The short version of synthetic heptapeptide fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-08-01. Anything still debated is marked as such rather than presented as settled.
Development took place during the 1980s at institutes of the Russian Academy of Sciences, where peptide fragments of ACTH were screened for cognitive and neuroprotective effects. The compound received regulatory approval in Russia as a nasal preparation, marketed for conditions such as ischemic stroke, transient ischemic attacks, and optic nerve disorders. Registration in other countries has not followed. Most published clinical reports originate from a small number of Russian research groups, and independent replication outside that setting remains limited. The regulatory status therefore differs sharply between Russia and the rest of the world.
Laboratory work points toward modulation of neurotrophic signaling, particularly expression of brain-derived neurotrophic factor and nerve growth factor in hippocampal tissue. Studies also describe effects on monoamine turnover, inflammatory mediators, and oxidative markers. These observations come mainly from animal models and cultured cells, so the causal chain in humans is not firmly established. Whether the reported molecular changes translate into measurable clinical benefit is an open question. Reviews generally present the mechanism as plausible rather than demonstrated.
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.
Development of the compound took place in the Soviet Union during the 1980s, largely through peptide research groups affiliated with the Shemyakin-Ovchinnikov Institute and Moscow State University. Investigators screened fragments of adrenocorticotropic hormone for activity on the central nervous system while attempting to separate cognitive effects from hormonal ones. The shortened sequence was selected because it retained behavioral activity in animal models without stimulating corticosteroid release. Early publications described the molecule as an ACTH(4-10) analog.
Published research on this peptide originates mainly from Russian laboratories, and the wider international literature is comparatively thin. Studies have used rodent models of stroke, hypoxia, and memory tasks, with a smaller number of human trials reported. Reported outcomes include changes in attention and memory measures, along with effects on neurotrophic factor expression in some experiments. Small sample sizes, inconsistent dosing protocols, and limited independent replication are widely noted limitations, so the strength of the clinical evidence remains an open question.
Semax is a synthetic heptapeptide whose sequence is Met-Glu-His-Phe-Pro-Gly-Pro. The first four residues correspond to the ACTH(4-10) fragment, while the terminal Pro-Gly-Pro extension was added to improve metabolic stability. Its molecular formula is C37H51N9O10S and its monoisotopic mass is approximately 813.9 Da. The compound is classified as a peptide research chemical and as a registered pharmaceutical product in Russia, but it does not hold marketing approval in the European Union or the United States. Naming conventions vary across supplier catalogs.
| Property | Value | Notes |
|---|---|---|
| Sequence | Met-Glu-His-Phe-Pro-Gly-Pro | Heptapeptide; ACTH(4-10) analog extended at C-terminus |
| Molecular mass | ~813.9 Da | Free peptide, unmodified |
| Appearance | White to off-white powder | Typical lyophilized solid |
| Solubility | Soluble in water and saline | Also soluble in common aqueous buffers |
| Storage (solid) | -20 °C, desiccated | Protect from moisture and repeated thawing |
Tomatoes, with their umami flavor, are extensively used in Mediterranean cuisine as a key ingredient in pizza and many pasta sauces. Tomatoes are used in Spanish gazpacho and Catalan pa amb tomàquet. The tomato is a crucial and ubiquitous part of Middle Eastern cuisine, served fresh in salads (e.g., Arab salad, Israeli salad, Shirazi salad and Turkish salad), grilled with kebabs and other dishes, made into sauces, and so on. Tomatoes were gradually incorporated into Indian curry dishes after Europeans introduced them. A Kashmiri curry, rogan josh, often contains tomato; it may originally have been colored red with chili pepper, and tomatoes may characterize the Punjabi version of the dish. The modern British curry tikka masala often has a tomato and cream sauce.
Leptomeningeal cancer is a rare complication of cancer in which the disease spreads from the original tumor site to the meninges surrounding the brain and spinal cord. This leads to an inflammatory response, hence the alternative names neoplastic meningitis (NM), malignant meningitis, or carcinomatous meningitis. The term leptomeningeal (from the Greek lepto, meaning 'fine' or 'slight') describes the thin meninges, the arachnoid and the pia mater, between which the cerebrospinal fluid is located. The disorder was originally reported by Eberth in 1870. It is also known as leptomeningeal carcinomatosis, leptomeningeal disease (LMD), leptomeningeal metastasis, meningeal metastasis and meningeal carcinomatosis. It occurs with cancers that are most likely to spread to the central nervous system. The most common cancers that spread to the leptomeninges are breast cancer, lung cancer, and melanomas because they can metastasize to the subarachnoid space in the brain which offers a hospitable environment for the growth of metastatic tumor cells. Individuals whose cancer has spread to an area of the brain known as the posterior fossa have a greater risk of developing a leptomeningeal cancer. The condition can also arise from primary brain tumor like medulloblastoma. Leptomeningeal disease is becoming more evident because cancer patients are living longer and many chemotherapies cannot reach sufficient concentrations in the spinal fluid to kill the tumor cells.
