Everything below concerns Semax. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-08-01. Numbers and descriptions here follow the published literature rather than marketing material.
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.
Russian regulatory authorities approved the peptide for nasal administration, and it remains listed in the national pharmacopoeia under several trade names. Documented indications include acute ischemic stroke, transient ischemic attacks, traumatic brain injury, and certain ophthalmological and neurological conditions. Physicians also prescribe it for cognitive complaints in older patients, although the evidence base for that use is thinner. Outside Russia and a few neighboring states, the substance is not an approved medicine and is sold instead as a research chemical.
Lyophilised powder is normally kept at -20 °C in a desiccated container, with some suppliers recommending -80 °C for long-term archival storage. Repeated freeze-thaw cycles are the most common cause of avoidable loss, so aliquoting before freezing reduces variability between working sessions. Dissolved peptide is far less stable than the dry solid and is usually prepared fresh or held briefly at 4 °C. Aqueous solutions support both hydrolysis of the backbone and oxidation of the N-terminal methionine, and these two routes dominate degradation under ordinary laboratory conditions.
Identity and purity are confirmed with reversed-phase high-performance liquid chromatography, typically monitored at 214 nanometres where the peptide bond absorbs. Mass spectrometry, either electrospray or MALDI-TOF, verifies molecular mass against the theoretical value and detects truncation or adduct formation. Amino acid analysis and peptide mapping provide additional confirmation when required. The most frequently reported impurities are deletion sequences from incomplete coupling, methionine sulfoxide from oxidation, and dimeric species formed through non-covalent aggregation. Impurity profiles depend strongly on the synthesis and purification route chosen by the producer.
| Property | Value | Notes |
|---|---|---|
| Molecular class | Synthetic heptapeptide | Analog of an ACTH fragment |
| Amino acid length | Seven residues | Met-Glu-His-Phe-Pro-Gly-Pro |
| Origin | Moscow, 1980s | Institute of Molecular Genetics |
| Approved regions | Russia and some neighboring states | Not cleared in Western markets |
| Common trade names | Multiple national brands | Sold as a nasal formulation |
Clinical evidence consists largely of small trials with modest sample sizes, often without independent replication. Reported endpoints include cognitive scores, recovery after stroke, and visual function, but study designs vary widely and few trials meet contemporary reporting standards. Systematic reviewers have noted a high risk of bias in several of these reports. No large multicenter trial conducted outside Russia has been published. The compound is therefore best described as investigational in most jurisdictions, with its clinical role still unresolved.
Semax is a synthetic heptapeptide with the sequence Met-Glu-His-Phe-Pro-Gly-Pro. Its chain combines the first seven residues of corticotropin with a C-terminal proline-glycine-proline extension, a modification intended to slow enzymatic breakdown. The free peptide has a molecular mass near 813.9 daltons. It belongs to the class of ACTH-derived fragments studied for central nervous system activity rather than for adrenal steroid stimulation. This structural relationship to a natural hormone fragment is the usual starting point for describing the compound in the literature.
The peptide is prone to several degradation pathways. Oxidation of the methionine residue produces a sulfoxide that elutes close to the parent peak in many chromatographic systems. Hydrolysis of peptide bonds and deamidation of susceptible residues in related sequences also reduce purity over time. Lyophilised material kept dry at minus twenty degrees Celsius and shielded from light is the most stable form commonly described in laboratory practice.
Material sold for laboratory use varies widely in stated purity and documentation. A certificate of analysis should list the analytical method, the column and detector used, and the observed purity value. Independent verification by an outside laboratory is the practical way to confirm identity when documentation is absent or internally inconsistent. Regulatory status differs by country, and a product legal in one jurisdiction may be unapproved or controlled in another.
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10, 2 November 2009 Marko Attila Hoare, The EU and the Georgian war: Saying 'everyone is to blame' isn't good enough, Henry Jackson Society, 25 October 2009 Ministry of Foreign Affairs of Georgia, MAIN FINDINGS OF THE “TAGLIAVINI REPORT”, 10 November 2009 (in Russian) Асмус: война в Грузии – попытка России изменить систему евробезопасности, ru.DELFI.lt, 24 January 2010 (in Russian) Blogger cyxymu: Russo-Georgian War. After three years, Echo of Moscow, 8 August 2011 (in Russian) 8 myths about the Russo-Georgian war 08.08.08, 8 August 2011 (in Russian) Andrey Illarionov, Russo-Georgian War. Who was the first? (in Russian) Pavel Felgenhauer, The first part of the war with Georgia, Zhurnalny Zal, 9 April 2012 (in Russian) "A Lost Day". All the truth about the 08.08.08 war (in Russian) "A Lost Day". Film about the war 08.08.08, Echo of Moscow, 8 August 2012 (in Russian) Andrey Illarionov, Why did Medvedev award the order of Zhukov to 10th Special Forces Brigade?, Echo of Moscow, 2 November 2013 damoukidebloba.com, RUSSIAN PEACEKEEPERS IN THE 2008 AUGUST WAR, 21 October 2015. Russian translation. (in Russian) Война 08.08.08. 8 лет спустя, Inform Napalm, 7 August 2016 Egeuene Chausovsky, Looking Back on the Russian-Georgian War, 10 Years Later, Stratfor, 7 August 2018 (in Russian) Medvedev or Putin - who decided to send troops into Georgia, Russian BBC, 7 August 2016
== Research == There is currently a great deal of research being conducted on hemostasis. The most current research is based on genetic factors of hemostasis and how it can be altered to reduce the cause of genetic disorders that alter the natural process hemostasis. Von Willebrand disease is associated with a defect in the ability of the body to create the platelet plug and the fibrin mesh that ultimately stops the bleeding. New research is concluding that the von Willebrand disease is much more common in adolescence. This disease negatively hinders the natural process of Hemostasis causing excessive bleeding to be a concern in patients with this disease. There are complex treatments that can be done including a combination of therapies, estrogen-progesterone preparations, desmopressin, and Von Willebrand factor concentrates. Current research is trying to find better ways to deal with this disease; however, much more research is needed in order to find out the effectiveness of the current treatments and if there are more operative ways to treat this disease.
