Kisspeptin 10 mg

Kisspeptin-10 (also spelled kisspeptine in French-language literature) is a 10-amino-acid neuropeptide fragment derived from the larger kisspeptin precursor encoded by the KISS1 gene. It is classified as an endogenous neuropeptide hormone and the minimal biologically active fragment that retains full activity at the kisspeptin receptor (GPR54, also known as KISS1R). Kisspeptin signaling is considered a master upstream regulator of the hypothalamic-pituitary-gonadal (HPG) axis through its action on GnRH-producing neurons.

At the cellular level, Kisspeptin-10 binds GPR54, a G-protein-coupled receptor expressed densely on GnRH neurons of the hypothalamus. Receptor activation triggers Gαq/11-coupled phospholipase-C signaling, leading to intracellular calcium mobilization and downstream depolarization of GnRH neurons. This signaling cascade positions kisspeptin as the principal upstream gatekeeper of GnRH pulse generation, and as a result, of pituitary LH and FSH dynamics in neuroendocrine research models.

Research interest in Kisspeptin-10 centers on neuroendocrine signaling research, HPG axis investigation, and reproductive-biology research models, including pubertal-onset timing, hypothalamic neuron biology, and species-comparative neuroendocrine signaling. Foundational research investigations have reported that experimental kisspeptin administration in laboratory research subjects is associated with elevated luteinizing hormone, follicle-stimulating hormone, and downstream testosterone signaling in males, supporting the kisspeptin system as a central HPG-axis research target (Dhillo et al., 2005, Journal of Clinical Endocrinology and Metabolism).

The peptide is supplied as a lyophilized powder to ensure optimal stability during storage and handling.

The KISS1 gene was originally identified during research into metastasis-suppression biology, and the kisspeptin family of peptides was named for the research location where it was first characterized. The neuroendocrine role of kisspeptin emerged later, when researchers discovered that inactivating mutations in GPR54, the kisspeptin receptor, produced research-model phenotypes of disrupted pubertal development and impaired reproductive-axis signaling. These findings reshaped the field by identifying kisspeptin as an essential upstream signal for HPG-axis activation.

Subsequent research showed that kisspeptin neurons cluster in distinct hypothalamic nuclei and provide direct, dense innervation to GnRH neurons. Kisspeptin-10, the C-terminal decapeptide fragment, retains full receptor activity and has become the standard research peptide for probing the kisspeptin signaling system in cellular and animal-model studies. Its short sequence and full bioactivity make it an ideal tool compound for receptor-pharmacology studies, electrophysiological characterization of GnRH neuron firing, and species-comparative neuroendocrine signaling research.

Today, kisspeptin research extends beyond classical reproductive-axis biology into metabolic-neuroendocrine coupling, stress-axis interaction studies, and developmental neurobiology research models. Kisspeptin-10 remains the most frequently used kisspeptin research tool for in vitro receptor work and animal-model HPG-axis investigations.

1. GPR54 (KISS1R) Receptor Activation

Kisspeptin-10 binds with high affinity to GPR54, a G-protein-coupled receptor expressed densely on GnRH-producing neurons in hypothalamic research models. Receptor activation engages Gαq/11 signaling, leading to phospholipase-C activation, inositol-trisphosphate generation, and intracellular calcium mobilization. This cascade drives depolarization of GnRH neurons and is the proposed molecular basis for kisspeptin's role in HPG-axis investigation.

2. GnRH Neuron Modulation

Within neuroendocrine research models, Kisspeptin-10 is studied as the principal upstream signal that initiates GnRH neuron firing patterns. Electrophysiological investigations report increased firing frequency, calcium-spike activity, and pulse-generator coordination in kisspeptin-exposed GnRH neuron preparations, supporting its role as a central neuroendocrine signaling tool compound.

3. Pituitary Gonadotropin Signaling Research

Through stimulation of GnRH release, Kisspeptin-10 indirectly influences the secretion dynamics of pituitary gonadotropins, including luteinizing hormone and follicle-stimulating hormone. Research-model investigations characterize these downstream signaling effects in animal preparations and in vitro perifusion systems, providing a quantitative framework for studying HPG-axis activation.

4. Neuroendocrine Network Integration

Kisspeptin neurons receive inputs from multiple regulatory pathways, including metabolic, photoperiodic, and stress-related signals. Kisspeptin-10 is therefore studied not only as a direct GPR54 ligand, but also as a research probe for examining how upstream environmental and metabolic signals are integrated within the kisspeptin-GnRH circuit in neuroendocrine signaling research.

Research Applications

Conclusion

Kisspeptin-10 is the minimal bioactive decapeptide fragment of the kisspeptin neuropeptide family and a primary research tool for studying GPR54 signaling and the upstream control of the HPG axis. Through its activation of GnRH-producing neurons and downstream influence on gonadotropin signaling dynamics, it supports a broad range of neuroendocrine signaling research, reproductive-biology research models, and hypothalamic-neuron investigations in controlled laboratory settings.

Research Use Disclaimer

This product is intended for research and laboratory use only. It is designed exclusively for in vitro research purposes. All information provided is for educational and research reference only. This product is not intended for human or animal use. It is not a drug, food, or cosmetic and must not be marketed, labeled, or used as such. Use and handling are restricted to trained and qualified professionals.