Epitalon is a synthetic tetrapeptide modeled after pineal gland bioregulators and evaluated in biomedical research for its role in cellular aging and gene expression. Designed exclusively for laboratory in vitro and animal studies, this compound serves as a reference molecule for telomere maintenance and circadian biology.
Epitalon is a synthetic tetrapeptide modeled after pineal gland bioregulators and evaluated in biomedical research for its role in cellular aging and gene expression. Designed exclusively for laboratory in vitro and animal studies, this compound serves as a reference molecule for telomere maintenance and circadian biology.
Epitalon (also known as Epithalon or Epithalon tetrapeptide, sequence Ala-Glu-Asp-Gly) is a synthetic tetrapeptide designed to mimic the bioactivity of epithalamin, an endogenous pineal gland extract. Classified as a peptide bioregulator, epitalon is studied in preclinical laboratory models for its ability to upregulate telomerase reverse transcriptase, preserve telomere architecture, and regulate neuroendocrine signaling.
Discovered during investigation into short-chain peptide bioregulators, the molecule exhibits selective gene-targeted interaction. In cell culture and animal models, researchers utilize high-purity epitalon to examine epigenetic modulation, pineal function restoration, and cellular lifespan extensions without observed oncogenic transformation in vitro. All data regarding this agent stem strictly from preclinical and laboratory-bound experimental frameworks.
Epitalon possesses the chemical structure L-alanyl-L-alpha-glutamyl-L-alpha-aspartyl-glycine with a formula of C14H22N4O9 and a molecular mass of approximately 390.35 g/mol. Its minimalist four-amino-acid chain represents the active short sequence identified within larger polypeptide fractions originally extracted from bovine epiphyseal tissue.
Because synthetic production allows for absolute control over sequence fidelity and elimination of animal-derived contaminants, modern research relies on solid-phase peptide synthesis (SPPS) to yield high-purity material. Investigators selecting bioregulators from our complete research peptides hub demand precise chemical identity to prevent confounding variable inclusion during sensitive genomic or transcriptomic assays.
The primary mechanism reported in preclinical epitalon literature centers on the transcriptional activation of the telomerase reverse transcriptase (TERT) gene. Telomerase is the ribonucleoprotein complex responsible for synthesizing repetitive TTAGGG nucleotide sequences onto the terminal ends of eukaryotic chromosomes, mitigating the end-replication problem inherent to DNA polymerase.
In vitro models utilizing human somatic fibroblasts demonstrate that exposure to epitalon induces TERT mRNA expression, leading to localized enzymatic assembly and measurable telomerase activity. Preclinical data indicate that this interaction involves site-specific binding to histone-wrapped promoter regions, facilitating chromatin remodeling that permits transcription factor access. Notably, this enzymatic activation occurs without triggering unconstrained cellular proliferation characteristic of neoplastic transformation.
Progressive telomere attrition serves as a critical biomarker of replicative senescence. As cultured somatic cells divide, critical shortening of chromosomal end-caps triggers a persistent DNA damage response (DDR), arresting the cell cycle at the G1/S checkpoint. Experimental studies evaluating epitalon in late-passage cell cultures demonstrate a significant delay in entry into the senescent phenotype.
By promoting telomere elongation or stabilizing short telomeres, epitalon allows cell lines to surpass the conventional Hayflick limit in laboratory settings. Quantitative PCR and fluorescence in situ hybridization (FISH) assays confirm that treated cultures retain elongated telomeres over extended passage numbers compared to untreated control cohorts, providing a robust model for investigating cellular longevity pathways in vitro.
Beyond chromosomal maintenance, epitalon demonstrates pronounced regulatory effects on the epiphyseal-pineal axis in animal models. The pineal gland plays a central role in synchronization of systemic circadian rhythms via the nocturnal secretion of melatonin. Pathological or age-associated pineal involution results in flattened circadian amplitude and dysregulated endocrine output.
In preclinical rodent and non-human primate studies, administration of epitalon restored nighttime melatonin synthesis, normalized hypothalamic sensitivity to feedback inhibition, and re-synchronized physiological circadian cycles. Researchers analyzing pineal tissue homogenates report up-regulated expression of tryptophan hydroxylase and serotonin N-acetyltransferase—the rate-limiting enzymes in the melatonin biosynthetic pathway.
To contextualize epitalon within broad anti-aging and metabolic inquiry, researchers frequently compare its mechanisms against other prominent research peptides. While epitalon acts primarily as a nuclear-targeted genomic bioregulator that upregulates TERT and stabilizes telomeric caps, alternative compounds target distinct cellular structures and metabolic nodes.
For instance, MOTS-c operates within the mitochondria to encode a peptide that regulates metabolic homeostasis and insulin sensitivity under cellular stress, whereas SS-31 selectively binds to cardiolipin in the inner mitochondrial membrane to prevent electron leak and reactive oxygen species (ROS) formation. Conversely, targeted senolytic peptides such as FOXO4-DRI induce apoptosis in existing senescent cells rather than extending the replicative capacity of healthy populations. Combining these distinct tools within preclinical research designs enables multi-target investigation of cellular degradation.
