The short version of visceral adiposity fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2025-09-11 and is reviewed periodically as new material appears.
Clinical interest in tesamorelin arose from the need to address visceral adiposity in people living with HIV. Antiretroviral therapy improved survival but was associated in some patients with central fat accumulation, altered lipid profiles, and metabolic complications. This condition, often called HIV-associated lipodystrophy, involves excess visceral adipose tissue that is difficult to manage through diet and exercise alone. Investigators evaluated tesamorelin because GHRH analogs can stimulate growth hormone secretion and influence fat distribution without direct liposuction or invasive procedures.
A Phase 3 program led to regulatory approval in the United States in 2010 for reduction of excess visceral abdominal fat in adults with HIV and lipodystrophy. Subsequent studies examined effects on liver fat, muscle area, and metabolic markers, with mixed findings for some endpoints. Long-term cardiovascular outcomes and effects on mortality remain uncertain because most trials were relatively short and focused on imaging-based fat measurements. Use in populations without HIV has been studied experimentally but is not part of the approved indication.
Tesamorelin is a synthetic analog of growth hormone-releasing hormone, a peptide hormone produced by the hypothalamus. The molecule retains the 44-amino-acid sequence of human GHRH and carries a trans-3-hexenoyl modification at its N-terminus. This modification increases resistance to enzymatic degradation and extends the peptide's functional stability relative to native GHRH. The compound is supplied as a lyophilized powder for reconstitution and subcutaneous administration in clinical settings. Its development code was TH9507, and it belongs to the GHRH analog class. It is not a growth hormone product; instead, it acts upstream to stimulate endogenous growth hormone release.
特沙莫瑞林的检测通常依赖反相高效液相色谱和质谱联用。反相色谱可分离肽主峰与缺失序列、氧化产物等杂质，质谱则提供精确质量以确认身份。对于复杂基质中的定量，常采用液相色谱-串联质谱，并配合固相萃取或蛋白沉淀。生物样品中的肽易降解，因此采集和处理条件会影响结果。
稳定性研究通常考察温度、光照、湿度和 pH 对肽链的影响。冻干粉在低温避光条件下较为稳定，复溶后则需控制保存时间并避免反复冻融。肽类可能发生氧化、脱酰胺、水解和聚集，这些变化会改变色谱纯度。强制降解实验用于识别主要降解途径并验证分析方法的专属性。
质量控制项目一般包括外观、身份、纯度、含量、有关物质、水分和微生物限度。身份确认可通过肽图谱、氨基酸分析和质谱完成，纯度则用面积归一化法计算。研究级材料与药品级材料的要求不同，前者常缺少完整药典验证。不同批次间杂质谱是否影响活性，仍是一个需要具体数据回答的问题。
| Property | Value | Notes |
|---|---|---|
| Molecular weight | Approximately 5,136 Da | Based on the 44-amino-acid peptide backbone and N-terminal modification. |
| Appearance | White to off-white lyophilized powder | Usually supplied in single-use vials for reconstitution. |
| Solubility | Freely soluble in water; slightly soluble in some organic solvents | Peptide nature supports aqueous reconstitution. |
| Typical storage | 2–8 °C, protected from light | Refrigeration reduces degradation; avoid freezing unless specified. |
| Common analytical method | Reverse-phase high-performance liquid chromatography | Used for identity, purity, and quantification. |
| Synonyms | Tesamorelin, TH9507, GHRH(1-44) analog | Generic descriptors; avoid proprietary names. |
The native hormone is produced in the hypothalamus and acts on the anterior pituitary. Binding of GHRH to its receptor stimulates synthesis and release of growth hormone into circulation. Because the analogue retains the receptor-binding region of the parent sequence, it engages the same receptor and triggers the same downstream signaling. The result is increased growth hormone secretion from pituitary cells, which in turn influences hepatic production of insulin-like growth factor 1. This axis is the basis for the compound's measured biological effects.
Interest in this peptide developed because native GHRH has a short circulating lifetime. The N-terminal modification slows cleavage by dipeptidyl peptidase IV, an enzyme that removes the first two residues of many peptides and terminates their activity. Slower degradation means a longer window of receptor stimulation per administration. This design logic parallels other modified peptide hormones, where a small chemical change at a vulnerable site yields a more durable molecule without altering the core mechanism of action.
The peptide is synthesized chemically rather than extracted from biological sources. Solid-phase synthesis builds the chain from the C-terminus toward the N-terminus, after which the hexenoyl group is attached. Purity is typically assessed by high-performance liquid chromatography, and identity is confirmed by mass spectrometry. Regulatory review of the finished product focuses on these analytical controls, since small deviations in sequence or modification can change biological activity. Questions about long-term effects on the pituitary axis remain areas of continued investigation.
