epithalamin 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.
Updated 2025-10-17. Numbers and descriptions here follow the published literature rather than marketing material.
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.
Published studies on epitalon are dominated by a small number of research groups, and independent replication in other laboratories remains limited. Proposed mechanisms include activation of telomerase and modulation of melatonin rhythms, but the evidence for either rests mainly on cell cultures and animal models. Whether the peptide produces comparable effects in humans is an open question, and the absence of large controlled trials means the literature is best read as exploratory rather than settled.
Epitalon is a synthetic four-amino-acid peptide with the sequence alanine-glutamate-aspartate-glycine, commonly abbreviated AEDG. Its molecular formula is C14H22N4O9, and its calculated molar mass is approximately 390.35 grams per mole. The compound is a short fragment related to a peptide fraction isolated from bovine pineal gland extracts, and it is normally supplied as a lyophilised powder intended for laboratory research. It is not a registered pharmaceutical product in most countries.
The peptide emerged from research carried out in Saint Petersburg from the late 1980s onward, where investigators searched for shorter active fragments of a pineal preparation known as epithalamin. The name epitalon was chosen to reflect that parent extract. Early reports described effects on neuroendocrine markers and on the lifespan of laboratory animals. Much of that work appeared in Russian-language journals, with English translations following later, which affects how readily the original protocols can be assessed by outside groups.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic tetrapeptide | Four residues, linear chain |
| Residue sequence | Ala-Glu-Asp-Gly | Single-letter form AEDG |
| Calculated mass | 390.3 daltons | Value for the free, uncharged form |
| Appearance | White to off-white powder | Usually supplied lyophilized |
| Solubility | Freely soluble in water | Often handled as a salt form |
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.
Residue composition is the property that most cleanly separates verified material from mislabelled samples. Alanine, glutamate, aspartate and glycine appear in that order from the N-terminus, and the two acidic residues sit in the middle of the chain. Because the peptide is short, it can be produced by solid-phase synthesis and characterised by mass spectrometry without ambiguity. Any reported sample whose measured mass departs substantially from 390 daltons is a different compound or a degraded mixture rather than epitalon.
Epitalon is a synthetic tetrapeptide whose four residues are alanine, glutamate, aspartate and glycine, commonly abbreviated AEDG. Its molecular formula is C14H22N4O9 and its monoisotopic mass is near 390.35 daltons. The peptide carries two acidic side chains, so it is neutral to negatively charged in most aqueous buffers. Published reference summaries usually list it under both spellings, epitalon and epithalon, and treat the two names as the same material.
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.
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.
== Awards and honors == Wilhelm Exner Medal, 1958 Johann Josef Ritter von Precht Medal of TU wien, 1965 Erwin Schrödinger Prize of the Austrian Academy of Sciences, 1970 M.S. Tswett Chromatography Award, 1974 (first year awarded) Commemorative M.S. Tswett Medal of the U.S.S.R. Academy of Sciences, 1978 Honorary degree from the Technische Universität Berlin First-class cross of the Austrian Order for Science and Art A Street in Munich was called after her (Erika-Cremer-Straße in 81829 München)
After dehydration, the mummy was wrapped in many layers of linen cloth. Within the layers, Egyptian priests placed small amulets to guard the decedent from evil. Once the mummy was completely wrapped, it was coated in resin in order to keep the threat of moist air away. The resin was also applied to the coffin in order to seal it. The mummy was then sealed within its tomb, alongside the worldly goods that were believed to help aid it in the afterlife. Aspergillus niger, a hardy species of fungus capable of living in various environments, has been found in the mummies of ancient Egyptian tombs and can be inhaled when they are disturbed.
That said, the residues of the C peptide that are conserved across species interact with similarly conserved residues on the A and B chains. Thus, it is hypothesized that these conserved residues are important for the functionality of mature insulin.
Progesterone ( ; P4) is an endogenous steroid and progestogen sex hormone involved in the menstrual cycle, pregnancy, and embryogenesis of humans and other species. It belongs to a group of steroid hormones called the progestogens and is the major progestogen in the body. Progesterone has a variety of important functions in the body. The hormone is also an important metabolic intermediate in the production of other endogenous steroids, including the sex hormones and the corticosteroids, and acts in the brain as a neurosteroid. In addition to its role as a natural hormone, progesterone is also used as a medication, such as in combination with estrogen for contraception, to reduce the risk of uterine or cervical cancer, in hormone replacement therapy, and in feminizing hormone therapy. It was first prescribed in 1934.
