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Kisspeptin-10

Kisspeptin-10

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Kisspeptin acts to control hormone secretion as it relates to reproduction. Kisspeptin can influence testosterone levels and sex-related behaviors like drive and motivation. Research also suggests it may help to reverse some of the effects of aging.

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Product Usage: This PRODUCT IS INTENDED AS A RESEARCH CHEMICAL ONLY. This designation allows the use of research chemicals strictly for in vitro testing and laboratory experimentation only. All product information available on this website is for educational purposes only. Bodily introduction of any kind into humans or animals is strictly forbidden by law. This product should only be handled by licensed, qualified professionals. This product is not a drug, food, or cosmetic and may not be misbranded, misused or mislabled as a drug, food or cosmetic.

What is Kisspeptin-10?

Kisspeptin (a.k.a. metastin) is a naturally occurring protein in humans that plays important roles in hormone signaling during puberty and reproduction. It is also thought to alter mood and behavior, promote angiogenesis, and regulate kidney function. The peptide has also been found in the brain and is known to suppress tumor growth and metastasis (spread). The peptide is of greatest scientific interest for its ability to influence gonadotropin releasing hormone (GnRH).

Kisspeptin-10 Structure

Sequence: YNWNSFGLRF
Molecular Formula: C63H83N17O14
Molecular Weight: 1302.4 g/mol
PubChem CID: 25240297
Synonyms: KISS-1, Protein KISS-1, metastin, Kp-10 peptide

Structure

Source: PubChem

Kisspeptin-10 Research

Boosting Gonadotropin-Releasing Hormone

Gonadotropin-releasing hormone (GnRH) is synthesized in and released from GnRH neurons in the hypothalamus. It is the first hormone released in the hypothalamic-pituitary-gonadal axis and controls the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the anterior pituitary gland.  GnRH is the primary driver of puberty and controls the maturation of gametes in the genitals. It is used therapeutically to control menstruation in select settings, as a treatment for precocious puberty, and as a continuous infusion in certain types of cancer.

Increasing Testosterone

By affecting circulating levels of LH and FSH, kisspeptin can alter testosterone levels. This alteration, however, appears to be sex specific. In men, kisspeptin increases testosterone levels while in women it has no discernible impact on testosterone. In one study, 6 men were administered a derivative of kisspeptin via IV. They showed a significant increase in plasma testosterone levels (nearly 3-fold) after just 90 minutes[1]. A different analog of kisspeptin has been found to alter the pulse frequency of LH in men, suggesting that kisspeptin helps to fine tune the normal pulsatile release of sex hormones. A study of healthy men given kisspeptin-10 revealed a rapid and dose-dependent increase in serum LH levels and a concomitant increase in testosterone levels. Kisspeptin-10 appears to achieve this feat by increasing the pulsatile release of LH. If given at high enough doses, kisspeptin-10 causes such rapid pulsation as to obscure individual pulses entirely, resulting in continuous LH release[2]. This finding opens the door for potential uses of kisspeptin and its analogues in a variety of settings from pregnancy to low testosterone levels and more.

Energy Balance

Kisspeptin neurons have long been known to be sensitive to the energy status of an individual. Both under-nutrition and severe over-nutrition can blunt the action of kisspeptin neurons in stimulating GnRH release. In fact, drastic changes in energy balance can lead to infertility in both men and women, a process that appears to be mediated by kisspeptin.

So it is well understood that kisspeptin production and release is sensitive to energy balance. What is becoming clearer, however, is that kisspeptin may itself regulate energy balance. This finding arose through the observation of mice in which the kisspeptin receptor (Kiss1r) was removed via genetic manipulation. These mice showed increased adiposity and reduced energy expenditure. It turns out that the kisspeptin receptor is found in adipose (fat) tissue and brown adipose tissue[3]. It should not come as a surprise that kisspeptin plays a role in energy balance as energy status and reproductive fitness have always been tightly linked. It seems that kisspeptin may be one link that helps to explain the neurochemical control that leads to energy modulating behavior in relation to reproduction.

Cancer Research

Twenty years ago, it was discovered that kisspeptin is capable of suppressing metastasis of melanoma (malignant skin cancer) by as much as 95%. It appears that the peptide produces this effect by reducing cancer cell migration. There is also some question as to whether kisspeptin can reduce cell adhesion and thereby prevent cancer cells from sticking to other tissues and invading them. Screening of a variety of metastatic cancer types reveals that breast, bladder, GI, prostate, pancreatic, ovarian, skin, and thyroid cancers all show changes (generally decreases) in kisspeptin levels, confirming that the peptide plays a role in the spread of cancer[4].