冻干粉末一般在 -20°C 或更低温度、干燥避光条件下保存，可维持较长时间的稳定。复溶后稳定性明显下降，溶液中的肽链易发生水解、氧化与聚集，通常需冷藏并在短期内用完。反复冻融会加速聚集与降解，建议分装后单次使用。缓冲体系的 pH 与离子强度同样影响聚集速率，需要按具体实验条件验证。
研究用与临床用材料的标准并不相同。质量控制通常覆盖纯度、残留溶剂、反离子含量、微生物限度与内毒素水平，各项均有对应检测方法。随货文件应包含批号、检测项目、方法与结果，使数据可以追溯。核验时应关注纯度是否按主峰面积计算、杂质是否已定性、方法是否经过验证，这些信息决定结果能否被外部重复。
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.
The so-called "border war" of the 1970s and 1980s was not actually a war at all by classic standards. At the same time it eludes exact definitions. The core of it was a protracted insurgency in South West Africa, later South-West Africa/Namibia and still later Namibia. At the same time it was characterised by the periodical involvement of the SADF in the long civil war taking place in neighbouring Angola, because the two conflicts could not be separated from one another. The South West African People's Organisation (SWAPO) has described the South African Border War as the Namibian War of National Liberation and the Namibian Liberation Struggle. In the Namibian context, it is also commonly referred to as the Namibian War of Independence. However, these terms have been criticised for ignoring the wider regional implications of the war and the fact that most of the fighting took place in countries other than Namibia.
metabolic pathway A stepwise series of biochemical reactions occurring within a cell, often but not necessarily catalyzed by specific enzymes, that fulfills some activity or process related to metabolism. The reactions are linked by the sharing of reactants, products, or intermediate compounds in consecutive steps, such that the product of one reaction is used as a reactant in a subsequent reaction. Byproducts are often removed from the cell as metabolic waste. The overall pathway may be anabolic, catabolic, or amphibolic in nature. In any actively metabolizing cell, an elaborate network of interconnected metabolic pathways is required to maintain homeostasis, with degradative catabolic processes providing the energy necessary to conduct anabolic biosynthesis; for example, glycolysis, the electron transport chain, and oxidative phosphorylation provide the ATP used in fatty acid synthesis. The flux of metabolites through each pathway is regulated by the needs of the cell and the availability of substrates.
He went on to lose all three semifinals to the eventual champion of all three events, Jannik Sinner, failing to win a set in any of the three matches and extending his ongoing losing streak to eight consecutive losses against the Italian. Zverev then failed to defend the title in Munich, being defeated by Flavio Cobolli in the semifinals. In Madrid, Zverev advanced to his fourth final in the Magic Box, a first Masters 1000 final of the season for a chance at a third Madrid Open title. He went on to lose to Sinner again in straight sets. The following week, he was upset by home favourite Luciano Darderi at the round of 16 of the Italian Open, ending his run of five successive Masters 1000 semifinals dating back to the Paris Masters. At the French Open, Zverev won his maiden major title. He entered the tournament as the second seed, after two-time defending champion Carlos Alcaraz withdrew due to an ongoing wrist injury. Following Jannik Sinner's abrupt loss to Juan Manuel Cerundolo and three-time French Open champion Novak Djokovic's loss to Joāo Fonseca, Zverev was widely labelled the tournament favourite, a label he distanced himself from as the tournament progressed. By reaching his sixth consecutive quarterfinal appearance in Paris, Zverev joined Roger Federer, Rafael Nadal, and Djokovic as the only men's singles players to achieve this feat. He then advanced to his second French Open final and fourth major final following wins against Rafael Jódar in the quarterfinals and Jakub Menšík in the semifinal.
Sources: en.wikipedia.org
MycoTB: An extended flexible system concept for building standalone Windows software. The software allows users to build their own flexible systems on their personal computers to manage and annotate whole proteomes of MycoTB.
==== Abolition of the state ==== Socialist Studies accuses the SPGB of coming under the influence of anarchist ideas and not sufficiently emphasising the parliamentary aspect of the socialist revolution. Socialist Studies claims that the SPGB's position is that the state would be abolished immediately upon the overthrow of class society whereas Socialist Studies's position is that the state would "gradually wither away" instead. Referring to the SPGB's 1984 conference resolution (since rescinded) that "Socialism will entail the immediate abolition of and not the gradual decline of the State", Socialist Studies writes: If you are in favour of the immediate abolition of the State when Socialism is established then you are in favour of its immediate abolition here and now, which is of course the anarchist position. [...] Unless Socialists use the power of the machinery of government to dispossess the capitalist class they will be unable to establish Socialism. We find it inconceivable that intelligent Socialists of a future generation would even consider such an act of monumental stupidity.
A broader survey of Drosophila de novo proteins likewise found that most differ from conserved proteins in predicted properties, but that a subset are predicted to adopt known folds and participate in specific cellular processes. Inference from prediction tools requires caution because many predictors were trained and benchmarked primarily on conserved, globular proteins, and their performance can be biased for short or low-homology sequences. In particular, disorder predictions can be sensitive to parameter choices, and different structure predictors (including alignment-based and protein language model approaches) may disagree on de novo proteins and yield low-confidence models. Comparisons of "newly born" orphan proteins to "never born" random polypeptides using multiple deep-learning structure predictors similarly reported that predicted models are often of low quality while still allowing limited qualitative comparisons across sequence sets.
