This is a working overview of ACTH(4-10), written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2026-03-21 and is reviewed periodically as new material appears.
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.
Purity assessment relies mainly on reversed-phase high-performance liquid chromatography, which separates the target heptapeptide from truncated sequences, deletion analogues, and oxidised forms. Mass spectrometry, usually coupled to liquid chromatography, confirms identity through the expected molecular ion and reveals modifications such as methionine sulfoxide formation. Amino acid analysis can verify composition, and tandem mass spectrometry supports sequence confirmation. Ultraviolet detection near 254 to 280 nanometres is convenient because the phenylalanine and histidine residues absorb in that region. Nuclear magnetic resonance is rarely used for routine release testing.
Common degradation pathways include oxidation of the methionine side chain, hydrolysis of the peptide backbone, and aggregation under unfavourable pH or concentration. Stability studies typically monitor the main peak by chromatography and report total related substances as a percentage. Because no official monograph exists, acceptance criteria vary between laboratories, and reported purity values are not directly comparable across suppliers. Analysts therefore document the method, column, and detection wavelength alongside each result, and open questions remain about how much biological activity the oxidised forms retain.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic heptapeptide (ACTH fragment analog) | Not a steroid; does not belong to the melanocortin agonist drugs by marketing category |
| Molecular formula | C37H51N9O10S (commonly cited) | Reported values vary slightly with salt and counter-ion content |
| Appearance | White to off-white lyophilized powder | A single batch may appear as a loose cake or fluffy solid |
| Solubility | Freely soluble in water and aqueous buffer | Stock solutions are usually prepared in sterile water or saline |
| Typical storage | −20 °C or below, desiccated and protected from light | Seal opened vials promptly to limit moisture uptake |
当时的短肽研究普遍关注能否穿越血脑屏障、在低剂量下产生中枢效应，Semax 属于这一路线。鼻内给药是其主要使用方式，俄语文献报道的适应症涵盖缺血性卒中、短暂性脑缺血发作、认知功能减退以及视神经病变。这些研究大多发表在当地期刊上，样本规模与终点设置同西方试验惯例存在差异，国际同行对其临床证据的强度看法不一。
各国监管态度分化明显。俄罗斯按处方药管理，部分东欧国家留有使用记录；欧盟与美国未批准其作为药物上市，市面流通品通常标注为研究用化学品。身份差异意味着标示含量、纯度与无菌性缺少统一核查。体育领域还牵涉反兴奋剂名录，跨境携带则受目的地药品法规约束。
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.
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.
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 normally supplied as a lyophilized powder, and that form is the most stable. Suppliers commonly recommend storage at -20 °C in a desiccated container protected from light, with short-term handling at room temperature limited to weighing and transfer. Powder that has absorbed moisture degrades faster, so vials should be warmed to ambient temperature before opening to prevent condensation on the contents. Hygroscopic behavior is typical of short hydrophilic peptides, and humidity control matters more than temperature alone for long-term retention.
Once dissolved, the peptide is considerably less stable than the solid. Aqueous solutions are usually prepared at neutral to slightly acidic pH, filtered, and divided into single-use aliquots before freezing. Repeated freeze-thaw cycles are a common cause of avoidable loss and are best prevented by never refreezing a thawed aliquot. Adsorption to plastic and glass surfaces can lower the measured concentration of dilute solutions, particularly below roughly 0.1 mg/mL. Buffer choice, salt content, and container material all influence how much peptide remains detectable after storage.
The company reported that it secures raw material for paper cartons in cooperation with the World Wide Fund for Nature (WWF), the Global Forest and Trade Network (GFTN), and FSC, and that it strives to source polyethylene made from sugarcane from sustainable suppliers in Brazil. In 2010, 40 percent of Tetra Pak's carton supply was FSC-certified. Slowly, sectors where glass bottles have been paramount, like the wine and spirits industry, have begun to look at carton containers as a possible packaging product as the carbon footprint of a carton container is said to be about one-tenth of that of an equivalent glass bottle. Tetra Pak's sustainability work has gained recognition from industry and retailers alike. In 2010, it received the Swedish Forest Industries Climate Award for assuming global responsibility for the forests that provide its raw material. The recently introduced Tetra Recart has also been hailed by large retail groups like Sainsbury's as "the 21st Century alternative to canned foods" as the carton's rectangular shape makes transportation, storage, and distribution more efficient, taking up 21 percent less space and weighing two-thirds of a tin can of equivalent volume.
