Source comparison
Melanotan-1 Mechanism of Action Detailed: Peptide vs UV-Induced Melanogenesis Comparison
Initiating Signal MC1R activation → cAMP elevation independent of UV p53 activation and DNA damage response trigger α-MSH release Melanotan-1 produces pigmentation without photodamage cAMP Elevation Magnitude 300–500% sustained increase (10–25 µM for 6–12 hour
This comparison does not assign a generated winner or score.
- Initiating Signal
- MC1R activation → cAMP elevation independent of UV
- p53 activation and DNA damage response trigger α-MSH release
- Melanotan-1 produces pigmentation without photodamage
- cAMP Elevation Magnitude
- 300–500% sustained increase (10–25 µM for 6–12 hours)
- 50–150% transient increase (peaks at 2–4 hours post-exposure)
- Higher, more sustained cAMP with peptide administration
- Eumelanin:Pheomelanin Ratio
- 4:1 to 6:1 (MITF upregulates TRP-2, favouring eumelanin pathway)
- 2:1 to 3:1 (oxidative stress diverts pathway toward pheomelanin)
- Melanotan-1 produces darker, more photoprotective pigment
- Time to Visible Pigmentation
- 48–72 hours at 16 mg subcutaneous dose
- 72–96 hours post-UVB exposure at 2–3 MED
- Slightly faster onset with peptide, no latency period
- DNA Damage Markers
- Undetectable (no cyclobutane pyrimidine dimers or 8-oxo-dG formation)
- Elevated CPDs, 8-oxo-dG, and p53 phosphorylation
- Peptide-induced tanning avoids carcinogenic mutations
- Professional Assessment
- Constitutive melanogenesis without UV requirement. Ideal for photoprotection in high-risk populations
- Facultative melanogenesis requiring cumulative DNA damage. Photoprotection arrives after initial injury