Peptable

Comparison

Epitalon vs LL-37

Also see:

EpitalonLL-37

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, LL-37 acts as a broad-spectrum antimicrobial and immunomodulatory peptide involved in host defense and wound repair, but can also promote inflammation and cancer cell proliferation in some contexts5215.

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, LL-37 is a cationic amphipathic 37-amino-acid cathelicidin peptide generated from hCAP18 that disrupts microbial membranes and modulates innate immunity, including chemotaxis, cytokine induction, and NET formation521586.

Receptor

Epitalon

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

LL-37

Functions as a ligand for CXCR2 on neutrophils and other myeloid cells; LL-37 signaling has also been linked to FPR2 and P2X7 in various cell types515

Organism or Origin

Epitalon

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

LL-37

Human cathelicidin antimicrobial peptide generated from the CAP-18 precursor5286

Gene

Epitalon

Not assigned in the current dataset.

LL-37

CAMP

Summary

The clearest overlap between Epitalon and LL-37 is that both converge around Signaling modulator. Their typical research and application settings separate fairly clearly: Epitalon is more often discussed in the realm of Aging and longevity, whereas LL-37 is more often associated with the realm of Immunology and inflammation and Gastroenterology. Both appear to work through Signaling modulator, but the functional emphasis still separates, with Epitalon leaning toward Mitochondrial function modulation and Antioxidant activity and LL-37 leaning toward Anti-pathogenic, Immune regulation, and Tissue repair and healing. Epitalon has a more synthetic analog origin, while LL-37 is closer to natural endogenous background with Epitalon approved for Research use only and LL-37 in Preclinical development. Their usual administration context is also different, with Epitalon more often associated with subcutaneous injection and intranasal delivery and LL-37 with topical / transdermal and intravenous infusion.

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/
52Cathelicidin LL-37: A new important molecule in the ... - PMC - NIH, https://pmc.ncbi.nlm.nih.gov/articles/PMC7388365/
86Cathelicidin antimicrobial peptide - Wikipedia, https://en.wikipedia.org/wiki/Cathelicidin_antimicrobial_peptide