NordBioLab Research TeamCategory: Longevity Research | Reading time: 5 min | For research use only
Epithalon (also written Epitalon or Epithalamin synthetic analogue) is a tetrapeptide with the sequence Ala-Glu-Asp-Gly. It was developed by the St. Petersburg Institute of Bioregulation and Gerontology in Russia, primarily through the work of Professor Vladimir Khavinson, whose laboratory has produced the majority of published research on this compound over the past three decades.
Epithalon is structurally derived from Epithalamin — a polypeptide extract from the pineal gland — and represents the biologically active tetrapeptide fraction of that extract. Its research profile is concentrated in telomere biology, pineal gland function, and longevity models.
This article summarizes published research on Epithalon for scientific and educational purposes. All compounds discussed are strictly for laboratory and research use only.
Molecular Profile
- Full name: Ala-Glu-Asp-Gly tetrapeptide
- Sequence: H-Ala-Glu-Asp-Gly-OH
- Molecular weight: 390.35 g/mol
- Form: Lyophilized powder (research grade)
- Stability: Store at −20°C; protect from light
- Solubility: Soluble in sterile water
As a tetrapeptide, Epithalon is among the smallest peptides studied in longevity research contexts, a property that has contributed to its interest as a research tool given its straightforward synthesis and characterization.
Mechanisms Studied in Preclinical Research
Telomerase activation research The most cited area of Epithalon research concerns telomerase activity. Telomerase is the enzyme responsible for maintaining telomere length — the protective caps on chromosomal DNA that shorten with each cell division. Studies published by Khavinson's group and collaborators have reported increased telomerase activity in human somatic cell cultures treated with Epithalon, with researchers investigating whether this relates to the regulation of telomere length over successive cell divisions.
Telomere length models Directly connected to telomerase research, several publications have examined telomere length in Epithalon-treated cell populations. In vitro studies using human fetal fibroblast cultures have reported extended replicative lifespan in treated populations, with telomere length measurements used as the primary outcome variable.
Pineal gland and melatonin research Epithalon's origin as a pineal gland extract analogue has motivated research into its effects on pineal function. Animal studies — primarily in aged rodents — have examined melatonin production, circadian rhythm markers, and pinealocyte morphology in treated subjects. Researchers have noted associations between Epithalon treatment and normalized melatonin secretion patterns in aged animal models.
Antioxidant pathway research Several publications have examined oxidative stress markers in Epithalon-treated animal models. Studies have reported associations with upregulation of antioxidant enzyme activity including superoxide dismutase (SOD) and catalase in treated subjects, which researchers have contextualized within broader longevity mechanism hypotheses.
Oncological models A portion of the Epithalon literature examines tumor incidence and growth in long-term rodent studies. Publications from the St. Petersburg group have reported reduced spontaneous tumor incidence in aged Epithalon-treated rodent cohorts compared to controls, a finding that has prompted mechanistic research into the relationship between telomere maintenance, cellular senescence, and oncogenesis.
Areas of Active Research
Cellular senescence models The relationship between telomere biology and cellular senescence has made Epithalon a compound of interest in aging cell biology research. Studies examining senescence-associated secretory phenotype (SASP) markers in Epithalon-treated cultures represent a more recent direction in the literature.
Circadian biology Given the pineal gland connection, research examining Epithalon in circadian disruption models has appeared in chronobiology literature, with aged animal models used to investigate light-dark cycle normalization parameters.
Retinal research A distinct but related body of research has examined Epithalon in retinal pigment epithelium models, motivated by the high concentration of Epithalamin-related peptides identified in ocular tissue research.
Key Published Research
- Khavinson VKh, et al. (2003). Epithalon peptide induces telomerase activity and telomere elongation in human somatic cells. Bulletin of Experimental Biology and Medicine, 135(6), 590–592.
- Anisimov VN, et al. (2003). Effect of Epitalon on biomarkers of aging, life span and spontaneous tumor incidence in female Swiss-derived SHR mice. Biogerontology, 4(4), 193–202.
- Khavinson V, et al. (2020). Peptide Regulation of Gene Expression and Protein Synthesis in Bronchial Epithelium.Lung, 198, 505–513.
- Kossoy G, et al. (2006). Effect of the synthetic pineal peptide epitalon on spontaneous carcinogenesis in female C3H/He mice. In Vivo, 20(2), 253–257.
Research Considerations
The published literature on Epithalon is heavily concentrated from a single research group (St. Petersburg Institute of Bioregulation and Gerontology), which researchers should factor into their evaluation of the evidence base. Independent replication of key findings — particularly telomerase activation results — remains limited, and this represents an important caveat when reviewing the literature.
The compound's small size and straightforward synthesis make purity verification particularly important, as synthetic impurities in tetrapeptides can be challenging to detect without rigorous HPLC analysis. Researchers should request batch-specific COA documentation confirming purity before experimental use.
NordBioLab supplies Epithalon as a research-grade lyophilized tetrapeptide with ≥98% purity (HPLC verified) and full COA documentation per batch.
View Epithalon in our catalog →
All products and information provided by NordBioLab are strictly for scientific research and laboratory use only. Not for human or veterinary consumption. This article does not constitute medical advice.