Everything below concerns immunomodulator. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2025-08-13. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
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.
Thymosin alpha-1 is a synthetic 28-amino-acid peptide whose sequence was first identified in extracts of bovine thymus tissue during the 1970s. The chain carries an acetyl group on its N-terminal serine. Its acidic residue content is high, which produces strong water solubility and an isoelectric point well below neutrality. Material supplied for laboratory and clinical use is manufactured by solid-phase peptide synthesis rather than purified from animal tissue. Different salt forms, such as the acetate, alter the counter-ion content without changing the peptide backbone.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Acetylated peptide | N-terminal acetyl group blocks aminopeptidase attack |
| Residue count | 28 amino acids | Matches the N-terminus of prothymosin alpha |
| Molecular mass | About 3,108 Da | Value for the free, unmodified peptide |
| Isoelectric point | Approximately 4.2 | Acidic; net negative charge at neutral pH |
| Encoding gene | PTMA | Human gene for the precursor protein |
Stability depends on temperature, pH, and the number of freeze-thaw events the sample has experienced. Freeze-dried material is commonly held at -20 °C or colder, while reconstituted liquid is kept cold and used within a short window. Extreme pH and prolonged light exposure can promote deamidation, oxidation, or aggregation, particularly at asparagine and methionine positions. Adsorption to container walls can lower the measured concentration of a dilute solution even when the peptide molecules themselves remain intact.
Identity and purity are usually assessed by reversed-phase high-performance liquid chromatography, which separates the target peptide from truncated or chemically modified byproducts. Mass spectrometry confirms the expected molecular mass and can indicate acetylation state or sequence errors. Amino acid analysis and peptide mapping supply complementary sequence-level information, while endotoxin testing is relevant for preparations intended for cell or animal work. Purity figures reported by suppliers refer to the method used and are not directly comparable across laboratories unless conditions are stated.
Thymosin alpha 1 is approved as a medicine in several countries, including Italy and China, for indications such as chronic hepatitis B and as an immune adjuvant. It is not approved by the United States Food and Drug Administration as a therapeutic product. In research settings the peptide appears in studies of sepsis, vaccine response, and oncology support, often with mixed or inconclusive results. The evidence base is uneven, and reviews note that many trials were small. Regulatory status therefore differs widely between jurisdictions.
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.
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.
=== Research supporting the development, safety and benefits of GLP-1 therapeutics === Drucker joined the Samuel Lunenfeld Research Institute at Mount Sinai Hospital in Toronto in 2006. In 2008 he led studies aimed at the development and testing of the first long-acting, once-weekly version of the diabetes medication exenatide. He later studied the long-term effects of related weight-loss medicines on bowel health. Drucker has also led the identification of the cardioprotective mechanisms of GLP-1 action. Notably, in 2009 he demonstrated in mice that these effects were not dependent on glucose lowering or weight loss – findings confirmed over a decade later in cardiovascular outcome trials. His discoveries predicted the safety of GLP-1 receptor agonists for their expanding applications to treat obesity and other chronic conditions. Most recently, Drucker has identified multiple mechanisms linking GLP-1 to the reduction of inflammation. Drucker holds the Banting and Best Diabetes Centre-Novo Nordisk Chair in Incretin Biology. His many national and international recognitions include the 2023 Wolf Prize in Medicine, awarded for "pioneering work in elucidating the mechanisms and therapeutic potential of enteroendocrine hormones," as well as the Warren Alpert Foundation Prize and the Canada Gairdner International Award, among numerous others. Drucker was elected a Royal Society Fellow in 2015, a National Academy of Sciences International Member in 2021and a National Academy of Medicine International Member in 2023.
Historically, many Chinese chefs tried not to use milk, because of the high rate of lactose intolerance among the Chinese population. However, today, dairy products are increasingly used in Chinese cuisine, such as the "double skin milk" dessert in Guangdong Province, yoghurt in Qinghai and Xinjiang, and milk candies such as White Rabbit. China has a wide variety of dairy desserts that are very popular.