Source: ScienceDirect

The interest in kisspeptin for the treatment of cancer has waxed and waned as a result of the incredible complexity of this peptide. Research is ongoing to understand exactly how the peptide can be manipulated, cut, recombined, and altered to produce effects in various cancer types. It is not so much that the peptide doesn’t work but rather than kisspeptin has so many effects that teasing out its precise impact on various cancer cells is difficult[5]. Dr. Floriana Morgillo implores researchers to take on the complexities of kisspeptin to realize the tremendous potential of this peptide to treat cancer. As she points out, kisspeptin could block metastasis in multiple organs and drastically reduce disease burden, adding years to lifespan of cancer patients and making it easier for current treatments to induce remission.

An interesting connection between kisspeptin, melatonin, and cancer was discovered only in the early months of 2020 when an experiment linked levels of the peptides to exposure to daylight. In the experiment, mice exposed to daylight and darkness showed drastically different levels of melatonin and kisspeptin. Those exposed to daylight had high kisspeptin levels and low melatonin levels. The opposite was true of those kept in the dark. To add to the experiment’s value, the mice were injected with melanoma cells. It turns out that the daylight mice had high tumor growth rates and tumor volume. No measure was made of metastasis. It appears that melatonin and kisspeptin are both involved in tumor suppression such that one influences the other, but the exact connection remains unknown[6]. This is just one example of the complex ways in which kisspeptin interacts with the body to alter tumor growth.

Studied Memory Enhancement

It appears that certain analogs to kisspeptin are important in the areas of the brain responsible for memory consolidation and orientation in 3-D space. Research in mice suggests that administration of these peptides can help to reverse the learning and navigational impairment often seen in ethanol intoxication[7]. This suggests that kisspeptin and its analogues play a role in the ability of neurons to encode information and may make these peptides of potential interest in offsetting learning deficits seen in certain genetic and chronic disease situations. While this research is in its early stages, it helps to widen our understanding of learning and push us further toward the development of nootropics that can help to stimulate both health and damaged brains to improve function.

Impact on Mood

Just like reproduction and energy status are interconnected, so too are reproduction and emotion interconnected. Given the role of kisspeptin in both reproduction and energy homeostasis, researchers questioned how the peptide might influence emotion and behavior. To test this connection, they compared kisspeptin to placebo administration in 29 healthy heterosexual men. Individuals given kisspeptin showed enhanced limbic brain activity. In particular, the individuals showed increased reward-seeking behavior, increased drive, and improved overall mood[8]. It would appear that kisspeptin plays a role in integrating sexual and emotional brain processing with the overall process of reproduction. These findings help to further our understanding of mood, motivation, and drive not just as they relate to sex, but as they relate to human behavior in general.

Kidney and Heart

Much is made of the role of kisspeptin in reproduction and reproductive hormone control. It comes as a bit of surprise then to learn that kisspeptin is also important in the kidney. Kisspeptin and its receptor are found in several locations throughout the kidney and are thought to play a role in signaling kidney function. Research in mice lacking the Kiss1 receptor reveals that the peptide is important in ensuring glomerular development during development though the exact nature of this action, whether direct or indirect, remains to be elucidated[9].

Though the exact role of kisspeptin in the kidney is not understood, it appears that it may relate to the protein’s larger overall role in controlling vascular development and vascular response to injury. Research in cardiovascular disease in mice suggests that kisspeptin may play an important role certain vascular beds and not others, acting to control vasoconstriction and even cardiac output in specific settings[9]. The impact of kisspeptin in both the kidney and cardiovascular system appears to be related to the effects the peptide has on angiogenesis and vascular function. This same trait may explain the role that kisspeptin plays in reducing metastasis of tumors. Understanding the finer points of how kisspeptin functions in blood vessels will help to move the peptide further into the therapeutic sphere.

Kisspeptin-10 Summary

Kisspeptin is a peptide that acts primarily, but not exclusively, in the brain to control hormone secretion as it relates to human reproduction. There is a great deal of interest in understanding how kisspeptin influences everything from testosterone levels to sex-related behaviors like drive and motivation.

