If you have been reading about Epithalamin and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Updated 2025-11-21. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
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.
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.
| 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.
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.
== In food == Taurine occurs naturally in fish and meat. The mean daily intake from omnivore diets was determined to be around 58 mg (range 9–372 mg), and to be low or negligible from a vegan diet. Typical taurine consumption in the American diet is about 123–178 mg per day.
Although it remains uncertain as to who was involved in this incident, there has been immediate assertions that North Korea is connected, as it threatened to attack South Korea's government institutions, major national banks and traditional newspapers numerous times – in reaction to the sanctions it received from nuclear testing and to the continuation of Foal Eagle, South Korea's annual joint military exercise with the United States. North Korea's cyber warfare capabilities raise the alarm for South Korea, as North Korea is increasing its manpower through military academies specializing in hacking. Current figures state that South Korea only has 400 units of specialized personnel, while North Korea has more than 3,000 highly trained hackers; this portrays a huge gap in cyber warfare capabilities and sends a message to South Korea that it has to step up and strengthen its Cyber Warfare Command forces. Therefore, in order to be prepared from future attacks, South Korea and the United States will discuss further about deterrence plans at the Security Consultative Meeting (SCM). At SCM, they plan on developing strategies that focuses on accelerating the deployment of ballistic missiles as well as fostering its defense shield program, known as the Korean Air and Missile Defense.
== Early life and education == Alessio Ciulli was born in Florence on 22 July 1977. He attended University of Florence in his hometown with an undergraduate laurea in chemistry and graduated magna cum laude. Under the late Prof Ivano Bertini, his final year laurea project was in computational drug design and NMR spectroscopy of matrix metalloproteases. Awarded with a Gates Cambridge Scholarship, he did his PhD under the supervision of the late Professor Chris Abell at the University of Cambridge and in collaboration with Astex Technology (now Astex Pharmaceuticals) produced a thesis concerned with studying weak protein-ligand interactions using biophysical and structural methods.
Methods similar to those first developed by Roselius have continued to dominate, and are sometimes known as the direct organic solvent method. However, because of health concerns regarding benzene (which is recognized today as a carcinogen), other solvents, such as dichloromethane or ethyl acetate, are now used. The unroasted (green) beans are first steamed and then rinsed with the solvent which extracts the caffeine, while leaving other constituents largely unaffected. The process is repeated between 8 and 12 times until the caffeine content meets the required standard (97% of caffeine removed according to the US standard, or 99.9% caffeine-free by mass per the EU standard).
Sources: en.wikipedia.org
=== Elements regarding the consideration of gender in medicine === Efforts to incorporate gender into medical research began in the late 1980s, primarily in the United States. In 1995, the World Health Organization (WHO) established the Department of Gender and Women's Health. Several European countries followed in the early 2000s by creating research bodies focused on gender in medicine. In France, the "Gender and Health Research" group was created at Inserm in 2013. Public institutions such as French National Public Health Agency and the Haute Autorité de Santé (HAS) have since addressed gender disparities in research and treatment.
=== Canada === Beak trimming is legal but regulated in Canada. The National Farm Animal Care Council's 2016 Poultry Code of Practice urges to 'make every effort to manage breeders so that physical alterations, such as beak trimming, are not necessary'; should it prove necessary, however, infrared treatment is recommended over hot blade treatment.
