The short version of thymalfasin fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-02-01. Anything still debated is marked as such rather than presented as settled.
Thymosin beta-4 is a separate 43-residue peptide that binds actin and participates in cell migration; it shares no sequence similarity with thymosin alpha-1 despite the common family name. Other preparative materials, such as thymosin fraction 5 and thymopoietin, contain distinct mixtures or peptides. The shared thymosin label reflects the tissue of origin used in early purification, not a common structural core. Treating these molecules as interchangeable is a frequent source of confusion in laboratory reports and in popular summaries alike.
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.
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 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.
| Property | Value | Notes |
|---|---|---|
| Molecular mass | About 3.1 kDa | 28 residues, N-terminally acetylated |
| Appearance | White to off-white powder | Lyophilized solid |
| Solubility | Freely soluble in water | Also soluble in aqueous buffers |
| Storage temperature | 2 to 8 °C | Protect from light and moisture |
| Common synonyms | Thymalfasin; Tα1 | Same peptide sequence |
Clinical interest has centered on chronic viral hepatitis, on immune restoration in various conditions, and on use as an adjuvant intended to improve responses to vaccines. Trials have reported mixed results, and regulatory status differs sharply between countries; in some places it is a prescription product, while elsewhere it is sold without an approved therapeutic indication. Because published studies vary widely in design, population, and endpoints, comparisons across them are difficult and no single conclusion covers the whole literature.
Thymosin alpha 1 is a short peptide of 28 amino acid residues that derives from the amino terminal region of a larger precursor protein known as prothymosin alpha. The peptide carries an acetyl group on its first residue and contains no disulfide bonds or carbohydrate chains. Its sequence is highly conserved across mammalian species, which is one reason laboratories treat it as a molecule with a defined and reproducible structure rather than a variable tissue extract. The name follows an early naming convention for thymus-derived fractions and does not imply that the peptide acts as a hormone in the classical endocrine sense.
The peptide was described in the 1970s as a component of thymic extracts, and early research focused on restoring immune function in immunodeficiency states. A synthetic version entered clinical development in the 1980s and is approved as a drug in several countries for conditions such as chronic hepatitis B and certain immunodeficiencies. Approval status varies widely by jurisdiction, and in the United States it is not an approved therapeutic. Regulatory and clinical positions differ, so statements about efficacy should be tied to specific indications and studies.
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.
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.
Clinical research has examined the peptide in chronic hepatitis B and C, as a vaccine adjuvant, and in sepsis and oncology settings. Results across trials have been mixed, and several studies were small or conducted under differing protocols. Regulatory status varies by country, and the compound is not approved in every jurisdiction where it is studied. Evidence for any single indication should be read with attention to sample size and endpoint choice.
Thymosin alpha-1 is a 28-residue peptide first isolated from thymus tissue in the 1970s. It corresponds to the N-terminal portion of thymosin beta-4, from which it is cleaved in vivo. The peptide carries an acetyl group at its N-terminus, a modification that affects its charge and stability. Synthetic material produced by solid-phase peptide synthesis is chemically identical to the natural fragment and is the form used in research and clinical studies.
linker DNA 1. A short, synthetic DNA duplex containing the recognition sequence for a particular restriction enzyme. In molecular cloning, linkers are often deliberately included in recombinant molecules in order to make them easily modifiable by permitting cleavage and insertion of foreign sequences at precise locations. A segment of an engineered plasmid containing many such restriction sites is sometimes called a polylinker. 2. A section of chromosomal DNA connecting adjacent nucleosomes by binding to histone H1.
Kissinger summoned Dobrynin to the White House to accuse the Soviet Union of responsibility for the Easter Offensive, saying the North Vietnamese were fighting with Soviet-made weapons, and asked the Soviets to pressure the North Vietnamese to end the offensive.
perform both visual and digital oral health examinations. Provide removable oral appliances directly to a patient. Perform a complete visual/digital oral examination and evaluation of the patient. This includes obtaining a complete medical and dental history of the patient. Treat bruxism and sleep apnea by using night guard and anti snoring device. Treat teeth whitening by using custom bleach tray. prescribe radiography. prescribe oral prosthetics to dental technicians. Take impressions and make necessary jaw relation records Select the artificial teeth and designs the dentures. Fabricate and insert the dentures in the mouths of patients. Perform any adjunctive services such as repairs, relines or adjustments of removable dentures. Supervise auxiliary personnel in the performance of their delegated duties.
=== Performance-enhancing use === Because they promote lower heart rates and reduce tremors, beta blockers have been used in professional sports where high accuracy is required, including archery, shooting, golf and snooker. Beta blockers are banned in some sports by the International Olympic Committee. In the 2008 Summer Olympics, 50-metre pistol silver medalist and 10-metre air pistol bronze medalist Kim Jong-su tested positive for propranolol and was stripped of his medals. For similar reasons, beta blockers have also been used by surgeons. Classical musicians have commonly used beta blockers since the 1970s to reduce stage fright.
