Everything below concerns 胸腺素α1. 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.
20世纪70年代，研究者从胸腺提取物中纯化出多种小肽，Tα1是其中被较早表征的一种。最初的制备依赖组织匀浆和层析步骤，产量低且成分复杂。随着固相肽合成技术成熟，实验室和工业界能够生产与天然序列一致的合成版本。合成肽的纯度可达95%以上，并可通过反相高效液相色谱和质谱进行鉴定。这一转变使研究不再依赖动物胸腺来源。
市售的胸腺素α1通常以冻干粉形式提供，溶解后用于注射。其氨基酸组成包括多个酸性残基，因此在中性pH下带负电荷。该肽可溶于水和生理盐水，但在有机溶剂中溶解度有限。储存条件通常为冻干状态下负20摄氏度，溶解后需冷藏并避免反复冻融。常见的同义词包括胸腺肽α1、thymalfasin和Tα1。
Several factors accelerate degradation: alkaline pH, elevated temperature, exposure to oxidants, and the presence of residual moisture. Deamidation of asparagine residues and oxidation of methionine are the most commonly reported degradation routes. Because the peptide lacks disulfide bonds, it does not undergo the thiol-related aggregation seen in some other biologics, but physical aggregation can still occur at high concentration. Stability data are product-specific, and extrapolating shelf life between formulations is not reliable.
Lyophilized thymosin alpha-1 is generally stored at or below minus twenty degrees Celsius, protected from moisture and light. Short-term handling at ambient temperature is possible for dry powder, but reconstituted solutions degrade faster and are usually kept at two to eight degrees Celsius with a defined expiry of days rather than weeks. Repeated freeze-thaw cycles should be avoided because they promote aggregation and loss of potency. Exact limits depend on the formulation and should follow the supplier's documentation.
| Property | Value | Notes |
|---|---|---|
| 化学分类 | 线性肽 | 由28个氨基酸组成 |
| 分子量 | 约3108 Da | 合成版本一致 |
| 外观 | 白色至类白色粉末 | 冻干品 |
| 溶解度 | 易溶于水 | 微溶于有机溶剂 |
| 储存温度 | -20°C（冻干） | 溶解后2-8°C |
Clinical research has examined the peptide in chronic hepatitis B and C, as a vaccine adjuvant, and in sepsis and oncology settings. Findings across trials are mixed; some report changes in selected immune markers, while others find no clear clinical benefit. Many studies are small and define outcomes differently, which limits comparison. Regulatory approval is confined to a few countries, and the compound is not an approved drug in the United States or most of Europe.
Overall evidence quality varies considerably. A large share of published reports come from single centers, rely on surrogate immunological markers, or lack adequate control groups. Systematic reviews have highlighted this heterogeneity as a barrier to pooling results. Open questions include which patients, if any, might benefit, what treatment duration is appropriate, and whether any effect is independent of standard care. The peptide is often described as an immune modulator rather than a therapy for one disease, which complicates confirmatory trial design.
Identity and purity are assessed with a small set of standard peptide methods. Reversed-phase high-performance liquid chromatography separates the main peak from truncated or oxidized species, and its area percentage is the usual purity measure. Mass spectrometry confirms the observed molecular mass against the expected value, while amino acid analysis or peptide mapping checks composition and sequence. Specifications for research-grade material are often stated as 95 percent or higher, though the exact limit depends on the supplier and the intended use.
Laboratory supplies of the peptide usually arrive as a lyophilized powder in sealed vials. The powder is hygroscopic, so a vial should be allowed to reach room temperature before it is opened to prevent condensation on the contents. Weighing and transfer are best performed in a low-humidity environment with clean tools. Once dissolved, the solution should be mixed gently rather than vortexed, because foaming and shear can reduce recovery of the peptide.
The molecule consists of 28 amino acid residues with an acetyl group attached to the N-terminal serine. Its sequence is acidic overall, with several glutamic and aspartic acid residues distributed along the chain and no cysteine, so disulfide bridges do not form. The peptide carries a net negative charge at physiological pH. Because the N-terminus is blocked, the intact molecule resists degradation by many aminopeptidases, which contributes to its stability in biological fluids.