=== 2010 and beyond === By around 2010, Hanmi's R&D had two areas of interest: developing longer-lasting peptide and protein therapeutics using its "Lapscovery" technology, and developing small molecule tyrosine-kinase inhibitors for cancer and autoimmune diseases. Its strategy was to developmental incremental modifications of existing drugs, create new combination drugs, and to develop novel drugs. In August 2014 Hanmi exclusively licensed rights in China for poziotinib, a small molecule EGFR inhibitor, to the Chinese company Luye Pharma; in February 2015 Hanmi licensed rights in the rest of the world outside of South Korea to Spectrum Pharmaceuticals. In March 2015 Hanmi and Lilly signed an exclusive license outside of Asia for Hanmi's small molecule Bruton's tyrosine kinase inhibitor in the field of autoimmune diseases; Lilly paid $50 million upfront and the deal included up to $640 million in milestones and royalties greater than 10%. In November 2015 Hanmi signed three agreements:
Studies suggest that smoking decreases appetite, but did not conclude that overweight people should smoke or that their health would improve by smoking, because this habit is a cause of heart disease. Smoking also decreases weight by overexpressing the gene AZGP1, which stimulates lipolysis. Smoking causes about 10% of the global burden of fire deaths, and smokers are placed at an increased risk of injury-related deaths in general, partly due to also experiencing an increased risk of dying in a motor vehicle crash. Smoking increases the risk of symptoms associated with Crohn's disease (a dose-dependent effect with use of greater than 15 cigarettes per day). There is some evidence for decreased rates of endometriosis in infertile smoking women, although other studies have found that smoking increases the risk in infertile women. There is little or no evidence of a protective effect in fertile women. Some preliminary data from 1996 suggested a reduced incidence of uterine fibroids, but overall the evidence is unconvincing. Current research shows that tobacco smokers who are exposed to residential radon are twice as likely to develop lung cancer as non-smokers. As well, the risk of developing lung cancer from asbestos exposure is twice as likely for smokers than for non-smokers. New research has found that women who smoke are at significantly increased risk of developing an abdominal aortic aneurysm, a condition in which a weak area of the abdominal aorta expands or bulges, and is the most common form of aortic aneurysm.
The observation that living things inherit traits from their parents has been used since prehistoric times to improve crop plants and animals through selective breeding. The modern science of genetics, seeking to understand this process, began with the work of the Augustinian friar Gregor Mendel in the mid-19th century.
Sources: en.wikipedia.org
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Genetic vaccines are based on the principle of uptake of a nucleic acid into cells, whereupon a protein is produced according to the nucleic acid template. This protein is usually the immunodominant antigen of the pathogen or a surface protein that enables the formation of neutralizing antibodies. The subgroup of genetic vaccines encompass viral vector vaccines, RNA vaccines and DNA vaccines.
==== Hong Kong ==== The scandal led to an erosion of trust in locally produced infant formula and from then on, many Shenzhen residents and parallel traders travelled across the border to purchase powdered milk from Hong Kong shops. Lower confidence in mainland Chinese production, combined with the relaxation of visa requirements for mainland residents, had resulted in shortages of infant formula in Hong Kong for an extended time. Because of a great public outcry, the Import and Export (General) (Amendment) Regulation 2013 was passed in Hong Kong, prohibiting the unlicensed export of powdered formula, including milk and soya milk powder for infants and children under 36 months. According to the HK government, the regulation is not applicable to "powdered formula that is exported in the accompanied personal baggage of a person aged 16 or above leaving Hong Kong if the person did not leave Hong Kong in the last 24 hours and the formula does not exceed 1.8 kg [4 lb] in total net weight". Although the Hong Kong government imposed a strict 2-can limit on the export of infant formula in March 2013, spurred price differentials caused by sales tax on the mainland and lax customs, trafficking activity including for powdered milk has continued, exacerbating the Hong Kong-Mainland conflict. The catchment area for traffickers spread from Fan Ling and Sheung Shui southward to Yuen Long and Tuen Mun, causing localist camp such as Civic Passion and Hong Kong Indigenous to take to the streets in direct action in 2015.
=== RNA sequencing === RNA sequencing was one of the earliest forms of nucleotide sequencing. The major landmark of RNA sequencing is the sequence of the first complete gene and the complete genome of Bacteriophage MS2, identified and published by Walter Fiers and his coworkers at the University of Ghent (Ghent, Belgium), in 1972 and 1976. Traditional RNA sequencing methods require the creation of a cDNA molecule which must be sequenced.
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.
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.