This is a working overview of immune modulation, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2025-09-13 and is reviewed periodically as new material appears.
The compound has been investigated as an adjunct in chronic viral hepatitis and as a vaccine adjuvant, with results that vary by study design and population. Regulators in some countries have approved a synthetic form for specific indications, while other agencies have not. Whether the peptide produces consistent clinical benefit across diverse patient groups is still an open question, and many trials have been small. Its status is therefore best described as investigational in many contexts and established only narrowly.
The name itself causes confusion, because several unrelated thymic peptides share the thymosin label. Thymosin beta-4, for example, is a different molecule with different functions. Naming conventions in the literature also mix descriptive research terms with assigned nonproprietary names, so a reader should confirm which entity a given paper addresses. Clarifying that point is usually the first step in interpreting any claim about this peptide.
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.
| Property | Value | Notes |
|---|---|---|
| Residue count | 28 amino acids | Acetyl group on the first residue |
| Approximate molecular mass | 3108 daltons | Calculated from the consensus sequence |
| Origin | Cleavage product of prothymosin alpha | Not encoded as a separate gene product |
| Primary research focus | Immune modulation | Studied in viral hepatitis and as a vaccine adjuvant |
| Common synonyms | Thymalfasin, Tα1, thymosin alpha 1 | Thymalfasin is the assigned nonproprietary name |
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.
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.
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.
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.
Like most short peptides, thymosin alpha-1 is susceptible to hydrolysis under strongly acidic or basic conditions and to oxidation when exposed to air over long periods. The acetylated amino terminus blocks one common degradation route, which contributes to the molecule's relative robustness in solution. Lyophilized material generally retains potency for extended periods when kept cold and dry. Once reconstituted, aqueous solutions are less stable and are typically used within a defined window rather than held indefinitely at ambient temperature.
During the process of creating new queens, the workers construct special queen cells. The larvae in these cells are fed with copious amounts of royal jelly. This type of feeding in part triggers the development of queen morphology, including the fully developed ovaries needed to lay eggs. Note however that some newer research shows it is not solely the presence of royal jelly that develops the queen but rather the absence of certain other nutrients fed to worker bees. Royal jelly is sometimes used in alternative medicine under the category apitherapy. It is often sold as a dietary supplement for humans, but the European Food Safety Authority concluded in 2011 that evidence does not support the claim that consuming royal jelly offers health benefits to humans. In the United States, the Food and Drug Administration has taken legal action against companies that have marketed royal jelly products using unfounded claims of health benefits.
==== Lactic acid ==== It was once believed that lactic acid build-up was the cause of muscle fatigue. The assumption was lactic acid had a "pickling" effect on muscles, inhibiting their ability to contract. Though the impact of lactic acid on performance is now uncertain, it may assist or hinder muscle fatigue. Produced as a by-product of fermentation, lactic acid can increase intracellular acidity of muscles. This can lower the sensitivity of contractile apparatus to Ca2+ but also has the effect of increasing cytoplasmic Ca2+ concentration through an inhibition of the chemical pump that actively transports calcium out of the cell. This counters inhibiting effects of potassium on muscular action potentials. Lactic acid also has a negating effect on the chloride ions in the muscles, reducing their inhibition of contraction and leaving potassium ions as the only restricting influence on muscle contractions, though the effects of potassium are much less than if there were no lactic acid to remove the chloride ions. Ultimately, it is uncertain if lactic acid reduces fatigue through increased intracellular calcium or increases fatigue through reduced sensitivity of contractile proteins to Ca2+. Lactic acid is now used as a measure of endurance training effectiveness and VO2 max.
Sequence variation of Bemisia tabaci Chemosensory protein 2 in cryptic species B and Q: new DNA markers for whitefly recognition. Gene 2016a; 576: 284-291. 26. Zhu J, Wang G, Pelosi P. Plant transcriptomes reveal hidden guests. Biochem Biophys Res Commun. 2016; 474: 497-502. 27. Perkin LC, Friesen KS, Flinn PW, Oppert B. Venom gland components of the ectoparasitoid wasp, Anisopteromalus calandrae. J. Venom Res. 2015; 6: 19-37. 28. Celorio-Mancera MdP, Sundmalm SM, Vogel H, Rutishauser D, Ytterberg AJ, Zubarv RA et al. Chemosensory proteins, major salivary factors in caterpillar mandibular glands. Insect Biochem Mol Biol. 2012; 42: 796-805. 29. González-Caballero N, Valenzuela JG, Ribeiro JMC, Cuervo P, Brazil RP. Transcriptome exploration of the sex pheromone gland of Lutzomyia longipalpis (Diptera: Psychodidae: Phlebotominae). Parasit Vect. 2013; 6: 56. 30. Liu YL, Guo H, Huang LQ, Pelosi P, Wang CZ. Unique function of a chemosensory protein in the proboscis of two Helicoverpa species. J Exp Biol. 2014; 217: 1821-1826. 31. Zhu J, Iovinella I, Dani FR, Liu YL, Huang LQ, Liu Y, et al. Conserved chemosensory proteins in the proboscis and eyes of Lepidoptera. Int J Biol Sci. 2016; 12: 1394-1404. 32. Xuan N, Guo X, Xie HY, Lou QN, Bo LX, Liu GX, et al. Increased expression of CSP and CYP genes in adult silkworm females exposed to avermectins. Insect Sci. 2015; 22: 203-219. 33. Sabatier L, Jouanguy E, Dostert C, Zachary D, Dimarcq JL, Bulet P, et al.
