Everything below concerns neuropeptide. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-04-23. Where a claim depends on a specific study, the study is described rather than over-claimed.
The C-terminal Pro-Gly-Pro extension is not incidental. Proline-rich tails are known to resist several common peptidases, and the published literature attributes the longer half-life of Semax, relative to unmodified ACTH fragments, to this feature. The modification also removes the melanocyte-stimulating and corticosteroidogenic activity that characterizes longer ACTH-derived sequences. Because the molecule is small and hydrophilic, it is typically formulated as an aqueous solution for intranasal or parenteral delivery. Acetylation or amidation at the termini appears in closely related research peptides and shifts the mass by a fixed increment.
Reported pharmacological work centers on neurotrophic signaling, including changes in BDNF and NGF expression in hippocampal tissue in animal models. Human data come largely from studies conducted in Russia, and how well those results generalize to other populations remains an open question. Regulatory status differs sharply by jurisdiction: Semax is a registered prescription medicine in Russia, while it holds no approved marketing status in the United States or the European Union. Outside such jurisdictions it is generally handled as a research chemical, which affects both documentation and quality expectations.
Semax is a synthetic heptapeptide whose sequence is Met-Glu-His-Phe-Pro-Gly-Pro. It was developed as a fragment analog of adrenocorticotropic hormone, modeled specifically on the ACTH(4-10) region. The first four residues reproduce that fragment, while a Pro-Gly-Pro tripeptide is appended at the C-terminus. Work on the compound originated in Russia, where it entered clinical use as an intranasal preparation. Its sequence places it among short regulatory peptides studied for effects on the central nervous system rather than on the adrenal axis.
常规纯度与身份确认依赖反相高效液相色谱，并辅以质谱测定分子量。氨基酸组成分析可用于验证序列构成，肽图分析则能进一步定位修饰或降解产物。杂质谱通常关注缺失序列肽、截短片段和氧化产物。不同方法的检出限并不相同，因此各实验室报告的纯度数值不宜直接横向比较。
多数实验室与市售的 Semax 以冻干粉形式提供。冻干粉通常建议保存在 -20 °C 或更低温度下，同时避免光照与反复升温。短期运输有时采用冷藏条件，但长期保存仍以冷冻为主。分包操作应尽量减少开盖次数，以降低吸湿和微生物污染的风险。开封后若未一次用完，建议在干燥环境中密封并尽快放回低温储存。
溶液状态的稳定性明显低于冻干粉。肽类在水溶液中可能经历水解、氧化与聚集，其中甲硫氨酸和天冬酰胺等残基常是敏感位点。Semax 含有甲硫氨酸，因此氧化风险相对突出。工作液一般主张现配现用，或冷藏并在数日内用尽。缓冲液种类、pH 和离子强度都会影响降解速率，而关于最佳条件的公开数据并不统一。
| Property | Value | Notes |
|---|---|---|
| Molecular weight | ~813.9 Da (free heptapeptide) | N-acetylated form is about 42 Da heavier |
| Residue count | 7 (heptapeptide) | Four residues from ACTH(4-10), three added |
| Appearance | White to off-white powder | Usually supplied lyophilized |
| Solubility class | Freely soluble in water | Also dissolves in DMSO and polar organic solvents |
| Related parent fragment | ACTH(4-10) | Parent motif is Met-Glu-His-Phe |
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.
Semax is supplied as a lyophilized powder that appears white to off-white. It dissolves readily in water, phosphate-buffered saline, and other aqueous media, which simplifies preparation of working solutions for laboratory use. The nasal products registered in Russia are dilute aqueous solutions, typically around 0.1 percent peptide by weight. Organic solvents are rarely necessary and can complicate handling. Because the peptide is hygroscopic, weighing should be performed quickly and with minimal exposure to ambient humidity.
Solid material is normally kept at minus 20 degrees Celsius in a sealed, desiccated container. Reconstituted solutions are less stable and are usually divided into single-use aliquots before freezing. Repeated freeze-thaw cycles are avoided because they promote aggregation and loss of activity. Light exposure is minimized by using amber glassware or foil wrapping. Published stability data for this peptide are sparse, so recommended storage conditions rest mainly on general practice for short synthetic peptides rather than on dedicated study.
