A practical reference on thymalfasin: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-03-01 and is reviewed periodically as new material appears.
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.
Lyophilized material is typically treated as a hygroscopic solid that should be brought to room temperature before the container is opened, which limits condensation on the powder. Reconstitution is commonly done with sterile water or a buffered diluent, and gentle mixing is preferred over vigorous agitation to reduce foaming and surface adsorption. Because peptides can bind to plastic and glass, diluents containing a small amount of carrier protein are sometimes used in laboratory work. Working solutions are generally aliquoted and prepared fresh rather than subjected to repeated freezing and thawing.
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.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white lyophilized powder | Visual description varies by batch |
| Solubility | Freely soluble in water | Aqueous buffers are commonly used |
| Typical storage temperature | -20 °C or below for powder | Reconstituted liquid kept at 2-8 °C short term |
| Purity method | Reversed-phase HPLC | Value derived from peak area integration |
| Identity method | Mass spectrometry | Confirms mass and sequence integrity |
Laboratory work indicates that the peptide acts on cells of both the innate and adaptive immune systems. Reported effects include signalling through Toll-like receptors on dendritic cells, enhanced T-cell maturation, and increased natural killer cell activity. These actions are described largely from cell-culture and animal experiments, and the precise receptor-level events remain incompletely defined. Studies in humans have generally measured immune markers rather than a single defined molecular target. The resulting picture remains partly descriptive.
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.
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。
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.
Biologically, the peptide is studied mainly in the context of immune cell development and regulation. It is produced in the thymus and in several other tissues, and it appears to influence the maturation and activity of T cells and other immune populations. Laboratory work describes effects on cytokine production, on the balance between T cell subsets, and on the function of dendritic cells. Much of this evidence comes from cell culture and animal models, so the extent to which the same pathways operate in humans remains an open question.
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.
The king of Thogar, called Mendre, or "the Persian" (Po-lo-si), or Anandavarma, had images painted in these caves for the followers of Buddha, by the artist and painter Mitradatta, also by Naravahanadatta, who came from a place of worship (Kultort) of the Niganthas, finally by Priyaratna who came from Syria also with their apprentices (Werkschüler). Mendre, the king, received an image of Amitabha from the emperor of China, and went into the land of blessedness (Sukhavati). A son of the emperor of China came to the castle of Mir-li, killed, according to an oath that he had made, all Jaina-Niganthas and all followers of Kalachakra and restored all the caves for the worship of Buddha (Buddha-Kultus). The Japanese Buddhist scholar Teramoto Enga gave a rather different translation:
==== Wet ==== The irradiated bismuth (or sometimes bismuth trioxide) target is first dissolved in, for example, concentrated nitric or perchloric acid. Following this first step, the acid can be distilled away to leave behind a white residue that contains both bismuth and the desired astatine product. This residue is then dissolved in a concentrated acid, such as hydrochloric acid. Astatine is extracted from this acid using an organic solvent such as dibutyl ether, diisopropyl ether (DIPE), or thiosemicarbazide. Using liquid-liquid extraction, the astatine product can be repeatedly washed with an acid, such as HCl, and extracted into the organic solvent layer. A separation yield of 93% using nitric acid has been reported, falling to 72% by the time purification procedures were completed (distillation of nitric acid, purging residual nitrogen oxides, and redissolving bismuth nitrate to enable liquid–liquid extraction). Wet methods involve "multiple radioactivity handling steps" and have not been considered well suited for isolating larger quantities of astatine. However, wet extraction methods are being examined for use in production of larger quantities of astatine-211, as it is thought that wet extraction methods can provide more consistency. They can enable the production of astatine in a specific oxidation state and may have greater applicability in experimental radiochemistry.
Social behavior is behavior among two or more organisms within the same species, and encompasses any behavior in which one member affects the other. This is due to an interaction among those members. Social behavior can be seen as similar to an exchange of goods, with the expectation that when one gives, one will receive the same. This behavior can be affected by both the qualities of the individual and the environmental (situational) factors. Therefore, social behavior arises as a result of an interaction between the two—the organism and its environment. This means that, in regards to humans, social behavior can be determined by both the individual characteristics of the person, and the situation they are in.
== Ecological relevance == Numerous studies and published data comparing Microtox results with toxicity values for fish, crustaceans and algae have found a positive correlation. However, others have pointed out that the effect of luminosity on the survival of organisms is unknown. Concerns have also been expressed regarding the use of sediment extracts and not the sediment itself. It is possible that only water-soluble contaminants will be tested for, and therefore may not be representative of the full range of contaminants present in the sediment. Extracts may also remove contaminants that are not bioavailable. This could lead to an over or under estimation of contaminants and their biological effects.
As a result of illegal tactics, including illegal surveillance and vigilantism, used by the RCMP Security Service and the consequent scandals surrounding the RCMP, intelligence work was transferred to a new agency, CSIS in 1984 through the implementation of Bill C-9.
Sources: en.wikipedia.org
=== 2010 and beyond === By around 2010, Hanmi's R&D had two areas of interest: developing longer-lasting peptide and protein therapeutics using its "Lapscovery" technology, and developing small molecule tyrosine-kinase inhibitors for cancer and autoimmune diseases. Its strategy was to developmental incremental modifications of existing drugs, create new combination drugs, and to develop novel drugs. In August 2014 Hanmi exclusively licensed rights in China for poziotinib, a small molecule EGFR inhibitor, to the Chinese company Luye Pharma; in February 2015 Hanmi licensed rights in the rest of the world outside of South Korea to Spectrum Pharmaceuticals. In March 2015 Hanmi and Lilly signed an exclusive license outside of Asia for Hanmi's small molecule Bruton's tyrosine kinase inhibitor in the field of autoimmune diseases; Lilly paid $50 million upfront and the deal included up to $640 million in milestones and royalties greater than 10%. In November 2015 Hanmi signed three agreements:
A number of studies have shown that tobacco use is a significant factor in miscarriages among pregnant smokers, and that it contributes to a number of other threats to the health of the fetus such as low birth weight and pre-term birth. It slightly increases the risk of neural tube defects. Environmental tobacco smoke exposure and maternal smoking during pregnancy have been shown to cause lower infant birth weights.
