Everything below concerns heptapeptide. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-06-10. Numbers and descriptions here follow the published literature rather than marketing material.
Semax 是一种人工合成的七肽，氨基酸序列为 Met-Glu-His-Phe-Pro-Gly-Pro，单字母缩写记作 MEHFPGP。它被归类为促肾上腺皮质激素片段 ACTH(4-10) 的结构类似物，但并不天然存在于生物体内。母体片段 ACTH(4-10) 的序列为 Met-Glu-His-Phe-Arg-Trp-Gly，Semax 替换了中间两个残基，并在羧基端延长了 Pro-Gly-Pro 三肽。这种延长被普遍认为能提升分子对肽酶的耐受性。
该化合物于二十世纪八十年代在俄罗斯被开发，相关工作由俄罗斯科学院分子遗传学研究所的研究团队主导。开发目标并非复制 ACTH 的完整激素活性，而是寻找保留其神经作用方向、同时去除促肾上腺皮质激素释放效应的短肽片段。研究记录显示，这一方向促成了多个相关短肽的合成与筛选，而 Semax 是其中被研究最广泛的一个。当地文献常以 Семакс 这一名称指代它。
研究兴趣主要集中在神经营养因子相关的路径上，包括脑源性神经营养因子与神经生长因子的表达变化。部分实验报告称在特定条件下观察到这些因子的水平上升，但具体信号通路和剂量依赖关系仍未完全厘清。多数公开数据来自细胞模型和动物实验，人体对照研究数量有限。因此，该化合物的作用机制在文献中属于活跃讨论，而非已经确立的定论。
Semax is a synthetic heptapeptide whose sequence is Met-Glu-His-Phe-Pro-Gly-Pro. The first four residues correspond to the ACTH(4-10) fragment, while the terminal Pro-Gly-Pro extension was added to improve metabolic stability. Its molecular formula is C37H51N9O10S and its monoisotopic mass is approximately 813.9 Da. The compound is classified as a peptide research chemical and as a registered pharmaceutical product in Russia, but it does not hold marketing approval in the European Union or the United States. Naming conventions vary across supplier catalogs.
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.
| Property | Value | Notes |
|---|---|---|
| 化学类别 | 合成七肽 | ACTH(4-10) 结构类似物 |
| 氨基酸序列 | Met-Glu-His-Phe-Pro-Gly-Pro | 单字母写作 MEHFPGP |
| 分子量 | 约 813.9 Da | 随确切形式和盐型略有变化 |
| 常见同义词 | ACTH(4-10) 类似物 | 俄语文献称 Семакс |
| 开发来源 | 俄罗斯 | 二十世纪八十年代 |
Semax is a synthetic peptide created in the Soviet Union during the early 1980s by researchers working in Moscow. It was built from the short adrenocorticotropic hormone fragment known as ACTH(4-10), and the chain was then extended with three additional amino acids. The resulting molecule was named semax and entered clinical use in Russia in 1994. It is generally described as a nootropic and neuroprotective agent rather than as a hormone analogue.
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.
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。
Terminology around the compound varies by source. It appears in catalogues and papers as Semax, as the heptapeptide ACTH(4-7)-Pro-Gly-Pro, and under various alphanumeric laboratory codes used by individual suppliers. These names refer to the same sequence but may imply different salt forms, purity grades, or counter-ions. Peptide databases usually list the free base mass, while product descriptions sometimes report acetate or trifluoroacetate salts with a different formula weight. Because naming conventions for research peptides are not standardised across vendors, checking the declared sequence and measured mass is more reliable than relying on a trade name alone.
Semax is a synthetic heptapeptide with the sequence Met-Glu-His-Phe-Pro-Gly-Pro. Its design combines the ACTH(4-7) core fragment with a C-terminal Pro-Gly-Pro extension, a modification intended to improve stability and prolong activity. The molecule is hydrophilic, carries no lipid chains or glycosylation, and has a theoretical mass just over 810 daltons in its free form. All seven residues are proteinogenic amino acids, so no non-natural building blocks appear in the backbone. A free N-terminal methionine and C-terminal proline define the unmodified parent peptide.
