A practical reference on epithalamin: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2025-11-18. Anything still debated is marked as such rather than presented as settled.
Literature searches for this compound must account for several spelling variants. Indexing databases contain epitalon, epithalon, epithalone, and AEDG, and relevant records are scattered across Russian-language and English-language journals that do not consistently cross-cite. Early publications describe the parent extract as a mixture of many peptides, whereas later work addresses the single synthetic tetrapeptide. That shift in nomenclature complicates comparison between studies, because extract data and tetrapeptide data are sometimes cited interchangeably. A search strategy omitting the alternate spellings will return an incomplete set of references.
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.
Most experimental work has been carried out in cell culture and animal models. Several reports describe changes in telomerase activity and proliferation in cultured cells, while rodent studies have examined lifespan, melatonin rhythm and reproductive endpoints. Human data remain limited, and much of the published clinical material consists of small trials with incomplete reporting of methods and controls. Whether the cell and animal findings translate into measurable effects in people is an open question, and the mechanistic basis of the reported telomerase changes is not fully established.
Discussions in the literature often conflate three distinct entities: the pineal extract epithalamin, the isolated tetrapeptide AEDG, and commercial preparations sold under similar names. Reviews citing older Russian-language studies sometimes omit detail on purity, route of administration and control groups, which makes cross-study comparison difficult. Researchers working with the compound generally note the need for independent replication, standardized enzyme assays, and clearer reporting of peptide identity. These caveats are relevant when weighing claims that appear in secondary sources rather than in primary reports.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic tetrapeptide | Four amino acid residues |
| Residue sequence | Ala-Glu-Asp-Gly | Abbreviated AEDG |
| Approximate mass | 390.35 Da | Monoisotopic, free base form |
| Parent preparation | Epithalamin extract | Derived from pineal tissue |
| Common spelling variants | Epithalon, epithalone, AEDG | Affects literature retrieval |
Residue composition is the property that most cleanly separates verified material from mislabelled samples. Alanine, glutamate, aspartate and glycine appear in that order from the N-terminus, and the two acidic residues sit in the middle of the chain. Because the peptide is short, it can be produced by solid-phase synthesis and characterised by mass spectrometry without ambiguity. Any reported sample whose measured mass departs substantially from 390 daltons is a different compound or a degraded mixture rather than epitalon.
Epitalon is a synthetic tetrapeptide whose four residues are alanine, glutamate, aspartate and glycine, commonly abbreviated AEDG. Its molecular formula is C14H22N4O9 and its monoisotopic mass is near 390.35 daltons. The peptide carries two acidic side chains, so it is neutral to negatively charged in most aqueous buffers. Published reference summaries usually list it under both spellings, epitalon and epithalon, and treat the two names as the same material.
The compound is generally described as a synthetic analogue of a fragment isolated from a pineal gland extract. Researchers associated with the Saint Petersburg Institute of Bioregulation and Gerontology introduced it during the 1980s and 1990s while studying short peptides from animal tissue. The original extract, called epithalamin, is a heterogeneous mixture, whereas epitalon is a single defined sequence. That distinction matters because findings reported for the extract are not automatically findings about the pure tetrapeptide, and claims about broader biological effects remain a separate question from the chemical identity described here.
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.
Epitalon is the common name for a synthetic tetrapeptide with the sequence alanine-glutamate-aspartate-glycine, usually abbreviated AEDG. All four residues are proteinogenic amino acids, and the free peptide has a calculated mass near 390 grams per mole. Because the chain is short and carries no modifications, it is assembled readily by solid-phase synthesis and is distributed mainly as a freeze-dried solid for laboratory work. Catalogue listings use the spellings epitalon, epithalone, and simply AEDG, and the three refer to the same sequence.
