pineal peptides is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Updated 2026-07-02. Numbers and descriptions here follow the published literature rather than marketing material.
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.
The most frequently cited proposed action is induction of telomerase, the enzyme that adds repeat sequences to chromosome ends. Cell-culture work from the originating group reported higher telomerase reverse transcriptase expression and measurable telomere elongation in human somatic cells after exposure. How a four-residue peptide would reach nuclear gene regulation is not established, and no cell-surface receptor or uptake route has been identified. Additional reports describe changes in melatonin secretion, antioxidant enzyme activity and lipid peroxidation in aged animals, but these findings remain mechanistically unconnected to the telomerase observation.
The peptide is a synthetic analogue of epithalamin, a preparation extracted from bovine pineal glands. Investigators sought a short, chemically defined molecule that would reproduce some of the endocrine and gerontological observations attributed to the glandular extract. Proposed mechanisms centre on induction of telomerase activity, an effect reported in cultured human somatic cells in the early 2000s, together with influences on melatonin secretion and neuroendocrine regulation. Those mechanisms remain incompletely characterised, and the reported telomerase response has not been consistently reproduced by independent groups working in comparable systems.
Published work on this compound consists mainly of in vitro experiments, animal studies, and small clinical investigations, a substantial share of which appeared in Russian-language journals. Sample sizes are generally small, control conditions differ between studies, and several endpoints rely on markers whose clinical meaning is itself debated. Reviews of the longevity field treat the peptide as an early example of telomerase-directed research rather than an established intervention. Regulatory treatment varies by country: some jurisdictions place it under prescription controls, others treat it as a laboratory material, and importation may be restricted regardless of local status.
Epitalon is a synthetic tetrapeptide whose sequence is alanine–glutamate–aspartate–glycine, commonly abbreviated AEDG. It was developed in Russia during the 1980s and 1990s by investigators associated with the St. Petersburg Institute of Bioregulation and Gerontology, who studied short peptides as regulators of gene expression and tissue function. The alternative spelling epithalon appears interchangeably in the literature, and the two names refer to the same molecule. Outside Russia it is encountered chiefly as a research chemical rather than a licensed medicine, and it holds no approval from the United States Food and Drug Administration or the European Medicines Agency.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C14H22N4O9 | Calculated from the four residues with three water losses |
| Molecular mass | About 390.35 g/mol | Monoisotopic mass near 390.14, used for mass-spectrometric identification |
| Peptide sequence | Ala-Glu-Asp-Gly | Single-letter form AEDG; no disulfide bonds or modified residues |
| Appearance | White to off-white solid | Supplied as a dried powder |
| Isoelectric point | Around 4 | Estimated from aspartate and glutamate side-chain pKa values |
（TG:@pojiaai）Epitalon is a synthetic linear tetrapeptide with the sequence alanine-glutamate-aspartate-glycine, abbreviated AEDG. It emerged from work on epithalamin, a peptide fraction prepared from bovine pineal tissue, and was designed as a short, chemically defined analogue of that extract. Early publications came mainly from Russian laboratories studying pineal peptides and aging-related endpoints. The compound appears in the literature under several spellings, including epithalon and epithalone, which complicates systematic searching. Its small size makes solid-phase assembly and routine analytical characterization straightforward.
Chemically, the molecule consists of four amino acid residues joined by three peptide bonds, with a free N-terminal amino group and a free C-terminal carboxyl group. Its molecular formula is C14H22N4O9, and its monoisotopic mass is approximately 390 daltons. The acidic glutamate and aspartate side chains give the peptide a net negative charge near neutral pH, a property that shapes its chromatographic behaviour and solubility profile. No disulfide bridges or other post-translational modifications are present, so the primary sequence alone defines the structure.
The compound is generally presented as a synthetic fragment of epithalamin, a pineal gland extract investigated in the former Soviet Union from the 1970s onward. Vladimir Khavinson and colleagues in Saint Petersburg developed short peptides modelled on such extracts, and epitalon became the most widely cited of those sequences. Most primary reports appeared in Russian-language journals or in proceedings with limited international circulation. Independent replication in laboratories outside that network remains sparse, and much repeated secondary material traces back to a small number of originating groups.
