Kisspeptin-10

Historical Background

Kisspeptin-10 is the shortest biologically active form of kisspeptin — a family of neuropeptides encoded by the KISS1 gene, named after Hershey, Pennsylvania (the Kisses chocolate brand city) where it was discovered in 1996 as a metastasis suppressor. Its critical role in reproductive physiology was established in 2003 when loss-of-function mutations in the KISS1R receptor were found to cause hypogonadotropic hypogonadism. Kisspeptin is now recognized as the master regulator of GnRH pulsatility — and therefore the entire HPG axis.

What It's Used For

• HPG axis regulation and GnRH pulsatility research
• Hypogonadotropic hypogonadism models
• Fertility and reproductive endocrinology research
• LH surge and ovulation timing studies
• Testosterone stimulation research (males)
• Puberty onset and timing research
• Sexual motivation and behavior studies (KISS1R in limbic system)

Positive Effects

• Potent GnRH secretagogue — stimulates pulsatile GnRH release from hypothalamus
• Triggers LH surge → testosterone production in males / ovulation in females
• Restores LH/FSH pulsatility in hypogonadal animal models
• Acts upstream of GnRH — preserves physiological pulsatility better than direct GnRH agonists
• No receptor desensitization with pulsatile administration (unlike continuous GnRH analogues)
• May stimulate sexual motivation via limbic KISS1R

Potential Side Effects

• Hot flushes (LH surge-mediated vasodilation)
• Transient nausea
• Headache
• Sustained high doses may cause receptor desensitization
• Injection site reactions

Administration

Subcutaneous injection. Pulsatile dosing critical — continuous infusion leads to receptor downregulation. Research protocols use 1–10 nmol/kg IV or subcutaneous bolus. Very short half-life (~28 minutes). Reconstitute with bacteriostatic water; store at 2–8°C.