This is a working overview of pineal peptides, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2026-05-27 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.
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.
The four residues give epitalon a molecular formula of C14H22N4O9 and a molecular weight near 390.35 daltons. The presence of two acidic residues, glutamate and aspartate, makes the free peptide strongly acidic, while the alanine and glycine ends provide neutral, nonpolar character. This combination produces a molecule with substantial water solubility. Because there are no cysteine, methionine, or tryptophan residues, the peptide lacks the most common oxidation-sensitive side chains, which simplifies handling compared with many longer peptides.
| 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 |
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.
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.
This multidisciplinary approach allows researchers to identify vulnerable populations, characterize disparities in dementia incidence and outcomes, and evaluate interventions that may delay cognitive decline and improve quality of life for aging individuals. A defining strength of CAPAS is its emphasis on health equity and the study of historically underrepresented populations. Investigators examine racial, ethnic, geographic, and socioeconomic disparities in dementia risk, diagnosis, treatment, caregiving, and healthcare utilization, with particular attention to Hispanic, rural, and medically underserved communities throughout South Texas and the United States. By investigating the social determinants of brain health alongside biological mechanisms of aging, the Center provides critical insights into why dementia disproportionately affects certain populations and identifies opportunities to reduce inequities through targeted prevention strategies, public health initiatives, and healthcare policy. The Center also serves as an important resource for methodological innovation in population aging research. Faculty develop and apply advanced analytical approaches—including longitudinal data analysis, causal inference methods, machine learning, geospatial analysis, and health services research—to better understand the complex interactions among aging, chronic disease, cognitive decline, and social determinants of health.
The society – which only admitted men at the time – initially mistook Benett for a man due to her reputation as a scientist and her unusual first name, addressing her diploma of admission to "Dominum" (Master) Benett. 1840: Scottish fossil collector and illustrator Lady Eliza Maria Gordon-Cumming invited geologists Louis Agassiz, William Buckland and Roderick Murchison to examine her collection of fish fossils. Agassiz confirmed several of Gordon-Cumming's discoveries as new species. 1843: During a nine-month period in 1842–43, English mathematician Ada Lovelace translated Luigi Menabrea's article on Charles Babbage's newest proposed machine, the Analytical Engine. With the article, she appended a set of notes. Her notes were labelled alphabetically from A to G. In note G, she describes an algorithm for the Analytical Engine to compute Bernoulli numbers. It is considered the first published algorithm ever specifically tailored for implementation on a computer, and Ada Lovelace has often been cited as the first computer programmer for this reason. The engine was never completed, so her program was never tested. 1843: British botanist and pioneering photographer Anna Atkins self-published her book Photographs of British Algae, illustrating the work with cyanotypes. Her book was the first book on any subject to be illustrated by photographs. 1846: British zoologist Anna Thynne built the first stable, self-sustaining marine aquarium.
In a mouse model of starvation-induced ketogenesis: 1) the plasma concentration of acetoacetate was markedly increased in wild-type as well as Ffar2 gene knockout mice while at the same time plasma levels of acetic, propionic, and butyric acids were, as a consequence of starvation, far below those that would activate FFAR2; 2) plasma free fatty acid levels were elevated in wild type but not Ffar2 gene knockout mice; 3) fat tissue weight was significantly higher in Ffar2 gene knockout than wild-type mice; and 4) the lean body masses in the two groups of mice were comparable. These results suggest that in mice the acetoacetic acid-induced activation of FFAR2 on fat cells stimulates lipolysis and thereby the rises in plasma fatty acid levels that occur in mild and severe ketoacidosis. Thus, FFAR2 appears to have a physiological role in mild but a pathological role in severe ketogenesis in mice. The acetoacetic acid-FFAR2-lipolysis linkage may occur in humans. Ketogenic diets i.e., low-carbohydrate diets, have been used to treat various neurological diseases. Individuals on these diets develop a mild form of ketogenesis consisting of moderately high blood levels of the ketone bodies and fatty acids. The increased fatty acid levels of individuals on these diets may be due to the stimulation of lipolysis by acetoacetic acid-induced activation of FFAR2 on their fat cells. High blood levels of beta-hydroxybutyric acid may activate hydroxycarboxylic acid receptor 2 on fat cells to similarly cause elevated fatty acid blood levels.
