epitalon is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Last reviewed on 2025-10-14. Where a claim depends on a specific study, the study is described rather than over-claimed.
The published literature is dominated by a small number of research groups, much of it in Russian-language journals, and independent replication outside those groups is limited. Studies are typically small, use cultured cells or rodent models, and report endpoints that differ between papers, which makes comparison difficult. Large randomised human trials have not appeared in the indexed literature. Questions about absorption, distribution and clearance are therefore still treated as open in reviews that mention the compound.
Epitalon is a synthetic tetrapeptide with the sequence alanine–glutamate–aspartate–glycine, commonly abbreviated AEDG. Its design traces to epithalamin, a peptide fraction prepared from bovine pineal gland extracts that researchers in Saint Petersburg began investigating in the 1970s. The compound has a molecular formula of C14H22N4O9 and a nominal molecular mass near 390 daltons. It holds no approved drug status in the United States or the European Union, and material sold under this name is generally offered as a research chemical rather than a finished pharmaceutical product.
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.
The parent extract epithalamin was characterised as a low-molecular-weight fraction of pineal tissue rather than a single defined chemical entity. Researchers fractionated it and tested successive fragments for activity, a screening approach typical of peptide discovery work in that era. Epitalon emerged from that process as one of the shorter sequences of interest. Because the original extract was never fully resolved into individual components, claims about which constituent drives a given effect rest on inference. This distinction matters when reading older reports that attribute extract observations to the tetrapeptide itself.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C14H22N4O9 | Synthetic tetrapeptide, four residues |
| Nominal mass | Approximately 390 Da | Free peptide; salt forms differ |
| Appearance | White to off-white powder | Commonly supplied lyophilised |
| Solubility class | Freely soluble in water | Also dissolves in aqueous buffer |
| Typical storage | −20 °C, desiccated | Cold packs used during transport |
Nicotinamide adenine dinucleotide (NAD+), a derivative of vitamin B3 (niacin), is an important coenzyme that acts as a hydrogen acceptor. Hundreds of separate types of dehydrogenases remove electrons from their substrates and reduce NAD+ into NADH. This reduced form of the coenzyme is then a substrate for any of the reductases in the cell that need to transfer hydrogen atoms to their substrates. Nicotinamide adenine dinucleotide exists in two related forms in the cell, NADH and NADPH. The NAD+/NADH form is more important in catabolic reactions, while NADP+/NADPH is used in anabolic reactions.
=== Azapirones === Buspirone can be useful in GAD but not particularly effective in treating phobias, panic disorder or social anxiety disorders. It is a safer option for long-term use as it does not cause dependence like benzodiazepines.
== Deaths == 1 January – Sally Oppenheim-Barnes, Baroness Oppenheim-Barnes, 96, British politician, minister of state for consumer affairs (1979–1982), MP (1970–1987), and member of the House of Lords (1989–2019). 4 January – Jenny Randerson, Baroness Randerson, 76, Welsh politician and peer, acting Deputy First Minister of Wales (2001–2002) and member of the House of Lords (since 2011). 24 January – Joan Hanham, Baroness Hanham, 85, British politician, member of the House of Lords (1999–2020) and leader of the Kensington and Chelsea Council (1989–2000). 1 February – John Montagu, 11th Earl of Sandwich, 81, British aristocrat, businessman and politician, member of the House of Lords (1995–2024). 7 February – Dafydd Elis-Thomas, Baron Elis-Thomas, 78, Welsh politician, llywydd of the Senedd (1999–2011), MP (1974–1992) and member of the House of Lords (since 1992). 16 February – Barry Panter, politician (Mayor of Newcastle-under-Lyme), car crash. (death reported on this date) 19 February – Joe Haines, 97, British journalist and public servant, Downing Street press secretary (1969–1970, 1974–1976). 27 March – Christina McKelvie, 57, Scottish politician, MSP (since 2007), minister for culture (2023–2024) and drugs and alcohol policy (since 2024), breast cancer. 30 March – Stanley Kalms, Baron Kalms, 93, British businessman, chairman of Currys, and life peer, member of the House of Lords (2004–2024). 31 March – Janric Craig, 3rd Viscount Craigavon, 80, British hereditary peer and member of the House of Lords (since 1974) 23 April – Peter Taaffe, 83, British Marxist militant.
It is home to the headquarters of three Fortune Global 500 companies, the highest in the region. The nation's best known global companies include Singapore Airlines, Changi Airport, and the Port of Singapore, all of which are among the most-awarded in their respective fields. Singapore Airlines was ranked as Asia's most-admired company, and the world's 19th most-admired company in 2015 by Fortune's annual "50 most admired companies in the world" industry surveys. Other awards it has received include the US-based Travel + Leisure's Best International Airline award, which it has won for 20 consecutive years. Changi Airport connects over 100 airlines to more than 300 cities. The strategic international air hub has more than 480 World's Best Airport awards as of 2015, and is known as the most-awarded airport in the world. Over ten free-trade agreements have been signed with other countries and regions. Singapore is the second-largest foreign investor in India. It is the 14th largest exporter and the 15th largest importer in the world.
