Everything below concerns lyophilization. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-01-07. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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=== Adaptive immune responses === Plain RNAs may be poor immunogens, but antibodies can easily be created against RNA-protein complexes. These types of antibodies are seen in many autoimmune diseases. There have not yet been reports of antibodies against siRNA bound to proteins. Some methods for siRNA delivery attach polyethylene glycol (PEG) to the oligonucleotide, reducing excretion and improving circulating half-life. However, a large Phase III trial of PEGylated RNA aptamer against factor IX had to be discontinued by Regado Biosciences because of a severe anaphylactic reaction to the PEG part of the RNA. This reaction led to death in some cases and raises significant concerns about siRNA delivery when PEGylated oligonucleotides are involved.
== Structure == Epithelial tissue cells can adopt shapes of varying complexity from polyhedral to scutoidal to punakoidal. They are tightly packed and form a continuous sheet with almost no intercellular spaces. All epithelia is usually separated from underlying tissues by an extracellular fibrous basement membrane. The lining of the mouth, lung alveoli and kidney tubules are all made of epithelial tissue. The lining of the blood and lymphatic vessels are of a specialised form of epithelium called endothelium.
The longest-lived isotope of einsteinium, 252Es (half-life 471.7 days) would be more suitable for investigation of physical properties, but it has proven far more difficult to produce and is available only in minute quantities, not in bulk. Einsteinium is the element with the highest atomic number which has been observed in macroscopic quantities in its pure form as einsteinium-253. Like all synthetic transuranium elements, isotopes of einsteinium are very radioactive and are considered highly dangerous to health on ingestion.
== Cultural Award of the State of Hesse (2009) == In 2009, following a temporary revocation of the award, Kermani received the Hesse Cultural Award — along with Cardinal Karl Lehmann; the former president of the Church of Hesse-Nassau; Peter Steinacker; and the vice president of the Central Council of Jews, Salomon Korn. That year's ceremony was held under the theme of interreligious tolerance. The prize was offered to Kermani on March 20, 2009, after the originally intended recipient, Fuat Sezgin, had declined to accept it on the grounds that his co-recipient, Salomon Korn, supported Israel's military actions. On May 13, 2009, Kermani learned that the award intended for him had been revoked. He went on, however, to describe how this view had been shaken by what he described as the aesthetic experience: "For the first time, I thought: I — not just 'one' — I could believe in a cross." On April 24, 2009, Lehmann stated in a letter to Hesse's Minister President Roland Koch that Lehmann "cannot accept the award under these circumstances". Commentators described Lehmann's tone as "subtly ... defamatory", "smug", "mean-spirited", and "condescending"; Kermani, too, found it "defamatory". In the end, after a conversation with Kermani, Lehmann and Steinacker decided to accept the award jointly. The award was ultimately presented to the four laureates on November 26, 2009. At the ceremony, Minister President Koch apologized to Kermani. Kermani donated his prize money to Franz Meurer, the pastor of the Catholic parish of St. Theodor in Cologne-Vingst.
Sources: en.wikipedia.org
=== Mechanism === The use of NPWT to enhance wound healing is thought to be by removing excess extracellular fluid and decreasing tissue edema, which leads to increased blood flow and stabilization of the wound environment. A reduction in systemic (e.g. interleukins, monocytes) and local mediators of inflammation has been demonstrated in experimental models, while decreased matrix metalloproteinase activity and bacterial burden have been documented clinically. In vivo, NPWT has been shown to increase fibroblast proliferation and migration, collagen organization, and to increase the expression of vascular endothelial growth factor and fibroblast growth factor-2, thereby enhancing wound healing.
=== Tahini's === Tahini's is a fast-casual Mediterranean and Middle Eastern fusion restaurant chain founded in London, Ontario, in 2012 by Omar Hamam. The chain is known for blending traditional shawarma with international cuisine, featuring items such as butter chicken shawarma, Jamaican jerk shawarma, and shawarma ramen. As of 2026, Tahini's operates over 70 locations across Canada and has begun expanding into international markets including the United States.