The kidneys have an important role in maintaining health. When the person is healthy, the kidneys maintain the body's internal equilibrium of water and minerals (sodium, potassium, chloride, calcium, phosphorus, magnesium, sulphate). The acidic metabolism end-products that the body cannot get rid of via respiration are also excreted through the kidneys. The kidneys also function as a part of the endocrine system, producing erythropoietin, calcitriol and renin. Erythropoietin is involved in the production of red blood cells and calcitriol plays a role in bone formation. Dialysis is an imperfect treatment to replace kidney function because it does not correct the compromised endocrine functions of the kidney. Dialysis treatments replace some of these functions through diffusion (waste removal) and ultrafiltration (fluid removal). Dialysis uses highly purified (also known as "ultrapure") water.
(2026) report evidence from the study of carbon and oxygen stable isotope compositions of mammal fossils from the Pinturas Formation (Argentina) indicative of presence of a diverse range of habitats in Patagonia during the Miocene, and interpret the diversity of the primate assemblage from the studied formation as likely linked to habitat diversity. Cooke et al. (2026) report the first discovery of mandibular remains of Stirtonia victoriae from the La Victoria Formation (Colombia), and interpret their anatomy as indicative of leaf-eating adaptations of the studied monkey. Urciuoli et al. (2026) determine the phylogenetic relationships of early members of Catarrhini on the basis of the study of the semicircular canal and vestibule shape in Saadanius, Pliobates, Ekembo and Victoriapithecus, interpret Saadanius as most likely to be a stem catarrhine that evolved ossified tubular ectotympanic independently from crown catarrhines, and interpret pliopithecoids as most likely to be stem catarrhines closer to the crown group than Saadanius. Arias-Martorell et al. (2026) report evidence of similarities of shape of the radial head of Pliobates cataloniae and extant apes, and interpret Pliobates as better adapted to climbing than to behaviors involving forelimb-dominated suspension. Arias-Martorell et al. (2026) compare the shape of the distal part of the humerus of Pliobates cataloniae and other extinct and extant simians, and interpret Pliobates as unlikely to perform acrobatic suspensory behaviors seen in extant gibbons.
Sources: en.wikipedia.org
== Botany == In botany, the term is most common in its adjectival forms, where it is used in binomial names to refer to species that are distinguished by hollow or tubular structures. Monarda fistulosa, for example, has tubular flowers; Eutrochium fistulosum has a tubular stem; Allium fistulosum has hollow or tubular leaves, and Acacia seyal subsp. fistula is the subspecies with hollow spines.
Miroslav Aleksić became mayor of Trstenik in 2012 as a member of the United Regions of Serbia (Ujedinjeni regioni Srbije, URS). The URS largely became dormant after the 2014 Serbian parliamentary election, and Aleksić left the party later in the year and became acting leader of a breakaway group initially called the People's Party of Serbia (Narodna stranka Srbije, NSS). The group was formally constituted as the People's Movement of Serbia in January 2015, and Aleksić was chosen as its leader in February. The party contested the 2016 parliamentary election as part of the Alliance for a Better Serbia list led by Boris Tadić, Čedomir Jovanović and Nenad Čanak. Aleksić received the eighth position on the electoral list and was elected when the alliance won thirteen mandates. The People's Movement of Serbia operated in a parliamentary alliance with Tadić's Social Democratic Party, which also contested the 2016 elections in the Alliance for a Better Serbia. Aleksić served as the parliamentary group's deputy leader. Both the alliance with the Social Democratic Party and Aleksić's deputy leadership of the parliamentary group continued after the party was restructured as the People's Party.
==== Spanish Dual Language Program ==== The Spanish Dual Language Program gives equal emphasis to English and non-English language speakers. Students learn Spanish and English through content based instruction in selected core subjects with a cross cultural understanding for both native and non-native speakers. Students read, write, listen and speak in both languages, becoming bilingual, biliterate and bicultural.