==== Operation Enduring Freedom – Trans Sahara ==== In June 2005, the United States replaced the PSI with the launch of the Trans-Saharan Counterterrorism Initiative (TSCTI/TSCTP) for Burkina Faso, Mali, Niger, Chad, Mauritania, Morocco, Algeria, Tunisia, Senegal and Nigeria, with the support from the Department of Defense's Operation Enduring Freedom – Trans Sahara (OEF-TS). The principle SOF unit for the TSCTP/TSCTI was the 10th SFG, which was joined by the 20th SFG, as the 3rd SFG (who had regional responsibility for Africa) was assigned to Iraq. This meant the Green Berets in the region lacked the cultural and language prerequisites that the 3rd SFG had, and so the Green Berets were forced into a mission that they, like the targeted countries were "learning on the job". In 2005 and 2007, US Army Special Forces and US Army Rangers, along with contingents from other units participated in the JCET's Flintlock Exercises, where they provided training experience both for American troops and for troops of African countries. Small numbers of European troops were also involved in these exercises. The first test of the TSCTI, which "kicked off" the Saharan counterterrorism initiative was Flintlock 2005, lasted from 6–26 June 2005, and was designated by the Bush administration as the largest American military exercise in Africa since World War II. 700 special forces participants, supported by an additional 2,100 troops from 9 North and West African states.
=== Lung === Chronic obstructive pulmonary disease (COPD) is one of the most widespread health threats today. It affects 329 million people worldwide, which makes up nearly 5% of the global population. Having killed over 3 million people in 2012, COPD was the third greatest cause of death. Worse still, due to increasing smoking rates and the aging populations in many countries, the number of deaths as a result of COPD and other chronic lung diseases is predicted to continue increasing. Therefore, developments in the lung's capacity for regeneration is in high demand. It has been shown that bone marrow-derived cells could be the source of progenitor cells of multiple cell lineages, and a 2004 study suggested that one of these cell types was involved in lung regeneration. Therefore, a potential source of cells for lung regeneration has been found; however, due to advances in inducing stem cells and directing their differentiation, major progress in lung regeneration has consistently featured the use of patient-derived iPSCs and bioscaffolds. The extracellular matrix is the key to generating entire organs in vitro. It was found that by carefully removing the cells of an entire lung, a "footprint" is left behind that can guide cellular adhesion and differentiation if a population of lung epithelial cells and chondrocytes are added. This has serious applications in regenerative medicine, particularly as a 2012 study successfully purified a population of lung progenitor cells that were derived from embryonic stem cells.
Brenner has developed targeted, quantitative analysis of the NAD+ metabolome and made fundamental contributions to NAD metabolism including discovery of nicotinic acid riboside-dependent NAD synthesis, elucidating the mechanism of synthesis of nicotinic acid adenine dinucleotide phosphate, and discovering multiple conditions in which NAD metabolism is dysregulated in disease. Brenner is active in translating NR technologies to treat and prevent human conditions that disturb the NAD system including cancer diabetic and chemotherapeutic peripheral neuropathy, heart failure, central brain injury, inflammation, mitochondrial myopathy pellagra, and infections such as coronavirus infection Brenner's work included the first human trial of NR in 2016, which demonstrated safe oral availability as an NAD+ precursor, thereby creating the foundational intellectual property for the NAD boosting industry. Though Brenner was the first to show that NR increases SIR2 activity, improves gene silencing, and can extend yeast lifespan, his work has not emphasized sirtuins or nonspecific anti-aging claims and instead emphasizes how NR repairs inflammatory conditions and metabolic stresses that dysregulate NAD+ and NADPH.
The proclamation of the March Constitution was followed by a short and turbulent period of constitutional order and parliamentary democracy that lasted until 1926. The legislature remained fragmented, without stable majorities, and governments changed frequently. The open-minded Gabriel Narutowicz was elected president according to the Constitution by the National Assembly in 1922, without popular vote. However, members of the nationalist right-wing faction did not regard his elevation as legitimate. They viewed Narutowicz rather as a traitor whose election was pushed through by the votes of alien minorities. Narutowicz and his supporters were subjected to an intense harassment campaign, and the president was assassinated on 16 December 1922, after serving only five days in office. Land reform measures were passed in 1919 and 1925 under pressure from an impoverished peasantry. They were partially implemented, but resulted in the parcellation of only 20% of the great agricultural estates. Poland endured numerous economic calamities and disruptions in the early 1920s, including waves of workers' strikes such as the 1923 Kraków riot. The German–Polish customs war, initiated by Germany in 1925, was one of the most damaging external factors that put a strain on Poland's economy. On the other hand, there were also signs of progress and stabilization, for example a critical reform of finances carried out by the competent government of Władysław Grabski, which lasted almost two years.
Sources: en.wikipedia.org
It was protected through NAFTA in Canada and the United States until July 2020 and through bilateral agreements with individual countries such as Japan and Israel, and it has been a protected designation of origin product in the European Union since 1997. Tequila is commonly served neat in Mexico and as a shot with salt and lime around the world.
