KISS1-305

KISS1-305, the Metastin/Kisspeptin analog, is a prototype peptide and a chemical probe. KISS1-305 has suboptimal KISS1R agonistic activity, and resists plasma protease degradation[1].

Research Areas >> Others

Signaling Pathways >> Others >> Others

KISS1-305 (4 nmol/h; s.c.) shows suppression of pituitary-gonadal functions[1]. KISS1-305 causes substantial elevations of plasma LH and testosterone, followed by abrupt reductions of both hormone levels. KISS1-305 also reduced genital organ weight more profoundly than leuprolide. In mechanistic studies, chronic KISS1-305 administration only transiently induced c-Fos expression in GnRH neurons, suggesting that GnRH-neural response was attenuated over time[1]. Animal Model: Adult male Sprague Dawley Crl:CD(SD) rats (8-10 wk of age)[1] Dosage: 4 nmol/h Administration: s.c. Result: Both plasma T and LH levels were markedly increased on d 1 after the initiation of dosing and dramatically decreased thereafter to the lower limit of detection (LH: 0.08 ng/ml; T: 0.04 ng/ml) by d 6. 

[1]. Matsui H, et al.Chronic administration of the metastin/kisspeptin analog KISS1-305 or the investigational agent TAK-448 suppresses hypothalamic pituitary gonadal function and depletes plasma testosterone in adult male rats.Endocrinology. 2012 Nov;153(11):5297-308.