Everything below concerns Tesamorelin. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2025-10-17. Where a claim depends on a specific study, the study is described rather than over-claimed.
Tesamorelin is a synthetic peptide analog of growth hormone-releasing hormone (GHRH). Its sequence corresponds to the 44-amino-acid form of human GHRH with a trans-3-hexenoyl group attached to the N-terminal tyrosine. This modification slows enzymatic cleavage and extends the peptide's activity relative to the native hormone. The compound is produced by solid-phase peptide synthesis and supplied as a lyophilized powder. Researchers classify it as a GHRH receptor agonist. Its structure places it in the same family as other growth hormone secretagogues that act on the pituitary.
Binding of tesamorelin to GHRH receptors on pituitary somatotroph cells triggers cyclic AMP signaling and the release of growth hormone into circulation. Because the peptide acts upstream of the growth hormone axis, its effects are partly mediated by hepatic insulin-like growth factor 1 (IGF-1) production. The pulsatile character of endogenous growth hormone secretion is preserved rather than replaced. Whether amplified signaling produces effects beyond those of native GHRH remains an area of ongoing investigation.
Development work on the compound, originally designated TH9507, focused on conditions in which reduced growth hormone signaling is thought to contribute to altered body composition. The United States Food and Drug Administration approved it in 2010 for the treatment of excess visceral abdominal fat in adults with human immunodeficiency virus infection and lipodystrophy. Later research examined other populations, including adults with mild cognitive impairment, where a large trial did not meet its primary endpoints. This mixed record illustrates how a single mechanism can produce clear effects in one setting and inconclusive results in another.
Several related peptides act on the same receptor, including sermorelin, a shorter GHRH fragment, and modified analogs such as CJC-1295 and modified GRF(1-29) that are common in research settings rather than approved products. Tesamorelin differs from growth hormone itself in that it acts upstream, prompting the pituitary to release the hormone through physiological signaling rather than supplying it directly. Terminology in the literature distinguishes GHRH analogs, growth hormone secretagogues, and recombinant growth hormone, although popular discussion often blurs these categories together. Precise naming matters when comparing study results.
Tesamorelin is a synthetic peptide of 44 amino acids that reproduces the sequence of human growth hormone-releasing hormone (GHRH) and carries a trans-3-hexenoyl group on its N-terminal tyrosine. That small fatty-acid modification blocks cleavage by dipeptidyl peptidase-4, the enzyme that rapidly degrades native GHRH in plasma. The result is a molecule with a longer circulating half-life than the natural hormone while retaining the same receptor target. It is supplied as a lyophilized powder for reconstitution and belongs to the broader class of GHRH analogs studied for effects on pituitary growth hormone secretion.
| Property | Value | Notes |
|---|---|---|
| Molecular class | Synthetic peptide | GHRH receptor agonist |
| Residue count | 44 amino acids | N-terminal trans-3-hexenoyl group |
| Approximate mass | About 5.1 kDa | Derived from the peptide sequence |
| Primary target | Pituitary GHRH receptor | Somatotroph cells of the anterior pituitary |
| Downstream marker | IGF-1 | Measured indirectly in circulation |
Physicochemical behavior is dominated by the peptide backbone. The molecule is hydrophilic and carries a net positive charge near neutral pH, owing to several arginine and lysine residues. In solution it adopts a largely unstructured conformation, and aggregation is a known concern for peptide products of this size. Oxidation of methionine and deamidation of asparagine or glutamine residues are the principal chemical degradation routes. These liabilities shape how the material is formulated, handled, and analyzed, and they explain why lyophilized presentations are common in research settings.
Tesamorelin is a synthetic peptide analog of growth hormone-releasing hormone, built from 44 amino acids. Its sequence follows the natural human GHRH(1-44) backbone, with a trans-3-hexenoyl group attached to the N-terminal tyrosine. This modification blocks recognition by dipeptidyl peptidase IV, the enzyme that rapidly truncates the native hormone in circulation. The result is a molecule with a substantially longer plasma residence time than unmodified GHRH, which makes it practical for clinical and laboratory study.