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.
Alongside promotions of general law enforcement and upgrades to courts, the package also provided funding for strengthening the PET's activities in the North Atlantic, and provided new maritime equipment to Greenlandic and Faroese police in response to the crisis. By 19 January 2026, a total of over kr. 88 billion (US$13.7 billion) had been committed to "strengthen defense and security in the Arctic", with kr. 29 billion allocated to acquiring F-35 fighter jets alone, and kr. 27.8 billion for anti-aircraft warfare, according to the Ministry of Defence, and at that point Denmark had sent 200 additional soldiers to Greenland. On the same day, more soldiers together with the Chief of the Royal Danish Army, General Peter Harling Boysen, started arriving in Greenland, and Denmark announced that a "substantial contribution" of its armed forces would be sent there. Also on 19 January, Defence Minister Troels Lund Poulsen and Greenlandic Minister of Foreign Affairs Vivian Motzfeldt met NATO secretary general Rutte and their Nordic Security ministers in Brussels about the situation in Greenland. General Boysen said he is ready to defend Greenland. According to Boysen, the soldiers landed in Kangerlussuaq in western Greenland. On 20 January 2026, Denmark deployed additional troops to Greenland, sending dozens of soldiers and senior military leadership to the Arctic territory to reinforce its presence and participate in ongoing multinational exercises, increasing the Danish Armed Forces' personnel stationed there amid heightened international tensions.
== After 1945 == After the Second World War, the BRSD was re-founded. The group in the Soviet occupation zone disintegrated after 1946. The organization in West Germany was marginialized because of the Cold War, but was able to revitalize itself after 1968. Today, the BRSD is a member of the Attac network, of Oikocredit, Kairos Europa, and the International League of Religious Socialists.
Like CMX-1152, the herbal mixture known as Protandim that supplanted it was marketed by Lifeline as an "anti-aging" supplement that increases the body's antioxidant defenses by upregulating superoxide dismutase, catalase, and glutathione peroxidase. According to the company, the product was initially sold through retail channels such as GNC; however, in 2009, after several consecutive years of multimillion-dollar losses, the company, which by then was doing business under the name LifeVantage, stopped marketing it through retailers and switched to multi-level marketing, selling it instead through a network of commissioned independent distributors. According to LifeVantage, the move from retail to multi-level marketing was prompted by the January 2008 hiring of David W. Brown, (formerly CEO and president of Metabolife) as the company's CEO and president. Beginning in 2005, Protandim was produced under a manufacturing agreement with The Chemins Company of Colorado Springs, Colorado. In July 2008, LifeVantage entered into a new manufacturing agreement with Cornerstone Research & Development to produce Protandim, and with Wasatch Product Development to produce a Protandim-based skin cream (TrueScience). In 2006, biochemist Joe M. McCord joined the LifeVantage board of directors as the company's director of science. McCord, who is listed by the U.S. Securities and Exchange Commission as a LifeVantage insider shareholder, served as a spokesperson for Protandim and was responsible for distributor training and product research.
Spironolactone is closely related structurally to other clinically used spirolactones such as canrenone, potassium canrenoate, drospirenone, and eplerenone, as well as to the never-marketed spirolactones SC-5233 (6,7-dihydrocanrenone; 7α-desthioacetylspironolactone), SC-8109 (19-nor-6,7-dihydrocanrenone), spiroxasone, prorenone (SC-23133), mexrenone (SC-25152, ZK-32055), dicirenone (SC-26304), spirorenone (ZK-35973), and mespirenone (ZK-94679).
