; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D013469:Sulpiride / Q000037:antagonists & inhibitors*; D017329:Triptorelin Pamoate
chemical_list: D017329:Triptorelin Pamoate; D007987:Gonadotropin-Releasing Hormone; D013469:Sulpiride; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone