A practical reference on Epithalamin: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-03-26 and is reviewed periodically as new material appears.
The published literature is dominated by a small number of research groups, much of it in Russian-language journals, and independent replication outside those groups is limited. Studies are typically small, use cultured cells or rodent models, and report endpoints that differ between papers, which makes comparison difficult. Large randomised human trials have not appeared in the indexed literature. Questions about absorption, distribution and clearance are therefore still treated as open in reviews that mention the compound.
Epitalon is a synthetic tetrapeptide with the sequence alanine–glutamate–aspartate–glycine, commonly abbreviated AEDG. Its design traces to epithalamin, a peptide fraction prepared from bovine pineal gland extracts that researchers in Saint Petersburg began investigating in the 1970s. The compound has a molecular formula of C14H22N4O9 and a nominal molecular mass near 390 daltons. It holds no approved drug status in the United States or the European Union, and material sold under this name is generally offered as a research chemical rather than a finished pharmaceutical product.
Reversed-phase high-performance liquid chromatography is the standard approach for assessing purity, usually with ultraviolet detection near 214 nm, where the peptide bond absorbs. Mass spectrometry, most often with electrospray ionization, confirms the molecular mass and helps reveal truncation or deletion byproducts. Amino acid analysis can verify composition, and counterion content is sometimes measured because peptides purified with trifluoroacetic acid retain variable amounts of that salt. Purity figures reported without a stated method and detection wavelength are difficult to interpret.
Material sold for research use varies widely in documented quality. A useful verification package includes a certificate of analysis that states peptide content rather than only net weight, the chromatographic method and column used, and a mass spectrum consistent with the expected mass. Independent testing by a third-party laboratory is occasionally reported. Statements of identity resting only on a supplier label provide little assurance, and the gap between nominal mass and actual peptide content can be substantial once counterions and residual water are counted.
Peptides of this size are generally stable as dry solids but degrade in solution over time. The principal routes are hydrolysis of the peptide backbone and oxidation, with hydrolysis favoured by elevated temperature and extreme pH. Aqueous solutions held at room temperature can show measurable loss of purity within days, while frozen aliquots are considerably more durable. Because the sequence contains neither cysteine nor methionine, oxidation is less of a concern than for many other peptides, but pH control during handling still matters.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C14H22N4O9 | Synthetic tetrapeptide, four residues |
| Nominal mass | Approximately 390 Da | Free peptide; salt forms differ |
| Appearance | White to off-white powder | Commonly supplied lyophilised |
| Solubility class | Freely soluble in water | Also dissolves in aqueous buffer |
| Typical storage | −20 °C, desiccated | Cold packs used during transport |
Published evidence comes mainly from Russian-language journals and from a single research group, with small sample sizes and limited independent replication. A few laboratories outside that group have examined related peptides and reported weaker or absent telomerase effects, so the central claim is best described as contested rather than settled. Rodent studies report modest changes in some ageing markers and in survival, but designs vary and control conditions are often sparse. No large randomised trial in humans has been published, and long-term safety data in healthy populations are correspondingly thin.
Epitalon is a synthetic tetrapeptide with the sequence alanine-glutamate-aspartate-glycine, commonly abbreviated AEDG. It was designed at the St. Petersburg Institute of Bioregulation and Gerontology as a short, chemically defined analogue of epithalamin, a fraction obtained from bovine pineal tissue. Small peptide bioregulators of this type formed a long-running line of work there from the 1980s onward. Because the molecule is produced by solid-phase synthesis rather than extraction, its composition is exact and its purity can be measured directly.
Verification of research-grade material involves comparing a supplier chromatogram against an in-house reference, checking the observed mass against the calculated value, and where possible confirming residue order by tandem mass spectrometry or enzymatic peptide mapping. Purity claims should be read alongside the method used to obtain them, because detection wavelength and integration settings alter the result. Batch-specific data, rather than a generic grade statement, is the informative part of a certificate.
Identity and purity of epitalon samples are normally established by reversed-phase high-performance liquid chromatography with ultraviolet detection near 214 nanometres, combined with mass spectrometry. The mass spectrum confirms the expected molecular ion and can reveal truncated or oxidised by-products. Amino acid analysis after acid hydrolysis verifies that the four residues are present in the expected ratio. Certificates typically report a purity figure taken from chromatographic peak area, expressed as a percentage of total integrated signal.
Reported biological findings come mainly from cell culture and rodent experiments. Those studies describe changes in telomerase catalytic subunit expression, melatonin rhythm amplitude, and antioxidant enzyme activity after peptide exposure. Human data are sparse and consist of small trials with limited blinding and inconsistent endpoints. The proposed mechanisms remain hypotheses rather than established facts, and there is no consensus on whether effects observed in animals carry over to people. Independent replication outside the original research groups is limited, which is a recognised gap in the published literature.
The parent extract epithalamin was characterised as a low-molecular-weight fraction of pineal tissue rather than a single defined chemical entity. Researchers fractionated it and tested successive fragments for activity, a screening approach typical of peptide discovery work in that era. Epitalon emerged from that process as one of the shorter sequences of interest. Because the original extract was never fully resolved into individual components, claims about which constituent drives a given effect rest on inference. This distinction matters when reading older reports that attribute extract observations to the tetrapeptide itself.
Epitalon is a synthetic tetrapeptide with the residue sequence alanine-glutamate-aspartate-glycine, commonly abbreviated AEDG. Its monoisotopic mass is approximately 390.35 daltons, and it is usually supplied as a lyophilised trifluoroacetate or acetate salt. The compound was derived from a pineal gland extract called epithalamin, a heterogeneous preparation investigated in the former Soviet Union. Researchers associated with the Saint Petersburg Institute of Bioregulation and Gerontology described the tetrapeptide as a constituent fragment of that extract. Commercial material is offered as a laboratory reagent rather than as a finished pharmaceutical product.
Another strategy for site-specific amine conjugation to proteins is to replace lysine residues with arginine residues (LDVs). If all lysines are depleted then the only remaining free amine is at the amino terminus (N-terminus) of the protein. In the case where the protein is an antibody Fc domain, a recombinant LDV Fc can still be purified using protein A. LDV Fc proteins fused with short peptide targeting sequences can be used to deliver conjugated payloads, including nanoparticles, to specific cell surface proteins. The majority of ADCs under development or in clinical trials are for oncological and hematological indications. This is primarily driven by the inventory of monoclonal antibodies, which target various types of cancer. However, some developers are looking to expand the application to other important disease areas.
Ca2+ + 2 HCO−3 → CaCO3↓ + CO2 + H2O At seawater pH, most of the dissolved CO2 is immediately converted back into HCO−3. The reaction results in a net transport of one molecule of CO2 from the ocean/atmosphere into the lithosphere. The result is that each Ca2+ ion released by chemical weathering ultimately removes one CO2 molecule from the surficial system (atmosphere, ocean, soil and living organisms), storing it in carbonate rocks where it is likely to stay for hundreds of millions of years. The weathering of calcium from rocks thus scrubs CO2 from the ocean and air, exerting a strong long-term effect on climate.
This rescheduling makes medical cannabis legal for medicinal use when dispensed by licensed dispensaries to individuals with a state issued medical marijuana card, including CBD derived from marijuana; once the broader rescheduling is complete, it should allow it to be prescribed by licensed physicians who are also licensed by the DEA to prescribe controlled substances. However, as cannabis is still a controlled substance, recreational use of cannabis-derived CBD with a THC concentration of >0.3% is still illegal under federal law.
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Sources: en.wikipedia.org
However, confirmation of the acyl enzyme was done without trapping experiments, making the conclusions weak. The second proposed mechanism is a promoted water pathway. This mechanism involves attack of a water molecule at the scissile peptide linkage of the substrate. This process is promoted by the zinc ion and assisted by residue Glu-270.
== Regulation == In the United States, the Food and Drug Administration ruled in 2015 that picamilon does not fit any of the dietary ingredient categories in the Dietary Supplement Health and Education Act of 1994, namely that it is not a vitamin; a dietary mineral; an herb or other botanical; an amino acid; a dietary substance for use by humans to supplement the diet by increasing the total dietary intake; or a concentrate, metabolite, constituent, extract, or combination of any ingredient described above that had been marketed in the United States before 1994. Despite the FDA ruling, picamilon remains an ingredient in supplements marketed as nootropics in the US.
Due to the potential for widespread usage and the evolving needs of researchers, many different mutants of GFP have been engineered. The first major improvement was a single point mutation (S65T) reported in 1995 in Nature by Roger Tsien. This mutation dramatically improved the spectral characteristics of GFP, resulting in increased fluorescence, photostability, and a shift of the major excitation peak to 488 nm, with the peak emission kept at 509 nm. This matched the spectral characteristics of commonly available FITC filter sets, increasing the practicality of use by the general researcher. A 37 °C folding efficiency (F64L) point mutant to this scaffold, yielding enhanced GFP (EGFP), was discovered in 1995 by the laboratories of Thastrup and Falkow. EGFP allowed the practical use of GFPs in mammalian cells. EGFP has an extinction coefficient (denoted ε) of 55,000 M−1cm−1. The fluorescence quantum yield (QY) of EGFP is 0.60. The relative brightness, expressed as ε•QY, is 33,000 M−1cm−1. The widely used EGFP sequence, however, may produce an unintended protein product, using the +2 frame as the template. Superfolder GFP (sfGFP), a series of mutations that allow GFP to rapidly fold and mature even when fused to poorly folding peptides, was reported in 2006. Many other mutations have been made, including color mutants; in particular, blue fluorescent protein (EBFP, EBFP2, Azurite, mKalama1), cyan fluorescent protein (ECFP, Cerulean, CyPet, mTurquoise2), and yellow fluorescent protein derivatives (YFP, Citrine, Venus, YPet).
=== Plasma in clinical diagnosis === Plasma contains an abundance of proteins many of which can be used as biomarkers, indicating the presence of certain diseases in an individual. Currently, 2D Electrophoresis is the primary method for discovery and detection of biomarkers in plasma. This involves the separation of plasma proteins on a gel by exploiting differences in their size and pI. Potential disease biomarkers may be present in plasma at very low concentrations, so, plasma samples must undergo preparation procedures for accurate results to be obtained using 2D Electrophoresis. These preparation procedures aim to remove contaminants that may interfere with detection of biomarkers, solubilize the proteins so they are able to undergo 2D Electrophoresis analysis, and prepare plasma with minimal loss of low concentration proteins, but optimal removal of high abundance proteins. The future of laboratory diagnostics are headed toward lab-on-a-chip technology, which will bring the laboratory to the point-of-care. This involves integration of all of the steps in the analytical process, from the initial removal of plasma from whole blood to the final analytical result, on a small microfluidic device. This is advantageous because it reduces turn around time, allows for the control of variables by automation, and removes the labor-intensive and sample wasting steps in current diagnostic processes.
=== El Mencho successor named === On 18 March 2026, the Wall Street Journal reported that a US Citizen named Juan Carlos Valencia González ("El Pelón"), who also uses the aliases "El Pelon," "El Tricky Tres," "03," "El 3," and "Pelacas," was now the CJNG's new leader. On 6 April 2026, El Pais would confirm that Valencia Gonzalez, El Mencho's stepson through his marriage to Rosalinda González Valencia, had successfully worked his way through the power vacuum created by El Mencho's death to succeed him as head of the CJNG as well. However, at the time of his capture in April 2026, it was acknowledged that CJNG second-in-command Audias Flores Silva ("El Jardinero") was making an effort to lead the organization as well.
Sources: en.wikipedia.org
== Bioinformatics == Owing to the increasing complexity of regulation of cellular processes and the roles proteases play in them, bioinformatics continues to be an invaluable tool for degradomics. Software, databases, and projects developed for this purpose have accompanied the advancement in technology. Software developed in the Overall Lab (CLIPPER) statistically evaluates cleavage site candidates determined by degradomic approaches. One web-based data site, WebPICS, incorporates and integrates cleavage site analysis from PICS experiments into MEROPS, the protease database. Another database, Termini oriented protein Function Inferred Database (TopFIND), serves as a knowledge base to integrate protein termini formed by protease processing with functional interpretations. By combining research literature and other biological databases including UniProt, MEROPS, Ensembl, and TisDB, the database comprehensively renders protein termini modifications accessible to a broad scientific community. Using TopFIND, terminal modifications can be identified and visualized across proteins thanks to all available in silico, in vitro, and in vivo findings. Using TopFINDer and Path FINDer software, research findings can be mathematically modelled into a network of pathways regulated by proteases, further contributing to the “protease web”.
Another 2015 meta-analysis found no association between lifetime cannabis use and risk of head or neck cancer. Combustion products are not present when using a vaporizer, consuming THC in pill form, or consuming cannabis foods. There is concern that cannabis may contribute to cardiovascular disease, but as of 2018, evidence of this relationship was unclear. Research in these events is complicated because cannabis is often used in conjunction with tobacco, and drugs such as alcohol and cocaine that are known to have cardiovascular risk factors. Smoking cannabis has also been shown to increase the risk of myocardial infarction by 4.8 times for the 60 minutes after consumption. There is preliminary evidence that cannabis interferes with the anticoagulant properties of prescription drugs used for treating blood clots. As of 2019, the mechanisms for the anti-inflammatory and possible pain relieving effects of cannabis were not defined, and there were no governmental regulatory approvals or clinical practices for use of cannabis as a drug.
Plant-based diet The plant-based diet is largely based on consumption of beans, grains, fruits, and vegetables and removal of meat, fish, and occasionally dairy and egg products from intake. In other words, fiber and unsaturated fat intake is increased and consumption of higher calorie meats and saturated fats is decreased. This diet has been shown to reduce BMI and introduce positive body composition changes when compared to a carnivore diet. Plant-based diets provide a lot of fiber in the meals which allows the body to lose weight and keep that weight off. Removing fried foods such as french fries, donuts, potato chips, and fried chicken, and sticking to an all plant-based diet comes with a lot of positive and healthy benefits.
==== Crown ether-type CSP ==== Crown ethers, like cyclodextrin-type CSPs contain a chiral cavity. Crown ethers are immobilized on the silica surface to form chiral stationary phase. Crown ethers contain oxygen atoms within the cavity. The cyclic structure that contains apolar ethylene groups between oxygen forms hydrophobic inner cavity. Cram et al., introduced CSP based on chiral crown ethers and accomplished separation of amino acid. The crucial chiral recognition principle underlying crown ether-based enantiomer separation is based on the formation of numerous hydrogen bonds between the protonated primary amino group of the analyte and the ether oxygens of the crown structure. This structural requirement confines the application of crown ether-type CSPs to chiral compounds having primary amino groups adjoining the chiral centers, such as amino acids, amino acid derivatives. Progress in the field of crown ether-type CSPs have been reviewed.
=== Vaccines === When pseudouridine is used in place of uridine in synthetic mRNA, the modified mRNA molecule arouses less response from Toll-like receptors, a part of the human immune system that would otherwise identify the mRNA as unwelcome. This makes pseudouridine useful in mRNA vaccines, including the mRNA COVID-19 vaccines. This property of pseudouridine was discovered by Katalin Karikó and Drew Weissman in 2005, for which they shared the 2023 Nobel Prize in Physiology or Medicine. N1-Methylpseudouridine provides even less innate immune response than Ψ, as well as improving translation capacity. Both Pfizer-BioNTech and Moderna mRNA vaccines therefore use N1-Methylpseudouridine rather than Ψ.
Sources: en.wikipedia.org
No. Epithalamin is a heterogeneous peptide fraction obtained from pineal gland extract and contains many components. Epitalon is a single synthetic tetrapeptide with the sequence Ala-Glu-Asp-Gly. Researchers synthesised the shorter peptide while attempting to identify active sequences within the extract.
No endogenous peptide with this exact sequence has been described as a circulating hormone or signalling molecule. The tetrapeptide was designed as a synthetic analogue based on fragments observed in pineal preparations. Any activity discussed in the literature therefore refers to administered material rather than to a natural pool of the compound.
It is not an approved medicine in major jurisdictions and does not appear in the major pharmacopoeias. Material is usually distributed as a research chemical or laboratory reagent. Such labelling places handling responsibility on the purchaser and does not indicate that a regulatory body has reviewed the substance.
The powder is normally kept at −20 °C or below in a sealed, moisture-protected container. Letting the vial reach room temperature before opening helps prevent condensation on the contents.