The short version of Neurotrophic signalling fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-05-09 and is reviewed periodically as new material appears.
The parent fragment ACTH(4-10) carries the sequence Met-Glu-His-Phe-Arg-Trp-Gly. Semax replaces the arginine and tryptophan positions with a proline-glycine-proline tail, giving Met-Glu-His-Phe-Pro-Gly-Pro. That change removes residues associated with adrenal stimulation, so the peptide does not drive cortisol release the way full ACTH does. This distinction shapes how the compound is grouped in the literature, where it sits with neuropeptides and peptide neuromodulators rather than with corticosteroids.
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.
Verification of a supplied batch generally combines a certificate of analysis with independent testing, because certificates are self-reported documents. A typical package includes a chromatographic trace, a mass spectrum, and a stated water or counter-ion content. Batch-to-batch consistency matters more than a single purity figure when results are compared across experiments. No single mandatory standard governs research-grade peptide release, so laboratories are expected to define their own acceptance criteria. Residual trifluoroacetate from purification is a frequently overlooked counter-ion.
Lyophilized material is chemically stable for extended periods when kept dry, cold, and protected from light. The powder is hygroscopic, so vials should be warmed to room temperature before opening to reduce condensation on the contents. Once dissolved, the peptide is far less stable because peptide bonds are susceptible to hydrolysis and the methionine residue can oxidize. Solutions are typically aliquoted and held at 2-8 °C for short intervals or frozen for longer ones, and repeated freeze-thaw cycles should be avoided.
| 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 |
The proposed mechanism centres on neurotrophic signalling rather than direct receptor activation. Semax is reported to increase expression of brain-derived neurotrophic factor and nerve growth factor in several brain regions, and to shift the balance between excitatory and inhibitory neurotransmitter systems. Interaction with melanocortin receptors has been suggested because of the parent ACTH fragment. Many of these findings come from rodent studies, and the extent to which they translate to human physiology remains an open question.
Scientific literature on semax is unevenly distributed. A substantial share of published work originates from a small number of laboratories in Russia, while independent replication elsewhere is limited. Human data consist mostly of small trials with short follow-up, and several reported outcomes rely on subjective rating scales. Questions about how much intact peptide reaches the central nervous system after nasal administration, and how long it persists there, are still unresolved. The compound is best described as an active research subject rather than a settled pharmacological agent.
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.
Development is attributed to researchers at the Institute of Molecular Genetics in Moscow during the early 1980s, building on earlier Soviet work with ACTH fragments. Russian regulatory approval followed for intranasal use, and the compound has remained commercially available there for decades. Most published human data originate from Russian and, later, some Eastern European clinical reports, which are not always accessible in English translation. Outside that region the material is generally handled as a research chemical rather than a licensed medicine.
Regulatory status differs sharply between jurisdictions. In Russia the peptide is registered as a prescription nasal preparation, while agencies such as the United States Food and Drug Administration have not approved it for any indication. Products sold elsewhere are typically labeled for laboratory research only, and such labels shift responsibility for safe handling to the purchaser. Because the same name covers pharmaceutical-grade nasal drops and bulk research powder, identity and purity documentation becomes the main practical concern when comparing sources.
Semax is a synthetic seven-amino-acid peptide whose sequence extends the ACTH(4-10) fragment with a C-terminal proline-glycine-proline tripeptide. The commonly cited sequence is Met-Glu-His-Phe-Pro-Gly-Pro, giving a molecular formula near C37H51N9O10S and a molecular weight close to 813.9 g/mol. It belongs to the broader class of synthetic ACTH fragments studied for central nervous system effects rather than for adrenal steroid stimulation. In practice the material appears as a lyophilized white powder for laboratory work or as a dilute saline solution in clinical settings.
==== Information and Infrastructure Development ==== In 2013, Lad was appointed as Minister of State for Information and Infrastructure Development in the Congress government headed by Chief Minister Siddaramaiah. As minister in charge of Dharwad district, Lad was involved in reviewing district-level development and administrative issues.
