gnrh i

GnRH-I is a small 10 amino acid long peptide (decapeptide) from the hypothalamus,It is also known as luteinizing hormone releasing hormone (LHRH), is a key molecule in the regulation of reproduction in vertebrates. GnRH, a decapeptide, is produced by neur

GnRH-I acetate in release of biologically active Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH) in the blood.

GnRH III, an evolutionarily conserved member of the GnRH family, can stimulate the secretion of gonadotropins, it stimulates the secretion of both luteinizing and follicle-stimulating hormones.

LGnRH-III, lamprey acetate is an evolutionarily conserved member of the GnRH family, can stimulate the secretion of gonadotropins, it stimulates the secretion of both luteinizing and follicle-stimulating hormones.

Triptorelin ([DTrp6]-LH-RH) is an analog of gonadotropin-releasing hormone (GnRH) and a high-affinity GnRH receptor agonist that stimulates the secretion of luteinizing hormone (LH) and follicle-stimulating hormone (FSH).

NBI-42902 is a potent inhibitor of peptide radioligand binding to the human GnRH receptor (K(i) = 0.56 nm). Tritiated NBI-42902 binds with high affinity (K(d) = 0.19 nm) to a single class of binding sites and can be displaced by a range of peptide and nonpeptide GnRH receptor ligands. In vitro experiments demonstrate that NBI-42902 is a potent functional, competitive antagonist of GnRH stimulated IP accumulation, Ca(2+) flux, and ERK1/2 activation. It did not stimulate histamine release from rat peritoneal mast cells. Finally, it is effective in lowering serum LH in castrated male macaques after oral administration. Overall, these data provide a benchmark of pharmacological characteristics required for a nonpeptide GnRH antagonist to effectively suppress gonadotropins in humans and suggest that NBI-42902 may have clinical utility as an oral agent for suppression of the hypothalamic-pituitary-gonadal axis. (source: Endocrinology. 2007 Feb;148(2):857-67. Epub 2006 Nov 9.)