Sources: en.wikipedia.org
== Treatment == It is recommended that patients with CMRD follow a strict low-fat diet in addition to fat-soluble vitamin supplementation. The fat soluble vitamins are A, D, E, and K. A combination of vitamin A and vitamin E are effective for combating ophthalmologic complications. When vitamin D is administered early, it aids in preventing osteopenia. People with CMRD are at an increased risk for essential fatty acid deficiency, so dietary counseling is required to maintain the low-fat diet, while attaining sufficient caloric intake and essential fatty acid intake.
=== Metabolism === Strychnine is rapidly metabolized by the liver microsomal enzyme system requiring NADPH and O2. Strychnine competes with the inhibitory neurotransmitter glycine resulting in an excitatory state. However, the toxicokinetics after overdose have not been well described. In most severe cases of strychnine poisoning, the patient dies before reaching the hospital. The biological half-life of strychnine is about 10 hours.
Branstad also stated that he would recommend that Iowa state public schools continue to use ground beef which contains the product, and stated plans to "send a letter to the state's public schools, encouraging them to continue to buy LFTB". On March 22, 2012, 41 Democrats in Congress, led by Representative Chellie Pingree of Maine, wrote a letter to United States Secretary of Agriculture Tom Vilsack, head of the USDA, that "creating a two-tiered school lunch program where kids in less affluent communities get served this low-grade slurry is wrong" and urged its elimination from all public-school lunches. Senator Jon Tester of Montana issued a news release in March 2012 urging Agriculture Secretary Vilsack to remove "pink slime" from school lunches and replace it with "high-quality Montana beef". Tester stated he planned to include provisions in the upcoming farm bill that would allow schools more flexibility in using USDA commodity funds, to increase options in purchasing locally grown and produced foods. In December 2018, lean finely textured beef was reclassified as "ground beef" by the Food Safety And Inspection Service of the United States Department Of Agriculture. This occurred after Beef Products Incorporated submitted new production processes and "a new product" to the Food Safety And Inspection Service, the agency determined that the product may be labeled as "ground beef".
LECT2 Amyloidosis (ALECT2) is a form of amyloidosis caused by the LECT2 protein. It was found to be the third most common (~3% of total) cause of amyloidosis in a set of more than 4,000 individuals studied at the Mayo Clinic; the first and second most common forms the disorder were AL amyloidosis and AA amyloidosis, respectively. Amyloidosis is a disorder in which the abnormal deposition of a protein in organs and/or tissues gradually leads to organ failure and/or tissue injury. Although more than 30 different proteins can cause amyloidosis, the disorder caused by LECT2 is distinctive in three ways. First, it has an unusually high incidence in certain ethnic populations. Second, it is a systemic form of amyloidosis (i.e. amyloid deposited in multiple organs), as opposed to a localized form (amyloid deposits limited to a single organ) but nonetheless injures the kidney without or rarely injuring the other organs in which it is deposited. Third, LECT2 amyloidosis is diagnosed almost exclusively in elderly individuals. Given its relatively recent discovery, exceptionally strong ethnic bias, limitation to causing kidney disease, and restriction to elderly individuals, LECT2 amyloidosis appears at present to be an under-recognized cause of chronic kidney disease particularly in the ethnic groups that exhibit a high incidence of the disorder.
=== Mechanisms and therapeutics for neurodevelopmental disorders === Sur’s group has applied this understanding of plasticity to study disorders of brain development. Rett Syndrome is a devastating neurodevelopmental disorder caused by mutations in MECP2, a transcriptional regulator. Sur hypothesized that a core mechanism of Rett Syndrome is the persistence of immature synapses which may be induced to mature. Rett model mice indeed have a deficit in PI3K/Akt/Erk signaling and PSD95 expression, leading to immature excitatory synapses and prolonged visual cortex plasticity that extends into adulthood. Application of IGF1(1-3) peptide, which degrades IGF binding proteins produced by astrocytes and enhances IGF1 availability, and of full-length IGF1, upregulates these signals to restore normal synaptic plasticity and function and improve behavioral phenotypes. Human Rett IPSC-derived neurons show deficits in IGF1 and similar effectiveness of IGF1 in restoring PI3K, AKT and S6 signals. Based on the lab’s work, an IGF1(1-3) mimetic – trofinetide - was employed in clinical trials for Rett Syndrome. In 2023, trofinetide was approved by the FDA as the first treatment for Rett Syndrome. This work has played an important part in raising optimism that even major disorders of brain development may be treated effectively when understood mechanistically.
Sources: en.wikipedia.org
No. Epithalamin is a heterogeneous peptide fraction obtained from pineal gland extract and contains many components. Epitalon is a single synthetic tetrapeptide with the sequence Ala-Glu-Asp-Gly. Researchers synthesised the shorter peptide while attempting to identify active sequences within the extract.
No endogenous peptide with this exact sequence has been described as a circulating hormone or signalling molecule. The tetrapeptide was designed as a synthetic analogue based on fragments observed in pineal preparations. Any activity discussed in the literature therefore refers to administered material rather than to a natural pool of the compound.
It is not an approved medicine in major jurisdictions and does not appear in the major pharmacopoeias. Material is usually distributed as a research chemical or laboratory reagent. Such labelling places handling responsibility on the purchaser and does not indicate that a regulatory body has reviewed the substance.
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.