Thymosin fraction 5 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 2026-04-14. Where a claim depends on a specific study, the study is described rather than over-claimed.
在信号层面，Tα1可能通过Toll样受体等模式识别受体发挥作用。部分实验显示，它能激活髓样分化因子88依赖的通路，进而促进核因子κB进入细胞核。这导致白细胞介素2、干扰素γ和白细胞介素12等细胞因子的转录增加。这些细胞因子偏向辅助性T细胞1型应答，有助于细胞免疫。然而，具体受体和结合位点尚未完全确定，不同实验模型的结果存在差异。
临床研究将Tα1用于慢性病毒感染、肿瘤辅助治疗和疫苗佐剂等场景。部分试验报告了免疫学指标改善，但临床终点获益在不同研究中并不一致。系统综述指出，研究间在人群、剂量和联合方案上差异较大，难以汇总结论。因此，Tα1的确切临床地位仍属开放问题，需要更多高质量随机对照试验来澄清。其机制研究也需从体外实验向体内模型推进。
Thymosin alpha-1 is a synthetic peptide of 28 amino acid residues that corresponds to a naturally occurring fragment first isolated from thymus tissue. Its chain is acetylated at the amino terminus, a modification that shields the peptide from rapid cleavage by aminopeptidases. The molecule carries a net negative charge at physiological pH and dissolves freely in water. Researchers classify it as an immune-modulating agent rather than a classical hormone, because it acts on several cell types of both the innate and the adaptive immune system.
The peptide was identified during work in the 1970s on thymosin fraction 5, a partially purified extract of calf thymus. Investigators separated that mixture and characterized individual components, one of which they named thymosin alpha-1. The same compound later received the international nonproprietary name thymalfasin. Commercial material is produced by solid-phase peptide synthesis rather than by extraction, so synthetic and natural forms share an identical sequence. Naming conventions vary across the literature, and readers should distinguish the alpha-1 peptide from other thymosins that have unrelated sequences and functions.
| Property | Value | Notes |
|---|---|---|
| 主要靶细胞 | T细胞、树突状细胞 | 也影响NK细胞 |
| 信号通路 | TLR/MyD88/NF-κB | 部分实验模型 |
| 细胞因子偏向 | Th1型 | 增加IL-2、IFN-γ |
| 给药途径 | 皮下注射 | 临床常用 |
| 半衰期 | 约2小时 | 血浆中较短 |
=== United Kingdom === Since 15 January 2025 it is covered by the UK's generic definition on 2-benzyl benzimidazole derived opioids because it contains the backbone with only the following modifications:
Dendritic cell therapy provokes anti-tumor responses by causing dendritic cells to present tumor antigens to lymphocytes, which activates them, priming them to kill other cells that present the antigen. Dendritic cells are antigen-presenting cells (APCs) in the mammalian immune system. In cancer treatment, they aid cancer antigen targeting. The only approved cellular cancer therapy based on dendritic cells is sipuleucel-T. One method of inducing dendritic cells to present tumor antigens is by vaccination with autologous tumor lysates or short peptides (small parts of the protein that correspond to the protein antigens on cancer cells). These peptides are often given in combination with adjuvants (highly immunogenic substances) to increase the immune and anti-tumor responses. Other adjuvants include proteins or other chemicals that attract and/or activate dendritic cells, such as granulocyte-macrophage colony-stimulating factor (GM-CSF). The most common sources of antigens used for dendritic cell vaccine in glioblastoma (GBM) as an aggressive brain tumor were whole tumor lysate, CMV antigen RNA and tumor-associated peptides like EGFRvIII. Dendritic cells can also be activated in vivo by making tumor cells express GM-CSF. This can be achieved by either genetically engineering tumor cells to produce GM-CSF or by infecting tumor cells with an oncolytic virus that expresses GM-CSF. Another strategy is to remove dendritic cells from the blood of a patient and activate them outside the body.
=== Symbols === The Culture has no flag, symbol or logo. According to Consider Phlebas, people can recognise items made by the Culture implicitly, by the way they are simple, efficient and aesthetic. The main outright symbol of the Culture is its language, Marain, which is used far beyond the Culture itself. It is often employed in the galaxy as a de facto lingua franca among people who don't share a language. Marain has a similar purpose to other constructed languages encountered in utopian and dystopian fiction including Pravic in The Dispossessed and Newspeak in Nineteen Eighty-Four.
