A practical reference on immunomodulator: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-08-01 and is reviewed periodically as new material appears.
Whether the free 28-residue peptide circulates in human tissue remains debated. The best-documented human source is prothymosin alpha, a larger acidic protein that carries the sequence at its N-terminus. Reports of measurable peptide levels in serum and lymphoid tissue exist, yet some of that signal may come from cross-reacting fragments or from the parent protein. Most reviews therefore treat prothymosin alpha as the established human molecule and describe independent circulation of the small peptide as an unresolved question.
Immunological studies connect the peptide to multiple parts of the immune response. It has been reported to engage Toll-like receptor signaling, to promote dendritic cell maturation, and to influence the balance of T helper cell subsets. Changes in natural killer cell activity and in cytokine release appear in cell culture and animal models. These observations describe broad immunomodulatory behavior rather than a single defined receptor target, and the primary molecular interaction has not been settled.
胸腺素α1（thymosin alpha 1，Tα1）是一种由28个氨基酸组成的酸性肽，N端被乙酰化，分子量约为3108道尔顿。该肽最早从牛胸腺组织提取物中分离，属于胸腺素组分5的一个成分。其序列在不同哺乳动物中高度保守，提示其具有基本的生物学功能。名称中的“α1”指其在电泳中的迁移位置，并非表示亚型编号。它既存在于胸腺，也存在于脾脏和淋巴结等免疫组织。
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。
| Property | Value | Notes |
|---|---|---|
| Amino acid length | 28 residues | Single chain with an acetylated N-terminus |
| Molecular mass | Approximately 3,108 Da | Small shifts occur with counter-ion and water content |
| Isoelectric point | Around 3.5 | Low value follows from the many acidic residues |
| Parent molecule | N-terminal region of prothymosin alpha | Free circulating form in humans is not firmly established |
| Common synonyms | Thymalfasin; T alpha 1 | Older literature also uses the full spelled-out form |
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.
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 is a short peptide first isolated from bovine thymus tissue in the early 1970s during fractionation work aimed at identifying factors that influence T cell development. It belongs to a family of acidic thymic peptides, and the original preparations contained several components that were later separated by chromatography. The compound is now produced synthetically rather than extracted from tissue, which removes batch variability tied to animal sourcing. Researchers describe it as an immunomodulatory peptide because laboratory studies show effects on several cell types of the innate and adaptive immune systems.
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 military base was now ostensibly renamed for Roland L. Bragg, a previously obscure soldier who served in World War II. In a meeting before the Ukraine Defense Contact Group at NATO headquarters, he opposed NATO membership for Ukraine and said that returning Ukraine's borders prior to the annexation of Crimea by Russia was "unrealistic". The Department of Defense invited Jack Posobiec, an alt-right political activist to accompany Hegseth, according to The Washington Post. Hegseth moderated his comments the following day, stating that it would be possible for Ukraine to join NATO given Trump's discretion. In February 2025, Hegseth ordered officials within the Department of Defense to reduce funding on most initiatives and began a purge from within the department, firing three top judge advocate generals and Lisa Franchetti, the chief of naval operations. Hegseth stated that "we want lawyers who give sound constitutional advice" rather than "roadblocks to anything". In March, he ordered US Cyber Command to halt offensive operations against Russia, in an apparent effort to encourage Russian president Vladimir Putin to negotiate an end to the Russo-Ukrainian War.
Despite the absence of brown recluses from the Western U.S., physicians in the region commonly diagnose "brown recluse bites", leading to the popular misconception that the spiders inhabit those areas. Over the last century, spiders have occasionally been intercepted in locations where they have no known established populations; these spiders may be transported fairly easily, though the lack of established populations well outside the natural range also indicates that such movement has not led to the colonization of new areas, after decades of opportunities. Note that the occurrence of brown recluses in a single building (such as a warehouse) outside of the native range is not considered as successful colonization; such single-building populations can occur (e.g., in several such cases in Florida), but do not spread, and can be easily eradicated. The spider has also received numerous sensationalized media reports of bites occurring where these spiders are absent (and no specimens were found), such as a 2014 report from Thailand, where a man was claimed to have died from a brown recluse bite. Many misidentifications and erroneous geographic records stem from the similarity between L. reclusa and a related introduced species, the Mediterranean recluse (Loxosceles rufescens), which is found worldwide, including numerous sightings throughout the United States; the two species are superficially almost indistinguishable, and misidentifications are common, making it difficult to distinguish which reports of recluses refer to which species.
=== Plastics pollution === Named as one of the top five plastic polluters in Canada in 2018 and 2019; in 2019, Tim Hortons accounted for about 11% of branded plastic waste collected by Greenpeace Canada from rivers and beaches. In late 2018 and early 2019, Tim Hortons was subject to controversy over their usage of plastic cups. An online Change.org petition asking the company to switch from plastic cups to "a fully recyclable and compostable alternative" gained over 171,000 signatures. The cups were not compostable, due to their plastic lining, and are often very difficult to recycle. As of February 2019, Tim Hortons had not responded to the petition's requests. In some BC communities, recycling services accept Tim Hortons coffee cups. The City of Toronto announced in 2024 that it is piloting recycling coffee cups. In early 2020, it gave away reusable cups for its "Roll Up the Rim to Win" promotion to eliminate single-use plastic in its establishments. The effort was criticized as greenwashing through a limited-time promotion.