In conjunction, the Russian Interior Ministry issued an arrest warrant for the International Criminal Court's Prosecutor Karim Ahmad Khan, who was responsible for issuing Putin's arrest warrant in March 2023, while the Prosecutor-General of Russia deemed the environmental organization Greenpeace an "undesirable organization", calling it "a threat to the foundations of the constitutional order and security" of the country for interfering in the "internal affairs of the state" and spreading "anti-Russian propaganda" and calling for economic sanctions. The order prompted Greenpeace to halt its operations in Russia. Yevgeny Roizman, former mayor of Yekaterinburg and opposition politician, was convicted and fined 260,000 rubles ($3245) for discrediting the Russian army over comments made regarding the war in Ukraine. Ukraine was losing some 10,000 drones a month due to Russian electronic warfare according to report by the Royal United Services Institute.
Sources: en.wikipedia.org
Translational research (also called translation research, translational science, or, when the context is clear, simply translation) is the conversion of basic research into results that directly benefit human life. The term is used in science and technology, especially in biology and medical science. As such, translational research forms a subset of applied research. The term has been used most commonly in life sciences and biotechnology, but applies across the spectrum of science and humanities. In the context of biomedicine, translational research is also known as bench to bedside. In the field of education, it is defined as research which translates concepts to classroom practice. Critics of translational medical research (to the exclusion of more basic research) point to examples of important drugs that arose from fortuitous discoveries in the course of basic research such as penicillin and benzodiazepines. Other problems have stemmed from the widespread irreproducibility thought to exist in translational research literature. Although translational research is relatively new, there are now several major research centers focused on it. In the U.S., the National Institutes of Health has implemented a major national initiative to leverage existing academic health center infrastructure through the Clinical and Translational Science Awards. Furthermore, some universities acknowledge translational research as its own field in which to study for a PhD or graduate certificate.
== Research == Diphenoxylate and atropine have been studied in small trials as a treatment for fecal incontinence; it appears to be less efficacious and have more adverse effects when compared with loperamide or codeine.
=== Removal rate === A drug's removal rate will be determined by the proportion of the drug that is removed from circulation by each organ once the drug has been delivered to the organ by the circulating blood supply. This new concept builds on earlier ideas and it depends on a number of distinct factors:
== Diagnosis == The initial clinical evaluation of a suspected TIA involves obtaining a history and physical exam (including a neurological exam). History taking includes defining the symptoms and looking for mimicking symptoms as described above. Bystanders can be very helpful in describing the symptoms and giving details about when they started and how long they lasted. The time course (onset, duration, and resolution), precipitating events, and risk factors are particularly important. The definition, and therefore the diagnosis, has changed over time. TIA was classically based on duration of neurological symptoms. The current widely accepted definition is called "tissue-based" because it is based on imaging, not time. The American Heart Association and the American Stroke Association (AHA/ASA) now define TIA as a brief episode of neurological dysfunction with a vascular cause, with clinical symptoms typically lasting less than one hour, and without evidence of significant infarction on imaging.
Sources: en.wikipedia.org
8 August 2024 United Kingdom riots: A further 21 people receive prison sentences for their roles in the riots. The Independent Office for Police Conduct confirms that a second officer is under investigation over an incident at Manchester Airport where a man was kicked. Katie Price is arrested at Heathrow Airport for failing to attend court and is taken into police custody. 9 August Huw Edwards is asked by the BBC to pay back more than £200,000 that he received from the corporation after being arrested on child abuse image charges. Figures show the number of overseas workers and students and their families applying for visas has fallen by a third in the past 12 months following rule changes that prevented many workers from bringing their families with them. 11 August 2024 Summer Olympics: Team GB have secured 65 medals at the 2024 Olympic Games, equalling the number of medals won in 2012. With the following day expected to be the hottest of the year as a result of a "heat spike", the Met Office issues two yellow weather warnings for thunderstorms for Northern Ireland, northern England and Scotland. Figures show that 703 migrants crossed the English Channel in small boats, the highest daily number since Keir Starmer became the prime minister. 12 August The hottest day of the year so far is confirmed by the Met Office, with a high of 34.8 °C recorded in Cambridge. Five-time Olympic medallist Tom Daley announces his retirement from diving at the age of 30.
Except for placozoans, multicellular animals including humans have a variety of organ systems. These specific systems are widely studied in human anatomy. The functions of these organ systems often share significant overlap. For instance, the nervous and endocrine system both operate via a shared organ, the hypothalamus. For this reason, the two systems are combined and studied as the neuroendocrine system. The same is true for the musculoskeletal system because of the relationship between the muscular and skeletal systems.