== Contraindications == Contraindications of anastrozole include hypersensitivity to anastrozole or any other component of anastrozole formulations, pregnancy, and breastfeeding. Hypersensitivity reactions to anastrozole including anaphylaxis, angioedema, and urticaria have been observed.
Ovaleap was approved for medical use in the European Union in September 2013. It was approved for medical use in Australia in March 2021. Bemfola was approved for medical use in the European Union in March 2014.
Sources: en.wikipedia.org
glucose A simple sugar with the molecular formula C6H12O6 and the most abundant monosaccharide in nature, being the primary product of photosynthesis, where it is made in a sunlight-powered reaction of water with carbon dioxide. All living organisms are capable of metabolizing glucose via glycolysis, an exergonic pathway which for most organisms is the primary means of obtaining chemical energy to power cellular activities. Metabolic glucose is usually stored in the form of large polymeric aggregates such as amylose in plants and glycogen in animals, and is released by the breakdown of these polymers via glycogenolysis.
== Legislation == The plight of patients with rare diseases became an important political issue in the late 1970s and early 1980s. The US government was subject to pressure from activist groups such as NORD and many others. The chief sponsor of the bill (H.R. 5238) was Henry Waxman (sometimes referred to as the author of the Act), chairman of the Energy and Commerce Subcommittee on Health. It passed the House of Representatives on 14 December 1982, and was similarly approved by voice vote in the Senate on 17 December. On 4 January 1983, President Ronald Reagan signed the ODA into law. Under the ODA drugs, vaccines, and diagnostic agents would qualify for orphan status if they were intended to treat a disease affecting less than 200,000 American citizens. In order to encourage the development of drugs for orphan diseases, the ODA included a number of incentives including seven-year market exclusivity for companies that developed orphan drug, tax credits equal to half of the development costs, later changed to a fifteen-year carry-forward provision and a three-year carry-back that can be applied in profitable year, grants for drug development, fast-track approvals of drugs indicated for rare diseases, and expanded access to the Investigational New Drug Program. The law was also later amended to waive user fees charged under PDUFA. Market exclusivity is particularly appealing to pharmaceutical firms as an incentive to pursue orphan drug development.
The niacin test has been widely used since the 1960s to identify mycobacteria at the species level in the clinical laboratory. The niacin test detects niacin (nicotinic acid) in aqueous extracts of a culture. M. tuberculosis strains that test negative for the niacin test are very rare. Redox reactions happening in Mycobacterium species produce niacin as a part of energy metabolism. Even though all mycobacteria produce niacin, M. tuberculosis accumulates an excess of niacin because of its inability to process niacin, excreting the excess niacin into the culture media, thus allowing it to be detected using the niacin test. The niacin test is typically only conducted on slow-growing, granular, tan colored colonies, as these are the morphology characteristics of M. tuberculosis on an agar plate. Because of its affordability compared to expensive identification methods like pyrosequencing or MALDI-TOF MS that require expensive machines and reagents.
Thiosulfuric acid forms two types of thiosulfate esters, e.g. O,O-dimethyl thiosulfate ((CH3−O−)2S(=O)(=S)) and O,S-dimethyl thiosulfate ((CH3−O−)(CH3−S−)S(=O)2) Thiocyanic acid forms thiocyanate esters, e.g. methyl thiocyanate (CH3−S−C≡N) (if one classifies thiocyanic acid as an inorganic compound), but forms isothiocyanate "esters" as well, e.g. methyl isothiocyanate (CH3−N=C=S), although organyl isothiocyanates are not classified as esters by the IUPAC Phosphorous acid forms two types of esters: phosphite esters, e.g. triethyl phosphite (P(−O−CH2CH3)3), and phosphonate esters, e.g. diethyl phosphonate (H−P(=O)(−O−CH2CH3)2) Some inorganic acids that are unstable or elusive form stable esters.
