ACTH(4-10) 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 2026-02-22. Numbers and descriptions here follow the published literature rather than marketing material.
Regulatory status varies sharply by country. Semax is registered for medical use in Russia, where it appears in formularies as a nasal solution, and it also holds registration in a small number of neighbouring states. It has no approval from the United States Food and Drug Administration or the European Medicines Agency, and it is not a scheduled controlled substance in most jurisdictions. Elsewhere it circulates mainly as laboratory material, so purity documentation comes from suppliers rather than from a national pharmacopoeia.
Semax is a synthetic peptide created in the Soviet Union during the early 1980s by researchers working in Moscow. It was built from the short adrenocorticotropic hormone fragment known as ACTH(4-10), and the chain was then extended with three additional amino acids. The resulting molecule was named semax and entered clinical use in Russia in 1994. It is generally described as a nootropic and neuroprotective agent rather than as a hormone analogue.
Later generations of the molecule include an N-acetylated form and an amidated form, both marketed online alongside the parent peptide. These variants differ in terminal chemistry and stability, and they are frequently discussed in the same breath even though they have not been compared in controlled trials. Supply outside formal healthcare systems comes largely from laboratories that synthesize peptides to order. Purity and identity of these materials vary widely, and no single body oversees the international trade.
Semax is a synthetic heptapeptide developed in the Soviet Union during the 1980s by researchers at the Institute of Molecular Genetics in Moscow. It was designed as a truncated analog of adrenocorticotropic hormone, retaining only the fragment spanning residues four through ten. Investigators sought a peptide that would preserve the cognitive effects associated with ACTH while eliminating the hormonal stimulation of the adrenal cortex. The compound entered clinical use in Russia during the following decade.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic heptapeptide | Analogue of the ACTH(4-10) fragment |
| Amino acid sequence | Met-Glu-His-Phe-Pro-Gly-Pro | Single-letter form MEHFPGP |
| Molecular formula | C37H51N9O10S | Free peptide, nominal mass near 814 Da |
| First registration | 1994, Russia | Nasal formulation for neurological indications |
| Typical purity grade | 95% or higher by HPLC | Research material; higher grades used as reference standards |
Laboratory descriptions of the material are consistent across suppliers. It appears as a white to off-white lyophilized powder that dissolves readily in water and in polar organic solvents such as dimethyl sulfoxide. Aqueous solutions are clear and colorless at low concentrations. Because the peptide contains methionine, oxidation at the sulfur atom is a recognized degradation pathway, and handling notes usually call for protected, desiccated storage. Reported purity for research-grade lots is generally above 95 percent as measured by reversed-phase high-performance liquid chromatography.
The compound is registered in Russia as a pharmaceutical product, most commonly formulated as a nasal solution, and has been used in that setting since the 1990s. Outside that jurisdiction it is generally handled as a research chemical rather than an approved medicine. Regulatory status therefore differs sharply between countries, and material sold internationally may not correspond to the Russian pharmaceutical formulation. Documentation with commercial samples is typically limited to a certificate of analysis covering purity and identity, not clinical status or local legal classification.
Semax is a synthetic heptapeptide with the sequence Met-Glu-His-Phe-Pro-Gly-Pro. It corresponds to the ACTH(4-7) fragment extended at the C-terminus by a Pro-Gly-Pro tripeptide, an addition intended to slow enzymatic breakdown. The molecular formula is C37H51N9O10S and the molecular mass is approximately 814 daltons. In the literature it is often described as an ACTH(4-10) analog, although that label reflects a naming convention as much as a precise structural relationship. The compound was developed in Russia and remains most closely associated with that research tradition.
=== Treatment approach === Any interventions done are matched with the needs of each individual in an ethical and respected manner. Health belief model encourages increasing individuals' perceived susceptibility to negative health outcomes and making individuals aware of the severity of such negative health behavior outcomes. E.g. through health promotion messages. In addition, the health belief model suggests the need to focus on the benefits of health behaviors and the fact that barriers to action are easily overcome. The theory of planned behavior suggests using persuasive messages for tackling behavioral beliefs to increase the readiness to perform a behavior, called intentions. The theory of planned behavior advocates the need to tackle normative beliefs and control beliefs in any attempt to change behavior. Challenging the normative beliefs is not enough but to follow through the intention with self-efficacy from individual's mastery in problem solving and task completion is important to bring about a positive change. Self efficacy is often cemented through standard persuasive techniques.
Negros was originally called Buglas, an old Hiligaynon word thought to mean "cut off", as the island was thought to have been separated from a larger landmass. It was also known as Mamaylan and Panilougon among Cebuano-speaking Visayans. Among its earliest inhabitants were the aboriginal Ata, one of several Negrito Indigenous Peoples dispersed throughout Southeast Asia that possesses a unique culture. The westernmost portions of the island soon fell under the nominal rule of the Kedatuan of Madja-as based on the neighboring islands of Panay and Guimaras, while the eastern coasts were influenced by the Rajahnate of Cebu from the adjacent island of Cebu.
=== Gastrointestinal disorders === TPN may be the only feasible option for providing nutrition to patients who do not have a functioning gastrointestinal tract or who have disorders requiring complete bowel rest, including bowel obstruction, short bowel syndrome, gastroschisis, gastroparesis, prolonged diarrhea regardless of its cause, very severe Crohn's disease or ulcerative colitis, and certain pediatric GI disorders including congenital GI anomalies and necrotizing enterocolitis.