According to the World Database on Protected Areas, 37% of Belize's land territory falls under some form of official protection, giving Belize one of the most extensive systems of terrestrial protected areas in the Americas. By contrast, Costa Rica only has 27% of its land territory protected. Around 20.4% of Belize's marine and coastal areas, which contain the Belize Barrier Reef, are protected. The Belize Barrier Reef is a UNESCO-recognized World Heritage Site and is the second-largest barrier reef in the world, behind Australia's Great Barrier Reef. A remote sensing study conducted by the Water Center for the Humid Tropics of Latin America and the Caribbean (CATHALAC) and NASA, in collaboration with the Forest Department and the Land Information Centre (LIC) of the government of Belize's Ministry of Natural Resources and the Environment (MNRE), and published in August 2010 revealed that Belize's forest cover in early 2010 was approximately 62.7%, down from 75.9% in late 1980. A similar study by Belize Tropical Forest Studies and Conservation International revealed similar trends in terms of Belize's forest cover. Both studies indicate that each year, 0.6% of Belize's forest cover is lost, translating to the clearing of an average of 10,050 hectares (24,835 acres) each year. The USAID-supported SERVIR study by CATHALAC, NASA, and the MNRE also showed that Belize's protected areas have been extremely effective in protecting the country's forests.
== Behaviour and ecology == Emus are diurnal birds and spend their day foraging, preening their plumage with their beak, dust bathing and resting. They are generally gregarious birds apart from the breeding season, and while some forage, others remain vigilant to their mutual benefit. They are able to swim when necessary, although they rarely do so unless the area is flooded or they need to cross a river.
Sources: en.wikipedia.org
The generation of transgenic protocols (whole organism, cell or tissue specific, tagged with reporter genes) has increased the level of information gained by studying these fish. GM fish have been developed with promoters driving an over-production of growth hormone for use in the aquaculture industry to increase the speed of development and potentially reduce fishing pressure on wild stocks. This has resulted in dramatic growth enhancement in several species, including salmon, trout and tilapia. AquaBounty Technologies, a biotechnology company, have produced a salmon (called AquAdvantage salmon) that can mature in half the time as wild salmon. It obtained regulatory approval in 2015, the first non-plant GMO food to be commercialized. As of August 2017, GMO salmon is being sold in Canada. Sales in the US started in May 2021.
She has highlighted concerns including excessive hype around these drugs, questionable biologically-based theories of benefit, blurred lines between medical and recreational use, flawed clinical trial findings, financial conflicts of interest, strong expectancy effects and large placebo responses, small and short-term benefits over placebo, and their potential for difficult and potentially destabilizing experiences and adverse effects, among others.
=== Casting === In February 2025, Jessica Lange, who starred in the first four seasons and briefly appeared in the eight season in 2018, answered a question about her potential return for the thirteenth season: "Oh Christ, no. I mean, I haven't done it for more than 10 years, 12 years, so, no, I'm not doing it." Murphy revealed that Lange was the first person he turned to about the return and she agreed under the condition she would have a musical number. Subsequently, he turned to Sarah Paulson and Evan Peters, who agreed instantly. They both last appeared in the tenth season in 2021. In October 2025, Lange, Paulson, Peters, Emma Roberts, Billie Lourd, Kathy Bates, Angela Bassett, Leslie Grossman, Jessica Lange, and Gabourey Sidibe were all confirmed to return for the thirteenth season, along with the newcomer Ariana Grande. Bates, Bassett and Sibide last appeared in the eight season in 2018. Bates revealed that she would have only one day of filming. In February 2026, John Waters joined the cast, while Joey Pollari joined in April, and Alex Consani and Paul Anthony Kelly joined in May. John Carroll Lynch and Matt Fraser were also confirmed to reprise their roles from Freak Show, with Mena Suvari and Berto Colón also joining the cast. In July, Frances Conroy was confirmed to reprise her role from Coven, with Avantika, Grace Dumdaw, Cara Delevingne, and Charlie Carver also joining the cast. In July 2026, it was reported that Grande dropped out due to scheduling conflicts with the season's production schedule and her Eternal Sunshine Tour.
=== Grafting techniques === Grafting copolymers to a surface can be envisioned as fixing polymeric chains to a structurally different polymer substrate with the intention of changing surface functionality while preserving bulk mechanical properties. The nature and degree of surface functionalization is determined by both the choice of copolymer and the type and extent of grafting.
Dover's powder (a.k.a. pulvis ipecacuanhae et opii) was a medicine against cold and fever. Developed in 1732 by English physician Thomas Dover, the powder was an old preparation of powder of ipecacuanha (which was formerly used to produce syrup of ipecac), opium in powder, and potassium sulfate. Initially designed to treat gout, it was later recommended for general pains, insomnia, and diarrhea, among others. The powder was largely used in domestic practice to induce sweating, to defeat the advance of a common cold, and at the beginning of any attack of fever. It is no longer in use in modern medicine, but remained reputable until about the 1930s. Its inclusion of opium, an addictive substance, led to its discontinuation of use. Dover's powder was banned in India in 1994.
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.