Receptor-level activity begins when the peptide binds the GHRH receptor, a class B G-protein-coupled receptor found on pituitary somatotroph cells. Occupancy triggers Gs-mediated activation of adenylyl cyclase and a rise in intracellular cyclic AMP, which in turn promotes synthesis and pulsatile release of growth hormone. Because the compound acts upstream of the growth hormone axis rather than supplying hormone directly, its effect depends on intact pituitary function. Binding studies in cell culture and animal models have established this pathway; the detailed kinetics of receptor recycling in humans remain less well characterized.
There were two packs (contents identical), the standard 24 Hour Ration and the 24 Hour Ration (Assault), the former fitting into the larger portion of the mess tin and the latter fitting into the smaller portion. The pack provided approximately 4000 calories. The contents of the ration pack were as follows, most of which were wrapped in either cellophane or in white, heat-sealed wax paper with royal blue writing:1 block of dried meat (beef or lamb), 2 sweetened oatmeal blocks, tea, milk and sugar cubes, 10 biscuits (plain, service), 2 bars of raisin chocolate, 1 bar of vitamin enriched chocolate (vit. A, B, C, D and calcium), 4 ounces (110 g) of boiled sweets, 2 packets of peppermint chewing gum, 4 meat extract cubes, 4 cubes of sugar, salt, 4 sheets of latrine paper.
The Commission had general powers of administration and was particularly "charged with the duty of arranging for the vote and of taking such measures as it may deem necessary to ensure its freedom, fairness, and secrecy. The Commission will have all necessary authority to decide any questions to which the execution of these provisions may give rise. The Commission will make such arrangements as may be necessary for assistance in the exercise of its functions by officials chosen by itself from the local population. Its decisions will be taken by a majority". The Commission was welcomed by the Poles in the region, who hoped that its presence would improve their situation, but petitions were made to remove German officials and the Sicherheitswehr and demanded the official welcoming committee of German officials to show the representatives of the Allies the plight of ethnic Poles. On 18 February 1919, the Allenstein-based commission decreed that the Polish language would gain equal rights to the German language in the region. The commission eventually had to remove both the mayor of Allenstein, Georg Zülch, and an officer of Sicherheitswehr, Major Oldenburg, after a Polish banner at the local consulate of Poland was defaced. The Poles expressed gratitude for Allied protection of Polish rights and underlined their desire for peaceful co-existence with the Germans. In April 1920, during a Polish theatrical performance in Deuthen (Dajtki), near Allenstein, Poles were attacked by pro-German activists.
== Electoral system == The president of Venezuela is elected by direct, secret ballot in a single nationwide constituency using plurality voting (first-past-the-post). Elections are organised and supervised by the National Electoral Council (CNE), one of the five constitutionally recognised branches of government, which oversees an automated voting system with electronic machines and paper audit trails. Article 227 of the Constitution sets eligibility criteria for presidential candidates, including being Venezuelan by birth without another nationality, at least 30 years old and with no disqualifying criminal convictions, while Article 229 bars sitting executive vice-presidents, ministers, governors and mayors from running unless they leave office beforehand.
== Widening contamination == The search widened when some manufacturers tested positive despite reportedly not using Chinese milk. The Sri Lankan manufacturer of Munchee Lemon Puff biscuits, having tested positive in Switzerland, categorically stated that its powdered milk or milk products were sourced only from Australia, the Netherlands and Canada; similarly, Pokka products without milk or its derivatives from China were found by Vietnamese authorities to be contaminated.
Sources: en.wikipedia.org
The new 17th district is anchored in Waco and its surrounding metropolitan area, with a small sliver of the district extending into the east side of Temple and a southern sliver of Williamson County, with the Austin suburb of Cedar Park connected to the rest of the district via a small sliver of Round Rock. The incumbent is Republican Pete Sessions, who was re-elected with 66.4% of the vote in 2024. The new district gave 60% of the vote to Donald Trump and 57.5% to Ted Cruz in 2024.
Cryptogenic organizing pneumonia (COP), formerly known as bronchiolitis obliterans organizing pneumonia (BOOP), is an inflammation of the bronchioles (bronchiolitis) and surrounding tissue in the lungs. It is a form of idiopathic interstitial pneumonia. It is often a complication of an existing chronic inflammatory disease such as rheumatoid arthritis, dermatomyositis, or it can be a side effect of certain medications such as amiodarone. COP was first described by Gary Epler in 1985. The clinical features and radiological imaging resemble infectious pneumonia. However, diagnosis is suspected after there is no response to multiple antibiotics, and blood and sputum cultures are negative for organisms.