Sources: en.wikipedia.org
EC 7.2.1 Translocation of inorganic cations linked to oxidoreductase reactions EC 7.2.2 Translocation of inorganic cations linked to the hydrolysis of a nucleoside triphosphate EC 7.2.4 Translocation of inorganic cations linked to decarboxylation An important translocase contained in this group is Na+/K+ pump, also known as EC 7.2.2.13.
== Post-liberation == Post-liberation Calabria was marked by an economic depression, caused by its backward agricultural sector, its few industries in an “infantile state,” crippled by the catastrophic conflict, shoddy and insufficient roads and aqueducts. To seal the disaster, the territory was battered by Allied bombs and the destruction of the retreating Germans. The Allies were perplexed about the possibility of recovery. In a report to General Harold Alexander, the head of Civil Affairs of the Allied military government, English Major General Francis Rennell Rodd, fearing a resurgence of brigandage, complained about how difficult it was to “govern a discouraged and apathetic population,” with an “incompetent bureaucracy”. This misery pushed the poor into action, exacerbating social tensions. The Allied military government worked to restart political and administrative life without disrupting the Fascist state. Crowds at town halls demanded food support. Increasingly the demonstrations were led by anti-fascist communist and socialist agitators. Many times these demonstrations became violent riots, resulting in deaths. The first uprising occurred on September 9 in Limbadi. The newly liberated town turned into a battlefield, but without any fatalities. Many towns liberated by Allied forces revolted against their mayors and municipal secretaries.
== Corporate structure == TikTok Ltd was incorporated in the Cayman Islands in the Caribbean and is based in both Singapore and Los Angeles. It owns entities which are based respectively in Australia (which also runs the New Zealand business), United Kingdom (also owns subsidiaries in the European Union), and Singapore (owns operations in Southeast Asia and India). A spin-off company, TikTok USDS Joint Venture LLC was formed on 22 January 2026 to handle TikTok and other ByteDance properties in the United States. Oracle Corporation, MGX Fund Management Limited, Silver Lake each hold a 15% stake, ByteDance holds a 19.9% stake, and the remaining 35.1% is shared between Dell Technologies founder Michael Dell and Vastmere Strategic Investments. Its parent company, Beijing-based ByteDance, is owned by founders and Chinese investors, other global investors, and employees. One of ByteDance's main domestic subsidiaries is owned by Chinese state funds and entities through a 1% golden share. Employees have reported that multiple overlaps exist between TikTok and ByteDance in terms of personnel management and product development. TikTok says that since 2020, its US-based CEO is responsible for making important decisions, and has downplayed its China connection.
=== Category:EC 3.3 (act on ether bonds) === Category:EC 3.3 Adenosylmethionine hydrolase S-adenosyl-L-homocysteine hydrolase Alkenylglycerophosphocholine hydrolase Alkenylglycerophosphoethanolamine hydrolase Cholesterol-5,6-oxide hydrolase Hepoxilin-epoxide hydrolase Isochorismatase Leukotriene-A4 hydrolase Limonene-1,2-epoxide hydrolase Microsomal epoxide hydrolase Trans-epoxysuccinate hydrolase
=== Stoichiometry === Different stoichiometric ratios of reagents can result in different ratios of products formed. On the industrial scale, adding a large amount of reagent A to reagent B may take time. During this, the reagent A that is added is exposed to a much higher stoichiometric amount of reagent B until it is all added, and this imbalance can lead to reagent A prematurely reacting, and subsequent products to also react with the huge excess of reagent B.
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.
Epitalon is a synthetic tetrapeptide composed of four amino acids: alanine, glutamate, aspartate, and glycine. It is written as Ala-Glu-Asp-Gly. The free peptide has a molecular weight of about 390 daltons and is normally supplied as a lyophilized powder.