The peptide is generated in cells by cleavage of prothymosin alpha, a larger acidic protein encoded by the PTMA gene. Prothymosin alpha is expressed in many tissues, not only in the thymus, and its functions include nuclear roles in chromatin-related processes. The 28-residue fragment corresponds to the N-terminal portion of that precursor. How the cleavage occurs and how the fragment's concentration is regulated remain open questions; circulating amounts are small and difficult to measure reliably with routine assays.
Troika, unable to obtain further funding from Activision or other publishers, released its employees in two waves: the first in November 2004, followed by the remaining staff in December, except for its three founders, Anderson, Boyarsky, and Tim Cain. Some employees worked without pay to fix the game. When the company closed in February 2005, it had secured no other game development deals. That month, Boyarsky confirmed that Troika had not been working on a patch for the game since most of its staff had been gone since December 2004. In a 2006 interview, Anderson said that although Troika Games's library had been critically well received, consistent technical issues had marred the perception of the company's games, contributing to Troika's difficulty in obtaining new projects. In 2013, Mitsoda said that Bloodlines was released at "the worst possible time - most people didn't even know we were out ... fans and the Troika [developers] are always going to wonder what the game could have been like with another six months." In a 2017 interview, Boyarsky echoed Mitsoda's sentiments, saying that a further three to six months of development time could have allowed Troika to address many technical flaws, but he was unsure that they could have resolved larger issues. He said, "I feel the second half of the game isn't as good as the first. I feel like we devolved into relying too much on combat at the end." Boyarsky noted that it was impossible to know if the fixes would have made Bloodlines more successful or if it would have remained a niche product.
SGLT2 inhibitors (also called gliflozins or flozins) are a class of medications that inhibit sodium-glucose transport proteins in the nephron (the functional units of the kidney), unlike SGLT1 inhibitors that perform a similar function in the intestinal mucosa. The foremost metabolic effect of this is to inhibit reabsorption of glucose in the kidney and therefore lower blood sugar. They act by inhibiting sodium/glucose cotransporter 2 (SGLT2). SGLT2 inhibitors are used in the treatment of type 2 diabetes. Apart from blood sugar control, gliflozins have been shown to provide significant cardiovascular benefit in people with type 2 diabetes. As of 2014, several medications of this class had been approved or were under development. In studies on canagliflozin, a member of this class, the medication was found to enhance blood sugar control as well as reduce body weight and systolic and diastolic blood pressure.
The Chinese People's Armed Police Coast Guard Bureau, also abbreviated as China Coast Guard is the agency for maritime search and rescue and law enforcement in the territorial waters of the People's Republic of China. The China Coast Guard was formerly the maritime branch of the People's Armed Police (PAP) Border Security Force under the Ministry of Public Security until 2013. In March 2013, China announced it would form a unified Coast Guard commanded by the State Oceanic Administration. This renewed Coast Guard has been in operation since July 2013. As of 1 July 2018, the China Coast Guard was transferred from civilian control of the State Council and the State Oceanic Administration, to the People's Armed Police, ultimately placing it under the command of the Central Military Commission (CMC). According to Joel Wuthnow of the Institute for National Strategic Studies, the Coast Guard Command within the People's Armed Police possibly is of Corps Leader Grade, led by a Commandant who usually holds the rank of major general. In June 2018, China Coast Guard was granted maritime rights and law enforcement akin civilian law enforcement agencies in order to carry out contrast of illegal activities, keep peace and order, as well as safeguarding security at sea, when performing duties related to the use of marine resources, protection of marine environment, regulation of fishery, and anti-smuggling. There are currently 3 regional bureaus:
== Impact == Since its initial publication, the monograph has come to be seen as a highly influential work in the field of mathematical biology. It serves as the essential text for most high level mathematical biology courses around the world, and is credited with transforming the field from a niche subject into a standard research area of applied mathematics.
