合成七肽 is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Last reviewed on 2026-07-22. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
Solid semax is typically supplied as a lyophilised powder that is hygroscopic and sensitive to moisture, light, and repeated temperature cycling. Long-term storage of the dry peptide is generally recommended at approximately -20 degrees Celsius, while shorter working periods may use refrigeration at 2 to 8 degrees Celsius. Vials should remain tightly closed and desiccated when brought to room temperature, because condensation can damage the material before it is weighed. Dividing a batch into aliquots is preferable to thawing one container repeatedly.
| 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.
==== Digestion ==== CCK mediates digestion in the small intestine by inhibiting gastric emptying. It stimulates the acinar cells of the pancreas to release a juice rich in pancreatic digestive enzymes (hence an alternate name, pancreozymin) that catalyze the digestion of fat, protein, and carbohydrates. Thus, as the levels of the substances that stimulated the release of CCK drop, the concentration of the hormone drops as well. The release of CCK is also inhibited by somatostatin and pancreatic peptide. Trypsin, a protease released by pancreatic acinar cells, hydrolyzes CCK-releasing peptide and monitor peptide, in effect turning off the additional signals to secrete CCK.
== See also == Abigail Alliance for Better Access to Developmental Drugs Animal drug Biologics license application Drug discovery FDA Fast Track Development Program Good Manufacturing Practice Inverse benefit law Lists of investigational drugs Orphan drug TOL101
Postmenopausal osteoporosis Hypercalcaemia Bone metastases Paget's disease Phantom limb pain It has been investigated as a possible non-operative treatment for spinal stenosis. The following information is from the UK Electronic Medicines Compendium
== Side effects and risks == Risks of an improperly performed dermal filler procedure commonly include bruising, redness, pain, or itching. Less commonly, there may be infections or allergic reactions, which may cause scarring and lumps that may require surgical correction. In 2024, a cluster of HIV infections was described amongst clients receiving microneedling facials at a spa. More rarely, serious adverse effects such as blindness due to retrograde (opposite the direction of normal blood flow) embolization into the ophthalmic and retinal arteries can occur. Delayed skin necrosis can also occur as a complication of embolization. Embolic complications are more frequently seen when autologous fat is used as a filler, followed by hyaluronic acid. Though rare, when vision loss does occur, it is usually permanent.
==== United States ==== Gabapentin is not a controlled substance under the federal Controlled Substances Act. Effective in July 2017, Kentucky classified gabapentin as a Schedule V controlled substance statewide. Gabapentin is a schedule V drug in other states such as West Virginia, Tennessee, Alabama, Utah, and Virginia.
Sources: en.wikipedia.org
Cuts the Medicaid provider tax, which helps states fund their Medicaid costs, from 6% to 3.5% by 2031; Adds work requirements for Medicaid recipients for the first time, with individuals ages 19 to 64 required to work at least 80 hours per month, and this requirement can also be met through volunteer work or school. Some exemptions exist for adults with dependent children ages 14 and under and those with medical conditions. Requires states to charge enrollees in Medicaid expansion states with family incomes between 100 and 138 percent of the federal poverty level up to $35 for each health care service, if they qualify for Medicaid based on income alone. Requires states to check eligibility of people on Medicaid expansion every six months instead of annually; Prevents expansion states from using state contributions to pay Medicaid providers higher prices than Medicare would pay; Requires minimum staffing ratios for nursing homes; Requires a five-year waiting period for green card holders before applying to Medicaid, and reduces retroactive Medicaid payments from three months to one month; Limits premium tax credits for immigrants; Reduces Medicaid payments to states with errors and other improper payments; and Prohibits Medicaid from being used for funding Planned Parenthood and similar organizations for one year. In July 2025, Planned Parenthood sued the Trump administration over the provision and a federal judge issued a temporary injunction on the provision. In September 2025, the First U.S. Circuit Court of Appeals overrode the injunction, allowing defunding.
