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Overview of Kisspeptin

Kisspeptin is a crucial hormone that plays a central role in regulating the reproductive system. Produced primarily in the hypothalamus, it acts as a key signalling molecule, stimulating the release of gonadotropin-releasing hormone (GnRH). This, in turn, triggers the secretion of luteinizing hormone (LH) and follicle-stimulating hormone (FSH), essential for puberty, fertility, and overall reproductive health [1].

Research professionals have found that Kisspeptin is also involved in controlling sexual maturation and maintaining the menstrual cycle. Beyond reproduction, it influences behaviors like mood and appetite. Disruptions in kisspeptin signaling are linked to conditions like infertility and delayed puberty, highlighting its importance in human physiology and health [2].

Molecular Formula: C63H83N17O14

Peptide Sequence: H-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH2

Molecular Weight: 5857 g/mol

Source: PubChem

Kisspeptin Structure  PharmaLabGlobal

View the Kisspeptin HPLC Certificate here.

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Buy Kisspeptin Peptide Vial  from PharmaLabGlobal

The Benefits of Kisspeptin

Kisspeptin is available in 10 mg Peptide Vials.

Peptides supplied in sterile glass vials require reconstitution before use. Find the full range of laboratory research supplies on the consumables page.

Kisspeptin Action

Kisspeptin operates as a pivotal regulator of the reproductive axis through its interaction with the G-protein-coupled receptor, GPR54 (also known as KISS1R). Produced in specific neurons within the hypothalamus, kisspeptin binds to GPR54 on gonadotropin-releasing hormone (GnRH) neurons. This binding triggers a cascade of intracellular signalling events, leading to the release of GnRH into the hypothalamic-pituitary portal system. GnRH then stimulates the anterior pituitary gland to secrete luteinizing hormone (LH) and follicle-stimulating hormone (FSH), which are essential for gonadal function, including ovulation in females and spermatogenesis in males [3].

The Kisspeptin receptor is highly sensitive to hormonal feedback, particularly from sex steroids like estrogen and testosterone, allowing it to finely tune reproductive processes. It also integrates environmental and metabolic cues, such as stress and energy availability, to regulate reproductive timing. Scientists believe that this mechanism plays a crucial role in Kisspeptin’s critical role in maintaining reproductive health and its potential as a therapeutic target for fertility disorders.

Peptide Nasal Sprays are a painless and convenient way of investigating peptides. 

Buy Kisspeptin Nasal Spray for research use – available in 15ml containing 10mg of Kisspeptin and 30ml containing 20mg of Kisspeptin.

Buy Kisspeptin Hormone  PharmaLabGlobal

Possible Future Clinical Applications of Kisspeptin

Laboratory studies have identified a wide range of biological processes that the Kisspeptin peptide bond may have an important role in the following applications:

Regulates Reproductive Health and Enhances Fertility

Kisspeptin is a powerful hormone that plays a key role in regulating the reproductive system and promoting fertility. At the heart of its function is the hypothalamic-pituitary-gonadal (HPG) axis, a vital communication network that governs reproductive processes. Kisspeptin acts as a master switch in this system, ensuring proper hormonal signalling for fertility and overall reproductive health.

The HPG axis begins in the hypothalamus, a small but influential region of the brain. Kisspeptin is produced by specialized neurons here, and its primary role is to stimulate the release of gonadotropin-releasing hormone (GnRH). GnRH, in turn, prompts the pituitary gland to release two critical fertility hormones, luteinizing hormone (LH) and follicle-stimulating hormone (FSH). These hormones signal the ovaries in women and the testes in men, driving processes such as ovulation and sperm production [1].

Kisspeptin’s interaction with GnRH ensures that the delicate hormonal balance needed for fertility is maintained. For instance, in women, LH and FSH are responsible for triggering ovulation, the release of a mature egg from the ovary. Kisspeptin ensures that this process happens at the right time by controlling the upstream release of GnRH.

Similarly, in men, kisspeptin indirectly influences spermatogenesis by driving the production of LH and FSH. These hormones are essential for the development of healthy sperm cells, which are necessary for fertilization.

What makes Kisspeptin particularly unique is its ability to respond to hormonal feedback from the body. Levels of sex hormones like estrogen and testosterone can fluctuate throughout life, and Kisspeptin adjusts its activity accordingly. For example, as oestrogen levels rise during the menstrual cycle, Kisspeptin helps fine-tune the release of GnRH to ensure ovulation occurs at the optimal time. This sensitivity allows Kisspeptin to act as the body’s reproductive thermostat, maintaining balance in the face of changing conditions [4].

Treats Reproductive Disorders

Kisspeptin’s critical role in reproduction makes it a promising target for fertility treatments. Traditional hormone therapies for infertility can sometimes be invasive or cause side effects, but kisspeptin-based treatments offer a more natural approach. By directly regulating GnRH release, kisspeptin therapies may help women with conditions like polycystic ovary syndrome (PCOS) or men with low sperm counts achieve healthy reproductive function. Early studies indicate that kisspeptin-based treatments could be safer and more effective for restoring fertility than some current options [5].

Mood Regulation

Emerging scientific evidence suggests that Kisspeptin plays a part in regulating mood, emotions, and behavioural responses. By interacting with key areas of the brain involved in emotional processing, this hormone holds potential as a treatment for mood disorders, offering hope for individuals seeking better mental and emotional well-being.

Studies have shown that Kisspeptin can modulate stress and emotional arousal. For instance, it appears to lower anxiety-like behaviours in experimental models by calming hyperactivity in emotional processing centres of the brain. Additionally, Kisspeptin has shown promise in enhancing positive emotional responses, like feelings of bonding and attraction, further tying it to emotional regulation [6].