Laboratory work has examined effects on telomerase activity in cultured cells, on melatonin rhythms in animals, and on markers of oxidative stress. Some experiments report measurable changes while others show none, and the reported findings rest largely on small studies. The absence of large independent trials means the generality of these results is unresolved rather than settled. Review articles occasionally apply the label geroprotector, a term that reflects a research hypothesis about ageing rather than an established clinical finding.
In its supplied form epitalon is a white to off-white powder, usually lyophilized and often hygroscopic. It dissolves readily in water and in aqueous buffers, and it is commonly handled as the acetate or trifluoroacetate salt to improve stability during purification and drying. The amide backbone is labile in aqueous media, so solutions are less durable than the dry solid. Handling notes in the chemical literature therefore emphasize keeping the powder dry, cool and shielded from light until it is dissolved.
Epitalon is a synthetic tetrapeptide whose sequence is alanine-glutamate-aspartate-glycine, written in single-letter code as AEDG. The four residues are joined by three peptide bonds, giving a linear backbone with no branching and no disulfide bridges. Its calculated molecular mass for the free form is approximately 390.3 daltons, a figure that rises when the compound is supplied as an acetate or trifluoroacetate salt. Because the chain is short, the molecule is defined entirely by its residue order rather than by any folded three-dimensional structure.
Interest in epitalon is usually discussed within the broader field of short peptide bioregulators, a category that includes other synthetic di-, tri-, and tetrapeptides studied by the same research group. These compounds share a common rationale: that small fragments of tissue-derived proteins can retain biological activity and can be produced reproducibly. The category as a whole remains outside mainstream pharmacological consensus, and epitalon specifically has a limited presence in independent, non-Russian research literature, which shapes how its evidence base is described.
Epitalon is a synthetic tetrapeptide with the amino acid sequence alanine-glutamate-aspartate-glycine, abbreviated Ala-Glu-Asp-Gly or AEDG. It was developed by the Russian researcher Vladimir Khavinson and colleagues during work on peptide bioregulators derived from the pineal gland. The compound is short enough to be produced by standard solid-phase peptide synthesis and is typically handled as a lyophilized white powder. Its small size distinguishes it from larger pineal peptides such as epithalamin, a complex extract from which the tetrapeptide was conceptually derived.
Valve is the main developer and publisher of the single-player Half-Life and Portal games and the multiplayer games Counter-Strike, Team Fortress 2, Dota 2, Day of Defeat, and Artifact. Valve also published the multiplayer game Left 4 Dead and developed and published Left 4 Dead 2. Unreleased and canceled Valve games include the fantasy role-playing game Prospero and numerous Half-Life projects, including Episode Three. Valve worked with Arkane Studios on The Crossing, which was canceled in May 2009. Valve video games are noted for their technical and artistic innovation, with virtually every mainline release from the studio receiving mention among the greatest video games of all time.
The palate is hard at the front of the mouth since the overlying mucosa is covering a plate of bone; it is softer and more pliable at the back being made of muscle and connective tissue, and it can move to swallow food and liquids. The soft palate ends at the uvula. The surface of the hard palate allows for the pressure needed in eating food, to leave the nasal passage clear. The opening between the lips is termed the oral fissure, and the opening into the throat is called the fauces. At either side of the soft palate are the palatoglossus muscles which also reach into regions of the tongue. These muscles raise the back of the tongue and also close both sides of the fauces to enable food to be swallowed. Mucus helps in the mastication of food in its ability to soften and collect the food in the formation of the bolus.
Some organizations hold proceedings before tribunals relating to their organization to be confidential, and in some instances have threatened disciplinary action should an employee disclose any of the relevant information. Such confidentiality has been criticized as a lack of transparency. The immunities also extend to employment law. In this regard, immunity from national jurisdiction necessitates that reasonable alternative means are available to effectively protect employees' rights; in this context, a first instance Dutch court considered an estimated duration of proceedings before the Administrative Tribunal of the International Labour Organization of 15 years to be too long. An international organization does not pay taxes, is difficult to prosecute in court and is not obliged to provide information to any parliament.