1 On 3 March 2001, Minister for Planning and Infrastructure Alannah MacTiernan, whose portfolio included road safety, lost her licence after being booked for driving at 98 km/h in a 60 km/h zone near Pinjarra. On 9 March 2001, Premier Gallop appointed Minister for Police Michelle Roberts as Minister assisting the Minister for Planning and Infrastructure with respect to Road Safety, meaning that Roberts would chair the Ministerial Council on Road Safety and be responsible for three Acts of Parliament. 2 The parliamentary secretaries were not appointed at the same time as the rest of the Ministry. A separate announcement was made on 23 March 2001 confirming their appointments. 3 On 27 June 2003, a Cabinet reshuffle removed Health from Bob Kucera and Housing and Works from Tom Stephens, reallocating the portfolios to Jim McGinty and Nick Griffiths respectively. The membership of the Cabinet remained unchanged. 4 On 16 September 2004, Tom Stephens MLC resigned from the Ministry and from Parliament in order to contest the seat of Kalgoorlie at the October 2004 federal election. Kim Chance adopted the portfolios before they were reassigned to Ljiljanna Ravlich, who was promoted from parliamentary secretary to Minister on 21 September 2004.
Effects of ROS on cell metabolism are well documented in a variety of species. These include not only roles in apoptosis (programmed cell death) but also positive effects such as the induction of host defence genes and mobilization of ion transporters. This implicates them in control of cellular function. In particular, platelets involved in wound repair and blood homeostasis release ROS to recruit additional platelets to sites of injury. These also provide a link to the adaptive immune system via the recruitment of leukocytes. Reactive oxygen species are implicated in cellular activity to a variety of inflammatory responses including cardiovascular disease. They may also be involved in hearing impairment via cochlear damage induced by elevated sound levels, in ototoxicity of drugs such as cisplatin, and in congenital deafness in both animals and humans. ROS are also implicated in mediation of apoptosis or programmed cell death and ischaemic injury. Specific examples include stroke and heart attack. In general, the harmful effects of reactive oxygen species on the cell are the damage of DNA or RNA, oxidation of polyunsaturated fatty acids in lipids (lipid peroxidation), oxidation of amino acids in proteins, and oxidative deactivation of specific enzymes by oxidation co-factors. They play a role in causing dangerous genetic mutations.
Powder cocaine (cocaine hydrochloride) must be heated to a high temperature to be smoked (about 197 °C), and considerable decomposition/burning occurs at these high temperatures. This effectively destroys some of the cocaine and yields a sharp, acrid, and foul-tasting smoke. Cocaine base/crack can be smoked because it vaporizes with little or no decomposition at 98 °C (208 °F).
Sources: en.wikipedia.org
Interferon type III IFN type III signals through the interferon-lambda receptor (IFNLR) consisting of IL10R2 (also called CRF2-4) and IFNLR1 (also called CRF2-12). In most tetrapods (including humans), the only group is IFN-λ. Although discovered more recently than type I and type II IFNs, recent information demonstrates the importance of Type III IFNs in some types of virus or fungal infections. In general, type I and II interferons are responsible for regulating and activating the immune response. Expression of type I and III IFNs can be induced in virtually all cell types upon recognition of viral components, especially nucleic acids, by cytoplasmic and endosomal receptors, whereas type II interferon is induced by cytokines such as IL-12, and its expression is restricted to immune cells such as T cells and NK cells.
Caffeine can produce a mild form of drug dependence – associated with withdrawal symptoms such as sleepiness, headache, and irritability – when an individual stops using caffeine after repeated daily intake. Tolerance develops to autonomic effects (blood pressure, heart rate, nervousness) and to alerting/vigilance benefits with regular use. Chronic exposure upregulates adenosine receptors, raising the effort threshold for allocating attention—even to mundane or previously enjoyable tasks—because habitual users operate from a lowered arousal baseline. Caffeine is classified by the US Food and Drug Administration (FDA) as generally recognized as safe. Lethal doses, over 10 grams per day for an adult, greatly exceed the typical dose of under 500 milligrams per day. The European Food Safety Authority reported that up to 400 mg of caffeine per day (around 5.7 mg/kg of body mass per day) does not raise safety concerns for non-pregnant adults, while intakes up to 200 mg per day for pregnant and lactating women do not raise safety concerns for the fetus or the breast-fed infants. A 6 ounce cup of coffee typically contains 50–175 mg of caffeine, depending on what "bean" (seed) is used (and how much), how it is roasted, and how it is prepared (e.g., drip, percolation, or espresso). Thus roughly 50–100 ordinary cups of coffee would be required to reach a lethal dose. However, pure powdered caffeine, which is available as a dietary supplement, can be lethal in tablespoon-sized amounts.
