Kisspeptin-10
Neuropeptide hormone
A decapeptide studied in reproductive endocrinology research.
Also referenced as: Kisspeptin
Overview
Kisspeptin-10 is the C-terminal decapeptide of kisspeptin, a neuropeptide encoded by the KISS1 gene. Kisspeptins are endogenous ligands for the KISS1R (GPR54) receptor and are central regulators of reproductive endocrinology.
At a glance
What Kisspeptin-10 does
Kisspeptin is the master upstream trigger of the reproductive (HPG) axis. It is a hypothalamic neuropeptide that acts on the KISS1R receptor (GPR54) expressed on GnRH neurons, and its central role is to switch on GnRH release rather than to act on the pituitary or gonads directly. In research it functions as the gatekeeper that translates metabolic, environmental, and steroid-feedback signals into a GnRH output, which is why loss-of-function mutations in KISS1R cause congenital failure of puberty and why kisspeptin neurons are considered the initiators of the pubertal onset.
Mechanistically, arcuate-nucleus Kiss1 neurons (the so-called KNDy neurons, co-expressing neurokinin B and dynorphin) drive the pulsatile firing of GnRH neurons, setting the frequency of GnRH — and therefore LH — pulses, while a separate rostral kisspeptin population helps generate the pre-ovulatory LH surge in females. Administered kisspeptin binds GnRH-neuron KISS1R, evoking GnRH secretion into the hypophyseal portal blood, which then elicits downstream LH and FSH release from the anterior pituitary.
Human evidence is unusually strong for a peptide of this class: kisspeptin-10 and kisspeptin-54 have been given to healthy men and women and to patients with reproductive disorders in controlled studies, where they reliably raise LH (and, to a lesser degree, FSH) and increase LH pulse frequency. Because it works one step upstream of GnRH, kisspeptin is being investigated as a more physiological tool for probing hypothalamic function and for triggering egg maturation in IVF with a lower risk of ovarian hyperstimulation than conventional triggers.
Effects reported in research
- Stimulates hypothalamic GnRH neurons via the KISS1R (GPR54) receptor, evoking GnRH release into portal blood (human and animal studies).
- Raises circulating LH, and to a lesser extent FSH, when administered to healthy men and women (human clinical studies).
- Increases the frequency of LH pulses, reflecting its role in driving the GnRH pulse generator (human and rodent studies).
- Triggers a testosterone rise in men secondary to the LH increase (human studies).
- Can induce a pre-ovulatory-type LH surge and has been used to trigger oocyte maturation in IVF with lower ovarian-hyperstimulation risk than standard triggers (human trials).
- Restores gonadotropin responses in some patients with hypothalamic reproductive disorders, serving as a diagnostic probe of hypothalamic function (human studies).
- Loss-of-function of its receptor (KISS1R) prevents normal puberty, establishing kisspeptin as an obligatory upstream trigger of the HPG axis (human genetics).
Effects listed reflect findings reported in the research literature — many in animal or in-vitro models. Listing an effect is not a claim of efficacy or a therapeutic indication in humans.
Mechanism of action
Kisspeptin-10 binds the G-protein-coupled receptor KISS1R (GPR54) on hypothalamic GnRH neurons, stimulating the release of gonadotropin-releasing hormone. Downstream, GnRH acts on the pituitary to promote secretion of luteinizing hormone (LH) and follicle-stimulating hormone (FSH), placing kisspeptin at the apex of the hypothalamic-pituitary-gonadal axis. Because it acts upstream of GnRH, it is studied as a physiological modulator of reproductive hormone release.
Mechanistic description reflects published research-literature understanding. Much peptide research is preclinical (in-vitro or animal-model); mechanism in humans may differ and is not established for many compounds.
What it's studied for
Research contexts in which Kisspeptin-10 appears in the literature. Listing a research area is not a claim of efficacy or a therapeutic indication.
Key characteristics
- C-terminal decapeptide fragment of the KISS1 gene product.
- Endogenous agonist at the KISS1R/GPR54 receptor.