Sources: en.wikipedia.org
Both peptides have been shown "in vivo" to bind to the 93 kDa subunit of sucrose synthase, an essential component in sucrose metabolism. Sucrose degradation is a key step in nitrogen fixation, and is a pre-requisite for normal nodule development. Phytosulfokine (PSK) — was first identified as a "conditioning factor" in asparagus and carrot cell cultures. The bioactive five amino acid peptide (PSK) is proteolytically processed from an ~80 amino acid precursor secreted peptide. PSK has been demonstrated to promote cellular proliferation and transdifferentiation. It has been demonstrated that PSK binds to a membrane bound LRR receptor like kinase (PSKR). POLARIS (PLS) — The PLS peptide has a predicted length of 36 amino acids however possesses no secretion signal, suggesting that it functions within the cytoplasm. The PLS peptide itself has not yet been biochemically isolated, however loss-of-function mutants are hypersensitive to cytokinin with reduced responsiveness to auxin. Developmentally it is involved in vascularization, longitudinal cell expansion and increased radial expansion. Rapid Alkalinization Factor (RALF) — is 49 amino acid peptide that was identified whilst purifying systemin from tobacco leaves, it causes rapid medium alkanalization and does not activate defence responses like systemin. Tomato RALF precursor cDNA encodes a 115 amino acid polypeptide containing an amino-terminal signal sequence with the bioactive RALF peptide encoded at the carboxy terminus.
Medications such as ibuprofen or paracetamol (acetaminophen) may help with this as well as lower temperature. Children younger than three months require medical attention, as might people with serious medical problems such as a compromised immune system or people with other symptoms. Hyperthermia requires treatment. Fever is one of the most common medical signs. It is part of about 30% of healthcare visits by children and occurs in up to 75% of adults who are seriously sick. While fever evolved as a defense mechanism, treating a fever does not appear to improve or worsen outcomes. Fever is often viewed with greater concern by parents and healthcare professionals than is usually deserved, a phenomenon known as "fever phobia".
These mechanism-based methods use knowledge about the polymerase amplification process to generate estimates of the original sample concentration. An extension of this approach includes an accurate model of the entire PCR reaction profile, which allows for the use of high signal-to-noise data and the ability to validate data quality prior to analysis. According to research of Ruijter et al. MAK2 assumes constant amplification efficiency during the PCR reaction. However, theoretical analysis of polymerase chain reaction, from which MAK2 was derived, has revealed that amplification efficiency is not constant throughout PCR. While MAK2 quantification provides reliable estimates of target DNA concentration in a sample under normal qPCR conditions, MAK2 does not reliably quantify target concentration for qPCR assays with competimeters.
Stigmata (Ancient Greek: στίγματα, plural of στίγμα stigma, 'mark, spot, brand'), in Roman Catholicism, are bodily wounds, scars and pain which appear in locations corresponding to the crucifixion wounds of Jesus Christ: the hands, wrists, feet, near the heart, the head (from the crown of thorns), and back (from carrying the cross and scourging). St. Francis of Assisi is widely considered the first recorded stigmatic. For over fifty years, St. Padre Pio of Pietrelcina of the Order of Friars Minor Capuchin reported stigmata which were studied by several 20th-century physicians. Stigmatics are primarily a Roman Catholic phenomenon; the Eastern Orthodox Church professes no official view on them. A high percentage (probably over 80%) of all stigmatics are women. In his book Stigmata: A Medieval Phenomenon in a Modern Age, Ted Harrison suggests that there is no single mechanism whereby the marks of stigmata were produced. What is important is that the marks are recognised by others as being of religious significance. Most cases of stigmata have been the result of trickery and fraud. Some cases have also included reportings of a mysterious chalice in visions being given to stigmatics to drink from or the feeling of a sharp sword being driven into one's chest.
Sources: en.wikipedia.org
It is a synthetic peptide analog of human growth hormone-releasing hormone. It is used clinically to reduce excess visceral abdominal fat in adults with HIV-associated lipodystrophy. It works by stimulating pituitary growth hormone release.
Pivotal trials enrolled adults with HIV and excess visceral abdominal fat, often in the context of antiretroviral therapy. Participants were assessed mainly by computed tomography for visceral adipose tissue. The approved indication remains specific to that population.
Long-term effects on cardiovascular events, mortality, and sustained fat distribution are not well established. Most trials measured changes over months rather than years. Open questions also include whether benefits persist after treatment stops.
反相高效液相色谱用于分离和纯度评估，质谱用于分子量确认。肽图谱或串联质谱可进一步验证序列。具体方法需根据样品基质和监管要求选择。