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 2026-08-01 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.
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.
The compound is described in the literature as a derivative of epithalamin, a preparation obtained from bovine pineal tissue. Work on this peptide family was carried out mainly by a research group in Saint Petersburg beginning in the 1980s, and the substance was later registered for clinical use in Russia under the name Epitalon. Outside that region it is generally treated as a research chemical rather than an approved medicine. Statements about its biological activity rest on a relatively small number of studies, and independent replication remains limited.
| 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 |
=== Continuing Claim === His only son, Ernest Augustus, Crown Prince of Hanover, inherited the claim upon George's death in 1878. Ernest Augustus was also first in line to the throne of the Duchy of Brunswick, whose rulers had been a junior branch of the House of Hanover. In 1884, that branch became extinct with the death of William, a distant cousin of Ernest Augustus. Since Ernest Augustus refused to renounce his claim to annexed Hanover, the Bundesrat of the German Empire ruled that he would disturb the peace of the empire if he ascended the throne of Brunswick. As a result, Brunswick was ruled by a regency until 1913, when his son, also named Ernest Augustus, married the German Emperor's daughter, Princess Viktoria Luise and swore allegiance to the German Empire. The Duke then renounced his claim to Brunswick in favour of his son, and the Bundesrat allowed the younger Ernest Augustus to take possession of Brunswick as a kind of dowry compensation for Hanover. The German-Hanoverian Party, which at times supported secession from the Reich, demanded a separate status for the province in the Reichstag. The party existed until banned by the Nazi government.
=== Exogenous sources === The formation of ROS can be stimulated by a variety of agents such as pollutants, heavy metals, allergens, cigarette smoke, drugs, insecticides, ozone, pesticides, toxins, UV radiation. In plants, in addition to the action of dry abiotic factors, high temperature, interaction with other living beings can influence the production of ROS. In a process termed radiolysis, through the interaction of water and ionizing radiation, damaging intermediates can be generated. In the process, a water molecule gets excited and subsequently dissociates into a hydrogen (•H) and a hydroxyl radical (•OH), which both are highly reactive. The radicals may attack cells and molecules on the cell surface, and through a chain reaction dozens of molecules can be damaged by the homolysis of a single water molecule. In plants, the production of ROS occurs during events of abiotic stress that lead to a reduction or interruption of metabolic activity. For example, the increase in temperature, drought are factors that limit the availability of CO2 due to stomatal closure, increasing the production of ROS, such as O2·- and 1O2 in chloroplasts. The production of 1O2 in chloroplasts can cause reprogramming of the expression of nucleus genes leading to chlorosis and programmed cell death. In cases of biotic stress, the generation of ROS occurs quickly and weakly initially and then becomes more solid and lasting. The first phase of ROS accumulation is associated with plant infection and is probably independent of the synthesis of new ROS-generating enzymes.
Cocaine is a central nervous system (CNS) stimulant and tropane alkaloid, derived primarily from the leaves of two coca species native to South America: Erythroxylum coca and E. novogranatense. The leaves are processed into cocaine paste, a crude mixture of coca alkaloids, from which cocaine base is isolated and then converted to cocaine hydrochloride. Although total synthesis is possible, it is complex and not used for production. Historically, cocaine was a standard topical medication used as a local anesthetic with intrinsic vasoconstrictor properties. However, its high abuse potential, adverse effects, and cost have limited its medical use and led to its replacement by alternative medicines. Street cocaine is commonly snorted, injected, or smoked as crack cocaine; its effects last up to 90 minutes depending on the route of administration. Pharmacologically, cocaine acts as a serotonin–norepinephrine–dopamine reuptake inhibitor (SNDRI), producing reinforcing effects such as euphoria, increased alertness, concentration, libido, and reduced fatigue and appetite. Cocaine has numerous adverse effects. Acute use can cause vasoconstriction, tachycardia, hypertension, hyperthermia, or seizures, while overdose may lead to stroke, heart attack, or sudden cardiac death. It also produces a spectrum of psychiatric symptoms, including agitation, paranoia, anxiety, irritability, psychosis, hallucinations, delusions, violence, and suicidal or homicidal thinking. Prenatal exposure poses risks to fetal development.
