Comparison

Epitalon vs PEG-MGF

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, PEG-MGF is used experimentally to enhance muscle repair and hypertrophy after mechanical overload or injury by stimulating satellite-cell activation and protein synthesis6373138.

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, PEG-MGF is a poly(ethylene glycol)-conjugated form of Mechano Growth Factor (IGF-1Ec splice variant) comprising the 24-aa C-terminal E-peptide of IGF-1, designed to extend half-life while activating IGF-1 receptor–mediated anabolic signaling in muscle satellite cells637322138.

Length and Sequence

Epitalon is 4 amino acids long, whereas PEG-MGF is longer as it has a length of 24 amino acids. Epitalon is made up of a sequence of Alanine, Glutamic acid, Aspartic acid, Glycine. PEG-MGF is made up of a sequence of Tyrosine, Glutamine, Proline, Proline, Serine, Threonine, Asparagine, Lysine, Asparagine, Threonine, Lysine, Serine, Glutamine, Arginine, Arginine, Lysine, Glycine, Serine, Threonine, Phenylalanine, Glutamic acid, Glutamic acid, Arginine, Lysine.

Receptor

Epitalon

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

PEG-MGF

Insulin-like growth factor 1 receptor (IGF1R), the canonical receptor for IGF-1 peptides22133134139

Organism or Origin

Epitalon

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

PEG-MGF

Synthetic PEGylated analog of human MGF (IGF-1Ec isoform) 2273138

Gene

Epitalon

Not assigned in the current dataset.

PEG-MGF

IGF1

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/
22Mechano growth factor - Wikipedia, https://en.wikipedia.org/wiki/Mechano_growth_factor
63Sourcing, https://exploring-peptides.com/peptide-wikipedia/pegmgf/
73PEG-MGF, https://peptidestandard.com/peg-mgf-research/
133IGF1R - Abcam, https://www.abcam.com/en-us/targets/igf1r/24611
134Insulin-like growth factor 1 receptor - Wikipedia, https://en.wikipedia.org/wiki/Insulin-like_growth_factor_1_receptor
138A Splice Variant of IGF-1 within the Growth Plate | PLOS One, https://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0076133
139IGF1 receptor signaling pathways, https://pubmed.ncbi.nlm.nih.gov/29535161/