title: Synthetic peptide with inhibin-like activity preferentially inhibits follitropin secretion in comparison with lutropin-releasing hormone antagonists.
abstract: Biological activity of a synthetic peptide with inhibin-like activity under in vitro and in vivo conditions was compared with three highly potent synthetic lutropin-releasing hormone antagonists. Unlike the synthetic lutropin-releasing hormone antagonists, which effectively inhibited both lutropin and follitropin secretion from the pituitary, the inhibin-like peptide showed a preferential effect by inhibiting follitropin release both in vitro and in vivo. Thus, small peptides such as inhibin-like peptide with a sequence unrelated to lutropin-releasing hormone may provide a basis for design of selective inhibitors of gonadotropin release.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D005640:Follicle Stimulating Hormone / Q000037:antagonists & inhibitors / Q000378:metabolism*; D007987:Gonadotropin-Releasing Hormone / Q000037:antagonists & inhibitors* / Q000494:pharmacology; D066298:In Vitro Techniques; D007265:Inhibins / Q000138:chemical synthesis / Q000494:pharmacology*; D007700:Kinetics; D007986:Luteinizing Hormone / Q000037:antagonists & inhibitors / Q000378:metabolism*; D008297:Male; D051379:Mice; D010455:Peptides / Q000138:chemical synthesis / Q000494:pharmacology*; D010902:Pituitary Gland / Q000187:drug effects / Q000378:metabolism*; D051381:Rats; D013329:Structure-Activity Relationship
chemical_list: D010455:Peptides; D007987:Gonadotropin-Releasing Hormone; D007265:Inhibins; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone