ACTH(4-10) comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Updated 2026-05-29. Numbers and descriptions here follow the published literature rather than marketing material.
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.
Practical handling follows from those properties. Bulk material is best divided into single-use portions soon after receipt, because each thaw exposes the whole container to moisture and temperature cycling. Vials should be allowed to reach room temperature before opening to prevent condensation on the powder. Low-binding plasticware reduces loss of dilute solutions, and sterile filtration is used when a preparation must remain free of microbial growth. Records of batch number, reconstitution date and storage history are what allow a later analytical result to be interpreted meaningfully.
Identity and purity of Semax are established mainly by reversed-phase high-performance liquid chromatography coupled with mass spectrometry. The chromatographic trace gives a purity estimate as a percentage of total peak area, while electrospray or matrix-assisted laser desorption ionization confirms the molecular mass against the calculated value. Amino acid analysis and sequence-specific fragmentation provide further confirmation when a supplier's chain of custody is unclear. Vendors frequently quote a purity figure without stating the detection wavelength or the integration method, which limits how far one number can be compared with another.
| 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 |
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.
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.
Routine characterization relies on reversed-phase high-performance liquid chromatography to establish purity and on mass spectrometry to confirm molecular identity. Electrospray ionization and matrix-assisted laser desorption ionization are both used for mass verification. Amino acid analysis and peptide mapping can detect sequence errors. Common impurities include truncated sequences, methionine sulfoxide formed by oxidation, and deamidated products. Chromatograms are usually recorded near 214 nm, where the peptide backbone absorbs, and purity is reported as the percentage area of the principal peak.
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.
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.
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== History == The organization was formed in 1956 when the Council of American Bioanalysts (CAB) merged with the National Association of Clinical Laboratories (NACL) The AAB serves as an umbrella organization for the American Board of Bioanalysis, AAB Board of Registry AAB Associate Member Section, College of Reproductive Biology Environmental Biology and Public Health Section and National Independent Laboratory Association. In 1999, the International Society for Clinical Laboratory Technologists (ISCLT) merged with the American Association of Bioanalysts. Founded in 1962, the credentialing commission of the ISCLT certified medical technologists under Registered Medical Technologist RMT (ISCLT).
Glucagon-like peptide-1 (GLP-1) is a 30- or 31-amino-acid-long peptide hormone deriving from tissue-specific posttranslational processing of the proglucagon peptide. It is produced and secreted by intestinal enteroendocrine L-cells and certain neurons within the nucleus of the solitary tract in the brainstem upon food consumption. The initial product GLP-1 (1–37) is susceptible to amidation and proteolytic cleavage, which gives rise to the two truncated and equipotent biologically active forms, GLP-1 (7–36) amide and GLP-1 (7–37). Active GLP-1 protein secondary structure includes two α-helices from amino acid position 13–20 and 24–35 separated by a linker region. Alongside glucose-dependent insulinotropic peptide (GIP), GLP-1 is an incretin; thus, it has the ability to decrease blood sugar levels in a glucose-dependent manner by enhancing the secretion of insulin. Beside the insulinotropic effects, GLP-1 has been associated with numerous regulatory and protective effects. Unlike GIP, the action of GLP-1 is preserved in patients with type 2 diabetes. Glucagon-like peptide-1 receptor agonists gained approval as drugs to treat diabetes and obesity starting in the 2000s. Endogenous GLP-1 is rapidly degraded primarily by dipeptidyl peptidase-4 (DPP-4), as well as neutral endopeptidase 24.11 (NEP 24.11) and renal clearance, resulting in a half-life of approximately 2 minutes. Consequently, only 10–15% of GLP-1 reaches circulation intact, leading to fasting plasma levels of only 0–15 pmol/L.
Food and Drug Administration (FDA) has issued a black box warning for suicidal behavior/ideation. Similar warnings have been issued in Australia. Unlike stimulant medications, atomoxetine does not have misuse liability or the potential to cause withdrawal effects upon abrupt discontinuation. Atomoxetine has been found to directly inhibit hERG potassium currents with an IC50Tooltip half-maximal inhibitory concentration of 6,300 nM, which has the potential to cause arrhythmia. No substantial QTc interval changes were observed in a clinical study of atomoxetine in CYP2D6 poor metabolizers. However, small changes could not be ruled out, and there was a slight but significant increase in QTc interval with higher atomoxetine concentrations. QT prolongation has been reported with atomoxetine at therapeutic doses and in overdose; it is suggested that atomoxetine not be used with other medications that may prolong the QT interval, concomitantly with CYP2D6 inhibitors, and caution to be used in poor metabolizers. Unlike α2-adrenergic receptor agonists such as guanfacine and clonidine, atomoxetine's use can be abruptly stopped without significant withdrawal symptoms being observed.
the attempt to put into practice the radical theories of völkisch antisemitism from 1933 onward together with the policy following the beginning of the Second World War of forcibly moving around millions of people. the Nazi policies of dividing the population into those of genetic "value" and "non-value" in terms of education, social policy, health policy and demographics with the theme of "selecting" those with "value" over those of "non-value". the policies of "racial hygiene" of sterilizing the "genetically unhealthy" which was followed up by the Action T4 program launched in January 1939 of killing all mentally and physically disabled Germans, which provided the prototype for the extermination of the Jews. The Action T4 program of killing the disabled marked the first time that an entire group had been selected for extermination based solely for their perceived genetic flaws. starting with the conquest of Poland, the "forced employment of millions of foreign workers meant that the völkisch hierarchy of Herrenmensch and Untermensch became a structural feature of daily life" which provided a context for genocide as it desensitized much of the German public to the sufferings of others. the "escalation of terror" following the conquest of Poland in September 1939 and then by the "war of extermination" launched against the Soviet Union with Operation Barbarossa in June 1941 with Hitler giving the Commissar Order, unleashing the Einsatzgruppen to exterminate Soviet Jews, and the orders to allow millions of Soviet POWs to stave to death.
Sources: en.wikipedia.org
In October 2016, the Monetary Authority of Singapore admonished and fined UBS and DBS and withdrew the banking licence from Falcon Private Bank for their alleged role in the Malaysian Sovereign Fund scandal. In 2016, Singapore was rated the world's most expensive city for the third consecutive year by the Economist Intelligence Unit, and this remained true in 2018. The government provides numerous assistance programmes to the homeless and needy through the Ministry of Social and Family Development, so acute poverty is rare. Some of the programmes include providing financial assistance to needy households, providing free medical care at government hospitals, and paying for children's tuition. Other benefits include compensation for gym fees to encourage citizens to exercise, up to S$166,000 as a baby bonus for each citizen, heavily subsidised healthcare, financial aid for the disabled, the provision of reduced-cost laptops for poor students, rebates for costs such as public transport and utility bills, and more. In the 2025 report, Singapore was ranked 13th in the world in the Human Development Index (HDI) with a value of 0.946, making it one of four regions in Asia to be ranked within the top 20, with the other three being Hong Kong, United Arab Emirates, and South Korea.
Nail clubbing, also known as digital clubbing or clubbing, is a deformity of the finger or toe nails associated with several diseases, anomalies and defects, some congenital, mostly of the heart and lungs. When it occurs together with joint effusions, joint pains, and abnormal skin and bone growth it is known as hypertrophic osteoarthropathy. Clubbing is associated with lung cancer, lung infections, interstitial lung disease, cystic fibrosis, or cardiovascular disease. Clubbing may also run in families, and occur unassociated with other medical problems. Clubbing has been recognized as a sign of disease since the time of Hippocrates. It is seen in 1% of internal medicine admissions and is associated with serious underlying disease in 40% of these admissions.
Extension of the synephrine N-methyl substituent by one methylene unit to an N-ethyl gives the hypotensive experimental drug "Sterling #573"/"Aethyl-Sympatol". The above structural relationships all involve a change at one position in the synephrine molecule, and numerous other similar changes, many of which have been explored, are possible. However, the structure of ephedrine differs from that of synephrine at two different positions: ephedrine has no substituent on the phenyl ring where synephrine has a 4-OH group, and ephedrine has a methyl group on the position α- to the N in the side-chain, where syneprine has only a H atom. Furthermore, "synephrine" exists as either of two enantiomers, while "ephedrine" exists as one of four different enantiomers; there are, in addition, racemic mixtures of these enantiomers. The main differences of the synephrine isomers compared for example to the ephedrines are the hydroxy-substitutions on the benzene ring. Synephrines are direct sympathomimetic drugs while the ephedrines are both direct and indirect sympathomimetics. One of the main reasons for these differential effects is the obviously increased polarity of the hydroxy-substituted phenyl ethyl amines which renders them less able to penetrate the blood-brain barrier as illustrated in the examples for tyramine and the amphetamine analogs.
La Union was a secret society that became dedicated to the Annexationist Movement, thinking that it would be better for Cuba to become a fully integrated state of the United States, rather than to remain a Spanish possession.
Sources: en.wikipedia.org
Although scientists and researchers had warned of a global pandemic for years, world governments were still largely unprepared for the emergence of the Covid-19 disease as it spread in a matter of weeks in early 2020. Scientists estimate that there was a 70% chance that Covid-19 would have gone extinct on its own, before reaching what's called a endemic virus (reaching the point of being embedded in the host population). As the nature of the virus became clear, countries were forced to shut down travel, businesses, and the way of life for most of the world, to a degree unprecedented in modern history. Lost global economic output measures up to $22 trillion during this time (most of 2020 through 2022). Governments and health agencies were forced to develop response plans in record time. Efforts in the United States like Operation Warp Speed sought to develop a vaccine, which was successfully released in late 2020. In the end, the pandemic became the fifth-deadliest pandemic in history and still threatens health outcomes of individuals through long covid.
== Alternative for specimen transport == One common alternative to dry shippers is using dry ice. This method reduces package weight and costs since there's no need for return shipping, unlike with dry shippers. However, at -80 °C (176 °F), dry ice might not provide a temperature low enough for all specimens. For instance, while cryopreserved mouse spermatozoa can handle this temperature for short periods without losing their fertilization capacity, cryopreserved mouse embryos require colder environments, such as those below -150 °C (302 °F) in dry shippers, to maintain their quality. Another method is shipping freeze-dried samples at ambient temperatures, as seen with freeze-dried mouse spermatozoa. This can be more cost-effective, but many samples, when freeze-dried, experience a notable decline in quality, limiting its applicability.
== June 11, 1915 (Friday) == Second Battle of Artois — Despite the Germans inflicting major casualties, French advanced 500 metres (550 yd) on a 300-metre (330 yd) front towards Neuville-Saint-Vaast, France. Battle of Hébuterne — The German launched the first of two counterattacks, with the first failing to dislodge the French. Second Battle of Garua — British and French forces formally took control of all garrisons around Garua, German Cameroon. Friar Leonard Melki and hundreds of other Christians are driven out of Mardin and massacred by Ottoman troops. Born: Magda Gabor, Hungarian actress, eldest sister of the Gabor sisters which included Eva and Zsa Zsa; as Magdolna Gábor, in Budapest, Austria-Hungary (present-day Hungary) (d. 1997)
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.
Suppliers normally quote a percentage of total chromatographic peak area, most often from reversed-phase HPLC. That figure says nothing about what the remaining percentage contains, and it depends on the detection wavelength used. A mass spectrometry result is a separate and stronger check on identity.