Sources: en.wikipedia.org
In 2016, DeepMind's WaveNet demonstrated that deep neural networks can generate raw audio waveforms. This enabled more realistic speech synthesis compared to earlier approaches. Subsequent systems such as Tacotron 2 demonstrated end-to-end neural text-to-speech generation.
The unit of account of the bitcoin system is the bitcoin. It is most commonly represented with the symbol ₿ designed in 2010 and the currency code BTC. However, the BTC code does not conform to ISO 4217 as BT is the country code of Bhutan, and ISO 4217 requires the first letter used in global commodities to be 'X'. XBT, a code that conforms to ISO 4217 though not officially part of it, is used by Bloomberg L.P. No uniform capitalization convention exists; some sources use Bitcoin, capitalized, to refer to the technology and network, and bitcoin, lowercase, for the unit of account. The Cambridge Advanced Learner's Dictionary and the Oxford Advanced Learner's Dictionary use the capitalized and lowercase variants without distinction. One bitcoin is divisible to eight decimal places. Units for smaller amounts of bitcoin are the millibitcoin (mBTC), equal to 1⁄1000 bitcoin, and the satoshi (sat), representing 1⁄100000000 (one hundred millionth) bitcoin, the smallest amount possible. 100,000 satoshis are one mBTC.
Christine Coates, Director, Coates Engineering (International Ltd). For services to Economic Development in North West England. Paulene Mary Collins. For services to Legal Education. Charles John Cooper, Principal Professional and Technology Officer, Ministry of Defence. Derek MacDonald Cooper. For services to Radio Broadcasting. Commodore George Richard Cooper, , Chief of Operations, Royal National Lifeboat Institution. For services to the RNLI. David Leonard Court. For services to Tourism in East Anglia. The Honourable Jurat John Alexander Gore Coutanche, lately Jurat, Royal Court of Jersey. For services to the community. Squadron Leader Robert Frederick Craig, Royal Air Force (Retd.), lately Grade 7, Ministry of Defence. Adrian Robert Currie, , Chief Fire Officer, Devon Fire and Rescue Service. For services to the Fire Service. Professor John Darby. For services to Community Relations. William Roch Davies, lately Director, Welsh Centre for International Affairs. For humanitarian services. Sally Dawn Ridley-Day. For political and public service. Peter Denley. For services to the Rehabilitation of Offenders. Brian Charles Dice. For services to British Waterways. James Dick, Director of Social Work Services, The Highland Council. For services to Social Work. Elizabeth Ann Dodsworth. For political service. Margaret Duddy. For political and public service. Andrew Nicholas Duff. For political service. Sister Mary Vincent Duggan. For services to Education. Helen Simpson Dunsmore. For services to Higher Education. Albert John Edwards, .
Spironolactone is not generally used in men for the treatment of androgen-dependent dermatological conditions because of its feminizing side effects, but it is effective for such indications in men similarly. As an example, spironolactone has been reported to reduce symptoms of acne in males. An additional example is the usefulness of spironolactone as an antiandrogen in transgender women and nonbinary individuals. Topical spironolactone is effective in the treatment of acne, as well. As a result, topical pharmaceutical formulations containing 2 or 5% spironolactone cream became available in Italy for the treatment of acne and hirsutism in the early 1990s. The products were discontinued in 2006 when the creams were added to the list of doping substances with a decree of the Ministry of Health that year.
=== 20 May === Eighteen Russian Shahed drones were launched at Kyiv. According to the Ukrainian Air Force all eighteen were shot down. Falling debris set fire to the roof of a residential complex in the Dniprovskyi District. This was the eleventh attack on the capital during the month of May. The Ukrainian Air Force also claimed to have destroyed two drones in the country's "east" and one in the "south" without further details. Yevgeny Prigozhin claimed on Telegram that his Wagner mercenaries had completely captured Bakhmut. This was denied by Ukraine, which nevertheless called the situation in the city "critical". The Russian Defence Ministry later confirmed the capture of the city, with President Putin sending his congratulations. Ukrainian President Volodymyr Zelenskyy met with Indian Prime Minister Narendra Modi at the G7 summit in Hiroshima for the first time since the Russian invasion of Ukraine. Pyotr Kucherenko, deputy science and higher education minister of the Russian Federation, suddenly fell ill on a plane returning from a business trip to Cuba. The aircraft landed at Mineralnye Vody however doctors were unable to save the minister's life. Kucherenko had reportedly called the war in Ukraine a "fascist invasion" in private. Exiled journalist Roman Super spoke to him "days before" his death, where Kucherenko expressed fears for his safety. The minister also had a preexisting heart condition.
