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PT-141 Liquid Spray research material
Liquid Spray · Research materialHelio®
Sexual Health Research

PT-141 Liquid Spray

PT-141 Liquid Spray supplies Bremelanotide, a synthetic cyclic heptapeptide melanocortin receptor agonist, in a pre-dissolved liquid intranasal spray format rather than a lyophilized vial. The active compound is chemically identical to vial-form PT-141 (formula C₅₀H₆₈N₁₄O₁₀, molecular weight approximately 1,025.17 g/mol, CAS 189691-06-3, PubChem CID 9941379), built on an N-terminal acetylated norleucine residue and a cyclic lactam bridge with a D-phenylalanine substitution that constrains the scaffold and improves metabolic stability. The liquid format is provided to support research workflows that require a solution-phase or intranasal delivery configuration.

As with the vial, PT-141 is studied as a nonselective agonist across the MC1R, MC3R, MC4R, and MC5R melanocortin receptor subtypes, with particular research attention on MC4R signaling in central neuroendocrine models. This spray is supplied as a reference material for laboratory and in vitro research use only and is not intended for human or veterinary use.

Identification
  • MaterialPT-141 Liquid Spray
  • Research AreaSexual Health
  • PresentationLiquid Spray
  • Available SizesSpray
  • CAS Number189691-06-3
  • Molecular FormulaC₅₀H₆₈N₁₄O₁₀
  • Molecular Weight1,025.17 g/mol
  • TypeSynthetic cyclic heptapeptide
  • Receptor / TargetMelanocortin receptor agonist (MC1R, MC3R, MC4R, MC5R)
  • PubChem CID9941379 →
Amino Acid Sequence

Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-OH

Analytical Data
  • Purity (HPLC)≥99%
  • Identity (MS)Confirmed to specification
  • TestingAccredited (ISO 17025) third-party laboratory
  • DocumentationPer-batch COA →
From$49.95

Research use only — not for human or animal consumption. Per-batch documentation is provided with the material.

Key Characteristics
Peptide NamePT-141 (Bremelanotide)
CAS Number189691-06-3
PubChem CID9941379
Molecular FormulaC₅₀H₆₈N₁₄O₁₀
Molecular Weight1,025.17 g/mol
SequenceAc-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-OH
Amino Acid Count7 amino acids (cyclic lactam structure)
Molecular TypeSynthetic cyclic heptapeptide
FormLiquid spray (intranasal/solution format)
Purity≥99% - HPLC and mass spectrometry confirmed
SolubilitySoluble in water; freely soluble in dilute acetic acid
StorageRefrigerate at 2-8°C; protect from light
Research Context
Melanocortin receptor pharmacologyUsed as an agonist probe across the MC1R, MC3R, MC4R, and MC5R receptor subtypes in receptor-binding and functional signaling assays.
MC4R signalingInvestigated for central melanocortin-4 receptor engagement in hypothalamic tissue models and second-messenger readouts.
Solution-phase delivery researchThe pre-dissolved liquid format supports studies requiring solution-state or intranasal administration configurations in research models.
Comparative structure-activity studiesCompared against its linear precursor Melanotan II to examine cyclization and D-amino acid effects on subtype selectivity.
Neuroendocrine researchApplied in animal models exploring melanocortin modulation of central neurotransmitter signaling.
Research Findings

Bremelanotide is characterized in the literature as a high-affinity, nonselective melanocortin receptor agonist with predominant functional activity at MC1R and MC4R. Reported animal-model findings link MC4R activation in the medial preoptic area of the hypothalamus to downstream dopamine release. Delivered in a solution-phase spray format, the compound retains the same molecular identity as the lyophilized vial; researchers typically confirm concentration and stability of pre-dissolved peptide solutions as part of experimental characterization.

History

PT-141 (Bremelanotide) was developed as a cyclic heptapeptide analog derived from the linear melanocortin agonist Melanotan II and became one of the most extensively studied melanocortin receptor agonists. Under the name Bremelanotide (Vyleesi), it received FDA approval in June 2019 for a specific human clinical indication. Liquid and intranasal spray formats have historically been used in research settings as alternatives to reconstituted lyophilized powder.

References
  1. Kingsberg SA, et al. Bremelanotide for the Treatment of Hypoactive Sexual Desire Disorder. Obstet Gynecol. 2019.
  2. Molinoff PB, et al. PT-141: a melanocortin agonist for the treatment of sexual dysfunction. Ann N Y Acad Sci. 2003;994:96-102.
  3. Clayton AH, et al. Safety Profile of Bremelanotide Across the Clinical Development Program. J Womens Health (Larchmt). 2022;31(2):171-182.
  4. Dhillon S, Keam SJ. Bremelanotide: First Approval. Drugs. 2019;79(14):1599-1606.
  5. PubChem Compound Summary, CID 9941379, Bremelanotide. National Center for Biotechnology Information.

View compound profile on NIH PubChem →

Cited literature refers to laboratory and preclinical research. PT-141 Liquid Spray is supplied strictly for research use only and is not intended to diagnose, treat, cure, or prevent any disease.

Why researchers choose Helio
99%+ PurityHPLC-verified every batch
Accredited TestingIndependent ISO 17025 laboratory
Per-Batch COADocumentation tied to your lot
Made in the USADiscreet, protected shipping
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