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Kisspeptin-10: The Gateway to the Reproductive Cascade
Kisspeptin-10: The Gateway to the Reproductive Cascade
Last updated June 2026 · Clean Reference Format
Summary
Kisspeptin-10 is a decapeptide (Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe) cleaved from the KISS1 gene product. It binds GPR54 (Kiss1R), a Gq/11-protein-coupled receptor expressed on GnRH neurons in the hypothalamus. It is the most upstream obligate activator of the HPG axis: GPR54 activation triggers GnRH release → LH/FSH cascade → gonadal steroidogenesis. Genetic loss-of-function mutations in GPR54 cause idiopathic hypogonadotropic hypogonadism, confirming its role as a required gateway to reproductive function.
Mechanism
Kisspeptin-10 binds GPR54 on hypothalamic GnRH neurons (arcuate nucleus, AVPV) → Gq/11 protein coupling → phospholipase C activation → intracellular calcium mobilization → GnRH neuron firing → GnRH release into the portal circulation → anterior pituitary gonadotroph activation → LH and FSH secretion into systemic circulation → gonadal steroidogenesis and gametogenesis.
Key Data
- Kisspeptin-10 is the minimal bioactive fragment — all kisspeptin species (KP-54, KP-14, KP-13) share its C-terminal decapeptide sequence.
- Inactivating GPR54 mutations identified in IHH patients by de Roux et al. (2003, PNAS) and Seminara et al. (2003, NEJM) — genetic proof of obligate HPG axis requirement.
- Exogenous kisspeptin-10 administration triggers immediate LH release in multiple species, confirming functional GPR54 signaling to GnRH neurons.
- Kisspeptin neurons integrate metabolic signals (leptin, insulin), linking energy balance to reproductive axis function.
Kisspeptin-10 vs. Kisspeptin-54
| Parameter | Kisspeptin-10 | Kisspeptin-54 |
|---|---|---|
| Length | 10 aa | 54 aa |
| Receptor | GPR54 (full potency) | GPR54 (full potency) |
| Half-life | Shorter (rapid clearance) | Longer (larger molecule) |
| Research use | Acute pulse/chase studies | Sustained engagement studies |
Access Kisspeptin-10 for Research
≥99% purity · HPLC/MS verified · Available for qualified research applications.
All content for research and educational purposes only. Kisspeptin-10 is not approved for human consumption. Choice Peptide Labs supplies peptides for in vitro research only. Comply with all applicable regulations.