== Arrival in Spain == In Madrid, Alexander von Humboldt pursued the idea of a scientific expedition to Spanish America, despite the usual restrictions on foreign travel in Spanish colonies. Through the assistance of Don Mariano Luis de Urquijo, Spain’s First Secretary of State, whom Humboldt had previously met in London, he was introduced to King Charles IV of Spain. The king granted Humboldt and his companion, Aimé Bonpland, official permission to travel throughout Spanish America for scientific purposes. The royal passports granted Humboldt and Bonpland extensive rights, including the use of scientific instruments, freedom of movement, and the authority to conduct research throughout Spanish territories. Colonial officials were instructed to assist them as needed. Such privileges were exceptional, given that Spain had historically allowed very few foreign scientific missions in its colonies, due to longstanding policies of restricting access to outsiders for reasons of state security, economic monopoly, and religious protection. The level of trust and freedom granted to Humboldt was unprecedented for a non-Spaniard. Humboldt recognized that Spain’s primary interest in granting permission was related to his expertise in mineralogy and the potential for discovering new mineral resources, rather than purely scientific advancement.
=== Role in disease === Intestinal macrophages have been shown to play a role in inflammatory bowel disease (IBD), such as Crohn's disease (CD) and ulcerative colitis (UC). In a healthy gut, intestinal macrophages limit the inflammatory response in the gut, but in a disease-state, intestinal macrophage numbers and diversity are altered. This leads to inflammation of the gut and disease symptoms of IBD. Intestinal macrophages are critical in maintaining gut homeostasis. The presence of inflammation or pathogen alters this homeostasis, and concurrently alters the intestinal macrophages. There has yet to be a determined mechanism for the alteration of the intestinal macrophages by recruitment of new monocytes or changes in the already present intestinal macrophages. Additionally, a new study reveals macrophages limit iron access to bacteria by releasing extracellular vesicles, improving sepsis outcomes.
== Further reading == Gregory, Kelvin B.; Bond, Daniel R.; Lovley, Derek R. (June 2004). "Graphite electrodes as electron donors for anaerobic respiration". Environmental Microbiology. 6 (6): 596–604. Bibcode:2004EnvMi...6..596G. doi:10.1111/j.1462-2920.2004.00593.x. ISSN 1462-2912. PMID 15142248.
Sources: en.wikipedia.org
=== Palmar and plantar aponeuroses and extensor hood === The palmar aponeuroses occur on the palms of the hands. The extensor hoods are aponeuroses at the back of the fingers. The plantar aponeuroses occur on the plantar aspect of the foot. They extend from the calcaneal tuberosity then diverge to connect to the bones, ligaments and the dermis of the skin around the distal part of the metatarsal bones.
=== Diagnostics === As anti-angiogenic cancer therapies have achieved widespread use, there has been increased interest in non-invasive monitoring of angiogenesis. One of the most extensively examined targets of angiogenesis is integrin αVβ3. Radiolabeled peptides containing RGD show high affinity and selectivity for integrin αVβ3 and are being investigated as tools to monitor treatment response of tumors via PET imaging. These include 18F-Galacto-RGD, 18F-Fluciclatide-RGD, 18F-RGD-K5, 68Ga-NOTA-RGD, 68Ga-NOTA-PRGD2, 18F-Alfatide, 18F-Alfatide II, and 18F-FPPRGD2. In a meta-analysis of studies using PET/CT in patients with cancer, it was shown that this diagnostic method may be very useful for detecting malignancies and predicting short-term outcomes, although larger-scale studies are needed.
Before the occupation, Jews in the area had become targeted during the Holocaust in the Sudetenland. Only a few weeks later, the Kristallnacht occurred. As elsewhere in Germany, many synagogues were set on fire and numerous leading Jews were sent to concentration camps. Jews and Czechs were not the only afflicted peoples since German socialists, communists and pacifists were widely persecuted as well. Some of the German socialists fled the Sudetenland via Prague and London to other countries. The Gleichschaltung would permanently alter the community in the Sudetenland. However, on 4 December 1938, there were elections in Reichsgau Sudetenland in which 97.32% of the adult population voted for the NSDAP. About a half million Sudeten Germans joined the Nazi Party, 17.34% of the total German population in the Sudetenland (the average NSDAP membership participation in Germany was merely 7.85% in 1944). That means the Sudetenland was one of the most pro-Nazi regions of Nazi Germany. Because of their knowledge of the Czech language, many Sudeten Germans were employed in the administration of the ethnic Czech Protectorate of Bohemia and Moravia as well as in Nazi organizations (Gestapo etc.). The most notable one was Karl Hermann Frank, the SS and police general and Secretary of State in the Protectorate. Nazi Germany occupied Sudetenland from 1938 to 1945. The annexation was supported by many Bohemian and Moravian Germans.
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.