Sources: en.wikipedia.org
== History == Ripasudil (in the form of ripasudil hydrochloride hydrate) was approved by the PMDA of Japan on September 26, 2014. Glanatec, the trade name of the approved formulation, takes the form of an eye drop solution of 0.4% ripasudil, equivalent to 4 g of ripasudil per 1000 mL of solution. The solution is developed, marketed, and distributed by Kowa Pharmaceuticals, but the compound itself was discovered by D. Western Therapeutics Institute, a company who specializes in protein kinase inhibitory compounds. In September 2002, Kowa Company entered a licensing agreement with D. Western Therapeutics Institute, Inc. with regard to global rights of ripasudil. Under this agreement, D. Western Therapeutics Institute is eligible to receive milestone payments from Kowa. Kowa Company was issued a US patent (No. 8,193,193, entitled ‘‘Agent for prevention or treatment of glaucoma’’) on June 5, 2012 for the use of ripasudil in patients with glaucoma. As of June 25th, 2013, Glanatec is a registered U.S. federal trademark attributed to Kowa.
Umami ( from Japanese: うま味, pronounced [ɯmami]), or savoriness, is one of the five basic tastes. It is characteristic of broths and cooked meats. People taste umami through taste receptors that typically respond to glutamates and nucleotides, which are widely present in meat broths and fermented products. Glutamates are commonly added to some foods in the form of monosodium glutamate (MSG), and nucleotides are commonly added in the form of disodium guanylate, inosine monophosphate (IMP) or guanosine monophosphate (GMP). Since umami has its own receptors rather than arising out of a combination of the traditionally recognized taste receptors, scientists now consider umami to be a distinct taste. Food, beverages, or condiments that have a strong umami flavor include meats, shellfish, fish (including fish sauce and preserved fish such as Maldives fish, katsuobushi, sardines, and anchovies), dashi, tomatoes, mushrooms, hydrolyzed vegetable protein, meat extract (Bouillon cubes), yeast extract (beer, Marmite, Vegemite), kimchi, cheeses (Parmesan, Asiago cheese, or blue cheese), as well as sauces such as A1 sauce, Worcestershire sauce, and soy sauce. In 1908, Kikunae Ikeda of the University of Tokyo scientifically identified umami as a distinct taste attributed to glutamic acid. As a result, in 1909, Ikeda and Saburōsuke Suzuki founded Ajinomoto Co., Inc.
In 2007, Waffle House repurchased the original restaurant, which had been sold by the chain in the early 1970s. The company restored it using original blueprints for use as a private company museum. The museum is used primarily for internal corporate events and tours. In 2008, one of the biggest Waffle House franchises in the southeast, North Lake Foods, was bought out by Waffle House, Inc. North Lake Foods filed for Chapter 11 bankruptcy protection and closed some stores. Waffle House, Inc. plans to rehabilitate the franchise. In early 2009, East Coast Waffles bought North Lake Foods to become a new franchise. The founders of the Waffle House brand died in 2017 within two months of each other: Joe Rogers Sr. died on March 3 and Tom Forkner on April 26. On September 8, 2024, it was reported that Walter G. Ehmer, who oversaw Waffle House since 2012, had died. In 2025, Waffle House introduced canned cold brew as a new "all-star" to its lineup as a limited run in nine locations, all of which are in Atlanta.
== Stigmata and gender == In the late nineteenth century, a French physician named Dr. Antoine Imbert-Goubeyre began compiling a census of known stigmatics from the thirteenth century to his own time. This census includes 280 female and 41 male stigmatics, meaning women comprise a little over 87% of the list. Additionally, the University of Antwerp released a database of information on 244 stigmatics in April 2019. 92% of the stigmatics in the database are female. In some cases, convent sisters have attempted to shield stigmatic women from public scrutiny, often out of fear of how their condition would affect the convent's reputation. So, the number of women stigmatics may be even higher than historical record shows. Despite the high number of women stigmatics throughout history, the best-known and least contested stigmatics, such as Francis of Assisi and Padre Pio, have been men.
Sources: en.wikipedia.org
它促进未成熟T细胞分化并增强成熟T细胞的增殖与细胞因子分泌。这些作用有助于放大抗原特异性免疫应答。
目前认为它可能通过Toll样受体等模式识别受体传递信号，但精确的受体身份和结合机制尚未完全阐明。
不同试验在患者选择、给药方案、联合治疗和终点定义上差异很大。这些异质性使得跨研究比较困难，结论难以统一。
It is a 28-residue synthetic peptide studied as an immune-modulating agent and approved as a drug in some countries. The sequence matches a naturally occurring fragment isolated from thymus tissue. It is not a hormone in the endocrine sense.