The short version of immune modulation fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-03-10. Anything still debated is marked as such rather than presented as settled.
Thymosin alpha 1 is a synthetic 28-amino-acid peptide first isolated in 1966 from thymosin fraction 5, a bovine thymus extract. Its chain begins with an acetylated serine residue and ends with asparagine. The native peptide carries a molecular mass near 3,108 daltons. Researchers classify it as an immunomodulatory agent rather than a hormone with a single endocrine target. Early work framed it as a thymus-derived factor that supports T-cell maturation. The synthetic form used in research and clinical products matches the natural sequence.
Immune signaling studies link thymosin alpha 1 to Toll-like receptor pathways, particularly TLR2 and TLR9, on dendritic cells and other antigen-presenting cells. Activation of these receptors promotes maturation of T cells and increases natural killer cell activity. The peptide shifts cytokine output toward a T helper 1 profile, raising interferon gamma and interleukin 2 while modulating interleukin 10. Whether these effects translate into clinical benefit for any specific disease remains a subject of debate. Reported outcomes vary across trials and populations.
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。
胸腺素α1对免疫系统的影响涉及多种细胞类型。研究表明，它可促进未成熟T细胞向成熟T细胞分化，并增强T细胞对抗原刺激的增殖反应。树突状细胞在Tα1存在下表达更高水平的共刺激分子，从而更有效地呈递抗原。此外，自然杀伤细胞的活性也观察到上升。这些效应并非直接杀伤病原体，而是调节宿主免疫应答的强度与方向。
| Property | Value | Notes |
|---|---|---|
| Molecular mass | ≈3,108 Da | Synthetic 28-residue peptide |
| Amino acid count | 28 | N-terminal serine carries an acetyl group |
| Appearance | White to off-white powder | Lyophilized solid |
| Water solubility | Freely soluble | Dissolves in aqueous buffer |
| Common synonyms | Thymalfasin; Tα1 | Thymalfasin is the international nonproprietary name |
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.
Thymosin alpha 1 was identified in 1977 as a component of thymosin fraction 5, a heterogeneous preparation used in early studies of thymic function. Investigators purified the active material and determined its amino acid sequence, which enabled chemical synthesis. Work in the following decades concentrated on T-cell maturation and immune reconstitution in animals and small human cohorts. Early preparations varied in composition, so results from that period are difficult to compare with studies using defined synthetic peptide.
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.
Routine handling calls for storage of the lyophilized powder at refrigerated temperatures, away from light, in a sealed container. Working solutions are often prepared in sterile water or buffer and kept cold between uses. Repeated freeze-thaw cycles are generally avoided because they can promote aggregation and loss of material. Laboratories usually record lot number, reconstitution date, and storage conditions so that any change in behavior can be traced to a specific preparation.
Reverse-phase high-performance liquid chromatography is the standard technique for assessing purity and concentration, because the peptide's hydrophobicity allows clean separation from related impurities. Mass spectrometry confirms molecular identity and detects sequence errors or truncations. Amino acid analysis and peptide mapping supply additional structural confirmation when required. Chromatographic purity values reported on certificates of analysis describe the proportion of the main peak and do not by themselves establish biological activity.
Thymosin alpha-1 is a synthetic peptide of 28 amino acids, corresponding to the N-terminal fragment of prothymosin alpha. Its sequence begins with acetylation at the N-terminus, a modification that affects stability and receptor interaction. The peptide is acidic, with a calculated isoelectric point near 4.2, and carries no disulfide bonds, so its secondary structure is largely flexible in solution. Molecular mass is approximately 3108 daltons. The native form was first isolated from bovine thymus tissue, while pharmaceutical material is produced by solid-phase peptide synthesis.
Within the immune system, the peptide acts on several cell types rather than a single target. Reported activities include promotion of T-cell maturation, enhancement of natural killer cell activity, and modulation of cytokine production by dendritic cells and macrophages. Some of these effects appear to operate through toll-like receptor signaling, though the precise receptor-level mechanism remains debated. Whether the observed immune changes translate into clinical benefit is a separate question and depends on the indication studied.
