Epithalon: Pineal Tetrapeptide Research Overview

Epithalon was developed by Vladimir Khavinson and colleagues at the St. Petersburg Institute of Bioregulation and Gerontology. The compound was synthesized as a synthetic analog of a peptide fraction isolated from bovine pineal gland extracts (called epithalamin), with the goal of identifying the minimal active sequence within the broader extract.^[1]

The four amino acids in Epithalon (Ala-Glu-Asp-Gly) represent one of the smallest bioactive peptides studied in modern research. The compound has been the subject of an extensive Russian research program examining cellular aging models, gene expression, and downstream signaling.^[2]

Epithalon is studied as a research reference compound. It has not been approved by the FDA for any human therapeutic or medical purpose.

Epithalon structural features:

• Sequence: Ala-Glu-Asp-Gly (4 residues)

• Molecular formula: C₁₄H₂₂N₄O₉

• Molecular weight: approximately 390.35 Da

• N-terminus: free amine (no acetylation)

• C-terminus: free acid (no amidation)

Epithalon is among the smallest research peptides with reported biological activity. The four residues include two acidic (Glu, Asp) and one neutral polar (Ala) plus glycine — a chemically simple sequence. The small size simplifies synthesis, purification, and storage compared to larger peptides.^[2]

Synthetic Epithalon is produced by solid-phase peptide synthesis or solution-phase methods. The compound is stable as a lyophilized solid.

Epithalon's research-characterized mechanisms span several biological systems.

A defining body of Epithalon research examines the compound's effects on telomerase enzymatic activity in cell-based preparations. Telomerase extends telomere repeats at chromosome ends, and its activity is generally restricted in differentiated cells. Russian research has reported Epithalon-associated effects on telomerase activity in various cell systems.^[3]

Microarray and transcriptomic profiling of cells exposed to Epithalon has identified gene expression patterns. The proposed mechanism involves direct interaction of the tetrapeptide with DNA or chromatin-associated proteins, though detailed structural studies of this interaction remain limited.^[4]

Given Epithalon's origin from pineal extract, research has examined effects on melatonin synthesis and circadian-related signaling in preclinical preparations.^[5]

Epithalon literature spans several preclinical domains.

Senescence markers in cultured fibroblasts and other cell types have been examined following Epithalon exposure in preclinical preparations. Endpoints include beta-galactosidase senescence staining, proliferation markers, and telomere length measurements.^[3]

Russian research has examined Epithalon effects on lifespan in animal models. These long-duration studies are conducted entirely in rodent and other animal systems and do not extrapolate to humans.^[6]

Female rodent reproductive aging models have examined Epithalon effects on ovarian function markers and estrous cycle parameters.^[5]

Epithalon's small size and absence of complex modifications make it among the more stable research peptides.

Lyophilized Epithalon is stored at minus 20 degrees Celsius for long-term preservation. The compound is relatively forgiving of brief temperature excursions due to its simple structure.

Sterile water or bacteriostatic water are standard reconstitution solvents. The tetrapeptide dissolves cleanly in aqueous solution.

HPLC for purity, mass spectrometry for identity confirmation matching the tetrapeptide mass, and endotoxin screening. Each batch of Instant Peptides Epithalon ships with a full Certificate of Analysis.

Instant Peptides supplies Epithalon as a synthetic lyophilized reference compound in 10mg vials. Material is supplied to qualified research professionals. Not for human or animal consumption.

View the product page for current pricing and the Certificate of Analysis for the active batch.