pineal peptides 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 2026-03-28. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
The proposed relationship between epitalon and pineal function is a central part of its background. Khavinson's group reported that short peptides corresponding to regions of larger pineal proteins could influence gene expression in cells. Epitalon was framed as a synthetic analogue of an active fragment rather than a direct isolation product. Whether the tetrapeptide reproduces the effects of the parent extract is an open question, because comparative studies are limited and the parent extract itself is not a single defined substance.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C14H22N4O9 | Computed for the free acid of Ala-Glu-Asp-Gly |
| Molecular mass | About 390.35 g/mol | Free peptide; salt forms shift the value |
| Appearance | White to off-white solid | Typical of short peptides after freeze-drying |
| Solubility class | Freely soluble in water | Aqueous buffers are also commonly used |
| Common synonyms | Epitalon, epithalone, AEDG | AEDG is the single-letter sequence |
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.
Methylephedrine, sold under the brand name Metheph among others, is a sympathomimetic medication described as an antiasthmatic agent and used to treat coughing and nasal congestion. It is reported to be used in various over-the-counter cough and cold preparations throughout the world, including Japan. The drug is an ephedrine-like sympathomimetic and activates α- and β-adrenergic receptors. Chemically, it is a substituted amphetamine and is closely related to ephedrine. Methylephedrine was discovered by 1927. It is mostly no longer marketed as a prescription drug. The drug is also found naturally as an alkaloid in Ephedra species including Ephedra sinica, Ephedra vulgaris, and Ephedra distachya.
=== Recombinant preparations === Follitropin alfa Generic Follitropin alfa injection Brands Gonal-f Cinnal-f Fertilex Ovaleap Bemfola Generic Follitropin alfa / lutropin alfa combination Brands Pergoveris Follitropin beta Generic follitropin beta injection Brands Follistim AQ Puregon Follitropin delta Generic follitropin delta injection Brands Rekovelle The package insert for Gonal-f states that based on physio-chemical tests and bioassays that follitropin beta and follitropin alfa are indistinguishable. Two studies showed no difference. However, a more recent study showed there may be a slight clinical difference, with the alfa form tending towards a higher pregnancy rate and the beta form tending towards a lower pregnancy rate, but with significantly higher estradiol (E2) levels. The package insert for Puregon states that structural analysis shows that the amino acid sequence of follitropin beta is identical to that of natural human follicle stimulating hormone (hFSH). Further, the ogliosaccharide side chains are very similar, but not completely identical to that of natural hFSH. However, these small differences do not affect the bioactivity compared to natural hFSH. Gonal-f was approved for medical use in the European Union in October 1995. Puregon was approved for medical use in the European Union in February 1996. Rekovelle was approved for medical use in the European Union in December 2016.
Camptocormia, also known as bent spine syndrome (BSS), is a symptom of a multitude of diseases that is most commonly seen in the elderly. It is identified by an abnormal thoracolumbar spinal flexion, which is a forward bending of the lower joints of the spine, occurring in a standing position. In order to be classified as BSS, the anterior flexion (the lower back bending) must reach 45 degrees anteriorly. This classification differentiates it from a similar syndrome known as kyphosis. Although camptocormia is a symptom of many diseases, there are two common origins: neurological and muscular. Camptocormia is treated by alleviating the underlying condition causing it through therapeutic measures or lifestyle changes.
1993/2553) Hull and Holderness Community Health National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2554) Kent Ambulance National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2555) Kettering General Hospital National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2556) King's Mill Centre for Health Care Services National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2557) Leicestershire Ambulance and Paramedic Service National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2558) Leicestershire Mental Health Service National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2559) Lincoln Hospitals National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2560) Northampton General Hospital National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2561) Norwich Community Health Partnership National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2562) Nottingham Healthcare National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2563) Oxfordshire Ambulance National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2564) Oxfordshire Community Health National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2565) Oxfordshire Mental Healthcare National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2566) Pilgrim Health National Health Service Trust (Establishment) Order 1993 (S.I. 1993/2567) Plymouth Hospitals National Health Service Trust (Establishment) Order 1993 (S.I.
Sources: en.wikipedia.org
== External links == "Bombesin Receptors: BB2". IUPHAR Database of Receptors and Ion Channels. International Union of Basic and Clinical Pharmacology. Archived from the original on 2016-03-03. Retrieved 2007-10-25. IUPHAR GPCR Database - BB2 receptor Archived 2016-03-03 at the Wayback Machine Receptors,+Bombesin at the U.S. National Library of Medicine Medical Subject Headings (MeSH) This article incorporates text from the United States National Library of Medicine, which is in the public domain.