The United States and the Soviet Union engaged in competition vis-à-vis the arts. Cultural competition played out in Moscow, New York, London, and Paris. In 1946 America opened an exhibition called 'Advancing American Art' which gained popularity with the aims of expressing American art, in response the Soviets opened a respective exhibition showcasing Soviet Realism. The Soviets excelled at ballet and chess, the Americans at jazz and abstract expressionist paintings. The US funded its own ballet troupes, and both used ballet as political propaganda, using dance to reflect life style in the "battle for the hearts and minds of men." The defection of a premier dancer became a major coup. Chess was inexpensive enough—and the Russians always won until America unleashed Bobby Fischer. Vastly more expensive was the Space Race, as a proxy for scientific supremacy (with a technology with obvious military uses). As well when it came to sports the two countries both competed in the Olympics during the Cold War period which also created severe tension when the West boycotted the first Russian Olympics in 1980.
Sources: en.wikipedia.org
=== Allegation of misconduct === On May 24, 2018, CNN published an investigation in which eight women accused Freeman of "what some called harassment and others called inappropriate behavior". In response, Freeman made the statement, "Anyone who knows me or has worked with me knows I am not someone who would intentionally offend or knowingly make anyone feel uneasy. I apologize to anyone who felt uncomfortable or disrespected—that was never my intent." One of the women named as an accuser, Tyra Martin, spoke out against her portrayal in CNN's report, saying, "I'm not, never was [a victim]. CNN totally misrepresented the video and took my remarks out of context." According to Essence, Martin "saw many of his [Freeman] comments, though inappropriate, to be said in jest." Freeman's lawyer demanded CNN retract the story. After a period of deliberation, the Screen Actors Guild (SAG) decided not to take any action against Freeman.
== Th22 in diseases == Th22 has both pathologic and protective claimed roles when maintaining immunologic homeostasis. However, the role of Th22 in pathological processes has not been completely identified.
The three substrates of this enzyme are (E)-coniferyl aldehyde, oxidised nicotinamide adenine dinucleotide (NAD+), and water. Its products are ferulic acid, reduced NADH, and a proton. The enzyme can use nicotinamide adenine dinucleotide phosphate as an alternative cofactor. This enzyme belongs to the family of oxidoreductases, specifically those acting on the aldehyde or oxo group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is coniferyl aldehyde:NAD(P)+ oxidoreductase.
After a short introduction from Barbu Petrescu, the mayor of Bucharest and organiser of the rally, Ceaușescu began to speak from the balcony of the Central Committee building, greeting the crowd and thanking the organisers of the rally and the residents of Bucharest. Just over a minute into the speech, a high-pitched scream was heard in the distance. Within seconds, this developed into widespread shouting and screaming, as Ceaușescu looked on while speaking. A few seconds later, he ceased speaking completely, raised his right hand and stared silently at the unfolding chaos. The TV image then shook noticeably and video interference appeared on screen. At that point, Florian Rat, Ceaușescu's bodyguard, appeared and advised Ceaușescu to go inside the building. Censors then cut the live TV feed, but it was too late. The disturbance had already been broadcast, and viewers realised that something highly unusual was occurring. Contrary to many reports, Ceaușescu was not at this point hustled inside the building. Instead, undeterred, he and his wife, Elena, along with other officials, spent almost three minutes trying to understand what was happening and haranguing the confused crowd, some of whom appeared to be trying to leave the area, while others moved towards the Central Committee building. Elena wondered aloud whether there was an earthquake in progress. Ceaușescu repeatedly tapped the microphone, trying to call the attention of the crowd.
