Comparison

Epitalon vs PT-141

Function

While Epitalon is reported to increase lifespan and reduce tumor incidence in animals, and to influence differentiation of neural and mesenchymal stem cells; is studied as an epigenetic regulatory peptide36, PT-141 is FDA-approved for treatment of hypoactive sexual desire disorder in premenopausal women and is studied for sexual dysfunction in other populations, increasing sexual desire via CNS melanocortin pathways42101.

Mechanism

While Epitalon works as a synthetic tetrapeptide, Ala-Glu-Asp-Gly (AEDG), that has been shown to bind histones and modulate gene expression and chromatin state, with reported effects on pineal function, neurogenesis, and longevity in animal models36, PT-141 is the synthetic melanocortin receptor agonist bremelanotide, an analog of α-MSH that activates central MC3R and MC4R to modulate neuronal circuits governing sexual desire and arousal3242101.

Length and Sequence

Epitalon is 4 amino acids long, whereas PT-141 is longer as it has a length of 7 amino acids. Epitalon is made up of a sequence of Alanine, Glutamic acid, Aspartic acid, Glycine. PT-141 is made up of a sequence of sequence data not available in the current dataset.

Receptor

Epitalon

Binds nuclear histone proteins (H1, H2B, H3, H4) rather than a classic membrane receptor36

PT-141

Melanocortin receptors, with highest functional relevance at MC4R and MC3R; also binds MC1R and MC5R3242

Organism or Origin

Epitalon

Synthetic peptide modeled after a pineal gland peptide fraction; not directly encoded as a standalone peptide in humans36

PT-141

Synthetic analog of human α-MSH derived from POMC428190

Gene

Epitalon

Not assigned in the current dataset.

PT-141

POMC

Related articles

No related articles are linked to these peptides yet.

Sources

36AEDG Peptide (Epitalon) Stimulates Gene Expression and Protein ..., https://pmc.ncbi.nlm.nih.gov/articles/PMC7037223/
32PT-141 (Bremelanotide): Research Applications and Quality ..., https://wheretofindpeptides.com/research/pt-141-bremelanotide-research-applications-and-quality-assessment-1
42[PDF] The Discovery and Development of Bremelanotide (PT-141), https://www.benchchem.com/pdf/The_Discovery_and_Development_of_Bremelanotide_PT_141_A_Technical_Guide.pdf
81Proopiomelanocortin (POMC), the ACTH/melanocortin precursor, is ..., https://pmc.ncbi.nlm.nih.gov/articles/PMC2253185/
90alpha-Melanocyte stimulating hormone: production and degradation, https://pmc.ncbi.nlm.nih.gov/articles/PMC3936413/
101PT-141 (Bremelanotide Acetate): Clinical Overview, Uses ... - eNavvi, https://enavvi.com/insights/pt-141-bremelanotide-for-sexual-dysfunction-clinical-guide-for-physicians