Reptiles are a class of animals comprising turtles, tuataras, lizards, snakes and crocodiles. They are tetrapods, but the snakes and a few species of lizard either have no limbs or their limbs are much reduced in size. Their bones are better ossified and their skeletons stronger than those of amphibians. The teeth are conical and mostly uniform in size. The surface cells of the epidermis are modified into horny scales which create a waterproof layer. Reptiles are unable to use their skin for respiration as amphibians do and have a more efficient respiratory system drawing air into their lungs by expanding their chest walls. The heart resembles that of the amphibian but there is a septum which more completely separates the oxygenated and deoxygenated bloodstreams. The reproductive system has evolved for internal fertilization, with a copulatory organ present in most species. The eggs are surrounded by amniotic membranes which prevents them from drying out and are laid on land, or develop internally in some species. The bladder is small as nitrogenous waste is excreted as uric acid. Turtles are notable for their protective shells. They have an inflexible trunk encased in a horny carapace above and a plastron below. These are formed from bony plates embedded in the dermis which are overlain by horny ones and are partially fused with the ribs and spine. The neck is long and flexible and the head and the legs can be drawn back inside the shell. Turtles are vegetarians and the typical reptile teeth have been replaced by sharp, horny plates.
=== Synthesis === The chemical synthesis of MDMA has been described. There are numerous methods available to synthesize MDMA via different intermediates. The original MDMA synthesis described in Merck's patent involves brominating safrole to 1-(3,4-methylenedioxyphenyl)-2-bromopropane and then reacting this adduct with methylamine. Most illicit MDMA is synthesized using MDP2P (3,4-methylenedioxyphenyl-2-propanone) as a precursor. MDP2P in turn is generally synthesized from piperonal, safrole or isosafrole. One method is to isomerize safrole to isosafrole in the presence of a strong base, and then oxidize isosafrole to MDP2P. Another method uses the Wacker process to oxidize safrole directly to the MDP2P intermediate with a palladium catalyst. Once the MDP2P intermediate has been prepared, a reductive amination leads to racemic MDMA (an equal parts mixture of (R)-MDMA and (S)-MDMA). Relatively small quantities of essential oil are required to make large amounts of MDMA. The essential oil of Ocotea cymbarum, for example, typically contains between 80 and 94% safrole. This allows 500 mL of the oil to produce between 150 and 340 grams of MDMA.
=== High-throughput === Due to the highly time-consuming and work-intensive standard procedure, the method of in-gel digestion was limited to a relatively small number of protein spots to be processed at a time. Therefore, it has been found to be the ideal object for automation ambitions to overcome these limitations for industrial and service laboratories. Today, in laboratories where in-gel digestion is performed in high-throughput quantities, the procedure is usually automated. The degree of automation varies from simple pipetting robots to highly sophisticated all-in-one solutions, offering an automated workflow from gel to mass spectrometry. The systems usually consist of a spot picker, a digestion robot, and a spotter. The advantages of the automation other than the larger number of spots to be processed at a time are the reduced manual work and the improved standardisation. Due to the many handling steps of the method, the results of the manual process could vary depending on the dexterity of the user and the risk of contamination is high. Therefore, the quality of the results is described to be one main advantage of the automated process. Drawbacks of automated solutions are the costs for robots, maintenance and consumables as well as the complicated setup of the process. Since the automated picking needs digitised information of the spot location, the analysis of the gel image for relevant spots has to be done by software requiring standardised imaging methods and special scanners.
=== 2000s === When the Ultimate Marvel imprint was created with reimagined versions of Marvel's characters, an alternate Wolverine appeared in 2001 with the Ultimate X-Men. The series was initially written by Mark Millar, who went on to write a number of other influential stories about Wolverine, in both mainstream continuity and alternate versions. Sales for X-Men comics declined somewhat at the turn of the 21st century, and Grant Morrison was hired to revive interest in the characters, including Wolverine. This was achieved with the more experimental New X-Men; the re-titling of the ongoing X-Men series for issues #114-156 (May 2001 to March 2004). Frank Quitely and Chris Bachalo drew many of these issues, as well as a returning Silvestri. Origin, a six-issue limited series by co-writers Joe Quesada, Paul Jenkins, and Bill Jemas and artist Andy Kubert (Nov. 2001 – July 2002), expanded on Wolverine's past. This story provided Wolverine's birth name as James Howlett and recounted his previously mysterious childhood and adolescence. Tom DeSanto, a writer and producer for the X-Men film franchise, indicates that Marvel felt the necessity to provide a definitive origin for Wolverine because of his success as a film character and concern that the films would begin to answer these questions if the comic books failed to do so first. The ongoing Wolverine title ended with issue #189 (2003), and was replaced with a new volume. It was initially written by Greg Rucka and illustrated by Darick Robertson.
