Kisspeptin-10: KISS1 Decapeptide Research Overview

The KISS1 gene was originally identified as a metastasis suppressor (the gene name derives from Hershey's chocolate Kisses, since it was identified in Hershey, PA). Subsequent research revealed that the gene's protein product is processed to produce kisspeptin peptides of varying lengths, with the C-terminal 10 amino acids representing the minimal active fragment for receptor engagement.^[1]

Kisspeptin signaling at the KISS1R receptor (also called GPR54) was identified in 2003 as a critical upstream regulator of GnRH neurons in the hypothalamus, opening a new field of reproductive endocrinology research. Patients with mutations in KISS1 or KISS1R were found to have hypogonadotropic hypogonadism, establishing the kisspeptin pathway as essential for reproductive axis function.^[2]

Kisspeptin-10 is studied as a research reference compound in preclinical reproductive endocrinology, neuroendocrinology, and GPR54 receptor pharmacology research. It has not been approved by the FDA for any human therapeutic or medical purpose.

Kisspeptin-10 structural features:

• Sequence: Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ (10 residues with C-terminal amidation)

• Source: C-terminal active fragment of the larger KISS1 gene product

• Length: 10 amino acids

• C-terminal amidation: present

• Molecular formula: C₆₃H₈₃N₁₇O₁₄

• Molecular weight: approximately 1,302 Da

Research established that the C-terminal portion of full-length kisspeptins (which can range from 54 to 10 amino acids depending on processing) contains the receptor-engaging residues. Kisspeptin-10 represents the minimal active sequence and is preferred for research applications due to its synthetic accessibility and defined structure.^[3]

Kisspeptin-10 binds the KISS1R receptor (also called GPR54 or hOT7T175).

KISS1R is a class A G-protein-coupled receptor expressed on GnRH neurons in the hypothalamus and in several peripheral tissues. Kisspeptin binding produces Gq-coupled signaling, leading to inositol phosphate accumulation and calcium mobilization in the receiving cells.^[4]

The most-studied biological effect of kisspeptin is on GnRH neurons. KISS1R activation on these neurons stimulates GnRH secretion into the hypophyseal portal blood, which then triggers LH and FSH release from the anterior pituitary.^[5]

Kisspeptin-10 research is concentrated in reproductive endocrinology and neuroendocrinology.

Rodent and primate models examining LH pulsatility have used Kisspeptin-10 as a tool to dissect upstream regulators of the GnRH pulse generator. Serial blood sampling and electrophysiological measurements of GnRH neuron activity are typical endpoints.^[5]

Animal models of puberty onset have examined the role of the kisspeptin system in initiating reproductive maturation. Kisspeptin-10 administration to prepubertal animals has been used to probe the maturation of this signaling pathway.^[6]

Kisspeptin signaling integrates metabolic state information (via leptin signaling) with reproductive function. Research on the metabolic-reproductive crosstalk uses Kisspeptin-10 as a tool for activating the reproductive arm of this signaling network.^[4]

Kisspeptin-10 is a stable decapeptide with C-terminal amidation. Standard peptide handling applies.

Lyophilized material is stored at minus 20 degrees Celsius. Reconstituted solution is used within several weeks at 4 degrees Celsius.

Bacteriostatic water is the standard reconstitution solvent.

HPLC for purity, mass spectrometry for identity confirmation matching the amidated decapeptide mass, and endotoxin screening. Each batch of Instant Peptides Kisspeptin-10 ships with a full Certificate of Analysis.

Instant Peptides supplies Kisspeptin-10 as a synthetic lyophilized reference compound in 10mg vials. Material is supplied to qualified research professionals. Not for human or animal consumption.

View the product page for current pricing and the Certificate of Analysis for the active batch.