Epitalon is supplied as a lyophilized (freeze-dried) powder to maintain chemical stability during transport and storage. For laboratory experimentation, proper reconstitution using aseptic technique is essential to maintain reagent integrity and prevent enzymatic degradation.
Researchers should reconstitute epitalon using sterile bacteriostatic water (0.9% benzyl alcohol) or sterile phosphate-buffered saline (PBS, pH 7.4), depending on the requirements of the downstream assay. Solvent should be introduced along the glass vial wall rather than directly onto the cake, followed by gentle swirling. Vigorous shaking or high-shear vortexing must be avoided to prevent mechanical denaturation of the peptide backbone. Reconstituted aliquots intended for cell culture assays must be handled within laminar flow hoods to maintain sterility.
Rigorous quantitative characterization is critical when selecting research reagents, as chemical impurities or biological endotoxins can skew cellular responses and compromise experimental reproducibility. PX1 Research subjects every batch of synthetic peptides to rigorous analytical evaluation prior to release.
Purity is quantified using Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC), ensuring a minimum purity standard of 98.0%. Molecular mass and sequence identity are confirmed via Electrospray Ionization Mass Spectrometry (ESI-MS). Furthermore, because bacterial lipopolysaccharides (LPS) can stimulate unwanted inflammatory signaling in immune cell cultures, every lot undergoes Chromogenic LAL (Limulus Amebocyte Lysate) testing to verify endotoxin levels remain below 0.5 EU/mg. Access comprehensive documentation through our institutional supply resources.
Lyophilized epitalon exhibits high thermal stability when stored under proper conditions. Upon receipt, unopened vials should be stored in a freezer at -20°C for short-to-medium term storage, or -80°C for extended archival preservation. Under these conditions, the lyophilized peptide remains stable for up to 24 months without significant degradation.
Following reconstitution, liquid aliquots should be used immediately or divided into single-use working volumes to prevent repeated freeze-thaw cycles, which induce peptide aggregation. Reconstituted solutions dissolved in sterile bacteriostatic water remain stable at 2°C to 8°C for up to 28 days, whereas solutions prepared in plain sterile water or PBS should be used within 24 to 48 hours.
PX1 Research operates as a trusted USA-based supplier of high-grade research chemicals, adhering strictly to ISO 17025 accredited laboratory testing standards and Good Manufacturing Practice (GMP) principles. We produce pure research compounds explicitly designated for in vitro and preclinical laboratory research use only.
Every shipment originates from our CA or AZ facilities, featuring same-day dispatch for orders finalized before cut-off times. Institutional researchers benefit from full lot traceability and transparent, batch-specific Certificates of Analysis (COA) containing raw HPLC chromatograms and mass spectra. We maintain absolute compliance with federal standards, guaranteeing uncompromised purity for institutional research environments.
What is Epitalon's chemical structure and amino acid sequence?
Epitalon is a synthetic tetrapeptide with the amino acid sequence Ala-Glu-Asp-Gly (L-alanyl-L-alpha-glutamyl-L-alpha-aspartyl-glycine). It has a molecular weight of approximately 390.35 g/mol.
How does Epitalon differ from crude pineal Epithalamin extract?
Epithalamin is a crude biological extract obtained from bovine pineal glands containing a complex mixture of peptides and proteins. Epitalon is a synthesized four-amino-acid peptide that represents the specific active sequences isolated from epithalamin, offering absolute batch-to-batch consistency and freedom from biological contaminants.
What primary end-points are measured in preclinical Epitalon studies?
Researchers typically measure TERT gene transcription rates via RT-qPCR, telomerase catalytic activity via TRAP (Telomeric Repeat Amplification Protocol) assays, telomere length via quantitative FISH, cellular senescence markers (such as beta-galactosidase activity), and melatonin secretion kinetics in pineal explant or animal models.
What solvent is recommended for reconstituting Epitalon for cell culture work?
For in vitro cell culture studies, sterile non-preserved Phosphate-Buffered Saline (PBS, pH 7.4) or sterile water for injection is recommended to avoid vehicle toxicity. For longer-term storage of working stock solutions, sterile bacteriostatic water (0.9% benzyl alcohol) is typically utilized.
What are the acceptable endotoxin limits for PX1 Research Epitalon?
PX1 Research subjects every lot of Epitalon to kinetic chromogenic LAL testing, enforcing a strict maximum threshold of <0.5 EU/mg to prevent endotoxin-induced background activation in sensitive cell lines.
Can Epitalon be combined with other bioregulators in experimental designs?
Yes. In preclinical longevity frameworks, researchers frequently compare or combine Epitalon with pineal or organ-specific bioregulators (such as Thymalin) or metabolic peptides (such as MOTS-c) to assess multi-system cellular responses in vitro.
Is Epitalon suitable for human clinical use or dietary supplementation?
No. Epitalon supplied by PX1 Research is strictly designated for laboratory research use only, including in vitro cell culture experiments and preclinical animal studies. It is not approved for human consumption, clinical treatment, or diagnostic applications.
All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.