For years it has also been understood that kisspeptin has the potential to influence the growth and metastasis of cancerous cells. Studies have been somewhat contradictory, however, leading to periods of waxing and waning interest in using kisspeptin as a treatment in chemotherapy regimens. The ability o the peptide to influence metastasis may be linked to its role in vascular growth and functioning. Right now, kisspeptin is the subject of a number of intensive trials aimed at deepening our understanding of this versatile and potentially life-saving peptide.

Kisspeptin-10 exhibits minimal to moderate side effects, moderate oral and excellent subcutaneous bioavailability in mice. Per kg dosage in mice does not scale to humans. Kisspeptin-10 for sale at Peptide Sciences is limited to educational and scientific research only, not for human consumption. Only buy Kisspeptin-10 if you are a licensed researcher.

Article Author

The above literature was researched, edited and organized by Dr. E. Logan, M.D. Dr. E. Logan holds a doctorate degree from Case Western Reserve University School of Medicine and a B.S. in molecular biology.

Scientific Journal Author

Floriana Morgillo, M.D. is an Associate Professor of Medical Oncology at the University of Campania “Luigi Vanvitelli”. She received her Medical Degree, cum laude, in 2000 and in 2004 she completed her specialisation in Medical Oncology with Professor Fortunato Ciardiello at the Second University of Naples. In February 2008 she completed the PhD course in Medical Oncology at the same University. From February 2004 to February 2006, she worked at the MD Anderson Cancer Center in the Thoracic Head and Neck Medical Department. During this time she was deeply involved in the studies of acquired resistance to anti-EGFR targeted drugs in non-small cell lung cancer. In June 2009 she received a Translational Research fellowship from ESMO. She is the Principal Investigator and covers the role of Sub-Investigator in several clinical trials and has been a co-author in various publications in important international journals, including one study on the effects of Kisspeptin-10 antitumor efficacy. Floriana Morgillo, M.D. is listed in [10] under the referenced citations.

Floriana Morgillo, M.D. is being referenced as one of the leading scientists involved in the research and development of Kisspeptin. In no way is this doctor/scientist endorsing or advocating the purchase, sale, or use of this product for any reason. There is no affiliation or relationship, implied or otherwise, between Peptide Sciences and this doctor. The purpose of citing the doctor is to acknowledge, recognize, and credit the exhaustive research and development efforts conducted by the scientists studying this peptide. Dr. Floriana Morgillo is listed in [10] under the referenced citations.

Referenced Citations

  1. W. S. Dhillo et al., “Kisspeptin-54 stimulates the hypothalamic-pituitary gonadal axis in human males,” J. Clin. Endocrinol. Metab., vol. 90, no. 12, pp. 6609–6615, Dec. 2005, doi: 10.1210/jc.2005-1468.
  2. J. T. George et al., “Kisspeptin-10 is a potent stimulator of LH and increases pulse frequency in men,” J. Clin. Endocrinol. Metab., vol. 96, no. 8, pp. E1228-1236, Aug. 2011, doi: 10.1210/jc.2011-0089.
  3. C. J. L. Harter, G. S. Kavanagh, and J. T. Smith, “The role of kisspeptin neurons in reproduction and metabolism,” J. Endocrinol., vol. 238, no. 3, pp. R173–R183, 2018, doi: 10.1530/JOE-18-0108.
  4. E. J. Mead, J. J. Maguire, R. E. Kuc, and A. P. Davenport, “Kisspeptins: a multifunctional peptide system with a role in reproduction, cancer and the cardiovascular system,” Br. J. Pharmacol., vol. 151, no. 8, pp. 1143–1153, Aug. 2007, doi: 10.1038/sj.bjp.0707295.
  5. T. Ly, S. Harihar, and D. R. Welch, “KISS1 in metastatic cancer research and treatment: potential and paradoxes,” Cancer Metastasis Rev., Mar. 2020, doi: 10.1007/s10555-020-09868-9.
  6. P. Pazarci et al., “The effects of daylight exposure on melatonin levels, Kiss1 expression, and melanoma formation in mice,” Croat. Med. J., vol. 61, no. 1, pp. 55–61, Feb. 2020.
  7. E. Gibula-Tarlowska and J. H. Kotlinska, “Kissorphin improves spatial memory and cognitive flexibility impairment induced by ethanol treatment in the Barnes maze task in rats,” Behav. Pharmacol., vol. 31, no. 2 & 3, pp. 272–282, Apr. 2020, doi: 10.1097/FBP.0000000000000557.
  8. A. N. Comninos et al., “Kisspeptin modulates sexual and emotional brain processing in humans,” J. Clin. Invest., vol. 127, no. 2, pp. 709–719, doi: 10.1172/JCI89519.
  9. M. Bhattacharya and A. V. Babwah, “Kisspeptin: Beyond the Brain,” Endocrinology, vol. 156, no. 4, pp. 1218–1227, Apr. 2015, doi: 10.1210/en.2014-1915.
  10. Antitumor efficacy of Kisspeptin in human malignant mesothelioma cells. PubMed Central (PMC). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5922395/