Division 1. Order Lepisosteiformes – the relict gars, which include extant species of gars that first appeared in the Cretaceous Division 2. Order Amiiformes – the relict bowfin, (halecomorphids), the only extant species in the order Amiiformes, which date back to the Triassic period Division 3. Division Teleostei – the stem group of Teleostei from which modern fish arose, including most of the bony fish familiar today
Sources: en.wikipedia.org
=== Cited texts === Dhillon, Karminder Singh (2009). Malaysian Foreign Policy in the Mahathir Era 1981–2003: Dilemmas of Development. NUS Press. ISBN 978-9971-69-399-2. Milne, R. S.; Mauzy, Diane K. (1999). Malaysian Politics under Mahathir. Routledge. ISBN 0-415-17143-1. Morais, J. Victor (1982). Mahathir: A Profile in Courage. Eastern Universities Press. OCLC 8687329. Sankaran, Ramanathan; Mohd Hamdan Adnan (1988). Malaysia's 1986 General Election: the Urban-Rural Dichotomy. Institute of Southeast Asian Studies. ISBN 981-3035-12-9. Stewart, Ian (2003). The Mahathir Legacy: a Nation Divided, a Region at Risk. Allen & Unwin. ISBN 1-86508-977-X. Wain, Barry (2010). Malaysian Maverick: Mahathir Mohamad in Turbulent Times. Palgrave Macmillan. ISBN 978-0-230-23873-2. James Chin & Joern Dosch. Malaysia Post Mahathir: a decade of change?. Marshall Cavendish. 2016. ISBN 9814677558
=== Carcinogenicity === BaP's metabolites are mutagenic and highly carcinogenic, and it is listed as a Group 1 carcinogen by the IARC. Chemical agents and related occupations, Volume 10, A review of Human Carcinogens, IARC Monographs, Lyon France 2009 In June 2016, BaP was added as benzo[def]chrysene to the REACH Candidate List of Substances of very high concern for Authorisation. Numerous studies since the 1970s have documented links between BaP and cancers. It has been more difficult to link cancers to specific BaP sources, especially in humans, and difficult to quantify risks posed by various methods of exposure (inhalation or ingestion). A link between vitamin A deficiency and emphysema in smokers was described in 2005 to be due to BaP, which induces vitamin A deficiency in rats. A 1996 study provided molecular evidence linking components in tobacco smoke to lung cancer. BaP was shown to cause genetic damage in lung cells that was identical to the damage observed in the DNA of most malignant lung tumours. Regular consumption of cooked meats has been epidemiologically associated with increased levels of colon cancer (although this in itself does not prove carcinogenicity), A 2005 NCI study found an increased risk of colorectal adenomas was associated with BaP intake, and more strongly with BaP intake from all foods. The detoxification enzymes cytochrome P450 1A1 (CYP1A1) and cytochrome P450 1B1 (CYP1B1) are both protective and necessary for benzo[a]pyrene toxicity.
Gene Expression Omnibus (GEO) A database of high-throughput functional genomics and gene expression data derived from experimental assays and next-generation sequencing and managed by the National Center for Biotechnology Information.
CASP, which stands for Critical Assessment of Techniques for Protein Structure Prediction, is a community-wide experiment for protein structure prediction taking place every two years since 1994. CASP provides with an opportunity to assess the quality of available human, non-automated methodology (human category) and automatic servers for protein structure prediction (server category, introduced in the CASP7). The CAMEO3D Continuous Automated Model EvaluatiOn Server evaluates automated protein structure prediction servers on a weekly basis using blind predictions for newly release protein structures. CAMEO publishes the results on its website.
In 2015, the Department of Defense released an updated cyber strategy memorandum detailing the present and future tactics deployed in the service of defense against cyberwarfare. In this memorandum, three cybermissions are laid out. The first cybermission seeks to arm and maintain existing capabilities in the area of cyberspace, the second cybermission focuses on prevention of cyberwarfare, and the third cybermission includes strategies for retaliation and preemption (as distinguished from prevention). One of the hardest issues in cyber counterintelligence is the problem of cyber attribution. Unlike conventional warfare, figuring out who is behind an attack can be very difficult.
