Kisspeptin-10

Kisspeptin-10 Peptide

Kisspeptin-10 is a synthetic decapeptide fragment derived from the endogenous Kisspeptin family, which are products of the KISS1 gene. This peptide family has been studied for its regulatory role in reproductive endocrinology, particularly in stimulating the release of gonadotropin-releasing hormone (GnRH). Through this pathway, Kisspeptin-10 may influence luteinizing hormone (LH) and follicle-stimulating hormone (FSH) secretion, thereby modulating reproductive hormone activity.

Overview

Research indicates that Kisspeptin-10 may function as a critical upstream regulator of the hypothalamic-pituitary-gonadal (HPG) axis. By binding to the G-protein coupled receptor GPR54 (also known as KISS1R), Kisspeptin-10 is suggested to activate intracellular signaling pathways that trigger the pulsatile release of GnRH. This cascade may subsequently stimulate LH and FSH secretion, processes essential for normal reproductive physiology.

Experimental data suggests Kisspeptin-10 may also influence spermatogenesis and sperm motility through its endocrine signaling role. These findings position Kisspeptin-10 as a peptide of growing interest for reproductive biology research.

Chemical Makeup

• Molecular Formula: C64H78N16O13
  
• Molecular Weight: ~1302.4 g/mol
  
• Sequence: Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH2
  
• Other Known Titles: Metastin (10-amino acid fragment)
• Purity: ≥98%
  

Batch-specific Certificate of Analysis (COA) values confirm a purity of ≥98%, produced via solid-phase peptide synthesis and verified through HPLC and mass spectrometry. Lyophilized powder is supplied in 10mg vials for laboratory use.

Research and Clinical Studies

Kisspeptin-10 and GnRH Regulation

Studies suggest that Kisspeptin-10 directly stimulates GnRH neurons, potentially increasing LH pulse frequency and amplitude. This mechanism is hypothesized to be vital for the initiation of puberty and maintenance of fertility.

Kisspeptin-10 and Sperm Function

Emerging research posits that Kisspeptin-10 may influence spermatozoa physiology, particularly motility and capacitation. Investigators suggest this peptide may act either directly on sperm cells or indirectly through modulation of reproductive hormone levels.

Kisspeptin-10 in Fertility Models

Animal and early human studies have reported that Kisspeptin-10 administration could enhance gonadotropin release and increase testosterone levels, potentially supporting spermatogenesis and fertility-related processes. Further trials are ongoing to clarify its clinical significance.

References

1. Seminara SB, et al. "The GPR54 gene as a regulator of puberty." N Engl J Med. 2003;349(17):1614–1627. https://pubmed.ncbi.nlm.nih.gov/14573733/
   
2. Kotani M, et al. "The metastasis suppressor gene KiSS-1 encodes kisspeptins." Endocrinology. 2001;142(7):294–299. https://pubmed.ncbi.nlm.nih.gov/11416003/
   
3. Han SK, et al. "Activation of gonadotropin-releasing hormone neurons by kisspeptin as a neuroendocrine switch for puberty." J Neurosci. 2005;25(49):11349–11356. https://pubmed.ncbi.nlm.nih.gov/16339030/
   
4. Messager S, et al. "Kisspeptin directly stimulates gonadotropin-releasing hormone release via GPR54." Proc Natl Acad Sci USA. 2005;102(5):1761–1766. https://pubmed.ncbi.nlm.nih.gov/15665093/
   
5. Clarkson J, Herbison AE. "Postnatal development of kisspeptin neurons in mouse hypothalamus." Endocrinology. 2006;147(12):5817–5825. https://pubmed.ncbi.nlm.nih.gov/16959837/
   
6. Shahab M, et al. "Kisspeptin stimulates GnRH release and sexual maturation in monkeys." Nature. 2005;437(7056):69–73. https://pubmed.ncbi.nlm.nih.gov/16136145/
   
7. Jayasena CN, et al. "Kisspeptin-54 triggers egg maturation in women undergoing in vitro fertilization." J Clin Invest. 2014;124(8):3667–3677. https://pubmed.ncbi.nlm.nih.gov/25036700/
   
8. Pinto FM, et al. "Kisspeptins and their GPR54 receptor are expressed in human spermatozoa and may modulate motility." Fertil Steril. 2012;97(5):1213–1217. https://pubmed.ncbi.nlm.nih.gov/22464758/
   
9. Abbara A, et al. "Kisspeptin and reproduction: molecular mechanisms and therapeutic opportunities." Endocr Rev. 2021;42(4):538–576. https://pubmed.ncbi.nlm.nih.gov/33355625/