The compound was developed during the 1980s at the Institute of Molecular Genetics in Moscow as part of research on fragments of adrenocorticotropic hormone. Early work examined short ACTH-derived sequences that retained neurotrophic effects while lacking the endocrine activity of the full hormone. Semax entered clinical use in Russia during the 1990s, where it received registration for several neurological indications. Outside that region it remained primarily a laboratory research material rather than an approved therapeutic. English-language literature on it grew more slowly and frequently cited the original Russian studies.
=== Tokusou Combinations === Dekaranger Robo (デカレンジャーロボ, Dekarenjā Robo): The Dekarangers' first giant robot composed of the five main Deka Machines that wields the Signal Cannon, which allows it to perform the Justice Flasher (ジャスティスフラッシャー, Jasutisu Furasshā) finisher, and the Judgement Sword, which allows it to perform the Judgement Crash (ジャッジメントクラッシュ, Jajjimento Kurasshu) finisher. Super Dekaranger Robo (スーパーデカレンジャーロボ, Gattai Sūpā Dekarenjā Robo): The Super Tokusou Combination (超特捜合体, Chō Tokusō Gattai) of Dekaranger Robo and the Deka Bike that is equipped with a series of boosters. Its finishers are the Gatling Punch (ガトリングパンチ, Gatoringu Panchi) and the Dynamite Upper (ダイナマイトアッパー, Dainamaito Appā). Dekaranger Robo Full Blast Custom (デカレンジャーロボ フルブラストカスタム, Dekarenjā Robo Furu Burasuto Kasutamu): A combination of Dekaranger Robo and the Blast Buggy that wields the Blast Launcher (ブラストランチャー, Burasuto Ranchā) and the Blast Shield (ブラストシールド, Burasuto Shīrudo), which allows it to perform the Spinning Blast (スピニングブラスト, Supiningu Burasuto) attack. The Blast Launcher and Shield can also combine to form the Full Blast Launcher (フルブラストランチャー, Furu Burasuto Ranchā), which allows Dekaranger Robo to perform the Full Blast (フルブラスト, Furu Burasuto) finisher. This formation appears exclusively in the film Tokusou Sentai Dekaranger The Movie: Full Blast Action.
=== Oral GLP-1 Semaglutide Generic === SCD has been developing an oral generic version of semaglutide, the active ingredient in Novo Nordisk's Wegovy and Ozempic. In January 2026, SCD signed a partnership agreement with Daiichi Sankyo Espha, a subsidiary of Japan's Daiichi Sankyo, for the exclusive sale of oral semaglutide generics in Japan. Some industry observers and analysts have questioned the company's public statements regarding this product. A commentary published by the Korea Biomedical Review in July 2025 noted that SCD's claims of a potential 2026 market launch for its oral semaglutide generic appeared to overstate the company's regulatory position, given that secondary patents on semaglutide formulations are widely expected to remain in force until at least 2031 in most major markets.
Nonlinear two-dimensional infrared spectroscopy is the infrared version of correlation spectroscopy. Nonlinear two-dimensional infrared spectroscopy is a technique that has become available with the development of femtosecond infrared laser pulses. In this experiment, first a set of pump pulses is applied to the sample. This is followed by a waiting time during which the system is allowed to relax. The typical waiting time lasts from zero to several picoseconds, and the duration can be controlled with a resolution of tens of femtoseconds. A probe pulse is then applied, resulting in the emission of a signal from the sample. The nonlinear two-dimensional infrared spectrum is a two-dimensional correlation plot of the frequency ω1 that was excited by the initial pump pulses and the frequency ω3 excited by the probe pulse after the waiting time. This allows the observation of coupling between different vibrational modes; because of its extremely fine time resolution, it can be used to monitor molecular dynamics on a picosecond timescale. It is still a largely unexplored technique and is becoming increasingly popular for fundamental research. As with two-dimensional nuclear magnetic resonance (2DNMR) spectroscopy, this technique spreads the spectrum in two dimensions and allows for the observation of cross peaks that contain information on the coupling between different modes. In contrast to 2DNMR, nonlinear two-dimensional infrared spectroscopy also involves the excitation to overtones.