Sources: en.wikipedia.org
=== By other animals === Humans are not always the only species to bury their dead. Chimpanzees and elephants are known to throw leaves and branches over fallen members of their family groups. In one instance, an elephant which trampled a human mother and child buried its victims under a pile of leaves before disappearing into the bushes. In 2013, a viral video caught a dog burying a dead puppy by pushing sand with its own nose. It is presumed, however, that since dogs retain the instinct to bury food, this is what is being depicted in the video. In social insects, ants and termites also bury their dead nestmates depending on the properties of the corpse and the social context. Laboratory rats had been observed using bedding material to bury dead conspecifics placed in their test chamber.
There are several methods in which blood sugar is measured including with a glucose meter, continuous glucose monitor (CGM), and routine bloodwork. The glucose meter, also known as a glucometer, is a common and simple method using a portable electronic device to measure glucose levels either at home or in a clinical setting. The glucose meter works by taking a small sample of blood using a lancet (a sterile pointed needle) to prick a fingertip, usually the index or middle finger (Image 1). The blood droplet is usually collected at the bottom of a test strip, while the other end is inserted in the glucose meter. The drop of blood is drawn into the meter and can directly measure the glucose in the sample. The units of blood sugar level from a glucose meter, will result in either mg/dL (milligrams per deciliter in the US) or mmol/L (millimoles per liter in Canada and Eastern Europe) of blood. Proper user technique and environmental conditions are important in obtaining reliable readings and accurate glucose measurements. Control of diabetes may be improved using home glucose meters to regularly measure glucose levels as this method provides rapid results allowing individuals to make timely decisions regarding diet, exercise, and medication. Continuous glucose monitors (CGMs) are another method to measure blood glucose levels and is widely used among individuals with diabetes. A continuous glucose monitor is a device that sits on the surface of the skin (usually on the arm or abdomen) and measures the amount of glucose between the cells with a probe.
Neuropeptide SF (NPSF) (RFRP-1) – agonist of the NPFF1 and NPFF2 receptors (EC50 = 29 nM and 0.0011 nM, respectively) RFRP-2 – does not bind to either of the NPFF receptors; no known biological activity Neuropeptide VF (NPVF) (RFRP-3) – agonist of the NPFF1 receptor (IC50 = 0.7 nM) NPSF and NPVF, originally referred to as the RFamide-related peptides RFRP-1 and RFRP-3, respectively, are the mammalian homologs of the avian neuropeptide gonadotropin-inhibitory hormone (GnIH). The mammalian NPVF and avian GnIH genes, along with their aforementioned peptide products, were discovered concurrently in 2000. Similarly to the avian GnIH neuropeptide, NPSF and NPVF have been found to potently inhibit gonadotropin secretion. Moreover, a potent and selective antagonist of the NPFF receptors, RF9, has been reported to possess "very strong" gonadotropin-releasing effects in vivo in male and female mice.
Sources: en.wikipedia.org
== Production == The Booth's beers are produced at four locations (The Booth's Pangyo Brewery, The Booth's Eureka Brewery, Brew Hub, and De Proefbrouwerij), on three continents (Asia, North America, and Europe). Production at Brew Hub has helped quintuple The Booth's production of their flagship beers, Kukmin IPA and Kieuk IPA. Its beers include Taedonggang Pale Ale: International Pale Ale, made in collaboration with Danish gypsy-brewery Mikkeller, and Kieuk Session IPA: Session India Pale Ale, made in collaboration with Kiha and the Faces, an indie music band from Korea. In October 2015, they acquired a brewing facility in Eureka, California, formerly owned by Lost Coast Brewery. In December 2020, the Eureka facility was shut down.
=== Nutrients === Amino acids are the basic components of proteins. Protein requirements are species-specific. Carnivorous fish need a greater percentage of proteins than herbivorous. An example of an aquatic diet that is a good source of amino acid is a crumbled hard boiled egg offered to small fry. Large amounts of DL-Methionine enhance the headgrowth of the Lionhead goldfish. Fats that are broken down into fatty acids are the main source of energy in fish especially for the heart and skeletal muscles. Fats also assist in vitamin absorption. Vitamins A, D, E and K are fat-soluble or can only be digested, absorbed, and transported in conjunction with fats. Carbohydrates are molecular substances that include sugars, starches, gums and celluloses. Most of the carbohydrates that are incorporated into aquatic diets are of plant origin and are sources of the enzyme amylase. Carbohydrates, however, are not a superior energy source for fish over protein or fat but digestible carbohydrates do spare protein for tissue building. Unlike in mammals, glycogen is not a significant storage depot of energy in fish.
Border control is generally the responsibility of specialised government organisations which oversee various aspects of their jurisdiction's border control policies, including customs, immigration policy, border guard, biosecurity measures. Official designations, division of responsibilities, and command structures of these organisations vary considerably, and some countries split border control functions across multiple agencies.
Sources: en.wikipedia.org
It is usually described as an immunomodulatory peptide rather than a classic circulating hormone. No endocrine gland is known to release it as a primary secretory product, and its measured presence in blood is not firmly established.
Prothymosin alpha is a much larger acidic protein, roughly 111 to 113 residues long, and the thymosin alpha-1 sequence matches its N-terminal region. The small peptide is therefore best understood as a fragment of that parent protein rather than a separate gene product.
Trials and clinical reports have examined chronic hepatitis B and C, use as a vaccine adjuvant, and supportive treatment in some immunodeficiency and oncology settings. Results vary by indication, and regulatory approval differs between countries.
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。