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Last reviewed on 2025-08-25. Where a claim depends on a specific study, the study is described rather than over-claimed.
Tesamorelin is a synthetic peptide that belongs to the growth hormone-releasing hormone (GHRH) family. Its sequence corresponds to the fully active 44-amino-acid form of human GHRH, with a single structural modification: the addition of a trans-3-hexenoyl group at the N-terminus. That modification is not found in the naturally occurring hormone and was introduced deliberately during development to improve stability against enzymatic degradation. The compound is therefore best described as a stabilized analogue rather than a naturally occurring peptide.
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.
tesamorelin 是一种人工合成的四十四肽，序列与内源性生长激素释放激素（GHRH）的 1-44 片段一致，区别在于 N 端加接了一个反式-3-己烯酰基。该修饰抑制二肽基肽酶 IV 的快速切割，从而延长分子在循环中的存留时间。作为肽类分子，它难以经胃肠道吸收，文献中讨论的均是注射途径。分类上通常把它归为 GHRH 类似物，以区别于生长激素本身。
作用位置在垂体前叶。tesamorelin 与 GHRH 受体结合后激活腺苷酸环化酶，升高细胞内 cAMP，再经蛋白激酶 A 通路促进生长激素的合成与释放。由于它作用于内源调控节点，生长激素仍以脉冲方式分泌，而不是被持续抬升到固定水平。生长激素随后在肝脏等组织诱导胰岛素样生长因子 1 产生，构成完整的生长激素轴响应。
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C221H366N72O67S | Reflects a 44-residue peptide with one N-terminal modification |
| Approximate molecular weight | 5136 Da | Sequence length and single acyl group determine the mass |
| Appearance | White to off-white lyophilized powder | Typical form of a purified synthetic peptide |
| Solubility class | Soluble in water and aqueous buffer | Peptide backbone favors aqueous dissolution |
| Common synonyms | GHRH(1-44) analogue; Egrifta | Descriptive name and approved brand name |
Tesamorelin is a synthetic peptide built from 44 amino acids and classified with the growth hormone–releasing hormone family. Its sequence corresponds to the human GHRH(1-44) backbone, carrying one structural change at the amino terminus. That change is a trans-3-hexenoyl group placed where the natural peptide would have an unmodified end. The modification is the feature that separates the compound from the endogenous hormone in name, in stability, and in how it is handled in the laboratory.
The hexenoyl cap slows the enzyme step that trims the amino terminus of native GHRH, the same step that shortens its active lifetime in circulation. As a result, the modified peptide persists longer in plasma than the unmodified hormone in side-by-side comparison. Receptor activity stays broadly comparable, because the added group sits away from the residues that contact the binding site. This combination, preserved receptor activity with reduced degradation, explains why the analog was developed instead of the native sequence.
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.
"Tetrachlorodecaoxide" (TCDO) is a chlorite-containing substance with claimed immunomodulatory, macrophage-activating properties. WF10 (Macrokine, Immunokine, Oxoferin) is an aqueous solution of tetrachlorodecaoxide designed for intravenous injection. Tetrachlorodecaoxide/WF10 were originally developed by Oxo Chemie. The chemical formula is given as Cl4H2O114-. This incomplete formula shows a mixture of chlorite ion, water, and molecular oxygen: "Cl4H2O114-" = 4ClO2− + H2O + O2. Oxoferin was found to be equivalent with aqueous sodium chlorite. Tetrachlorodecaoxide / WF10 is used in the management of radiation cystitis, is effective in the treatment of diabetic foot ulcers, and is used in wound healing, where the mechanism of action is activation of the macrophage system, and increasing the partial pressure of oxygen in the wound.
=== Terminal === Memphis International Airport has one terminal with a Y-shaped concourse. There are 23 gates on the central stem and southeastern leg of the concourse. All international flights that are not precleared at the departure airport are processed on the southwestern leg. The terminal was built in 1963, and by the 1970s it had three concourses. The west concourse was labeled A, the middle one B, and the east one C. As of 2013, the year that the Delta hub closed, the terminal had over 70 gates. When the refurbished Concourse B began operations in 2022, all flights were consolidated there and the other two concourses closed. The demolition of Concourse A started in 2025.
