GH-Axis & Endocrine SignalingPT-141
A central-acting melanocortin agonist that works on CNS pathways, studied for its non-vascular signaling effects.
This peptide works in the brain on melanocortin receptors. It's been studied for its effects on various central nervous system pathways.
Central-acting melanocortin agonist
Works on CNS pathways
Non-vascular signaling mechanism
Research shows CNS effects
Mechanism
Scientific Mechanism
PT-141 (bremelanotide) is a melanocortin-receptor agonist studied primarily for its activity at the MC3R and MC4R subtypes expressed in hypothalamic and other central nervous system circuits, distinct from the peripheral MC1R pathway associated with pigmentation research. Because these target receptors sit within CNS signaling networks rather than vascular endothelium, research literature describes its downstream activity as centrally mediated rather than dependent on nitric-oxide-driven vasodilation, which is the mechanism used by non-melanocortin vascular-signaling compounds. This receptor-selectivity profile is what researchers use to distinguish melanocortin-pathway compounds like PT-141 from compounds acting through peripheral vascular mechanisms.
Mechanism Detail
How It Works
PT-141 is studied for central melanocortin-receptor engagement:
melanocortin: Binds MC3R/MC4R melanocortin receptor subtypes concentrated in hypothalamic tissue
cns: Downstream signaling is studied within central nervous system circuits rather than local vascular tissue
nonvascular: This distinguishes its research profile from mechanisms that depend on nitric-oxide-mediated vasodilation
Research Evidence
What the Research Shows
Cns
• Research shows measurable engagement of central melanocortin receptor pathways following administration
• Studies distinguish PT-141's centrally-mediated activity from peripheral, nitric-oxide-dependent vascular mechanisms
• Receptor-binding research has been used to compare MC3R and MC4R selectivity against other melanocortin agonists, including MT2
Research Dosing
Dosing & Administration Reference
THIS IS FOR EDUCATIONAL PURPOSES ONLY. Always follow your healthcare provider's instructions.
Starting Dose
0.1-0.3mg as needed (in research studies)
Study Duration
Variable in research studies
Reconstitution Calculator
Reconstitution math for research reference only. Not dosing guidance.
Reconstitution ReferenceDiluent: Bacteriostatic water (0.9% benzyl alcohol)
Example Vial: 10mg peptide
BAC Water: 2.0mL
Concentration: 5.0mg per 1mL
Storage & Handling
Stability Protocol
Lyophilized powder: store at -20°C with desiccant, protected from light. Reconstituted solution: refrigerate at 2–8°C, discard after 28–30 days or if cloudiness/particulate appears.
References
Research Sources
Related
Frequently Researched Alongside
Research Use Only: Intended for in-vitro laboratory research only. Not for human or animal consumption. This page provides educational and research-context information only — it does not constitute dosing, administration, or medical advice.