== Treatment == The treatment of individuals with TCS may involve the intervention of professionals from multiple disciplines. The primary concerns are breathing and feeding, as a consequence of the hypoplasia of the mandibula and the obstruction of the hypopharynx by the tongue. Sometimes, they may require a tracheostomy to maintain an adequate airway, and a gastrostomy to assure an adequate caloric intake while protecting the airway. Corrective surgery of the face is performed at defined ages, depending on the developmental state. An overview of the present guidelines:
The U.S. Department of Energy (DOE) has published a list of yearly technical system targets for on-board hydrogen storage for light-duty fuel cell vehicles which guide researchers in the field (5.5 wt %/40 g L−1 by 2017; 7.5 wt %/70 g L−1 ultimate). Materials with high porosity and high surface area such as MOFs have been designed and synthesized in an effort to meet these targets. These adsorptive materials generally work via physical adsorption rather than chemisorption due to the large HOMO–LUMO gap and low HOMO energy level of molecular hydrogen. A benchmark material to this end is MOF-177 which was found to store hydrogen at 7.5 wt % with a volumetric capacity of 32 g L−1 at 77 K and 70 bar. MOF-177 consists of [Zn4O]6+ clusters interconnected by 1,3,5-benzenetribenzoate organic linkers and has a measured BET surface area of 4630 m2 g−1. Another exemplary material is PCN-61 which exhibits a hydrogen uptake of 6.24 wt % and 42.5 g L−1 at 35 bar and 77 K and 2.25 wt % at atmospheric pressure. PCN-61 consists of [Cu2]4+ paddle-wheel units connected through 5,5′,5′′-benzene-1,3,5-triyltris(1-ethynyl-2-isophthalate) organic linkers and has a measured BET surface area of 3000 m2 g−1. Despite these promising MOF examples, the classes of synthetic porous materials with the highest performance for practical hydrogen storage are activated carbon and covalent organic frameworks (COFs).
Sources: en.wikipedia.org
The Prime Minister of Spain at the time, Práxedes Mariano Mateo Sagasta y Escolar, was also a Freemason. It was also in Madrid, and not in Cuba, where José Martí was in the 1870's initiated as a Freemason into Logia Armonía (English: Harmony Lodge).
Boston Women's Health Book Collective (2011). Our bodies, ourselves. New York: Simon & Schuster. ISBN 978-1-4391-9066-1. Preview. Revill, Jo (17 August 2003). "The new nose job: designer vaginas". The Observer. Guardian Media Group. Rogers, Lisa (15 August 2008). "The quest for the perfect vagina". The Guardian. Lisa Rogers (writer and presenter) (17 August 2008). The Perfect Vagina (TV programme). The G-spot series. London: North One Television. Archived from the original on 16 May 2011. Retrieved 18 September 2011 – via Channel 4. Jones, Bethany; Nurka, Camille (January 2015). "Labiaplasty and pornography: a preliminary investigation". Porn Studies. 2 (1): 62–75. doi:10.1080/23268743.2014.984940. hdl:1885/23945. S2CID 71790662.
=== Test patch for child food allergies === The team from DBV Technologies has developed a patented, innovative process, the E-Patch, which is used to determine allergies in children. The ready-to-use, standardised patch tests are highly reliable and conserve the allergic agents in their optimal state. This innovative technique uses the principal of freeze drying and electrification to retain the allergic agents on the patch, without using solvent or glue. The E-patch is then conditioned so that it remains air and water tight. Once applied to the child the allergic agents are rapidly hydrated by body transpiration and liberated from the patch. They enter into contact with the skin and create, if positive, a reaction which can be seen by the doctor 48 hours later.
=== Critical minerals === The G7 established a non-binding "Critical Minerals Resilience and Production Alliance" and agreed to coordinate on financing, traceability, stockpiling and recycling. Leaders set a target of reducing dependence on any single supplier outside the G7 and partner countries for rare earths and permanent magnets to below 60 percent by 2030, with an ambition to reach 50 percent as soon as possible. The declaration did not name China, but the initiative followed Chinese export curbs on permanent magnets that had disrupted several industries and exposed dependence on a single supplier.
Sources: en.wikipedia.org
It is usually classified as an immunomodulatory peptide rather than a classical hormone. It derives from the larger protein prothymosin alpha and acts mainly on immune cells. The thymosin label covers a group of distinct peptides, so the naming can be misleading.
The two share a family name but have different sequences, sizes, and functions. Thymosin beta-4 is a 43-residue peptide associated with actin binding and cell migration. Thymosin alpha-1 is a 28-residue peptide linked mainly to immune signaling.
Thymalfasin is the assigned international nonproprietary name for the synthetic 28-residue peptide. Thymosin alpha-1 is the descriptive research name for the same molecule. Which term appears depends on the context and the regulatory document.
It corresponds to the first 28 amino acids of thymosin beta-4, a larger protein found in many tissues. The fragment is acetylated at its N-terminus and is produced synthetically for research and pharmaceutical use. Synthetic and natural forms share the same sequence.