An emulsion is a mixture of two or more liquids that are normally immiscible (unmixable or unblendable) owing to liquid-liquid phase separation. Emulsions are part of a more general class of two-phase systems of matter called colloids. Although the terms colloid and emulsion are sometimes used interchangeably, emulsion more narrowly refers to when both phases, dispersed and continuous, are liquids. In an emulsion, one liquid (the dispersed phase) is dispersed in the other (the continuous phase). Examples of emulsions include vinaigrettes, homogenized milk, liquid biomolecular condensates, and some cutting fluids for metal working. Two liquids can form different types of emulsions. As an example, oil and water can form, first, an oil-in-water emulsion, in which the oil is the dispersed phase, and water is the continuous phase. Second, they can form a water-in-oil emulsion, in which water is the dispersed phase and oil is the continuous phase. Multiple emulsions are also possible, including a "water-in-oil-in-water" emulsion and an "oil-in-water-in-oil" emulsion. Emulsions, being liquids, do not exhibit a static internal structure. The droplets dispersed in the continuous phase (sometimes referred to as the "dispersion medium") are usually assumed to be statistically distributed to produce roughly spherical droplets. The term "emulsion" is also used to refer to the photo-sensitive side of photographic film. Such a photographic emulsion consists of silver halide colloidal particles dispersed in a gelatin matrix.
Sources: en.wikipedia.org
== Function == CGRP is produced in both peripheral and central neurons. It is a potent peptide vasodilator and can function in the transmission of nociception. In the spinal cord, the function and expression of CGRP may differ depending on the location of synthesis. CGRP is derived mainly from the cell bodies of motor neurons when synthesized in the ventral horn of the spinal cord and may contribute to the regeneration of nervous tissue after injury. Conversely, CGRP is derived from dorsal root ganglion when synthesized in the dorsal horn of the spinal cord and may be linked to the transmission of pain. In the trigeminal vascular system, the cell bodies of the trigeminal ganglion are the main source of CGRP. CGRP is thought to play a role in cardiovascular homeostasis and nociception. In the heart, CGRP acts as a chronotrope by increasing heart rate. Apart from these attributes, CGRP is known to modulate the autonomic nervous system and plays a role in ingestion. CGRP has moderate effects on calcium homeostasis compared to its extensive actions in other areas, such as the autonomic nervous system.
During the first episode of the series, Collins and her campmates were required to travel into the jungle via helicopter, however she refused to do so, becoming hysterical before the helicopter had taken off and was instead driven into camp. She and her fellow campmates Carl Fogarty, Craig Charles, Nadia Forde and Vicki Michelle were sent to live in the basic camp, "Celebrity Slammer", following a public vote prior to the series launch. After believing she had caught malaria and struggling with the lack of food, Collins withdrew from the series on the third day after spending 72 hours in the jungle. She was subject to online trolling and ridicule from the show's viewers after her exit, later revealing that she was attacked and robbed by a former boyfriend the day prior to flying out to Australia, as well as her mother's health issues, which contributed towards her reasons for quitting the show. Collins received a reduced fee for her appearance, the entirety of which she donated to the charity Save the Children. In August 2015, following the conclusion of the fifteenth series of The Only Way Is Essex, Collins announced she would be leaving the show after four years. However, she subsequently returned for the Christmas special episode of the sixteenth series and continued to appear on the programme sporadically for the next four years, with her appearances becoming less frequent in latter series due to her other commitments. She made her final appearance on the show during the twenty-fifth series in November 2019.
=== Names === Vortioxetine was previously sold under the brand name Brintellix in the United States, but in May 2016, the US Food and Drug Administration (FDA) approved a name change to Trintellix in order to avoid confusion with the blood-thinning medication Brilinta (ticagrelor). Other brand names include Torvox, Vantaxa, Voxigain, Trivoxetin, Vipca, Vortica, Vatoin, Xomat, Vortidif.
=== Legal status === Nemolizumab was approved for medical use in the United States in August 2024. The FDA granted the application breakthrough therapy designation. In December 2024, the Committee for Medicinal Products for Human Use of the European Medicines Agency adopted a positive opinion, recommending the granting of a marketing authorization for the medicinal product Nemluvio, intended for the treatment of atopic dermatitis and prurigo nodularis. The applicant for this medicinal product is Galderma International. Nemolizumab was authorized for medical use in the European Union in February 2025.