=== Personalized cancer treatment === Personalized cancer treatment is a tuned method based on the patient's diagnosis and background. Microfluidic technology offers sensitive detection with higher throughput, as well as reduced time and costs. For personalized cancer treatment, tumor composition and drug sensitivities are very important. A patient's drug response can be predicted based on the status of biomarkers, or the severity and progression of the disease can be predicted based on the atypical presence of specific cells. Drop-qPCR is a droplet microfluidic technology in which droplets are transported in a reusable capillary and alternately flow through two areas maintained at different constant temperatures and fluorescence detection. It can be efficient with a low contamination risk to detect Her2. A digital droplet‐based PCR method can be used to detect the KRAS mutations with TaqMan probes, to enhance detection of the mutative gene ratio. In addition, accurate prediction of postoperative disease progression in breast or prostate cancer patients is essential for determining post-surgery treatment. A simple microfluidic chamber, coated with a carefully formulated extracellular matrix mixture is used for cells obtained from tumor biopsy after 72 hours of growth and a thorough evaluation of cells by imaging. Microfluidics is also suitable for circulating tumor cells (CTCs) and non-CTCs liquid biopsy analysis. Beads conjugate to anti‐epithelial cell adhesion molecule (EpCAM) antibodies for positive selection in the CTCs isolation chip (iCHIP).
Xi supports stronger Party leadership, saying "government, the military, society and schools, north, south, east and west – the party leads them all." During the 100th anniversary of the CCP in 2021, he said that "without the Communist Party of China, there would be no new China and no national rejuvenation," and that "the leadership of the Party is the defining feature of socialism with Chinese characteristics and constitutes the greatest strength of this system." Xi has said that China, despite many setbacks, has achieved great progress under the CCP, saying that "socialism with Chinese characteristics has become the standard-bearer of 21st-century socialist development." However, he also warned that it will take a long time for China under the CCP to complete its rejuvenation, and during this timeframe, party members must be vigilant to not let CCP rule collapse. For the CCP to maintain "purity" and "eternal youth" and not led Party rule to collapse, Xi has called on cadres to engage in self-revolution, through which the CCP roots out corruption and ineffectual officials. Xi has said that "our party is so large, and our country, so huge–it is such that if the Party Central lacks the sole authority to make decisions, nothing can be achieved", comparing the Party Central to the CCP's "cerebrum" and the "central nervous system", and said it "should have the sole authority in making decisions". Xi has spoken out against "historical nihilism", meaning historical viewpoints that challenge the official line of the CCP.
NeoGenomics Laboratories, Inc., also known as NeoGenomics or Neo, is an American CLIA-certified clinical laboratory, pharma services and information services company that specializes in cancer genetics diagnostic testing. The company's testing services include cytogenetics, fluorescence in situ hybridization (FISH), flow cytometry, immunohistochemistry, anatomic pathology, and molecular genetics. Headquartered in Fort Myers, FL, NeoGenomics maintains a network of testing facilities across the US, with laboratories in Florida, California, Tennessee, and Texas.
Sources: en.wikipedia.org
The sequence is Met-Glu-His-Phe-Pro-Gly-Pro, a seven-residue peptide. The first four residues correspond to the ACTH(4-10) fragment, and Pro-Gly-Pro is added at the C-terminus. N-acetylated versions also appear in the literature and differ in mass.
Semax is a synthetic analog of the ACTH(4-10) fragment rather than a copy of the full hormone. Truncation plus the added tail removes the steroidogenic portion of ACTH. That distinction explains why it is studied for nervous-system effects instead of adrenal stimulation.
It is registered as a prescription product in Russia and has been used there clinically, chiefly by the intranasal route. No approval exists in the United States or the European Union. Availability elsewhere typically falls under research-chemical distribution, with varying purity documentation.
一般不建议常温长期保存。多数说明指向 -20 °C 冷冻避光。常温运输通常被视为短期可接受，但会加快降解风险。