Endoneurium. Each nerve axon, or fiber is surrounded by the endoneurium, which is also called the endoneurial tube, channel or sheath. This is a thin, delicate, protective layer of connective tissue. Perineurium. Each nerve fascicle containing one or more axons, is enclosed by the perineurium, a connective tissue having a lamellar arrangement in seven or eight concentric layers. This plays a very important role in the protection and support of the nerve fibers and also serves to prevent the passage of large molecules from the epineurium into a fascicle. Epineurium. The epineurium is the outermost layer of dense connective tissue enclosing the (peripheral) nerve.
vapor pressure Also equilibrium vapor pressure. The pressure exerted by a vapor which is in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system. It is commonly described as the tendency of particles to spontaneously escape from the liquid or solid state into the gaseous state and is used as an indication of a liquid's evaporation rate.
Sources: en.wikipedia.org
== Awards and honors == Csaba Horváth Medal of the Connecticut Separation Science Council (2001) Keene P. Dimick Award in Chromatography of the Society of Analytical Chemists of Pittsburgh (1998) Jubilee Award of the International Symposium on Capillary Chromatography (1998) Golden Diploma from Budapest Technical University (1995) Elected Honorary Member, Hungarian Chemical Society (1992) Marcel J. E. Golay Award of the International Symposium on Capillary Chromatography (1992) M. S. Tswett Medal of the Russian Chromatography Society (1991) Pioneer in the Development of Analytical Instrumentation of the first James L. Waters Symposium at the 41st PittCon (1990) National Award in Chromatography of the American Chemical Society (1985) A. J. P. Martin Gold Award of the Chromatography Discussion Group (1982) Anniversary Medal of Tartu University (Estonia, 1981) L.S. Palmer Award of the Minnesota Chromatography Forum (1980) Anniversary M.S. Tswett Chromatography Medal of the All-Union Scientific Council on Chromatography of the USSR Academy of Sciences (1979) M.S. Tswett Award in Chromatography of the International Symposium on Advances in Chromatography (1978)
Albany ( AL-bə-nee) is a city in and the county seat of Linn County, Oregon, and is the 11th most populous city in the state. Albany is located in the Willamette Valley at the confluence of the Calapooia River and the Willamette River in both Linn and Benton counties, just east of Corvallis and south of Salem. It is predominantly a farming and manufacturing city that settlers founded around 1848. As of the 2020 United States census, the population of Albany, Oregon was 56,472. Albany has a home rule charter, a council–manager government, and a full-time unelected city manager. The city provides the population with access to over 30 parks and trails, a senior center, and many cultural events such as the Northwest Art & Air Festival, River Rhythms, Summer Sounds and Movies at Monteith. In addition to farming and manufacturing, the city's economy depends on retail trade, health care, and social assistance. In recent years the city has worked to revive the downtown shopping area, with help from the Central Albany Revitalization Area.
Cannabis tea, a cannabis-infused drink prepared by steeping various parts of the cannabis plant in hot or cold water Enviga, a carbonated green tea drink promoted with bogus health claims Jun, a fermented drink made from green tea and honey Kefir, a fermented dairy product Kvass, a traditional fermented drink made from bread List of unproven or disproven cancer treatments Mushroom tea, an infusion of mushrooms in water, made by using edible/medicinal mushrooms (such as lingzhi mushroom) or psychedelic mushrooms (such as Psilocybe cubensis) Tibicos, or "water kefir"
==== pVI ==== pVI has been widely used for the display of cDNA libraries. The display of cDNA libraries via phage display is an attractive alternative to the yeast-2-hybrid method for the discovery of interacting proteins and peptides due to its high throughput capability. pVI has been used preferentially to pVIII and pIII for the expression of cDNA libraries because one can add the protein of interest to the C-terminus of pVI without greatly affecting pVI's role in phage assembly. This means that the stop codon in the cDNA is no longer an issue. However, phage display of cDNA is always limited by the inability of most prokaryotes in producing post-translational modifications present in eukaryotic cells or by the misfolding of multi-domain proteins. While pVI has been useful for the analysis of cDNA libraries, pIII and pVIII remain the most utilized coat proteins for phage display.
Bohr model Also Rutherford–Bohr model. A model of the general structure of the atom proposed by Niels Bohr and Ernest Rutherford in 1913, featuring a small, dense nucleus of positively charged particles surrounded by orbiting electrons, which are attracted to the nucleus by electrostatic forces. This interpretation replaced several earlier hypotheses and quickly became the prevailing standard model for depicting atomic structure.
Sources: en.wikipedia.org
Semax is a synthetic seven-amino-acid peptide derived from a fragment of corticotropin. It is used in Russia as a nasal preparation, while elsewhere it is studied as a research compound. It is not approved as a medicine in most countries.
Its sequence corresponds to the 4-10 region of corticotropin extended by three residues. This fragment lacks the region responsible for adrenal steroid release, so it is explored for neural rather than hormonal effects. The relationship explains the compound's classification among ACTH-derived peptides.
It holds approval in Russia for several neurological indications as a nasal spray or drop formulation. Regulatory agencies in the United States and the European Union have not approved it. Products sold elsewhere are generally labeled for research use only.
It is a synthetic peptide of seven amino acids. Its backbone corresponds to a fragment of adrenocorticotropic hormone extended at the carboxyl end. The material is distributed as a lyophilized solid for laboratory use.