The Pirogov Russian National Research Medical University (formerly known as the Russian State Medical University) is a medical institution of higher education in Moscow, founded in 1906. This university is fully accredited and recognized by Russia's Ministry of Education and Science, and it is under the authority of the Ministry of Health and Social Development. Named after Russian surgeon and pedagogue N.I. Pirogov (1810–1888), the university is one of the largest medical institutions in Russia, and the first in the country allowing women to complete degrees. Moscow is one of the financial centers of the Russian Federation and the Commonwealth of Independent States (CIS), and the city is known for business schools. Among these are the Financial University under the Government of the Russian Federation, the Plekhanov Russian University of Economics, the State University of Management, and the National Research University—Higher School of Economics. These schools offer undergraduate degrees in management, finance, accounting, marketing, real estate, and economic theory; in addition, the schools offer master's degrees (including Masters of Business Administration [MBAs]). Most of these schools have branches in other regions of Russia and in other countries.
Soft corals have no solid exoskeleton as such. However, their tissues are often reinforced by small supportive elements known as sclerites made of calcium carbonate. The polyps of soft corals have eight-fold symmetry, which is reflected in the Octo in Octocorallia. Soft corals vary considerably in form, and most are colonial. A few soft corals are stolonate, but the polyps of most are connected by sheets of tissue called coenosarc, and in some species these sheets are thick and the polyps deeply embedded in them. Some soft corals encrust other sea objects or form lobes. Others are tree-like or whip-like and have a central axial skeleton embedded at their base in the matrix of the supporting branch. These branches are composed of a fibrous protein called gorgonin or of a calcified material.
Sources: en.wikipedia.org
peptide formylkynurenine Thus, the two substrates of this enzyme are peptide tryptophan and O2, whereas its product is peptide formylkynurenine. This enzyme belongs to the family of oxidoreductases, specifically those acting on single donors with O2 as oxidant and incorporation of two atoms of oxygen into the substrate (oxygenases). The oxygen incorporated need not be derived from O2. The systematic name of this enzyme class is peptide-tryptophan:oxygen 2,3-oxidoreductase (decyclizing). Other names in common use include pyrrolooxygenase, peptidyltryptophan 2,3-dioxygenase, and tryptophan pyrrolooxygenase.
Acquired C1 esterase inhibitor deficiency Acute urticaria Adrenergic urticaria Anaphylaxis Aquagenic urticaria Autoimmune urticaria Cholinergic urticaria Chronic urticaria (ordinary urticaria) Cold urticaria Dermatographism (dermographism) Episodic angioedema with eosinophilia (Gleich's syndrome) Exercise urticaria (exercise-induced urticaria) Galvanic urticaria Heat urticaria Hereditary angioedema (Quincke's edema) Localized heat contact urticaria Mast cell-independent urticaria Physical urticaria Primary cold contact urticaria Pressure urticaria (delayed pressure urticaria) Reflex cold urticaria Schnitzler syndrome Secondary cold contact urticaria Solar urticaria Systemic capillary leak syndrome Urticarial allergic eruption Urticaria-like follicular mucinosis Vibratory angioedema
MDMA may increase the risk of cardiac valvulopathy in heavy or long-term users due to activation of serotonin 5-HT2B receptors. MDMA induces cardiac epigenetic changes in DNA methylation, particularly hypermethylation changes.
In the lateral hypothalamus, leptin inhibits hunger by counteracting the effects of neuropeptide Y, a potent hunger promoter secreted by cells in the gut and in the hypothalamus counteracting the effects of anandamide, another potent hunger promoter that binds to the same receptors as THC In the medial hypothalamus, leptin stimulates satiety by promoting the synthesis of α-MSH, a hunger suppressant Thus, a lesion in the lateral hypothalamus causes anorexia (due to a lack of hunger signals) and a lesion in the medial hypothalamus causes excessive hunger (due to a lack of satiety signals). This appetite inhibition is long-term, in contrast to the rapid inhibition of hunger by cholecystokinin (CCK) and the slower suppression of hunger between meals mediated by PYY3-36. The absence of leptin (or its receptor) leads to uncontrolled hunger and resulting obesity. Fasting or following a very-low-calorie diet lowers leptin levels. Leptin levels change more when food intake decreases than when it increases. The dynamics of leptin due to an acute change in energy balance may be related to appetite and eventually, to food intake rather than fat stores.
Sources: en.wikipedia.org
Registered medical products are most often 0.1% nasal drops. Research suppliers ship lyophilized powder, usually in milligram quantities, which is dissolved before use. The active peptide is the same in both cases; presentation and excipients differ.
No. The peptide is synthetic, although it is modelled on a fragment of a naturally occurring hormone. ACTH(4-10) is generated when ACTH is cleaved, but the Pro-Gly-Pro extension is not a known endogenous sequence. It is therefore a designed analogue rather than a natural metabolite.
The label reflects reported effects on attention, memory and recovery after neurological injury in regional clinical reports. Those reports are mostly small and have not been widely replicated outside the region. The classification is descriptive and does not imply a single defined mechanism.
It originated at the Institute of Molecular Genetics in Moscow during the 1980s. The work was carried out by a Russian research group that specialized in peptide neuropharmacology.