Sources: en.wikipedia.org
With oral administration, progesterone accounts for less than 20% of the dose in circulation while 5α- and 5β-reduced products like allopregnanolone and pregnanolone account for around 80%. With vaginal administration, progesterone accounts for around 50% of the dose and 5α- and 5β-reduced metabolites for around 40%. A small amount of progesterone is converted by 21-hydroxylase into 11-deoxycorticosterone. Increases in levels of 11-deoxycorticosterone are markedly higher when progesterone is given orally as opposed to via parenteral routes like vaginal or intramuscular injection. The conversion of progesterone into 11-deoxycorticosterone occurs in the intestines (specifically the duodenum) and in the kidneys. 21-Hydroxylase appears to be absent in the liver, so conversion of progesterone into 11-deoxycorticosterone is thought not to occur in this part of the body. Endogenous progesterone is metabolized approximately 50% into 5α-dihydroprogesterone in the corpus luteum, 35% into 3β-dihydroprogesterone in the liver, and 10% into 20α-dihydroprogesterone. Metabolites of progesterone with one or more available hydroxyl groups are conjugated via glucuronidation and/or sulfation and excreted. The biological half-life of progesterone in the circulation is very short; with intravenous injection, its half-life has ranged widely from 3 to 90 minutes in various studies. The metabolic clearance rate of progesterone ranges between 2,100 and 2,800 L/day, and is constant across the menstrual cycle.
=== 2 September === Thirteen people were killed in an SAF drone strike on a market in Mellit. The SAF-aligned government said that it would continue to open the Adre border crossing with Chad until the end of the year.
== Technology overview == Point-of-care tests are simple medical tests that can be performed at the bedside. In many cases, the simplicity was not achievable until technology developed not only to make a test possible at all but then also to mask its complexity. For example, various kinds of urine test strips have been available for decades, but portable ultrasonography did not reach the stage of being advanced, affordable, and widespread until the 2000s and 2010s. Today, portable ultrasonography is often viewed as a "simple" test, but there was nothing simple about it until the more complex technology was available. Similarly, pulse oximetry can test arterial oxygen saturation in a quick, simple, noninvasive, affordable way today, but in earlier eras this required an intra-arterial needle puncture and a laboratory test; and rapid diagnostic tests such as malaria antigen detection tests or COVID-19 rapid tests that rely on a state of the art in immunology that did not exist until recent decades. Thus, over decades, testing continues to move toward the point of care more than it formerly had been. A recent survey in five countries (Australia, Belgium, the Netherlands, the UK and the US) indicates that general practitioners / family doctors would like to use more POCTs. The driving notion behind POCT is to bring the test conveniently and immediately to the patient. This increases the likelihood that the patient, physician, and care team will receive the results quicker, which allows for better immediate clinical management decisions to be made.
PhCH2OH + COCl2 → PhCH2OC(O)Cl + HCl Phosgene is used in excess to minimise the production of the carbonate (PhCH2O)2C=O. The use of phosgene gas in the lab preparation carries a very large health hazard, and has been implicated in the chronic pulmonary disease of pioneers in the usage of the compound such as Zervas.
=== Effect of vigorous exercise === When running, breasts may move three-dimensionally: vertically, horizontally and laterally, in an overall figure-8 motion. Unrestrained movement of large breasts may contribute to sagging over time. Motion studies have revealed that when a woman runs, more than 50% of the breast's total movement is vertical, 22% is side-to-side, and 27% is in-and-out. A 2007 study found that encapsulation-type sports bras, in which each cup is separately molded, are more effective than compression-type bras, which press the breasts close to the body, at reducing total breast motion during exercise. Encapsulation bras reduce motion in two of the three planes, while compression bras reduce motion in only one plane. Previously, it was commonly believed that a woman with small- to medium-size breasts benefited most from a compression-type sports bra, and women with larger breasts needed an encapsulation-type sports bra.
Sources: en.wikipedia.org
它不是经典的内分泌激素，而是一种免疫调节肽。其作用主要通过局部免疫细胞间的信号传递实现，而非经血液循环作用于远隔器官。
天然胸腺素α1主要从胸腺组织提取，也可在脾脏和淋巴结中检出。目前研究和临床使用的多为化学合成版本，不再依赖动物组织。
胸腺素组分5是牛胸腺提取物的粗组分，包含多种肽。胸腺素α1是其中一种被纯化和表征的单一肽，具有明确的28个氨基酸序列。
Dry lyophilized powder tolerates short ambient exposure during handling and shipping. Long-term room-temperature storage is not recommended because moisture uptake and slow degradation can occur over months. Storage at minus twenty degrees Celsius is the common practice for extended periods.