Identity and purity are assessed mainly by reversed-phase high-performance liquid chromatography, which separates the peptide from closely related impurities and from truncated or oxidized variants. Mass spectrometry supplies the molecular mass and confirms the expected sequence length, while amino acid analysis can be used to check composition. Because the molecule has no chromophore beyond the peptide backbone, ultraviolet detection is typically performed at a low wavelength, where baseline interference from solvents and buffers is a practical concern. Water content and counter-ion content are often reported alongside purity.
Practical handling focuses on limiting adsorption and contamination. The peptide dissolves readily in water, and dilute solutions tend to adhere to plastic and glass surfaces, so an inert carrier protein or a defined buffer can reduce losses in laboratory work. Workers also record the counter-ion form, since an acetate or trifluoroacetate salt changes the mass balance of the weighed powder. Documentation of lot number, purity value, and storage history supports reproducibility when results from different laboratories are compared.
Lyophilized material is generally held at reduced temperature to slow degradation, and storage at minus twenty degrees Celsius or lower is common practice for long-term retention. Short-term working portions are often kept between two and eight degrees Celsius. Once dissolved, the peptide is less stable than the dry powder, and repeated freeze-thaw cycles are associated with loss of material and with aggregate formation. Vials are usually allowed to reach room temperature before opening so that condensation does not introduce moisture, and solutions are protected from light where practical.
BCG has been one of the most successful immunotherapies. BCG vaccine has been the "standard of care for patients with bladder cancer (NMIBC)" since 1977. By 2014, more than eight different considered biosimilar agents or strains were used to treat nonmuscle-invasive bladder cancer.
Diffusion pumps blow out gas molecules with jets of an oil or mercury vapor, while turbomolecular pumps use high speed fans to push the gas. Both of these pumps will stall and fail to pump if exhausted directly to atmospheric pressure, so they must be exhausted to a lower grade vacuum created by a mechanical pump, in this case called a backing pump. As with positive displacement pumps, the base pressure will be reached when leakage, outgassing, and backstreaming equal the pump speed, but now minimizing leakage and outgassing to a level comparable to backstreaming becomes much more difficult.
Diabetes mellitus type 1 is a chronic autoimmune disease in which the immune system attacks the insulin-secreting beta cells of the pancreas. Insulin is needed to keep blood sugar levels within optimal ranges, and its lack can lead to high blood sugar. As an untreated chronic condition, complications including accelerated vascular disease, diabetic retinopathy, kidney disease and neuropathy can result. In addition, if there is not enough insulin for glucose to be used within cells, the medical emergency diabetic ketoacidosis, which is often the first symptom that a person with type 1 diabetes may have, can result. Type 1 diabetes can develop at any age but is most often diagnosed before age 40. For people living with type 1 diabetes, insulin injections are critical for survival. An experimental procedure to treat type 1 diabetes is pancreas transplantation or isolated transplantation of islet cells to supply a person with functioning beta cells.
Many transcription factors contain a structure known as a zinc finger, a structural module in which a region of protein folds around a zinc ion. The zinc does not directly contact the DNA that these proteins bind to. Instead, the cofactor is essential for the stability of the tightly folded protein chain. In these proteins, the zinc ion is usually coordinated by pairs of cysteine and histidine side-chains.
Sources: en.wikipedia.org
Journalist Dmitry Kiselyov listed the targets in the United States, which includes The Pentagon, Camp David, Fort Ritchie, McClellan Air Force Base, and Jim Creek Naval Radio Station. Kremlin spokesperson Dmitry Peskov denies the existence of the target list. On February 24, 2022, in a televised address preceding the start of the Russo-Ukrainian war (2022–present), Russian President Vladimir Putin stated that Russia "is today one of the most powerful nuclear powers in the world... No one should have any doubts that a direct attack on our country will lead to defeat and dire consequences for any potential aggressor." Later in the same speech, Putin stated: "Now a few important, very important words for those who may be tempted to intervene in ongoing events. Whoever tries to hinder us, and even more so to create threats for our country, for our people, should know that Russia's response will be immediate and will lead you to such consequences that you have never experienced in your history." On February 27, 2022, Putin publicly put his nuclear forces on alert, stating that NATO powers had made "aggressive statements". On April 14, The New York Times reported comments by CIA director William Burns, who said "potential desperation" could lead President Putin to order the use of tactical nuclear weapons.