Interestingly, research indicates that kisspeptin may also influence sexual and romantic behaviors, linking emotional well-being with reproductive function. By improving positive emotional states and reducing stress, it acts as a bridge between physiological and psychological health.

Inhibition of Tumour Metastasis

The gene responsible for producing Kisspeptin, KISS1, has been identified as a metastasis suppressor. This means it helps prevent cancer cells from leaving their original site, a process known as metastasis. Metastasis is one of the deadliest aspects of cancer, as it allows tumours to spread to critical organs. KISS1 expression has been found to suppress this process, making Kisspeptin a significant player in cancer prevention.

Kisspeptin’s influence on cancer metastasis is linked to its interaction with the receptor GPR54, expressed on various cell types, including some cancer cells. Once Kisspeptin binds to GPR54, it activates signalling pathways that reduce the ability of cancer cells to migrate and invade nearby tissues. 

Research has shown that Kisspeptin plays a significant role in certain cancers, such as melanoma, breast cancer metastasis, and ovarian cancer. For instance, in melanoma, high levels of KISS1 expression are associated with a lower likelihood of metastasis and better patient outcomes. Similarly, in breast and ovarian cancers, Kisspeptin has been observed to reduce metastatic potential, offering hope for targeted treatments [7].

Pharma Lab Global Nasal Spray Stack PT 141 and Kisspeptin 30ml

Buy Kisspeptin & PT-141 Peptide Combo

Combining kisspeptin and PT-141 could offer exciting benefits in reproductive health and sexual function. Kisspeptin plays a central role in regulating the reproductive axis, supporting fertility and hormonal balance, while PT-141 (Bremelanotide) is known for enhancing sexual desire by acting on the brain’s melanocortin receptors.

Together, they could synergistically improve libido through PT-141’s direct stimulation of sexual arousal and kisspeptin’s regulation of hormonal processes critical for fertility.

Additionally, the pair may potentially support emotional well-being by addressing both physical and psychological aspects of sexual health. This combination holds promise for individuals seeking enhanced sexual and reproductive wellness.

Buy Kisspeptin & PT-141 Nasal Spray Peptide Combo.

Scientific Research

[1] Xie Q, Kang Y, Zhang C, Xie Y, Wang C, Liu J, Yu C, Zhao H, Huang D. The Role of Kisspeptin in the Control of the Hypothalamic-Pituitary-Gonadal Axis and Reproduction. Front Endocrinol (Lausanne). 2022 Jun 28;13:925206. 

[2] Chan YM, Lippincott MF, Sales Barroso P, Alleyn C, Brodsky J, et al. Using Kisspeptin to Predict Pubertal Outcomes for Youth With Pubertal Delay. J Clin Endocrinol Metab. 2020 Aug 1;105(8):e2717–25.

[3] Casteel CO, Singh G. Physiology, Gonadotropin-Releasing Hormone. [Updated 2023 May 1]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-.

[4] Chan YM, Butler JP, Sidhoum VF, Pinnell NE, Seminara SB. Kisspeptin administration to women: a window into endogenous kisspeptin secretion and GnRH responsiveness across the menstrual cycle. J Clin Endocrinol Metab. 2012 Aug;97(8):E1458-67.

[5] Tang R, Ding X, Zhu J. Kisspeptin and Polycystic Ovary Syndrome. Front Endocrinol (Lausanne). 2019 May 10;10:298.

[6] Mills EG, Yang L, Abbara A, Dhillo WS, Comninos AN. Current Perspectives on Kisspeptins Role in Behaviour. Front Endocrinol (Lausanne). 2022 Jun 9;13:928143.

[7] Angeliki Makri, Nikolaos Pissimissis, Peter Lembessis, Constantine Polychronakos, Michael Koutsilieris, The kisspeptin (KiSS-1)/GPR54 system in cancer biology, Cancer Treatment Reviews, Volume 34, Issue 8, 2008, Pages 682-692.

Further Reading:

HCG Peptide in Fertility Treatment

The blog explores the role of Human Chorionic Gonadotropin (HCG) in fertility treatments, highlighting its applications in both male and female reproductive health. HCG is used to induce ovulation in women undergoing assisted reproductive technologies like IVF and supports the luteal phase for successful implantation. In men, it stimulates testosterone production and improves sperm quality, aiding fertility. The blog also discusses the benefits of HCG, such as higher success rates in treatments, reduced risk of ovarian hyperstimulation syndrome, and its potential as an alternative to testosterone replacement therapy.

What is the Best Peptide Combination?

This article discusses the benefits of combining peptides for enhanced research outcomes, emphasizing their synergistic effects. It highlights key peptide pairings like GHRP-6 and Sermorelin for growth hormone stimulation, TB500 and BPC-157 for tissue repair, and KPV with BPC-157 for reducing inflammation. Each combination is tailored to specific research goals, such as muscle growth, healing, or reproductive health. The article underscores the importance of understanding peptide interactions to optimize their effects and explores the future potential of peptide combinations in advancing therapeutic research.

PT-141 and Kisspeptin Revolutionizing Sexual Disorder Treatment

The blog explores the potential of PT-141 and Kisspeptin peptides in addressing sexual disorders. PT-141, derived from Melanotan II, enhances sexual arousal by activating melanocortin receptors, while Kisspeptin regulates reproductive hormones and sexual behavior. Together, they show promise in treating conditions like hypoactive sexual desire disorder (HSDD), erectile dysfunction, and fertility issues. The blog highlights their benefits, including increased libido, mood improvement, and hormonal regulation, supported by early clinical trials.

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