March 7, 2016: Law on the rights of foreigners in France; foreign women victims of violence more easily obtain residence permits. March 14, 2016: Law on child protection. April 13, 2016: Law strengthening the fight against the prostitution system and supporting sex workers; creation of an "exit from prostitution" program. August 8, 2016: Law on labor, modernizing social dialogue, and securing career paths; internal regulations must prohibit sexist behavior; legislative creation of the High Council for Professional Equality. October 7, 2016: Law for a digital republic; creation of the offense of sexual privacy violation (including "revenge porn"). November 18, 2016: Law modernizing justice in the 21st century; divorce by mutual consent no longer requires a judge but must involve lawyers and a notary. December 2, 2016: Social Security Financing Law for 2017, establishing the Agency for the Recovery of Unpaid Child Support. January 27, 2017: Law on equality and citizenship, prioritizing women at risk of forced marriage for social housing. February 27, 2017: Law reforming criminal statute of limitations; extension of limitation periods for offenses such as: moral harassment; death, rape or sexual assault threats; domestic violence; sexual assaults other than rape; further extensions for crimes such as rape, mutilating or permanently disabling domestic violence, murder, abduction, and imprisonment. March 20, 2017: Law extending the offense of obstructing abortion to new online practices (e.g., hindering access to information or the procedure itself).
Other measures included shifting the National Council of Traditional Peoples and Communities (CNPCT) from the Ministry of Human Rights and Citizenship to the Ministry of Environment and Climate Change, as well as the establishment of the "National Secretariat for Traditional Peoples and Communities and Sustainable Rural Development" under the same ministry.
The Cave of the High Place in the Small Valley (Cave 181), also called the "Highest Cave", is described extensively by Albert Grünwedel, as a particularly interesting cave of the small ravine. He explains that the cave is located high up on the right side of the ravine, which accounts for the fact that its murals have been preserved from the usual iconoclastic vandalism: the faces in particular are well preserved. Also, the murals did not use gold foils for decoration, which reduced the incentive for theft. In his plates, Grünwedel illustrates the murals of the cave, where he names the cave by its official name: Hochliegende Höhle der 2. Schlucht ("Cave of the High Place in the 2nd Valley"), which is the German name for cave 181. Grünwedel explains that the structure of the cave is extremely rare, as it is not a barrel-vaulted cave: instead, the ceiling has the shape of a tent. The flatness of the sides of the tent-like ceiling is the reason why Grünwedel was able to remove easily most of the ceiling paintings in large panels, something which is impossible with the strongly curved surface of a barrel-vaulted ceiling. The tent-like ceiling is bordered by a row of seven bejewelled princes on each side. The side wall depict rather tumultuous scenes of the sermon of the Buddha, no fewer than eight of them, with a multitude of attendants in various attitudes and clothing. The entrance wall had paintings of Tocharian donors and monks on both side. Above the entrance was the usual painting of Maitreya with surrounding Devaputras.
As a reward for freeing him, the G-Man shows her a vision of her father's death in the future, and offers her the chance to change the outcome. Alyx complies, killing the Advisor and saving her father, and the G-man suspends her in stasis and leaves. Five years later, Freeman regains consciousness at White Forest and is reunited with Eli. Realizing that the G-Man has Alyx, Eli declares his intention to kill him and hands Freeman his crowbar.
Sources: en.wikipedia.org
Phenelzine, also known as 2-phenylethylhydrazine or phenylethylamine hydrazide, is a phenethylamine and hydrazine derivative. It is the hydrazide of β-phenethylamine and can also be referred to as N-aminophenethylamine.