==== Post-third round developments ==== France warned that if no deal was reached on Iran's nuclear program, it was prepared to trigger the snapback mechanism to reinstate U.N. sanctions that were lifted under the JCPOA. Along with Britain and Germany, France could activate this process before the JCPOA expired in October, which would permanently cut Iran off from key technology, investment, and European markets, dealing a severe blow to its economy; however, Iranian foreign minister Araghchi later warned the European parties against initiating snapback sanctions, cautioning that such a move would severely harm the negotiations—a warning he repeated several times in the following weeks. Iran proposed holding further talks with European participation, while also offering investment opportunities. On April 30, the US Treasury sanctioned 6 Chinese chemical components companies connected to Iran. On May 1, defense secretary Hegseth posted that Iran will pay for supporting Houthi attacks on merchant ships in Red Sea crisis. President Trump warned of secondary sanctions on entities buying any oil or petrochemicals from Iran. Rubio warned to walk away from nuclear enrichment. Araghchi canceled the May 4 meeting citing a "technical reason". Trump has called for the full dismantling of nuclear enrichment. Iran then unveiled a new ballistic missile and threatened to hit US military bases. Revolutionary Guard General Salami warned that IRGC would open hell gates on invaders.
. The first isotopes of transplutonium elements, americium-241 and curium-242, were synthesized in 1944 by Glenn T. Seaborg, Ralph A. James and Albert Ghiorso. Curium-242 was obtained by bombarding plutonium-239 with 32-MeV α-particles:
Treatment of men with exogenous testosterone or other AAS results in suppression of gonadotropin secretion and gonadal testosterone production due to their antigonadotropic effects or activation of the AR in the pituitary gland, resulting in inhibition or abolition of spermatogenesis and fertility:
=== Complications of executions and cessation of supply of lethal injection drugs === By early 2014, a number of botched executions involving lethal injection and a rising shortage of suitable drugs had some U.S. states reconsidering lethal injection as a form of execution. Tennessee, which had previously offered inmates a choice between lethal injection and the electric chair, passed a law in May 2014 that gave the state the option to use the electric chair if lethal injection drugs were either unavailable or declared unconstitutional. At the same time, Wyoming and Utah were considering the use of execution by firing squad in addition to other existing execution methods. In 2016, Pfizer joined over 20 American and European pharmaceutical manufacturers that had previously blocked the sale of their drugs for use in lethal injections, effectively closing the open market for FDA-approved manufacturers for any potential lethal execution drug. In the execution of Carey Dean Moore on August 14, 2018, the State of Nebraska used a novel drug cocktail comprising diazepam, fentanyl, cisatracurium, and potassium chloride, over the strong objections of the German pharmaceutical company Fresenius Kabi. Potassium acetate had been incorrectly used in place of potassium chloride in Oklahoma in January 2015 for the execution of Charles Frederick Warner. In August 2017, the State of Florida first used the drug in the execution of Mark James Asay using a combination of etomidate, rocuronium bromide, and potassium acetate as part of a new protocol.
Sources: en.wikipedia.org
=== Speciality style ciders === Speciality style ciders are open to a lot more manipulation than modern or heritage style ciders. There is no restriction to apple varieties used and the list of speciality styles continues to expand. Listed on the USACM Cider Style Guide, speciality styles include: fruit, hopped, spiced, wood-aged, sour, and iced ciders. Fruit ciders have other fruit or juices added before or after fermentation, such as cherries, blueberries and cranberries. Hopped cider is fermented with added hops, common hop varieties being Cascade, Citra, Galaxy, and Mosaic. Spiced ciders have various spices added to the cider before, during, or after fermentation. Spices like cinnamon and ginger are popular to use in production. Wood-aged ciders are ciders that are either fermented or aged in various types of wood barrels, to aid in extraction of woody, earthy flavours. Sour ciders are high acid ciders that are produced with non-standard, non-Saccharomyces yeast and bacteria, which enhance acetic and lactic acid production, to reach a sour profile. Ice ciders can be made by using pre-pressed frozen juice or frozen whole apples. Whole apples either come frozen from the orchard, dependent on harvest date, or are stored in a freezer prior to pressing. When the pre-pressed juice or whole apples freeze, sugars are concentrated and mostly separated from the water. Whole apples are then pressed to extract the concentrated juice. For the pre-pressed juice the concentrated solution is drawn off while thawing occurs.