Sources: en.wikipedia.org
=== Regulation === The level of regulation includes Schedule IV non-narcotic (depressant) (ACSCN 2285) in the United States under the Controlled Substances Act 1970—but along with a few other barbiturates and at least one benzodiazepine, and codeine, dionine, or dihydrocodeine at low concentrations, it also has exempt prescription and had at least one exempt OTC combination drug now more tightly regulated for its ephedrine content. The phenobarbitone/phenobarbital exists in subtherapeutic doses which add up to an effective dose to counter the overstimulation and possible seizures from a deliberate overdose in ephedrine tablets for asthma, which are now regulated at the federal and state level as: a restricted OTC medicine and/or watched precursor, uncontrolled but watched/restricted prescription drug & watched precursor, a Schedule II, III, IV, or V prescription-only controlled substance & watched precursor, or a Schedule V (which also has possible regulations at the county/parish, town, city, or district as well aside from the fact that the pharmacist can also choose not to sell it, and photo ID and signing a register is required) exempt Non-Narcotic restricted/watched OTC medicine.
Later on, grandmothers can again provide more direct care for the infant. These techniques require the mother's commitment over a period of weeks or months. However, even when lactation is established, the supply may not be large enough to breastfeed exclusively. A supportive social environment improves the likelihood of success. As the mother's milk production increases, other feeding can decrease. Parents and other family members should watch the baby's weight gain and urine output to assess nutritional adequacy. A WHO manual for physicians and senior health workers, citing a 1992 source, states: "If a baby has been breastfeeding sometimes, the breastmilk supply increases in a few days. If a baby has stopped breastfeeding, it may take 1–2 weeks or more before much breastmilk comes." Induced lactation, also called adoptive lactation, is the process of starting breastfeeding in a woman who did not give birth. This usually requires the adoptive mother to take hormones and other drugs to stimulate breast development and promote milk production. In some cultures, breastfeeding an adoptive child creates milk kinship that builds community bonds across class and other hierarchical bonds.
=== Parasitology === MALDI-TOF spectra have been used for the detection and identification of various parasites such as trypanosomatids, Leishmania and Plasmodium. In addition to these unicellular parasites, MALDI/TOF can be used for the identification of parasitic insects such as lice or cercariae, the free-swimming stage of trematodes.
In November 2023, Moore expressed disappointment with a Fourth Circuit Court of Appeals ruling that struck down a provision of the state's Firearm Safety Act of 2013 that required handgun owners to obtain a "handgun qualification license" to buy a handgun. In May 2024, Moore signed into law a bill that would allow the attorney general of Maryland to sue firearms manufacturers and local gun dealerships and another to establish the Center for Firearm Violence Prevention and Intervention, which would oversee collaboration between state agencies, hospitals, and community-based violence intervention programs to decrease violent crimes. In May 2026, Moore signed innto law a bill that would ban the sale or manufacture of semi-automatic pistols that can be converted into a machine gun with the installation of a Glock switch.
Sources: en.wikipedia.org
It is a four-amino-acid peptide with the sequence alanine-glutamate-aspartate-glycine. The chain is unmodified and contains only standard proteinogenic residues, which makes it straightforward to produce by solid-phase synthesis and to characterise by standard peptide methods.
Epitalon and epithalon both circulate, and the difference reflects transliteration of a name coined in Russian-language publications. Reference to the extract it derives from, epithalamin, explains the shared stem. Databases and suppliers are inconsistent, so a search for one spelling alone may miss relevant entries.
No. Epithalamin is a multi-component preparation obtained from pineal tissue, and its exact composition is not fully characterised. Epitalon is a single defined tetrapeptide described as a short synthetic counterpart of that extract, so the two are related in origin but not interchangeable in identity.
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.