Sources: en.wikipedia.org
=== Mic–Mu === Leonor Michaelis (1875–1949). German biochemist at the Rockefeller Institute of Medical Research, known for early work on enzyme kinetics. He developed biochemistry in Japan. He studied quinones, and used this knowledge to develop a method for producing a perm (hairstyle). Friedrich Miescher (1844–1895). Swiss physician and biologist at Leipzig University, the first to isolate DNA. Kenneth R. Miller (born 1948), American evolutionary biologist and author of Finding Darwin's God César Milstein FRS (1927–2002). Argentinian-British biochemist at the University of Cambridge, known for developing the use of monoclonal antibodies. Nobel Prize in Physiology or Medicine (1984). Foreign associate Natl. Acad. Sci. USA. María Teresa Miras Portugal (1948–2021), Spanish biochemist, pharmacist and molecular biologist. Peter D. Mitchell FRS (1920–1992). British biochemist at Glynn Research, known for the theory of chemiosmosis. Nobel Prize in Chemistry (1978). Foreign associate Natl. Acad. Sci. USA. John Keith Moffat (b. 1943), British biophysicist at Argonne National Laboratory known for work on time-resolved crystallography. Catherine Anne Money (b. 1940), Australian biochemist known for revolutionizing leather production Jacques Monod FRS (foreign member) (1910–1976). French biochemist and microbiologist at the Pasteur Institute, known for many discoveries and for the theory of allostery. His philosophical book Chance and Necessity has been influential. Nobel Prize in Physiology or Medicine (1965).
== Applications == Ranganathan and Lockless originally developed SCA to examine thermodynamic (energetic) coupling of residue pairs in proteins. Using the PDZ domain family, they were able to identify a small network of residues that were energetically coupled to a binding site residue. The network consisted of both residues spatially close to the binding site in the tertiary fold, called contact pairs, and more distant residues that participate in longer-range energetic interactions. Later applications of SCA by the Ranganathan group on the GPCR, serine protease and hemoglobin families also showed energetic coupling in sparse networks of residues that cooperate in allosteric communication. Statistical coupling analysis has also been used as a basis for computational protein design. In 2005, Socolich et al. used an SCA for the WW domain to create artificial proteins with similar thermodynamic stability and structure to natural WW domains. The fact that 12 out of the 43 designed proteins with the same SCA profile as natural WW domains properly folded provided strong evidence that little information—only coupling information—was required for specifying the protein fold. This support for the SCA hypothesis was made more compelling considering that a) the successfully folded proteins had only 36% average sequence identity to natural WW folds, and b) none of the artificial proteins designed without coupling information folded properly.
Heart Beat is an Indian Tamil-language medical drama series starring Deepa Balu in the leading titular role, alongside Anumol, Karthik Kumar, Charukesh M, Ashwathy Agnihothri, Sabareesh and others. The series is written by Deepak Sundarrajan and directed by Deepak Sundarrajan, Adbul Kabeez and Chidambaram Manivannan for JioHotstar. The series is similar to the popular US drama series, New Amsterdam and Grey's Anatomy. It focuses on the personal and professional lives of surgical interns, residents, and attendings at the fictional RK Multispeciality Hospitals. It premiered on JioHotstar on 8 March 2024 and also dubbed simultaneously in Telugu, Kannada, Malayalam and Hindi languages. The first season of the series premiered on 8 March 2024 and ended on 23 August 2024 with 100 episodes. It also aired on Star Vijay from 24 November 2024 on every Sunday. The second season of this series has started premiering from 22 May 2025 and ended on 6 November 2025. The third season of this series premiered on 30 July 2026.
Julia Nickson is a film actress. She first came to the attention of worldwide audiences in the 1985 action film Rambo: First Blood Part II, starring Sylvester Stallone. She also appeared in the 2004 film Ethan Mao and in the 2008 independent film Half-Life.
Sources: en.wikipedia.org
No. Epithalamin is a peptide-containing extract of bovine pineal glands, while epitalon is a single synthetic tetrapeptide. The extract contains many peptides and other tissue components, so its composition varies between batches in ways that a synthesised sequence does not.
It is not recognised as an endogenous peptide hormone. The four-residue sequence can appear inside larger proteins and in digestive fragments of dietary protein, but no dedicated pathway producing it as a signalling molecule has been identified.
Several cell-culture reports describe increased telomerase activity after treatment, measured by enzyme assays or by transcript levels. Results differ between cell types and laboratories, and measured telomere lengthening has been reported in some studies but not in others, which leaves the physiological relevance open.
Epitalon is a synthetic four-amino-acid peptide with the sequence alanine–glutamate–aspartate–glycine, also written AEDG. It was developed in Russian gerontology research and is studied for proposed effects on telomerase, melatonin regulation, and neuroendocrine function. It is not an approved pharmaceutical in the United States or the European Union.