Due to its risks, the use of flutamide in cisgender and transgender women is now limited and discouraged. Flutamide and nilutamide have largely been superseded by bicalutamide in clinical practice, with bicalutamide accounting for almost 90% of nonsteroidal antiandrogen prescriptions in the United States by the mid-2000s. Bicalutamide is said to have excellent tolerability and safety relative to flutamide and nilutamide, as well as in comparison to cyproterone acetate. It has few to no side effects in women. Despite its greatly improved tolerability and safety profile however, bicalutamide does still have a small risk of elevated liver enzymes and association with rare cases of serious liver damage and lung disease. Nonsteroidal antiandrogens like bicalutamide may be a particularly favorable option for transgender women who wish to preserve sex drive, sexual function, and/or fertility, relative to antiandrogens that suppress testosterone levels and can greatly disrupt these functions such as cyproterone acetate and GnRH modulators. However, estrogens suppress testosterone levels and at high doses can markedly disrupt sex drive and function and fertility on their own. Moreover, disruption of gonadal function and fertility by estrogens may be permanent after extended exposure.
== Uses == Sea cucumbers are found in various colours; some are black, white, or grey, and striped with the golden sea cucumber (Stichopus horrens), which is commonly used for medical purposes. Users believe that a solution of sea cucumbers can heal cuts, skin eruptions, and ulcers, and claim that it has a beneficial effect on the immune system. The Stichopus variegatus are used in the production of traditional Gamat oil, ointment, and gel in both Indonesia and Malaysia. In the Malaysia's state of Kelantan, gamat oil is traditionally used by the local Kelantanese Malays to heal childbirth wounds, particularly those after vaginal delivery. The Stichopus variegatus extract also shows to be effective in reducing the gastrointestinal worm burden on stray cats. Another species Stichopus chloronotus is used for combating various types of ringworm infections, which are formulate into cream, ointment, lotion or solution. Teripang Emas (Stichopus herrmanni), a type of Indonesian gamat (Indonesian: teripang laut) is usually the dried, powdered bodies of sea cucumbers made into a lotion or other topical salve. It is sometimes mixed into clay and applied to the face as a mask treatment, or put in tea and consumed for stomach complaints. A research by Indonesian Dental Faculty on rats found the administration of teripang emas powder can reduce the risk of oral candidiasis with 0.09mg/kgBW dose of stichopus hermanii are able to reduce the thickness of the tongue epithelium in the group exposed to smoke and induced by candida albicans.
Fibroblast growth factors comprise the largest family of growth factor ligands at 23 members. The natural alternate splicing of four fibroblast growth factor receptor (FGFR) genes results in the production of over 48 different isoforms of FGFR. These isoforms vary in their ligand binding properties and kinase domains; however, all share a common extracellular region composed of three immunoglobulin (Ig)-like domains (D1-D3), and thus belong to the immunoglobulin superfamily. Interactions with FGFs occur via FGFR domains D2 and D3. Each receptor can be activated by several FGFs. In many cases, the FGFs themselves can also activate more than one receptor. This is not the case with FGF-7, however, which can activate only FGFR2b. A gene for a fifth FGFR protein, FGFR5, has also been identified. In contrast to FGFRs 1-4, it lacks a cytoplasmic tyrosine kinase domain, and one isoform, FGFR5γ, only contains the extracellular domains D1 and D2.
Sources: en.wikipedia.org
It is a chain of 28 amino acids, with an acetyl group attached to the first serine residue. The synthetic version replicates this sequence. Its molecular mass is about 3,108 daltons.
It is usually described as an immunomodulatory peptide rather than a classic hormone. It acts on immune cells through receptor pathways. No single endocrine organ target defines its function.
Several countries, including Italy and China, allow it for specific indications. The FDA has not approved it as a drug in the United States. Availability depends on local regulation.
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。