Sources: en.wikipedia.org
2011: Icon acquired Oxford Outcomes, an international health outcomes consultancy and Firecrest Clinical, a technology provider specialising in site performance and study management 2012: Icon acquired PriceSpective, a global value strategy consultancy and Chinese CRO, BeijingWits 2013: Icon acquired staffing and FSP providers, ClinForce and Assent and Akos, an EU provider of pharmacovigilance and drug safety services 2014: Icon acquired Aptiv Solutions, a market leader in adaptive trial design and execution 2015: Icon acquired MediMedia Pharma Solutions to enhance market access and scientific communications capabilities, and PMG Research Inc., an integrated network of clinical research sites in the US 2016: Icon acquired Clinical Research Management Inc., to extend its presence in the government-sponsored research market 2017: Icon acquired MAPI Group, thereby becoming the world's second-largest provider of late-phase services 2019: Icon acquired Symphony Clinical Research, a leading provider of at-home patient services and site-support services; MediNova, an integrated network of clinical research sites across EMEA; and MolecularMD, to enhance its laboratory offerings in molecular diagnostic testing and immunohistochemistry 2020: Icon acquired MedPass International, a leading European medical device CRO, regulatory and reimbursement consultancy 2021: Icon acquired PRA Health Sciences, a competitor offering clinical research services, for US$12 billion.
==== Scoring binding predictions ==== Protein design energy functions must be adapted to score binding predictions because binding involves a trade-off between the lowest-energy conformations of the free proteins (EP and EL) and the lowest-energy conformation of the bound complex (EPL):
=== Immune regulation === ITGA1 is expressed on multiple immune cell populations, including T cells, natural killer T (NKT) cells, and natural killer (NK) cells. It contributes to innate and adaptive immune responses by regulating immune cell adhesion, migration, tissue retention, inflammatory signaling, cell growth, and differentiation. In human decidual NK (dNK) cells, ITGA1 regulates adhesion, migration, and cytotoxic activity. Blocking CD49a (aka ITGA1) limits dNK migration and adhesion while increasing expression of cytotoxic molecules such as perforin, granzyme B, and interferon-γ, indicating that ITGA1 maintains the specialized immune-regulatory phenotype of dNK cells during pregnancy. ITGA1 also contributes to immune cell retention and tissue maintenance through collagen-dependent signaling. Collagen binding activates pathways that promote immune cell proliferation and inflammatory cytokine secretion and may regulate angiogenic responses through increased ITGA1 expression on endothelial and mesangial cells.
Sources: en.wikipedia.org
== Names == It was initially introduced as the prodrug mycophenolate mofetil (MMF, brand name Cellcept) to improve oral bioavailability. The salt mycophenolate sodium has also been introduced. Enteric-coated mycophenolate sodium (EC-MPS) is an alternative MPA formulation. MMF and EC-MPS appear to be equal in benefits and safety.
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=== Temporary basal rates === Since the basal insulin is provided as a rapid-acting insulin, the basal insulin can be immediately increased or decreased as needed with a temporary basal rate. Examples when this is helpful include:
==== Electronics ==== Because of low density and good mechanical and electrical properties, magnesium is used for manufacturing of mobile phones, laptop and tablet computers, cameras, and other electronic components. It was used as a premium feature because of its light weight in some 2020 laptops.
Sources: en.wikipedia.org
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.
It is registered as a medicine in Russia and has been used clinically there for decades. No regulatory agency in Western Europe or North America has approved it for any indication.
Semax corresponds to the four-to-ten fragment of adrenocorticotropic hormone. Because it omits the first three residues, it lacks the adrenal-stimulating action of the full hormone.
Reversed-phase HPLC gives the main purity figure, most often with UV detection near 214 nanometres. Mass spectrometry then confirms the molecular mass. Together the two methods distinguish a correct sequence from a closely related impurity.