Epithalon
Synthetic tetrapeptide corresponding to the active region of epithalamin, a polypeptide fraction of bovine pineal gland. Studied primarily for telomerase activation via hTERT transcriptional upregulation in somatic cell models, and for modulation of melatonin biosynthesis, antioxidant enzyme systems, and hypothalamic-pituitary axis interactions.
Mechanism of Action
Epithalon (Ala-Glu-Asp-Gly) is a synthetic tetrapeptide derived from epithalamin, which is a natural polypeptide fraction isolated from bovine pineal gland tissue. The tetrapeptide sequence was identified by the Khavinson research group as the bioactive fragment of the larger epithalamin preparation. The primary mechanism under study is telomerase activation — specifically, the ability of Epithalon to upregulate hTERT (human telomerase reverse transcriptase) at the transcriptional level.
Telomeres are repetitive nucleotide sequences (TTAGGG repeats) at the ends of linear chromosomes that serve a protective function analogous to aglet tips on shoelaces. With each cell division, telomeres shorten progressively because conventional DNA polymerases cannot fully replicate chromosome ends — a phenomenon termed the end-replication problem. Telomerase is the ribonucleoprotein complex that counteracts this shortening by adding telomeric repeats; its catalytic component is hTERT, which is normally repressed in most adult somatic cells. Upregulation of hTERT, and consequent extension of critically shortened telomeres, constitutes the primary molecular endpoint studied with Epithalon in cell culture longevity research.
Secondary mechanisms under investigation include: (1) regulation of melatonin biosynthesis in pinealocytes, given the peptide's origin from pineal gland tissue and the documented importance of melatonin in circadian rhythm regulation and antioxidant defence; (2) modulation of antioxidant enzyme systems, with published work describing enhanced superoxide dismutase and catalase activity in aged animal tissue following administration; and (3) interactions with hypothalamic-pituitary axis signalling observed in aged rodent models, suggesting broader neuroendocrine effects beyond the pineal compartment.
Key Research Findings
- Telomerase activation and telomere elongation in human somatic cell cultures following Epithalon administration has been described in published work from the Khavinson group. Khavinson et al., Bulletin of Experimental Biology and Medicine, 2003.
- Inhibition of tumour proliferation in several rodent cancer models has been described in publications from the St. Petersburg Institute of Bioregulation and Gerontology, attributed in part to normalisation of telomere-associated cellular ageing mechanisms. Khavinson research group, St. Petersburg Institute of Bioregulation and Gerontology, Epithalon oncology literature.
- Normalisation of circadian rhythms and melatonin synthesis in aged rats has been published by the Khavinson research group, consistent with the peptide's origin from pineal tissue and proposed pinealocyte-modulating activity. Khavinson and Anisimov research group, pineal-derived peptide and circadian biology literature.
- Enhanced antioxidant enzyme activity — specifically superoxide dismutase and catalase — in aged animal models has been described in multiple publications from the Khavinson group, indicating indirect effects on oxidative stress defence beyond direct antioxidant activity. Khavinson research group, ageing biomarker and antioxidant enzyme literature.
- Extended lifespan findings in Drosophila and rodent models have been published; replication data in higher organism models and mechanistic understanding of the lifespan extension pathway remain active research areas. Khavinson, Anisimov and colleagues, lifespan-extension and gerontology literature, 2000s.
Citations last reviewed: 1 October 2026
As Supplied by BasedPeps
Researcher FAQ
What is Epithalon?
Epithalon (Ala-Glu-Asp-Gly) is a synthetic tetrapeptide corresponding to the active region of epithalamin, a natural polypeptide fraction extracted from bovine pineal gland. It is studied primarily for its reported ability to activate telomerase via upregulation of hTERT (human telomerase reverse transcriptase) transcription in cell culture models, and for interactions with pineal gland and melatonin biosynthesis pathways.
How does Epithalon relate to telomerase research?
Telomerase is an enzyme that elongates telomeres — repetitive DNA sequences at chromosome ends that shorten with each cell division, serving as a biological aging marker. Epithalon is studied for its reported capacity to upregulate hTERT (the catalytic component of telomerase) at the transcriptional level in somatic cell cultures, with published work from the Khavinson group describing telomere elongation following exposure. Telomerase activation research examines whether this can modulate replicative senescence endpoints in research models.
How is Epithalon reconstituted and stored?
Epithalon is supplied as lyophilised powder, stored at −20 °C. Reconstitution in sterile bacteriostatic water or sterile physiological saline is standard for research use. Reconstituted solution should be stored at 2–8 °C and used within 28 days. Avoid repeated freeze-thaw cycles to preserve peptide integrity.
What research category does Epithalon belong to?
Epithalon is classified under longevity research. Investigational areas include telomere biology, cellular senescence, pineal gland function, melatonin biosynthesis regulation, and antioxidant enzyme systems in aging research models.
Does BasedPeps provide purity documentation?
Yes. Every BasedPeps lot includes a third-party Certificate of Analysis documenting HPLC purity (≥99%) and mass spectrometric identity confirmation. Certificates of Analysis are available per batch on request.
View BasedPeps Epithalon
Research-grade Epithalon tetrapeptide. Third-party HPLC and mass spectrometry verification per lot. Certificate of Analysis available on request. Dispatched from Riga, Latvia within 24 hours.
View BasedPeps Epithalon →