Most neptunium (and plutonium) now encountered in the environment is due to atmospheric nuclear explosions that took place between the detonation of the first atomic bomb in 1945 and the ratification of the Partial Nuclear Test Ban Treaty in 1963. The total amount of neptunium released by these explosions and the few atmospheric tests that have been carried out since 1963 is estimated to be around 2500 kg. The overwhelming majority of this is composed of the long-lived isotopes 236Np and 237Np since even the moderately long-lived 235Np (half-life 396 days) would have decayed to less than one-billionth (10−9) its original concentration over the intervening decades. An additional very small amount of neptunium, produced by neutron irradiation of natural uranium in nuclear reactor cooling water, is released when the water is discharged into rivers or lakes. The concentration of 237Np in seawater is approximately 6.5 × 10−5 millibecquerels per liter: this concentration is between 0.1% and 1% that of plutonium. Once released in the surface environment, in contact with atmospheric oxygen, neptunium generally oxidizes fairly quickly, usually to the +4 or +5 state. Regardless of its oxidation state, the element exhibits much greater mobility than the other actinides, largely due to its ability to readily form aqueous solutions with various other elements. In one study comparing the diffusion rates of neptunium(V), plutonium(IV), and americium(III) in sandstone and limestone, neptunium penetrated more than ten times as well as the other elements.
== Abuse == The abuse of exogenous insulin carries with it an attendant risk of hypoglycemic coma and death when the amount used is in excess of that required to handle ingested carbohydrate. Acute risks include brain damage, paralysis, and death. Symptoms may include dizziness, weakness, trembling, palpitations, seizures, confusion, headache, drowsiness, coma, diaphoresis and nausea. All persons with overdoses should be referred for medical assessment and treatment, which may last for hours or days. Data from the US National Poison Data System (2013) indicates that 89.3% of insulin cases reported to poison centers are unintentional, as a result of therapeutic error. Another 10% of cases are intentional, and may reflect attempted suicide, abuse, criminal intent, secondary gain or other unknown reasons. Hypoglycemia that has been induced by exogenous insulin can be chemically detected by examining the ratio of insulin to C-peptide in peripheral circulation. It has been suggested that this type of approach could be used to detect exogenous insulin abuse by athletes.
==== October-November 2008 ==== In October 2008, Duel reported that soldier Maksim Pasko, who died near Gori on 12 August, had sent several SMSes. One SMS was sent on 3 August 2008 and said: "Don't worry too much, the Georgian militants are battering Tskhinvali. We were given orders to go there." Another SMS, sent on 5 August 2008, said: "Yesterday, our artillerists were messing with Georgia. 22 were killed and 150 injured." It was also reported that Russian military transport aircraft and attack helicopters began flying in the airspace of Abkhazia since 5 August 2008. Maksim Pasko had served in the 693rd Regiment. In October 2008, Russian military officer told Zavtra that at about 03:00 AM on 8 August, his division commander called him. He also said, "We took prisoners and they told us that after our break and the battle at a military base, a rumor spread that two Russian divisions had invaded Georgia and were sweeping everything in their path, and were slaughtering everyone without mercy." In October 2008, Sovershenno Sekretno newspaper reported that the 135th Motorized Rifle Regiment of the 58th Army received the order to move towards Tskhinvali a few hours before the Georgian attack.
=== Metastasis === CAF have been found to promote tumour metastasis in numerous ways. Firstly, they may alter gene expression and have been found to upregulate specific genes involved in pro-tumorigenic pathways including heat shock factor 1 (HSF1). They can also interfere with the function of tumour suppressor genes, such as Tumour protein p53, leading to higher rates of cell proliferation due to the loss of control of the cell cycle. Additionally, CAF have the ability to break down proteins in the extracellular matrix and basement membranes leading to disruption to the normal structure allowing cells to move away from their primary region. The group of proteins known as the matrix metalloproteinases are key to this process. CAF also direct the movement of neoplastic cells by using the Rho-dependent signaling pathway to create tracks for these cells in the matrix.
Sources: en.wikipedia.org
Opportunism is also a key factor – the organized criminal or criminal group is likely to frequently reorder the criminal associations they maintain, the types of crimes they perpetrate, and how they function in the public arena (recruitment, reputation, etc.) in order to ensure efficiency, capitalization and protection of their interests.