- Acts upstream of GnRH to drive LH and FSH release.
- Master regulator of the reproductive HPG axis.
- Investigational; not an approved therapeutic peptide.
Reported research dosing reference only
Educational reference, not dosing guidance. The figures below summarize amounts reported in published research and research-community protocols, provided for educational and research context only. They are not medical advice, not a recommendation, and not instructions for human use. Kisspeptin-10 is a research compound.
Reported research figures only, not dosing guidance for humans. Human research has most often used weight-based IV administration, with subcutaneous routes explored at higher relative doses.
- Human IV bolus (research): approx. 6.4 nmol/kg reported, given as repeated boluses (e.g. every ~90 min) to model pulsatile release
- Human subcutaneous (research): higher relative doses (~3.2-12.8 nmol/kg range reported in surge-induction studies)
Very short (~4 min) IV half-life drives the use of infusion or repeated pulses; single doses are impractical for sustained axis stimulation. Reference figures for research context only.
How it compares
Kisspeptin acts one step upstream of GnRH (stimulating GnRH neurons), whereas gonadorelin/triptorelin act directly on pituitary GnRH receptors and HCG/HMG act at the gonadal level.
Commonly studied alongside
Compounds frequently researched together with Kisspeptin-10 in the literature. Cross-referenced for research context — not a usage or combination recommendation.
Handling & Stability
Lyophilized peptides are stored cold, protected from light, and reconstituted only at the time of intended in-vitro work.
- Avoid repeated freeze-thaw cycles
- Verify supplier lot and Certificate of Analysis
- Follow institutional lab-safety protocols
Analytical & COA Concepts
Reputable research suppliers publish a third-party Certificate of Analysis per batch. Key analytical concepts referenced in COAs include:
Category Context
Kisspeptin-10 sits in the Hormonal & Sexual Health area of the PeptiDex library.
- Entry type: Research compound reference
- Browse the full library →
- Glossary of terms →
Where researchers source Kisspeptin-10
For researchers studying Kisspeptin-10, third-party suppliers such as Practically Natty Peptides offer research-grade material with third-party Certificates of Analysis and US-based shipping.
View research-supplier listing →
Outbound link to a third-party research supplier. Inclusion does not constitute endorsement; all editorial content is developed independently.
Frequently asked questions
What is kisspeptin-10?
Kisspeptin-10 (Kp-10) is the C-terminal decapeptide fragment of the larger kisspeptin-54 protein, the product of the KISS1 gene. It acts on the KISS1R (GPR54) receptor on hypothalamic GnRH neurons and is studied as an upstream trigger of the hypothalamic-pituitary-gonadal (HPG) axis, stimulating GnRH and downstream LH/FSH release.
What is kisspeptin-10 studied for?
In research it is studied as a stimulator of endogenous GnRH secretion and LH pulsatility, and in models of hypothalamic amenorrhea, reproductive endocrinology, and fertility. It has also been investigated in studies of sexual arousal processing. It is a research compound and is not an approved drug for these uses.
How does kisspeptin-10 differ from kisspeptin-54?
Kisspeptin-54 is the full-length 54-amino-acid peptide, while kisspeptin-10 is its shared C-terminal 10-residue active fragment. Both bind KISS1R, but they differ in pharmacokinetics and clearance, which is a key variable in research protocol design.
What does kisspeptin-10's short half-life imply for research design?
Its plasma half-life after IV bolus is only about 4 minutes, so single doses produce brief effects. To sustain an LH response, research protocols use continuous IV infusion or repeated boluses timed to mimic pulsatile GnRH release, rather than one-off administration.
Why is kisspeptin studied alongside GnRH-axis compounds?
Kisspeptin sits upstream of GnRH neurons, so it is used in research to probe HPG-axis integrity from a different node than direct GnRH agonists such as gonadorelin or LH-mimetics such as HCG. Comparing responses helps localize where an axis defect lies.
Answers are educational summaries of research-literature context and do not constitute medical advice. See the Research Library, COA guide, and Storage & Handling guide for more.