This is a working overview of AEDG, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2026-08-01 and is reviewed periodically as new material appears.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Peptide sequence | Ala-Glu-Asp-Gly | Often abbreviated AEDG in research literature |
| Common synonyms | Epithalon, epitalon, AEDG | Spelling variants refer to the same tetrapeptide |
| Molecular formula | C14H22N4O9 | Theoretical monoisotopic mass near 390.35 Da |
| Appearance | White to off-white powder | Typically supplied as a lyophilised solid |
| Solubility class | Freely soluble in water | Hydrophilic peptide; dissolves in aqueous buffer |
Schleswig-Holstein lies on the base of Jutland Peninsula between the North Sea and the Baltic Sea. Strictly speaking, "Schleswig" refers to the German Southern Schleswig (German: Südschleswig or Landesteil Schleswig, Danish: Sydslesvig), whereas Northern Schleswig is in Denmark (South Jutland County, Region of Southern Denmark). The state of Schleswig-Holstein further consists of Holstein, as well as Lauenburg and the formerly independent city of Lübeck. Schleswig-Holstein borders Denmark (Southern Denmark) to the north, the North Sea to the west, the Baltic Sea to the east, and the German states of Lower Saxony, Hamburg, and Mecklenburg-Vorpommern to the south. In the western part of the state, the lowlands have virtually no hills. The North Frisian Islands, as well as almost all of Schleswig-Holstein's North Sea coast, form the Schleswig-Holstein Wadden Sea National Park (Nationalpark Schleswig-Holsteinisches Wattenmeer), which is the largest national park in Central Europe. The Baltic Sea coast in the east of Schleswig-Holstein is marked by bays, fjords, and cliff lines. Rolling hills (the highest elevation is the Bungsberg at 168 metres or 551 feet) and many lakes are found, especially in the eastern part of Holstein called the Holstein Switzerland and the former Duchy of Lauenburg (Herzogtum Lauenburg). The longest river besides the Elbe is the Eider. Among the states of Germany, Schleswig-Holstein has the least area covered by forest, 11%, which is less than in the city-states of Hamburg and Bremen. (The national average is 32%).
== Digestion and metabolism == As a structural analog of glutamate and glutamine, the theanine in teas or supplements is absorbed in the small intestine after oral ingestion; its hydrolysis to L-glutamate and ethylamine occur both in the intestine and liver, possibly functioning as a donor for glutamate synthesis.
Etizolam is a thienodiazepine derivative which is a benzodiazepine analog. The etizolam molecule differs from a benzodiazepine in that the benzene ring has been replaced by a thiophene ring and triazole ring has been fused, making the drug a thienotriazolodiazepine. Although a thienodiazepine, etizolam is clinically regarded as a benzodiazepine because of its mode of action via the benzodiazepine receptor and directly targeting GABAA allosteric modulator receptors. It possesses anxiolytic, amnesic, anticonvulsant, hypnotic, sedative and skeletal muscle relaxant properties. It was patented in 1972 and first approved for medical use in Japan in 1984. As of April 2021, the export of etizolam has been banned in India.
Further, according to a 2000 study by Gerjan Schaafsma, "The questions about the validity of the amino acid scoring pattern and the application of the true fecal rather than the true ileal digestibility correction, as well as the truncation of PDCAAS values warrant a critical evaluation of PDCAAS in its current form as a measure of protein quality in human diets."
Although the Iraqi military committed human rights abuses during the invasion, the alleged incidents that received the most publicity in the US were fabrications of the public relations firm hired by the government of Kuwait to persuade Americans to support military intervention. Shortly after Iraq's invasion of Kuwait, the organization Citizens for a Free Kuwait was formed in the US. It hired the public relations firm Hill & Knowlton for about $11 million, paid by Kuwait's government. Among many other means of influencing US opinion, such as distributing books on Iraqi atrocities to US soldiers deployed, "Free Kuwait" T-shirts and speakers to college campuses, and video news releases to television stations, the firm arranged for an appearance before members of the US Congress in which a young woman identifying herself as a nurse working in the Kuwait City hospital described Iraqi soldiers pulling babies out of incubators and letting them die on the floor. The story helped tip the public and Congress towards a war with Iraq: six Congressmen said the testimony was enough for them to support military action against Iraq and seven Senators referenced the testimony in debate. The Senate supported the military actions in a 52–47 vote. However, a year after the war, this allegation was revealed to be a fabrication. The young woman was found to be a member of Kuwait's royal family and the daughter of Kuwait's ambassador to the US. She had not lived in Kuwait during the Iraqi invasion.
Sources: en.wikipedia.org
=== Mechanism of action === Miconazole inhibits the fungal enzyme 14α-sterol demethylase, resulting in a reduced production of ergosterol. In addition to its antifungal actions, miconazole, similarly to ketoconazole, is known to act as an antagonist of the glucocorticoid receptor. Miconazole is also known to bind to tubulin and inhibit its polymerization. Miconazole inhibits CYP2J2.
== Donation to Yadadri temple == On behalf of the Nizam Family, she donated a gold chain worth Rs 6 lakh to the Sri Lakshmi Narasimha Swamy Temple, Yadadri. The gold necklace was handed over to the temple Executive Officer Geetha by Yadagirigutta Temple Development Authority (YTDA) vice-chairman Kishan Rao.
=== Deworming === Doxycycline can be used against parasitic nematodes (worms) that cause filariasis. It kills symbiotic bacteria of the genus Wolbachia in the reproductive tracts of the nematodes, making the nematodes sterile (unable to reproduce). This reduces transmission of diseases such as onchocerciasis and elephantiasis. A randomized controlled trial showed that an eight-week course of doxycycline almost eliminates the release of microfilariae (larval offspring of the nematodes).
=== Legal status === In 2003, Bahrain classified tianeptine a controlled substance due to increasing reports of misuse and recreational use. In Russia, tianeptine (sold under the brand name "Coaxil") is a schedule III controlled substance in the same list as the majority of benzodiazepines and barbiturates. On 13 March 2020, with a decree approved by the Minister of Health, Italy became the first European country to outlaw tianeptine considering it a Class I controlled substance.
Sources: en.wikipedia.org
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.
No. Epithalamin is a peptide-rich extract prepared from bovine pineal glands, while epitalon is a short synthetic peptide designed as a defined analogue of it. The synthetic version was intended to provide a reproducible molecule with some of the same proposed biological activity.
Telomere elongation and telomerase activation have been reported in cultured human somatic cells, but evidence from living human subjects is limited and has not been independently confirmed at scale. Reported findings come largely from small studies with differing designs, so the question remains open rather than settled.
The peptide contains four residues in the order alanine, glutamate, aspartate and glycine, abbreviated AEDG. The chain is linear and held together by three peptide bonds. Its calculated mass for the uncharged free form is about 390.3 daltons.