The traditional kava beverage is prepared through aqueous extraction of the fresh or dried roots of the Piper methysticum plant. When using fresh roots, the outer layer is typically peeled before the root is either chewed or mechanically ground into a fine, fibrous pulp, which is then mixed with water. For dried roots, the material is finely ground, placed in a porous cloth, and infused in water. The resulting brew is usually consumed immediately after preparation, often from a communal bowl. Traditional and recreational preparation of kava beverage involves macerating, grinding, or pounding fresh or dried rhizome/root (1.0–1.5 g) and mixing it with water or coconut milk (100–150 mL) to form an emulsion, which is then agitated and strained through cloth or bark filters into a communal bowl. The resulting drink is grey and slightly pungent, with fresh rhizome/root producing a stronger and more complex beverage than dried forms due to the retention of volatile compounds. In Vanuatu, fresh root is commonly used, while in non-Pacific countries, kava is typically prepared from dried root powder soaked in water (about one tablespoon per cup) for 30 minutes before straining. On Pohnpei in Micronesia, preparation also includes mixing the kava root with the fibrous bark of Hibiscus tiliaceus before pressing.
=== Vietnam === Vietnam is among the most fragile of South East Asian countries due to low energy security, relying on countries such as China and Thailand for petroleum imports. Vietnam is among the worst hit in South East Asia, with only Laos and Cambodia facing a worse situation. The economic impact of the fuel crisis is expected to slow Vietnam's economic growth. The fuel crisis has had a widespread impact on Vietnamese society as people change habits and find new ways of production. Gig workers were especially hard hit by the doubling price of fuel. The government of Vietnam has abolished some fuel levies until mid-April, but fuel prices are still way above what they were before the war. Increased shipping costs for local businesses have hurt them economically, with customers dropping off.
Sources: en.wikipedia.org
Other inborn errors of metabolism include riboflavin-responsive multiple acyl-CoA dehydrogenase deficiency, also known as a subset of glutaric acidemia type 2, and the C677T variant of the methylenetetrahydrofolate reductase enzyme, which in adults has been associated with risk of high blood pressure.
Crosslinking of peptidyl moieties of adjacent glycan strands is a two-step reaction. The first step involves the cleavage of the D-alanyl-D-alanine bond of a peptide unit precursor acting as carbonyl donor, the release of the carboxyl-terminal D-alanine, and the formation of the acyl-enzyme. The second step involves the breakdown of the acyl-enzyme intermediate and the formation of a new peptide bond between the carbonyl of the D-alanyl moiety and the amino group of another peptide unit. Most discussion of DD-peptidase mechanisms revolves around the catalysts of proton transfer. During formation of the acyl-enzyme intermediate, a proton must be removed from the active site serine hydroxyl group and one must be added to the amine leaving group. A similar proton movement must be facilitated in deacylation. The identity of the general acid and base catalysts involved in these proton transfers has not yet been elucidated. However, the catalytic triad tyrosine, lysine, and serine, as well as serine, lysine, serine have been proposed.
== External links == Gas+chromatography-mass+spectrometry at the U.S. National Library of Medicine Medical Subject Headings (MeSH) Golm Metabolome Database, a mass spectral reference database of plant metabolites
== Overview == Fructilactobacillus sanfranciscensis was first known to be isolated in 1971 by Kline and Sugihara. As lactic acid bacteria, the strains are Gram-positive, slender, rod-shaped, nonsporulating, and non-motile. They are also obligately heterofermentative, meaning that they can convert hexose sugars into not just lactic acid, but also ethanol, CO2, and/or acetic acid. This heterofermentative ability is key for this species' role in creating the unique flavor of sourdough bread. Sourdough starters are leavened by a mixture of yeast and lactobacilli in a ratio of about 1:100. Common yeast species found in combination with F. sanfranciscensis are Kazachstania humilis, Saccharomyces cerevisiae, and Wickerhamomyces anomalus. This yeast cannot metabolize the maltose found in the dough, while the Fructilactobacillus requires maltose. They therefore act without conflict for substrate, with lactobacilli utilizing maltose and the yeast utilizing the other sugars, including the glucose produced by the F. sanfranciscensis.
A descriptor which is applied to any substance or process which is being investigated for clinical use but either has not commenced, or has not completed, clinical trials. Examples: candidate vaccine, candidate formulation. Case report
Sources: en.wikipedia.org
Thymosin fraction 5 is a mixture of many peptides obtained from thymus tissue, while thymosin alpha 1 is a single defined 28-residue molecule. The two names appear together in older literature because the purified peptide was first obtained from that mixture.
The precursor, prothymosin alpha, is encoded by the PTMA gene in humans. The 28-residue peptide corresponds to the N-terminal segment released from that larger protein.
It is produced as a fragment of prothymosin alpha and is present in many tissues. Circulating concentrations are low, which makes routine measurement difficult.
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.