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GONADORELIN (Washout Cycle) 10 mg x 1 vial – Superior Peptide

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Description

What Is PT-141?

Superior Peptide PT-141, also called bremelanotide, is sometimes referred to as the female Viagra because the peptide was previously investigated in phase IIb human clinical trials for use in treating female hypoactive sexual desire disorder (HSDD). PT-141 is a melanocortin that binds primarily to melanocortin 4 receptor (MC-4R) and MC-1R. In 2009, PT-141 was also investigated as a treatment for acute hemorrhage. PT-141 is a derivative of another synthetic melanocortin, melanotan 2 (MT-2).

PT-141 Molecular Structure

Sequence: Ac-Nle-Asp(1)-His-D-Phe-Arg-Trp-Lys(1)
Molecular Formula: C50H68N14O10
Molecular Weight: 1025.182 g/mol
PubChem CID: 9941379
CAS Number: 189691-06-3

Source: PubChem

PT-141 Research

PT-141 and Sexual Arousal

PT-141 is a unique peptide in that it stimulates the MC-4R, which is known to produce sexual arousal in the central nervous system and influence sexual behavior[1], [2]. Studies in mice have shown that agonist binding to MC-4R causes sexual arousal and increased copulation in both males and females[3], [4]. Because PT-141 works via a different mechanism than drugs like Viagra, it is possible to treat sexual arousal disorders in both men and women that stem from causes other than reduced blood flow to the genitals. A study of men with erectile dysfunction (ED) who did not respond to sildenafil (Viagra) found that roughly one-third experienced adequate erection for sexual intercourse with PT-141 (administered via nasal spray). There was also a strong dose-dependent response in the trial, indicating that PT-141 is indeed effective in certain cases[]. This suggests that PT-141 could offer insight into correcting ED in settings where sildenafil has failed and may offer insight into central causes of hypoactive sexual desire.

Duration of penile base rigidity greater than 60% for placebo compared to various doses of PT-141. Source: Nature Interestingly, PT-141 was pulled from clinical trials before it reached approval for use in women suffering from HSDD. This is despite signs that the drug increased the number of satisfying sexual events per month and decreased female sexual distress scores in a statistically significant manner without any substantial side effects[6]. Many experts who treat female sexual dysfunction (FSD) were dismayed to find the peptide was not being advanced despite positive results. They point to a lack of established endpoints for trials of FSD and socio-cultural biases against women’s sexual health as the primary roadblocks that are inhibiting approval of what they see as much-needed therapies[7]. They hope that greater attention will be given to the topic and that the FDA will establish more concrete guidelines for evaluating therapies like PT-141 that can offer benefit. These experts also expressed dismay that the pharmacological treatments were not tested in conjunction with other established means of treating sexual dysfunction as they believe that the combination may prove synergistic and that peptides like PT-141 may be useful for overcoming initial barriers and jump-starting psychological treatment modalities. In 2017, partly in response to the outcry against the cessation of earlier trials, Phase II Reconnect trials were launched using subcutaneous injections of PT-141 for FSD. The newest version of PT-141, called Rekynda, may soon be available for use in the United States. It would be legal to use PT-141 off-label, at that point, to treat both male and female sexual dysfunction[8]. These new trials have relied on the kind of modified endpoints that experts in FSD have touted as beneficial to seeing these kinds of treatments approved.
PT-141 and Hemorrhage

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