=== Development of de novo sequencing algorithms === An old method is to list all possible peptides for the precursor ion in mass spectrum, and match the mass spectrum for each candidate to the experimental spectrum. The possible peptide that has the most similar spectrum will have the highest chance to be the right sequence. However, the number of possible peptides may be large. For example, a precursor peptide with a molecular weight of 774 has 21,909,046 possible peptides. Even though it is done in the computer, it takes a long time. Another method is called "subsequencing", which instead of listing whole sequence of possible peptides, matches short sequences of peptides that represent only a part of the complete peptide. When sequences that highly match the fragment ions in the experimental spectrum are found, they are extended by residues one by one to find the best matching. In the third method, graphical display of the data is applied, in which fragment ions that have the same mass differences of one amino acid residue are connected by lines. In this way, it is easier to get a clear image of ion series of the same type. This method could be helpful for manual de novo peptide sequencing, but doesn't work for high-throughput condition. The fourth method, which is considered to be successful, is the graph theory. Applying graph theory in de novo peptide sequencing was first mentioned by Bartels. Peaks in the spectrum are transformed into vertices in a graph called "spectrum graph".
== Target and events == The primary target of the doctrine was originally the largest communist country, the Soviet Union. However, additional targets also included the other communist countries like the China, Laos, Vietnam, and North Korea. After the dissolution of the Soviet Union in 1991 and China's economic prominence in the early 21st century, China became the major target of the doctrine.
Sources: en.wikipedia.org
==== Deep-frying ==== This method produces ready to eat tempeh products. A culinary oil with a high smoke point, such as rapeseed, soy, safflower, peanut, or coconut oil, is heated to 180 °C (350 °F) in the deep fryer. The tempeh is deep-fried until golden brown and crisp, and then cooled quickly in a sterile environment to be sealed in Pliofilm bags and stored in a cool, dry place. The shelf life of this product lasts around a week but can be extended if the tempeh is sun dried or oven dried prior to deep frying.
In October 1912, when the 6th Chugoku Six Prefectures United Livestock Breeders' Show was held in Himeji City, Hyōgo Prefecture, two crossbred bulls won first prize as "Improved Japanese Breed" (改良和種, kairyō washu) and the term "Improved Japanese Breed" came into use thereafter. Thereafter, organized breeding efforts to increase the number of superior Wagyu cattle began. According to a survey conducted in 1914, there were 61 different breeds of Wagyu in Japan at that time, including Tajima cattle, Iwaizumi cattle, Mishima cattle, Aso cattle, and others. However, these were not actual breeds, but only names of regional classifications. In the case of Hyōgo Prefecture, the leading producer of Wagyu cattle (Kobe cattle and Tajima cattle) at that time, the number of stud bulls owned by breed as of 1914 was as follows.
During the Early Middle Ages, the reopening of graves and manipulation of the corpses or artifacts contained within them was a widespread phenomenon and a common part of the life course of early medieval cemeteries across Western and Central Europe. The reopening of furnished or recent burials occurred especially from the 5th to the 8th centuries CE over the broad zone of European row-grave-style furnished inhumation burial, which comprised the regions of Romania, Hungary, the Czech Republic, Slovakia, Switzerland, Austria, Germany, the Low Countries, France, and South-eastern England. Medieval European Christianity sometimes developed complex burial rituals and attached great importance to their correct performance: the fate of the soul of the deceased might depend on observing the proper ceremonial. For example:
=== Opioid addiction === In his Deposition: Testimony Concerning a Sickness in the introduction to later editions of Naked Lunch (first published in 1959), William S. Burroughs wrote that apomorphine treatment was the only effective cure to opioid addiction he has encountered:
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.