Sources: en.wikipedia.org
9 December – In a speech to European finance leaders in Brussels, Chancellor Rachel Reeves says that closer relations between the UK and the European Union will boost economic growth. The UK and German governments agree a new deal aimed at prosecuting those who smuggle migrants. Cammy Day confirms he has stepped down as leader of Edinburgh City Council after Police Scotland launched an investigation into allegations he bombarded Ukrainian refugees with questions, including those of a sexual nature. 10 December – A Scottish Government spokesman confirms that First Minister John Swinney has spoken by phone with US president-elect Donald Trump for the first time since his re-election, and described the 20 minute discussion as "positive". The Scottish Government backs plans to bar dual mandates – MSPs who also sit as MPs or members of the House of Lords – from sitting at Holyrood after the 2026 Scottish Parliament election. 10 December – The Stormont Assembly debates Northern Ireland's post-Brexit trade agreement, and votes to extend it for a further four years. Billionaire property developer and former Conservative donor Nick Candy is appointed as Reform UK's treasurer. 11 December – A Parliamentary committee is established to examine the Terminally Ill Adults (End of Life) Bill. 12 December – The House of Lords Conduct Committee recommends Conservative peer Baroness Meyer should be suspended for three weeks for calling a peer of Indian origin "Lord Poppadum" after an investigation found her comments amounted to harassment.
All nuclear data not otherwise stated is from the standard source: There are 42 known isotopes of polonium (84Po), all radioactive, stretching from 186Po to 227Po. The isotopes 210 through 218 occur naturally in the four principal decay chains. In terms of curies they are mostly of even mass number, coming from uranium-238 and thorium-232, with smaller amounts of 211 and 215 from uranium-235, and very little with mass number 213 coming from neptunium-237, and much less with mass number 217 coming from a rare branch of the neptunium decay chain. 210Po has the longest half-life by far (138.376 days) and is, therefore, the most abundant by far in terms of moles or mass. It is also the most easily synthesized isotope, by neutron capture on natural bismuth, and so by far the most abundant artificial isotope as well. Two other isotopes have longer lives: 209Po with a half-life of 124 years and 208Po with a half-life of 2.898 years. Both are made by using a cyclotron to bombard bismuth with protons.
Relugolix, sold under the brand names Orgovyx and Relumina among others, is a gonadotropin-releasing hormone antagonist (GnRH receptor antagonist) medication which is used in the treatment of prostate cancer, uterine fibroids and endometriosis. It is taken by mouth. Side effects of relugolix include menstrual abnormalities, hot flashes, excessive sweating, headache, and decreased bone mineral density. Relugolix is a GnRH antagonist, or an antagonist of the gonadotropin-releasing hormone receptor. Unlike most other GnRH modulators, but similarly to elagolix (brand name Orilissa), relugolix is a non-peptide, small-molecule compound and is orally active. It suppresses sex hormone levels to the postmenopausal or castrate range in both women and men.
Sources: en.wikipedia.org
不是。Semax 是完全人工合成的七肽，自然界中没有对应的已知肽段。它的设计灵感来自促肾上腺皮质激素片段 ACTH(4-10)，但序列经过了替换和延长。
Semax 被描述为 ACTH(4-10) 的结构类似物，两者共享部分序列特征。它保留了该片段的部分神经相关活性方向，但去除了完整片段带来的激素释放效应。二者并非同一物质，也不能互相替代。
加入的 Pro-Gly-Pro 三肽被普遍认为能提升分子对蛋白水解酶的稳定性。这种设计让短肽在体内维持时间更长。具体延长的程度以及不同组织中是否一致，文献中仍存在不同报告。
It is a synthetic peptide of seven amino acids. Its backbone corresponds to a fragment of adrenocorticotropic hormone extended at the carboxyl end. The material is distributed as a lyophilized solid for laboratory use.