The energy released is about 180 kJ/mol, which is conserved when 2 ATP are generated from 2 ADP per glucose. Anaerobic bacteria and archaea use these and many other fermentative pathways, e.g., propionic acid fermentation, butyric acid fermentation, solvent fermentation, mixed acid fermentation, butanediol fermentation, Stickland fermentation, acetogenesis, or methanogenesis.
=== Pharmacokinetics === Hydroxychloroquine has similar pharmacokinetics to chloroquine, with rapid gastrointestinal absorption, large distribution volume, and elimination by the kidneys; Tmax is 2–4.5 hours. Cytochrome P450 enzymes (CYP2D6, 2C8, 3A4 and 3A5) metabolize hydroxychloroquine to N-desethylhydroxychloroquine. Both agents also inhibit CYP2D6 activity and may interact with other medications that depend on this enzyme.
== Career == In 1953 he was elected to a Life Fellowship at King's, where he remained for the whole of his academic career, holding the positions of Financial Tutor (1956–1959), Director of Studies in Natural Sciences (1961–1981), Vice Provost (1981–1986) and Praelector (1989–1992), as well as co-editor of the College Register. In 1954 he was appointed as University Demonstrator in biochemistry, and in 1959 was promoted to University Lecturer. From 1964 to 1965, he worked at the Engelhardt Institute of Molecular Biology in Moscow as part of a UK-USSR exchange program. Dixon was an editor of The Biochemical Journal, and was Deputy Chairman of the Editorial Board from 1977 to 1982. He was secretary of the Nomenclature Committee of the International Union of Biochemistry from 1977 to 1982 and chairman from 1983 to 1988, and after his retirement remained an advisory member. Dixon's research in chemistry and biochemistry led to 136 published papers. His interests included the pH-dependence of enzyme-catalysed reactions, arsenic biochemistry, protein modification and other aspects of enzymology. His particular interest in applications of methods from organic chemistry to biochemistry led to a proposed treatment for Wilson's disease. In 1957 he married Heather Spittle with whom he had three children. After his death, a set of rooms in the Gibbs' Building in King's College was named the Hal Dixon Rooms in his memory.
Sources: en.wikipedia.org
The Green Party says it has blocked a "small number" of candidates from standing as Green candidates at the election after investigations into their online activities. Plaid Cymru withdraws its support for Sharifah Rahman, who was scheduled to represent the party as a candidate in Cardiff South and Penarth, following social media posts about the "situation in the Middle East" that "do not reflect the views and values of Plaid Cymru". The Senedd Reform Bill Committee has warned that plans for gender quotas at the next Senedd election could face legal challenges, and urges the Welsh Government to take urgent action to protect the election. 8 June – Stewart Sutherland, the Reform UK candidate for Blaenau Gwent and Rhymney, withdraws his candidacy after allegations he reported racist content. Social media platform X takes action against an organisation that has been smearing British politicians with deepfake videos by removing a number of accounts. 9 June – The Sunday Mail reports allegations that Scottish Conservative leader Douglas Ross used Westminster expenses to travel in his role as a football linesman. 10 June – The list of candidates standing in the 2024 general election is published, with more than 4,500 candidates setting a new record for the number of people standing at an election. Douglas Ross announces his resignation as leader of the Scottish Conservatives, triggering a leadership election. Ross says he will also resign from Holyrood if he is re-elected to Westminster.
Freeze-drying, also known as freeze-casting or ice-templating, offers an alternative to the high temperature and high-pressure requirements of supercritical drying. Additionally, freeze-drying offers more control of the solid structure development by controlling the ice crystal growth during freezing. In this method, a colloidal dispersion of the aerogel precursors is frozen, with the liquid component freezing into different morphologies depending on a variety of factors such as the precursor concentration, type of liquid, temperature of freezing, and freezing container. As this liquid freezes, the solid precursor molecules are forced into the spaces between the growing crystals. Once completely frozen, the frozen liquid is sublimed into a gas through lyophilization, which removes much of the capillary forces, as was observed in supercritical drying. Though typically classified as a "cryogel", aerogels produced through freeze-drying often experience some shrinkage and cracking while also producing a non-homogenous aerogel framework. This often leads to freeze-drying being used for the creation of aerogel powders or as a framework for composite aerogels.
