Journal September 16, 2026 5 min read

Kisspeptin-10: mechanism of action

Kisspeptin-10 is the bioactive decapeptide fragment of the KISS1 gene product, acting as an agonist at the KISS1R receptor to stimulate GnRH release. This page summarises the receptor pharmacology and downstream signalli

peptides-pro Editorial

Kisspeptin-10 (KP-10) is the C-terminal decapeptide amide of the KISS1 gene product, also known as metastin 45–54 or kisspeptin-54 (45–54). It is a neuropeptide of the RF-amide family and the minimal sequence required for full agonist activity at the KISS1R receptor (formerly GPR54). The peptide has the sequence YNWNSFGLRF-NH2, a molecular formula of C63H83N17O14, and a molecular weight of approximately 1302.5 Da. In research catalogues it is supplied as a lyophilised powder for laboratory use only.

The work described on this page centres on the KISS1/KISS1R axis, a G protein-coupled receptor pathway that activates phospholipase C and downstream ERK1/2 and PI3K/AKT signalling.

Research Studies

Kisspeptin-10 and gonadotropin secretion in healthy men

In a randomised, single-blinded, placebo-controlled study, 15 healthy men received subcutaneous kisspeptin-10 as an acute dose–response infusion, a continuous 5-day infusion, or daily intermittent administration (8 h on, 16 h off) for 12 days. Chronic intermittent dosing stimulated gonadotropin secretion for the full 12 days, whereas continuous infusion produced a different temporal profile [1].

A separate study in three healthy adult men examined continuous intravenous kisspeptin-10 at 12.5 mcg/kg/h for 24 h. Frequent blood sampling showed dynamic modulation of luteinizing hormone (LH) secretion, with an initial rise followed by a decline, indicating that the human gonadotrope response to sustained KISS1R activation differs from that observed in non-human primates [6].

Kisspeptin-10 and the KISS1R signalling cascade in vitro

Using HEK293 cells expressing the human KISS1R, researchers directly compared the in vitro pharmacological profiles of endogenous agonists hKp10 and hKp54 with the synthetic agonists TAK-448 and C6. The analog C6 elicited greater tachyphylaxis and transcriptional activation than either hKp10 or hKp54, suggesting that ligand-specific differences in receptor desensitisation and downstream gene induction exist within this agonist class [2].

Kisspeptin-10 and extracellular matrix regulation in human cardiac fibroblasts

In cultures of a human cardiac fibroblast cell line, kisspeptin-10 altered the content of glycosaminoglycans and the proteoglycan decorin. Signalling inhibitor experiments indicated that the effect on these extracellular matrix components is mediated through a specific kinase pathway, providing evidence that KISS1R signalling can influence cardiac fibroblast function in vitro [3].

Kisspeptin-10 and neuroendocrine control of puberty in ewes

A study in 24 ewe lambs from single or twin pregnancies measured plasma concentrations of kisspeptin-10, neurokinin B (NKB) and dynorphin A (Dyn A) across puberty. The temporal relationships among these three neuropeptides differed between normal and delayed puberty, and the authors reported correlations linking kisspeptin-10 to the timing of first ovulation [4].

Kisspeptin-10 and metabolic effects in high-fat-fed female mice

In high-fat diet (HFD) fed female mice, twice-daily intraperitoneal administration of kisspeptin-10 at 25 nmol/kg for 21 days decreased body weight, blood glucose and energy intake to levels comparable with normal-diet controls. The treatment also produced diverse effects on ileal enteroendocrine cells and pancreatic islet morphology, and modulated circulating follicle-stimulating hormone (FSH) levels that had been elevated by the HFD [5].

Kisspeptin-10 and placental mTOR signalling in hypothyroid rats

In a rat model of maternal hypothyroidism induced by propylthiouracil, kisspeptin-10 treatment beginning on gestational day 8 restored placental mTOR signalling and improved mediators of glucose homeostasis that had been disrupted by the hypothyroid state. The findings link KISS1R activation to placental nutrient sensing and maternal energy balance in this animal model [8].

Kisspeptin-10 and the KISS1/KISS1R axis in human placentation

A review of the KISS1/KISS1R axis in human placentation summarised molecular mechanisms implicated in trophoblast signalling and discussed the potential of kisspeptin-related biomarkers for early risk stratification in foetal growth restriction and pre-eclampsia. The review is a synthesis of existing literature rather than a primary experimental study [7].

Kisspeptin-10 and KISS1R selectivity: computational insights

Computational modelling has been used to examine the structural basis for kisspeptin-10 selectivity toward KISS1R. The work reports that KP-10, as the bioactive core fragment, can modulate reward-related behaviours in rodent models beyond its canonical reproductive role, and the modelling offers a structural rationale for receptor selectivity [9].

Kisspeptin-10 and reproductive hormone secretion in mice

In mice, kisspeptin-10 has been reported to promote hormone secretion, ovarian follicle development and fecundity via the PI3K/AKT/ERK signalling pathway. The study combined in vivo and in vitro approaches, including cultured follicular granulosa cells, to examine proliferation and autophagy markers [12].

Kisspeptin-10 and ovarian cancer cell lines

In SKOV-3 ovarian cancer cell lines, exogenous kisspeptin-10 was reported to inhibit progression through targeting the SP1–hTERT–ZEB1 regulatory axis. The study used in vitro and computational methods to explore the influence of KP-10 on telomerase reactivation and metastatic potential [11].

Kisspeptin-10 and central precocious puberty diagnostics

A clinical study examined the ratio of kisspeptin-10 to basal LH as a potential surrogate biomarker to differentiate idiopathic central precocious puberty from premature thelarche, a distinction that often requires GnRH stimulation testing. The work measured kisspeptin-10 alongside neurokinin B and neuropeptide Y as regulators of GnRH secretion [10].

If you are reading this for personal health reasons

The materials described here are sold for laboratory research only. We do not provide dosing or medical guidance. Anyone considering a compound for themselves should speak to a licensed clinician.