PT-141 (Bremelanotide) – 10MG

Scientific Overview of PT-141 (Bremelanotide)

PT-141, also known as Bremelanotide, is a synthetic melanocortin analog derived from Melanotan 2 (MT-2). Melanocortin analogs are synthetic compounds that may mimic or influence the functions of natural melanocortin peptides, such as alpha-melanocyte stimulating hormone (α-MSH). These natural peptides appear to be involved in processes including pigmentation, appetite regulation, immune responses, and energy balance.

PT-141 was developed to interact primarily with the Melanocortin-4 Receptor (MC-4R), although other melanocortin receptors (MC-1R, MC-2R, MC-3R, and MC-5R) may also play varying roles in physiology. For instance, MC-1R appears linked to pigmentation, MC-2R to adrenal activity, MC-3R to metabolic regulation, and MC-5R to exocrine functions such as sweating and sebum production.

Alternative Names: Bremelanotide

PT-141 Studies and Research Data

Neural Pathways and MC-4R Interactions

Research suggests that PT-141 uniquely stimulates MC-4R, which may influence neural cascades associated with reproductive and behavioral responses . In controlled studies, PT-141 was observed to impact central brain regions associated with arousal and motivation. Functional neuroimaging indicated potential changes in cerebellar and supplementary motor areas, as well as possible modulation of sensory and emotional processing regions such as the amygdala and insula .

PT-141 Investigations into Cavernous Tissues

Studies have also explored PT-141 within the context of cavernous tissue physiology. Scholars propose that melanocortin agonists may play a role in influencing vasodilator concentrations within key tissues. Data from mouse experiments suggested that nitric oxide (NO) pathways might contribute to increased cavernosal pressure when melanocortin receptors are activated, though these findings remain tentative and require further validation .

Comparisons to Other Melanocortin Analogs

Animal model studies comparing PT-141 with other melanocortin analogs, such as Melanotan II, indicated possible influences on sexual motivation and behavioral activity in both male and female rats . These findings suggest that melanocortin receptor agonism may impact both physiological and behavioral outcomes.

Broader Cellular Pathways

While PT-141 is more biased toward MC-3R and MC-4R, some evidence suggests that it may retain activity at MC-1R. This receptor has been implicated in DNA repair and antioxidant pathways, raising the possibility that melanocortin signaling contributes to cell survival mechanisms .

Conclusion

PT-141 (Bremelanotide) has been investigated as a synthetic melanocortin analog with potential interactions across multiple melanocortin receptors, with a particular emphasis on MC-4R. Research suggests that it may influence neural activity, vascular responses, and cellular pathways. Findings remain exploratory, with variability in outcomes depending on model systems and methodological approaches. Continued research is required to clarify its broader scientific relevance.

References

1. Clayton AH, Althof SE, Kingsberg S, DeRogatis LR, Kroll R, Goldstein I, Kaminetsky J, Spana C, Lucas J, Jordan R, Portman DJ. Bremelanotide for female sexual dysfunctions in premenopausal women: a randomized, placebo-controlled dose-finding trial. Womens Health (Lond). 2016 Jun;12(3):325-37. doi: 10.2217/whe-2016-0018. Epub 2016 May 16. PMID: 27181790; PMCID: PMC5384512.
2. Maresca V, Flori E, Picardo M. Skin phototype: a new perspective. Pigment Cell Melanoma Res. 2015 Jul;28(4):378-89. doi: 10.1111/pcmr.12365. Epub 2015 Apr 11. PMID: 25786343.
3. Pfaus, J. G., Shadiack, A., Van Soest, T., Tse, M., & Molinoff, P. (2004). Selective facilitation of sexual solicitation in the female rat by a melanocortin receptor agonist. Proc Natl Acad Sci U S A, 101(27), 10201–10204. https://doi.org/10.1073/pnas.0400491101
4. Rosen RC, Diamond LE, Earle DC, Shadiack AM, Molinoff PB. Evaluation of the safety, pharmacokinetics and pharmacodynamic effects of subcutaneously administered PT-141, a melanocortin receptor agonist, in healthy male subjects and in patients with an inadequate response to Viagra. Int J Impot Res. 2004 Apr;16(2):135-42. doi: 10.1038/sj.ijir.3901200. PMID: 14999221.
5. Rössler AS, Pfaus JG, Kia HK, Bernabé J, Alexandre L, Giuliano F. The melanocortin agonist, melanotan II, enhances proceptive sexual behaviors in the female rat. Pharmacol Biochem Behav. 2006 Nov;85(3):514-21. doi: 10.1016/j.pbb.2006.09.023. Epub 2006 Nov 20. PMID: 17113634.
6. Miller MK, Smith JR, Norman JJ, Clayton AH. Expert opinion on existing and developing drugs to treat female sexual dysfunction. Expert Opin Emerg Drugs. 2018 Sep;23(3):223-230. doi: 10.1080/14728214.2018.1527901. Epub 2018 Oct 11. PMID: 30251897.

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