In 2015, the first ionization energy of lawrencium was measured, using the isotope 256Lr. The measured value, 4.96+0.08−0.07 eV, agreed very well with the relativistic theoretical prediction of 4.963(15) eV, and also provided a first step into measuring the first ionization energies of the transactinides. This value is the lowest among all the lanthanides and actinides, and supports the s2p configuration as the 7p1/2 electron is expected to be only weakly bound. As ionisation energies generally increase left to right in the f-block, this low value suggests that lutetium and lawrencium belong in the d-block (whose trend they follow) and not the f-block. That would make them the heavier congeners of scandium and yttrium, rather than lanthanum and actinium. Although some alkali metal-like behaviour has been predicted, adsorption experiments suggest that lawrencium is trivalent like scandium and yttrium, not monovalent like the alkali metals. A lower limit on lawrencium's second ionization energy (>13.3 eV) was experimentally found in 2021. Even though s2p is known to be the ground-state configuration of the lawrencium atom, ds2 should be a low-lying excited-state configuration, with an excitation energy variously calculated as 0.156 eV, 0.165 eV, or 0.626 eV. As such lawrencium may still be considered to be a d-block element, albeit with an anomalous electron configuration (like chromium or copper), as its chemical behaviour matches expectations for a heavier analogue of lutetium.
=== Muscle aging === Muscle apelin expression decreases with age in rodents and humans. By supplementing aged mice with exogenous apelin, Cedric Dray, Philippe Valet, and their colleagues demonstrated that the peptide was able to promote muscle hypertrophy and consequently induced a gain in strength. This study also demonstrated that apelin targets muscle cells during aging by different and complementary pathways: it acts on muscle metabolism by activating an AMPK-dependent mitochondria biogenesis, it promotes autophagy and decreases inflammation in aged mice. Moreover, apelin receptor is also present on muscle stem cells and promotes in vitro and in vivo cellular proliferation and differentiation of these cells into mature muscle cells that participate in muscle regeneration. Finally, muscle apelin could be used as a biomarker of physical exercise success in aged individuals since its production is correlated to the benefit of a chronic physical exercise in aged individuals. In late 2022, the longevity therapeutics company BioAge announced that its licensed, orally-available apelin receptor agonist BGE-105 had greatly decreased muscle loss and sustained muscle quality and muscle protein synthesis during 10 days of bed rest in healthy volunteers aged 65 or older participating in a double-blind, placebo-controlled Phase 1b trial. They plan to proceed to a Phase 2 trial in older patients who are on ventilators in the intensive care unit (ICU).
=== Metabolic disorders === Preclinical evidence from animal models suggests that S. boulardii supplementation may reduce body weight in the context of type 2 diabetes; however, clinical evidence in humans is currently lacking. Additional studies in diet-induced obesity models further support these findings, showing that S. boulardii can attenuate weight gain, reduce food intake, and increase energy expenditure. These effects are accompanied by coordinated changes in gut microbiota composition, microbial metabolic activity, and host immune signaling, including reduced inflammatory pathways (e.g., TNFα/NF-κB) and shifts in metabolites linked to metabolic regulation, suggesting modulation of the gut–immune–metabolic axis.
Sources: en.wikipedia.org
It mirrors the 44-residue form of human growth hormone-releasing hormone. A hexenoyl group on the N-terminal tyrosine distinguishes it from the unmodified hormone. The change is intended to improve resistance to enzymatic breakdown.
The N-terminal modification reduces cleavage by circulating peptidases, so the peptide persists longer than native GHRH. That persistence is the main rationale for the synthetic design. Comparative half-life values in humans are reported in regulatory review documents rather than in general reference literature.
Reductions in visceral adipose tissue have been measured in controlled studies of defined populations. Whether the effect generalizes to other groups and persists after treatment stops is less clear. Longer-term outcome data remain limited.
It is a synthetic peptide built from 44 amino acids arranged in the same order as human growth hormone-releasing hormone. A short fatty-acid chain, described as a trans-3-hexenoyl group, is attached to the first amino acid. The finished molecule is formulated as a sterile powder that is dissolved before use.