Sources: en.wikipedia.org
excess exudate is delaying healing, infected exudate is present, there is contamination by a foreign body including dirt and bacteria devitalised tissue (slough and necrosis) is present. Wound cleansing is often undertaken as a ritual exercise rather than as an evidence-based activity. However, it has a role to play in all four domains of the WBP model. Wounds that are 'clean' and progressing do not require extraneous cleansing.
the so-called basic reproduction number (also called basic reproduction ratio). This ratio is derived as the expected number of new infections (these new infections are sometimes called secondary infections) from a single infection in a population where all subjects are susceptible. This idea can probably be more readily seen if we say that the typical time between contacts is
Significant flooding is reported in Ōkato, Egmont Village, New Zealand State Highway 3, and Eltham. New Plymouth's sewage system is also inundated. 4 July – Defence Minister Judith Collins announces the reactivation of No. 62 Squadron RNZAF as the New Zealand Defence Force's first dedicated space force unit. 10 July – Civil defence authorities declare a pre-emptive state of emergency in Nelson-Tasman in response to MetService's orange heavy rain warning for the region. 11 July: A 14-year-old boy is sentenced to three years and three months in prison for the killing of Enere McLaren-Taana. MetService issues a red heavy rain warning in parts of the Tasman District in response to heavy rain and flooding. 100 homes are evacuated due to flooding. MetService also issues orange heavy rain warnings in the Northland Region, Auckland Region, Waikato and Coromandel Peninsula. 12 July — MetService lifts weather warnings for much of the country except the Westland ranges. Hundreds of households in the Tasman District and Banks peninsula experience weather-related power cuts. 15 July — The Commerce Commission files civil proceedings against Foodstuffs North Island and its subsidiary Gilmours for alleged cartel conduct. 16 July — Education Minister Erica Stanford announces that the New Zealand Government will be ending open-plan class rooms in favour of single-cell classrooms. 18 July — The Gore District Council issues a directive not to drink tap water in Gore due to high nitrate levels.
== Cartridges == The stationary phase comes in the form of a packed syringe-shaped cartridge, a 96 well plate, a 47- or 90-mm flat disk, or a microextraction by packed sorbent (MEPS) device, a SPE method that uses a packed sorbent material in a liquid handling syringe. These can be mounted on its specific type of extraction manifold. The manifold allows multiple samples to be processed by holding several SPE media in place and allowing for an equal number of samples to pass through them simultaneously. In a standard cartridge SPE manifold up to 24 cartridges can be mounted in parallel, while a typical disk SPE manifold can accommodate 6 disks. Most SPE manifolds are equipped with a vacuum port, where vacuum can be applied to speed up the extraction process by pulling the liquid sample through the stationary phase. The analytes are collected in sample tubes inside or below the manifold after they pass through the stationary phase. Solid phase extraction cartridges and disks can be purchased with several stationary phases, each of which separates analytes depending on different chemical properties. The basis of most stationary phases is silica that has been bonded to a specific functional group. Some of these functional groups include hydrophobic alkyl or aryl chains of variable length (for reversed phase), quaternary ammonium or amino groups (for anion exchange), and aliphatic sulfonic acid or carboxyl groups (for cation exchange).
Constancy testing is the verification of reference values as part of quality assurance in x-ray diagnostics, nuclear medicine diagnostics, and radiotherapy. National regulations specify which parameters are to be tested, which limits are to be observed, which test methods are to be used, and which test samples are to be used. In Germany, the Radiation Protection in Medicine Directive and the relevant DIN 6855 standard in nuclear medicine require regular (in some cases daily) constancy testing. Test sources are used to check the response of probe measuring stations as well as in vivo and in vitro measuring stations. Before starting the tests, the background count rate and the setting of the energy window must be checked every working day, and the settings and the yield with reproducible geometry must be checked at least once a week with a suitable test source, e.g. 137Caesium (DIN 6855-1). The reference values for the constancy test are determined during the acceptance test. Compact test specimens for medical X-ray images were not created until 1982. Prior to this, the patient himself often served as the object for producing X-ray test images. Prototypes of such an X-ray phantom with integrated structures were developed by Thomas Bronder at the Physikalisch-Technische Bundesanstalt. A water phantom is a Plexiglas container filled with distilled water that is used as a substitute for living tissue to test electron linear accelerators used in radiation therapy.
Sources: en.wikipedia.org
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.
The name traces back to thymosin fraction 5, a crude thymus extract examined in the 1970s. Individual peptides in that mixture were labeled with Greek letters, and alpha-1 was one of them. The international nonproprietary name thymalfasin was assigned later.
No. Thymosin beta-4 contains 43 residues and binds actin, while thymosin alpha-1 contains 28 residues and acts on immune cells. The two sit in a historical naming group but share no sequence similarity, and they are not substitutes for one another.
Trials differ in patient population, dose schedule, background treatment, and the endpoints used to judge success. Many are small and single-center, so random variation can dominate the reported effects.