=== Late onset form === The Late-onset (LOPD) form differs from the infantile-onset principally in the relative lack of cardiac involvement. The onset has a slower progression and can present at any decade of life. Cardiac involvement may occur but is milder than in the infantile form. Skeletal involvement is more prominent with a predilection for the lower limbs. Late-onset features include impaired cough, recurrent chest infections, hypotonia, progressive muscle weakness, delayed motor milestones, difficulty swallowing or chewing, and reduced vital capacity. Variability in the age of onset, severity, and symptoms, between those as genetically similar as identical twins, indicates that there may be epigenetic - or secondary factors - influencing disease presentation. Prognosis depends on the age of onset of symptoms with a better prognosis being associated with later onset disease.
==== Reception ==== Critical reception to the black oil has been largely positive. Den of Geek named the black oil and the killer bees among "The Top 10 X-Files Baddies". The review applauded the black oil's creepy nature and noted that the black oil was "central part of the larger Colonisation Plan that underpins the big story arc of the series". They awarded it a "Coolness" rating of four out of five, an "Impact" rating of three out of five, and a "Creepiness" rating of four out of five. Furthermore, Den of Geek wrote positively of the Killer Bees and wrote that "you gotta love" them. The review stated that they were "in the pantheon of 'cool shit to do in movies'" and that their presence added to the overall effect of the first movie. The site awarded the bees a "Coolness" rating of five out of five, an "Impact" rating of two out of five, and a "Creepiness" rating of two out of five.
=== Boiling points and solubility === Thiols show little association by hydrogen bonding, both with water molecules and among themselves. Hence, they have lower boiling points and are less soluble in water and other polar solvents than alcohols of similar molecular weight. For this reason also, thiols and their corresponding sulfide functional group isomers have similar solubility characteristics and boiling points, whereas the same is not true of alcohols and their corresponding isomeric ethers.
Sources: en.wikipedia.org
== Third party payment == Most insurers refuse to cover the treatment. In some hearings and cases where a judge has heard evidence, insurance companies have been ordered to pay for that patient. For example, a trial with CalPERS resulted in a decision ordering Blue Cross and other insurance providers to pay for the therapy as to those parties. However, a subsequent assessment by CMS found no evidence that Pulsatile Insulin improves the condition of type 1 and 2 diabetics and has issued a National non-coverage decision which to date is still in effect. CMS has issued a specific code to use when billing this treatment to avoid erroneous payment by billing by the individual procedures that are used in the treatment. Until acceptable clinical trials are performed to show the benefit of pulsatile insulin or Artificial Pancreas Treatment as it is being currently marketed as, the Medicare NCD will continue to remain in effect.
== Enzymatic browning == Polyphenol oxidase is an enzyme found throughout the plant and animal kingdoms, including most fruits and vegetables. PPO has importance to the food industry because it catalyzes enzymatic browning when tissue is damaged from bruising, compression or indentations, making the produce less marketable and causing economic loss. Enzymatic browning due to PPO can also lead to loss of nutritional content in fruits and vegetables, further lowering their value. Because the substrates of these PPO reactions are located in the vacuoles of plant cells damaged mainly by improper harvesting, PPO initiates the chain of browning reactions. Exposure to oxygen when sliced or pureed also leads to enzymatic browning by PPO in fruits and vegetables. Examples in which the browning reaction catalyzed by PPO may be desirable include avocados, prunes, sultana grapes, black tea, and green coffee beans.
Glycomics is the comprehensive study of glycomes (the entire complement of sugars, whether free or present in more complex molecules of an organism), including genetic, physiologic, pathologic, and other aspects. Glycomics "is the systematic study of all glycan structures of a given cell type or organism" and is a subset of glycobiology. The term glycomics is derived from the chemical prefix for sweetness or a sugar, "glyco-", and was formed to follow the omics naming convention established by genomics (which deals with genes) and proteomics (which deals with proteins).
Sources: en.wikipedia.org
It is a short synthetic peptide built from seven amino acids: methionine, glutamic acid, histidine, phenylalanine and three prolines. The sequence derives from the 4-10 fragment of adrenocorticotropic hormone with an added proline-glycine-proline tail. No plant or animal extract is involved; the material is produced by solid-phase peptide synthesis.
It was developed in the Soviet Union during the early 1980s by groups at the Institute of Molecular Genetics in Moscow. Russian approval for intranasal use followed, and it has been marketed there since. Western laboratories encountered it mainly through translated literature and, later, through online research-chemical trade.
It holds a Russian registration as a prescription nasal product but has no approval from the European Medicines Agency or the United States Food and Drug Administration. Buyers outside Russia usually receive material sold strictly for laboratory research. That distinction matters because research-grade and pharmaceutical-grade products carry different documentation and testing expectations.
Dry powder is usually kept at about -20 degrees Celsius for long-term storage and at 2 to 8 degrees Celsius for short working periods. Containers should stay sealed and protected from light and moisture to limit degradation.