ATC code G04 Urologicals is a therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System, a system of alphanumeric codes developed by the World Health Organization (WHO) for the classification of drugs and other medical products. Subgroup G04 is part of the anatomical group G Genito-urinary system and sex hormones. Codes for veterinary use (ATCvet codes) can be created by placing the letter Q in front of the human ATC code: for example, QG04. ATCvet codes without corresponding human ATC codes are cited with the leading Q in the following list.National versions of the ATC classification may include additional codes not present in this list, which follows the WHO version.
Robert Heller was brought in as the first editor of what became Management Today – Heseltine initially irritated him by taking him to lunch at the Carlton Club and talking of his political aspirations, but Heller soon recognised that Labovitch was the front man whose job was to impress those who needed to be impressed, and Heseltine was "the dynamic and real entrepreneurial brain". The first edition came out in April 1966, just after Heseltine's election to Parliament. Haymarket went on to publish similar magazines for Marketing, Personnel Management and Computing Institutes. Labovitch left Haymarket at the end of 1965. Heseltine stated he spent three days trying to persuade him to stay. Labovitch wanted to establish himself as a successful educational and careers publisher, and may well have been pushed by his then wife, the socialist journalist Penny Perrick, who disliked Heseltine both personally (as best man at their wedding he had, she said, welcomed various business figures in his speech as if he were at a board meeting) and politically and whom he had refused to include on the Haymarket board. Labovitch was a generator of ideas but he lacked Heseltine's business skills. Although he took his profitable Directories with him, he had to sell them back to Haymarket when his business failed in 1973, causing him to attempt suicide. Heseltine offered him a position as consultant to Haymarket. The two former partners remained on friendly terms until Labovitch's death in 1994. Very few staff left with Labovitch.
Malaysia is a federal constitutional elective monarchy and the only federal country in Southeast Asia. The system of government is closely modelled on the Westminster parliamentary system, a legacy of British rule. The head of state is the King, whose official title is the Yang di-Pertuan Agong. The King is elected to a five-year term by and from among the nine hereditary rulers of the Malay states. The other four states, which have titular Governors, do not participate in the selection. By informal agreement the position is rotated among the nine, and has been held by Ibrahim Iskandar of Johor since 31 January 2024. The King's role has been largely ceremonial since changes to the constitution in 1994, picking ministers and members of the upper house. Legislative power is divided between federal and state legislatures. The bicameral federal parliament consists of the lower house, the House of Representatives and the upper house, the Senate. The 222-member House of Representatives is elected for a maximum term of five years from single-member constituencies. All 70 senators sit for three-year terms; 26 are elected by the 13 state assemblies, and the remaining 44 are appointed by the King upon the Prime Minister's recommendation. The parliament follows a multi-party system and the government is elected through a first-past-the-post system. Parliamentary elections are held at least once every five years.
== Occurrence == Quercetin is a flavonoid widely distributed in nature. The name has been used since 1857, and is derived from quercetum (oak forest), after the oak genus Quercus. It is a naturally occurring polar auxin transport inhibitor. Quercetin is one of the most abundant dietary flavonoids, with an average daily consumption of 25–50 mg.
Sources: en.wikipedia.org
It is based on epithalamin, a peptide-rich preparation obtained from pineal gland tissue and studied in the former Soviet Union. Researchers later identified the tetrapeptide AEDG as a constituent fragment of that material. Modern supplies are produced by chemical synthesis rather than tissue extraction.
No. Epithalamin is a heterogeneous extract containing many peptides, while epitalon is a single synthesised tetrapeptide. Publications sometimes treat findings from the two as equivalent, which is a common source of confusion. Their compositions differ and they are not interchangeable in analytical terms.
Most published work uses cell cultures or rodents because those models are faster and less costly to run. The few human trials that have been reported are small, and several lack control groups or blinding. This restricts what can reasonably be concluded about effects in people.
It is a synthetic tetrapeptide with the sequence alanine-glutamate-aspartate-glycine, often abbreviated AEDG. The molecule is linear and contains no modified residues, so it is fully described by its sequence.