==== Health claims ==== The Japanese Ministry of Health, Labor, and Welfare (MHLW) set up the 'Foods for Specified Health Uses' (特定保健用食品; FOSHU) regulatory system in 1991 to individually approve the statements made on food labels concerning the effects of foods on the human body. The regulatory range of FOSHU was later broadened to allow for the certification of capsules and tablets. In 2001, MHLW enacted a new regulatory system, 'Foods with Health Claims' (保健機能食品; FHC), which consists of the existing FOSHU system and the newly established 'Foods with Nutrient Function Claims' (栄養機能表示食品; FNFC), under which claims were approved for any product containing a specified amount per serving of 12 vitamins, including vitamin B6, and two minerals. To make a health claim based on a food's vitamin B6 content, the amount per serving must be in the range of 0.3–25 mg. The allowed claim is: "Vitamin B6 is a nutrient that helps produce energy from protein and helps maintain healthy skin and mucous membranes." In 2010, the European Food Safety Authority (EFSA) published a review of proposed health claims for vitamin B6, disallowing claims for bone, teeth, hair skin and nails, and allowing claims that the vitamin provided for normal homocysteine metabolism, normal energy-yielding metabolism, normal psychological function, reduced tiredness and fatigue, and provided for normal cysteine synthesis. The US Food and Drug Administration (FDA) has several processes for permitting health claims on food and dietary supplement labels.
The food rations were meagre and there was a two-tier allocation policy, whereby families of men who were still fighting were routinely given smaller rations than others. The inadequate shelter, poor diet, bad hygiene and overcrowding led to malnutrition and endemic contagious diseases such as measles, typhoid, and dysentery, to which the children were particularly vulnerable. Coupled with a shortage of modern medical facilities, many of the internees died. While much of the British press, including The Times, played down the problems in the camps, Emily Hobhouse helped raise public awareness in Britain of the atrocious conditions, as well as being instrumental in bringing relief to the concentration camps.
Similar to plant cells, the cell wall of some microorganisms such as algae and yeast contains indigestible components, such as cellulose. The cells of some kind of SCP should be broken up in order to liberate the cell interior and allow complete digestion. Some kind of SCP exhibits unpleasant color and flavors. Depending on the kind of SCP and the cultivation conditions, care must be taken to prevent and control contamination by other microorganisms because contaminants may produce toxins such as mycotoxins or cyanotoxins. An interesting approach to address this problem was proposed with the fungus Scytalidium acidophilum which grows at a pH as low as 1, outside the tolerance of most microorganisms. This allows it to grow on acid-hydrolysed paper waste at low-cost. Some yeast and fungal proteins are deficient in methionine.
Sources: en.wikipedia.org
=== First Trump administration (2017–2021) === On August 13, 2018, Section 1051 of the Fiscal Year 2019 John S. McCain National Defense Authorization Act (P.L. 115-232) established the National Security Commission on Artificial Intelligence "to consider the methods and means necessary to advance the development of artificial intelligence, machine learning, and associated technologies to comprehensively address the national security and defense needs of the United States." Steering on regulating security-related AI is provided by the National Security Commission on Artificial Intelligence. The Artificial Intelligence Initiative Act (S.1558) is a proposed bill that would establish a federal initiative designed to accelerate research and development on AI for, inter alia, the economic and national security of the United States. On January 7, 2019, following an Executive Order on Maintaining American Leadership in Artificial Intelligence, the White House's Office of Science and Technology Policy released a draft Guidance for Regulation of Artificial Intelligence Applications, which includes ten principles for United States agencies when deciding whether and how to regulate AI. In response, the National Institute of Standards and Technology (NIST) released a position paper, and the Defense Innovation Board issued recommendations on the ethical use of AI. A year later, the administration called for comments on regulation in another draft of its Guidance for Regulation of Artificial Intelligence Applications.
== Undergraduate Research Program == The College of Science and Technology offers the CST Undergraduate Research Program (URP). Students selected to participate work with a faculty sponsor to perform research in the faculty member's lab. Students may be asked to participate in conferences, author papers or to showcase their research work in the department or at the URP Research Symposium.
== History == In March 1963 the Danish pharmaceutical company Lundbeck began research into further agents for schizophrenia, having already developed the thioxanthene derivatives clopenthixol and chlorprothixene. By 1965 the promising agent flupenthixol had been developed and trialled in two hospitals in Vienna by Austrian psychiatrist Heinrich Gross. The long- acting decanoate preparation was synthesised in 1967 and introduced into hospital practice in Sweden in 1968, with a reduction in relapses among patients who were put on the depot.
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.
Dry powder is normally held at -20 °C or lower, away from light and moisture. Sealed vials can also be kept at 2-8 °C for shorter intervals. Warming to room temperature before opening prevents condensation.