=== ATP recycling === The total quantity of ATP in the human body is about 0.1 mol/L. The majority of ATP is recycled from ADP by the aforementioned processes. Thus, at any given time, the total amount of ATP + ADP remains fairly constant. The energy used by human cells in an adult requires the hydrolysis of 100 to 150 mol/L of ATP daily, which means a human will typically use their body weight worth of ATP over the course of the day. Each equivalent of ATP is recycled 1000–1500 times during a single day (150 / 0.1 = 1500), at approximately 9×1020 molecules/s.
== Status == In the context of perpetual motion machines such as the Orbo, Professor Eric Ash has argued at the BBC: "Denying [conservation of energy] would undermine not just little bits of science - the whole edifice would be no more. All of the technology on which we built the modern world would lie in ruins". It is because of conservation of energy that "we know - without having to examine details of a particular device - that Orbo cannot work." Energy conservation has been a foundational physical principle for about two hundred years. From the point of view of modern general relativity, the lab environment can be well approximated by Minkowski spacetime, where energy is exactly conserved. The entire Earth can be well approximated by the Schwarzschild metric, where again energy is exactly conserved. Given all the experimental evidence, any new theory (such as quantum gravity), in order to be successful, will have to explain why energy has appeared to always be exactly conserved in terrestrial experiments. In some speculative theories, corrections to quantum mechanics are too small to be detected at anywhere near the current TeV level accessible through particle accelerators. Doubly special relativity models may argue for a breakdown in energy-momentum conservation for sufficiently energetic particles; such models are constrained by observations that cosmic rays appear to travel for billions of years without displaying anomalous non-conservation behavior.
Sources: en.wikipedia.org
Jung saw Freud's theory of the unconscious as incomplete, unnecessarily negative, and inelastic. According to Jung, Freud conceived the unconscious solely as a repository of repressed emotions and desires. Jung's observations overlap to an extent with Freud's model of the unconscious, what Jung called the "personal unconscious", but his hypothesis is more about a process than a static model, and he also proposed the existence of a second, overarching form of the unconscious beyond the personal, that he named the psychoid—a term borrowed from neo-vitalist philosopher and embryologist Hans Driesch (1867–1941)—but with a somewhat altered meaning. The collective unconscious is not so much a 'geographical location', but a deduction from the alleged ubiquity of archetypes over space and time. Consequently, their personal and professional relationship fractured—each stating the other could not admit he could be wrong. In November 1912, Jung and Freud met in Munich for a meeting among prominent colleagues to discuss psychoanalytical journals. At a talk about a new psychoanalytic essay on Amenhotep IV, Jung expressed his views on how it related to actual conflicts in the psychoanalytic movement. While Jung spoke, Freud suddenly fainted, and Jung carried him to a couch. In early January 1913, Freud wrote to Jung, proposing that "we abandon our private relationship entirely. I will lose nothing, because I have long been joined to you only by the thin thread of the further development of past disappointments". Jung agreed to comply with this arrangement.
The enzyme is a cytochrome P450 protein containing heme, isolated from Ammi majus. It uses molecular oxygen for the oxidation and requires a partner cytochrome P450 reductase for functional expression. This uses nicotinamide adenine dinucleotide phosphate. The oxidoreductase is also called CYP71AJ1.
=== Helicopter evacuation and capture === Following Ceaușescu's second failed attempt to address the crowd, he and Elena fled into a lift headed for the roof. A group of protesters managed to force their way into the building, overpowered Ceaușescu's bodyguards and made their way through his office before heading onto the balcony. They were unaware they were only a few metres from Ceaușescu. The lift's electricity failed just before it reached the top floor, and Ceaușescu's bodyguards forced it open and ushered the couple onto the roof. At 11:20 on 22 December 1989, Ceaușescu's personal pilot, Lieutenant Colonel Vasile Maluțan, received instructions from Lieutenant General Opruta to proceed to Palace Square to pick up the president. As he flew over Palace Square he saw it was impossible to land there. Maluțan landed his white Dauphin, #203, on the terrace at 11:44. A man brandishing a white net curtain from one of the windows waved him down. Maluțan said, "Then Stelică, the co-pilot, came to me and said that there were demonstrators coming to the terrace. Then the Ceaușescus came out, both practically carried by their bodyguards ... They looked as if they were fainting. They were white with terror. Manea Mănescu [one of the vice-presidents] and Emil Bobu were running behind them. Mănescu, Bobu, Neagoe and another Securitate officer scrambled to the four seats in the back ... As I pulled Ceaușescu in, I saw the demonstrators running across the terrace ... There wasn't enough space, Elena Ceaușescu and I were squeezed in between the chairs and the door ...
Sources: en.wikipedia.org
Cold storage slows the chemical degradation reactions that occur in solution. Lyophilized powder is more stable than reconstituted liquid and tolerates longer storage periods. Repeated temperature cycling should still be avoided because it can drive aggregation and loss of material.
Mass spectrometry is the standard confirmation of molecular mass and acetylation state. Chromatography establishes purity but does not identify the molecule on its own. The two techniques are normally applied together during verification.
No, because the reported value reflects the detection method and wavelength used, which vary between laboratories. A number stated without method details cannot be compared directly with another supplier's figure. Requesting the chromatogram and the method conditions is a common way to interpret it.
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.