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The products offered on this website are furnished for in-vitro studies only. In-vitro studies (Latin: in glass) are performed outside of the body.  These products are not medicines or drugs and have not been approved by the FDA to prevent, treat or cure any medical condition, ailment or disease.  Bodily introduction of any kind into humans or animals is strictly forbidden by law.

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By using this Web Site you agree to comply with any and all local, state, or federal laws, statutes, and regulations that relate in any manner to the use of this Web Site and the associated services or products contained thereon.

Relationship between www.PeptideSciences.com and Users.

www.PeptideSciences.com and users of our Site are independent contractors, and no agency, partnership, employment or other relationship is created or is intended to be created by the use of our Web Site.

Governing Law and Jurisdiction

This Web Site (excluding linked sites, if any) is administered and controlled by www.PeptideSciences.com and its affiliates, subsidiaries, officers, directors, employees or agents from its offices in the accordance with the laws of Nevis. You agree that this Terms and Conditions of Use Agreement and this Web Site will be governed by and construed in accordance Nevis law without giving effect to any principles of conflicts of laws. You access this Web Site and/or associated services of www.PeptideSciences.com at your own risk, and remain responsible for complying with the laws of the jurisdiction within which you are located.

Prices; Payment Terms; Interest

The prices for the products and services on this Web Site are quoted, for convenience, in United States dollars and shall be as set forth in this Web Site as at the time of acceptance of an order by www.PeptideSciences.com. Prices for Products shall be subject to change without any further notice. Credit terms are within www.PeptideSciences.com's sole discretion, and unless otherwise specified in www.PeptideSciences.com's invoice, payment must be received by www.PeptideSciences.com prior to www.PeptideSciences.com's acceptance of an order.

Consequences

www.PeptideSciences.com reserves the right to suspend or terminate your account if you violate the Terms of Use Agreement. If your violation causes harm to others, you agree to indemnify and hold www.PeptideSciences.com harmless from and against any and all loss, damage, or expense. If any dispute arises between us regarding this Agreement or your use of this Web Site, it shall be resolved through good faith negotiations between the parties.

Entire Agreement

These Terms and Conditions and any terms incorporated or referred to herein constitute the entire agreement between www.PeptideSciences.com and you relating to your use of this Web Site and the subject matter hereof, and supersede any prior understandings or agreements (whether electronic, oral or written) regarding the subject matter, and may not be amended or modified except in writing, or by www.PeptideSciences.com making such amendments or modifications in accordance with this Terms and Conditions of Use Agreement.

Severability

If any part of this Terms and Conditions of Use Agreement is deemed or determined to be unenforceable, then such part shall be eliminated or limited to the minimum extent necessary. The remainder of this Terms and Conditions of Use Agreement, including any revised portion, shall remain and be in full force and effect. This Terms and Conditions of Use Agreement are the entire agreement between us governing your use of this Web Site.

Headings

The headings contained in this Terms and Conditions of Use Agreement and the www.PeptideSciences.com Privacy Policy are for reference only.

Force Majeure

www.PeptideSciences.com shall not be liable for any delay or failure in performance caused by circumstances beyond its reasonable control, including, without limitation, delays due to backorders of requested products, mail delays, customs delays or lost shipments. www.PeptideSciences.com shall not be responsible to notify the Customer in the event of such delays. The Customer shall be solely responsible to make other arrangements to purchase alternative products and any costs incurred in connection with such purchases.

Thank you again for visiting the www.PeptideSciences.com Web Site.

Complete Agreement

Except as expressly provided in a particular "legal notice" on this Site, these Terms and Conditions constitute the entire agreement between you and this Site with respect to the use of this Site, and Content. By clicking “I agree” when placing your order, you agree with ALL OF OUR TERMS and CONDITIONS as stated above as well as our Shipping and refunds Policy.

Thank you for your cooperation.