Key Characteristics
- Category: Injectable Peptides
- Purity: >99% Purity
- Molecular Formula: C50H68N14O10
- Molecular Weight: 1025.2 g/mol
- Sequence: Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-OH
Available Sizes
About
PT-141 is a synthetic peptide analogue of α-MSH developed for its potent effects on libido and sexual arousal. It works through the central nervous system to increase sexual desire.
Mechanism of Action
Unlike drugs like Viagra that work on the vascular system, PT-141 is a melanocortin receptor agonist that acts on the brain. It primarily activates the MC4R and MC3R receptors in the hypothalamus, which are directly involved in modulating sexual arousal and desire.
Key Benefits
- Increases libido and sexual desire in both men and women
- Acts on the central nervous system, not the cardiovascular system
- Effective for arousal issues unresponsive to traditional treatments
- Can induce spontaneous erections in men
Clinical Research
PT-141 (as Bremelanotide, brand name Vyleesi) is FDA-approved for the treatment of hypoactive sexual desire disorder (HSDD) in premenopausal women. Extensive clinical trials have demonstrated its efficacy in increasing sexual desire.
Potential Side Effects
The most common side effects are nausea, flushing, and headache. A temporary increase in blood pressure can also occur shortly after administration.
Usage & Dosage
Administered via subcutaneous injection, typically 30 minutes to a few hours before anticipated sexual activity. Dosages for research range from 0.5mg to 2mg.
Peptide Storage
Best Practices For Storing Peptides
To preserve the integrity of laboratory results, proper storage of peptides is essential. Correct storage practices can maintain peptides for years and guard against contamination, oxidation, and degradation. If the peptides will be used immediately, short-term refrigeration under 4°C (39°F) is generally acceptable. Lyophilized peptides are usually stable at room temperatures for several weeks.
For longer-term storage (several months to years), it is preferable to store peptides in a freezer at -80°C (-112°F). Avoid repeated freeze-thaw cycles and do not use frost-free freezers, as temperatures can fluctuate widely.
Preventing Contamination
To prevent moisture contamination, allow the peptide to come to room temperature before opening its container. Minimize exposure to air; after use, reseal the container under an atmosphere of dry, inert gas (like nitrogen or argon) if possible. Peptides with Cys, Met, or Trp are especially prone to air oxidation.
Storing Peptides In Solution
The shelf life of peptide solutions is far less than that of lyophilized peptides. If peptides must be stored in solution, use sterile buffers at pH 5-6 and separate into aliquots to avoid repeated freezing and thawing. Peptide solutions are generally stable for up to 30 days when refrigerated at 4°C (39°F).