Sources: en.wikipedia.org
Coolies and POWs known as PIM (Prisonniers Internés Militaires, which is basically the same as POW) were civilians used by the army as logistical support personnel. During the battle of Dien Bien Phu, coolies were in charge of burying the corpses—during the first days only, after they were abandoned, hence giving off a terrible smell, according to veterans—and they had the dangerous job of gathering supply packets delivered in drop zones while the Việt Minh artillery was firing hard to destroy the crates. The Việt Minh also used thousands of coolies to carry the Chu-Luc (regional units) supplies and ammunition during assaults. The PIM were civilian males old enough to join Bảo Đại's army. They were captured in enemy-controlled villages, and those who refused to join the State of Vietnam's army were considered prisoners or used as coolies to support a given regiment.
=== Post-translational modifications and cofactors === Phosphorylation of the N-terminus not only prevents MDM2 binding but also facilitates the recruitment of cofactors. Pin1 enhances conformational changes in p53, while p300 and PCAF acetylate the C-terminus, exposing the DNA-binding domain and enhancing transcriptional activation. Conversely, deacetylases such as Sirt1 and Sirt7 remove these modifications, suppressing apoptosis and promoting cell survival. Some oncogenes can also activate p53 indirectly by inhibiting MDM2.
== Education == Shulman earned a Bachelor of Science degree in biophysics from the University of Michigan in 1974, graduating with high honors and distinction. He received both his M.D. and Ph.D. in physiology from Wayne State University in 1979. From 1979 to 1981, he completed his internship and residency training in internal medicine at Duke University Medical Center. He then completed his clinical and research fellowship in endocrinology and metabolism at Massachusetts General Hospital/Harvard Medical School from 1981 to 1984.
=== Nomenclature === The usage of Roman numerals rather than eponyms or systematic names was agreed upon during annual conferences (starting in 1955) of hemostasis experts. In 1962, consensus was achieved on the numbering of factors I–XII. This committee evolved into the present-day International Committee on Thrombosis and Hemostasis (ICTH). Assignment of numerals ceased in 1963 after the naming of Factor XIII. The names Fletcher Factor and Fitzgerald Factor were given to further coagulation-related proteins, namely prekallikrein and high-molecular-weight kininogen, respectively. Factor VI is unassigned, as accelerin was found to be activated Factor V.
=== 2012–2018: Change in pace === He starred alongside former co-star Steve Carell in the Don Scardino-directed comedy film The Incredible Burt Wonderstone (2013). Carrey played Steve Gray, a dangerous street magician who overshadows the formerly successful magician Burt Wonderstone (played by Carell). The film was released in March 2013 to mixed reviews and underperformed significantly at the box office, grossing just over $27 million on a $30 million budget. Around the same time, he appeared in Kick-Ass 2 (also 2013) as Colonel Stars and Stripes. He retracted support for the film two months prior to its release. He issued a statement via his Twitter account that, in light of the Sandy Hook Elementary School shooting, "Now in all good conscience I cannot support that level of violence." Peter Farrelly said in April 2012 that Carrey and Jeff Daniels would return for a Dumb and Dumber sequel, Dumb and Dumber To, with the Farrelly brothers writing and directing and a planned September 2012 production start. In June, however, Carrey's representative said Carrey had left the project because the comedian felt New Line and Warner Bros. were unenthusiastic toward it. However, on October 1, 2012, Yahoo!'s The Yo Show carried the news item that the script was complete and that the original actors, Carrey and Daniels, would be reprising their roles. The plot involved one of the characters having sired a child and needing to find them to obtain a kidney. Dumb and Dumber To was released in November 2014.
Sources: en.wikipedia.org
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.
Epithalamin refers to a crude preparation derived from bovine pineal tissue, which contains many components. Epitalon is a single synthetic tetrapeptide identified from that material and produced by chemical synthesis. The two names are sometimes confused because early reports treated the synthetic peptide as an active fragment of the extract.
It has been registered for clinical use in Russia, where it is associated with a small family of short peptides. In most other jurisdictions it is not an approved medicine and is traded as a research chemical. Regulatory status varies by country and changes over time.
It is a synthetic tetrapeptide built from alanine, glutamate, aspartate and glycine. The four residues are joined by standard peptide bonds, giving a linear chain rather than a branched structure.