Abacus – The Aztec and Maya of Mesoamerica performed arithmetic operations using an abacus. It served as a more accurate and faster alternative to a written solution or relying on memory. Archaeologists have recorded the Mesoamerican abacus, or Nepohualtzintzin, as being present in Mesoamerica from at least between 900 and 1000 CE. Abstract art – Abstract art was used by nearly all societies of North and South America. Members of European art world believed tribal art was "primitive" until the 1890s when it served as inspiration for the modern American abstract art movement. See also Visual arts by indigenous peoples of the Americas.
Sources: en.wikipedia.org
This is a list of notable restaurant chains in Australia. A restaurant chain is a set of related restaurants with the same name in many different locations that are either under shared corporate ownership (e.g., McDonald's in the U.S.) or franchising agreements. Typically, the restaurants within a chain are built to a standard format through architectural prototype development and offer a standard menu and/or services.
=== US marketing scheme === In the 1980s, the Jerusalem artichoke also gained some notoriety when its seeds were planted by Midwestern US farmers at the prodding of an agricultural attempt to save the family farm. This effort aimed to teach independent farmers to raise their own food, feed, and fuel. Little market existed for the tuber in that part of the US then, but contacts were made with sugar producers, oil and gas companies, and the fresh food market for markets to be developed. Fructose had not yet been established as a mainstay, nor was ethanol used as a main fuel additive as it is today. The only real profit in this effort was realized by a few first-year growers (who sold some of their seed to other farmers individually as well as with the help of the company attempting this venture). As a result, many of the farmers who had planted large quantities of the crop lost money.
=== Arizona State University === In June 2014, Starbucks announced a partnership with Arizona State University (ASU) that would allow Starbucks employees in their Junior and Senior years of college to complete four years of college at Arizona State University's online program for only around US$23,000. Starbucks employees admitted into the program would receive a scholarship from the college, that would cover 44% of their tuition. The remaining balance and all other expenses would be paid by the student or through traditional financial aid. In April 2015, Starbucks and ASU announced an expansion of the College Achievement Program. The program would now allow all eligible part-time and full-time employees working in a U.S. Starbucks to enroll in the program for full-tuition reimbursement. After the completion of each semester, Starbucks reimburses the student their portion of the tuition. The student can then use the reimbursement to pay any loans or debt incurred during the semester.
Sources: en.wikipedia.org
== Sources == Collingham, Lizzie (2006) [2005 (Chatto & Windus)]. Curry: A Tale of Cooks and Conquerors. London: Vintage Books. ISBN 978-0-099-43786-4. Smith, Andrew F. (1994). The Tomato in America: Early History, Culture, and Cookery. Columbia, South Carolina: University of South Carolina Press. ISBN 978-1-57003-000-0.
If arterial/venous is not specified for an acid–base or blood gas value, then it generally refers to arterial, and not venous which otherwise is standard for other blood tests. Acid–base and blood gases are among the few blood constituents that exhibit substantial difference between arterial and venous values. Still, pH, bicarbonate and base excess show a high level of inter-method reliability between arterial and venous tests, so arterial and venous values are roughly equivalent for these.
=== Oxanorbornadiene cycloaddition === The oxanorbornadiene cycloaddition is a 1,3-dipolar cycloaddition followed by a retro-Diels Alder reaction to generate a triazole-linked conjugate with the elimination of a furan molecule. Preliminary work has established its usefulness in peptide labeling experiments, and it has also been used in the generation of SPECT imaging compounds. More recently, the use of an oxanorbornadiene was described in a catalyst-free room temperature "iClick" reaction, in which a model amino acid is linked to the metal moiety, in a novel approach to bioorthogonal reactions.
Sources: en.wikipedia.org
It shares the 44-residue sequence of human GHRH but carries an added trans-3-hexenoyl group at its N-terminus. That addition does not occur in the natural hormone and serves mainly to resist enzymatic breakdown. The receptor target and signaling pathway remain the same.
It binds the growth hormone-releasing hormone receptor on anterior pituitary cells. Activation of that receptor promotes synthesis and release of growth hormone. The effect propagates through the growth hormone and insulin-like growth factor 1 axis.
Native GHRH is cleared quickly by peptidases, which limits how long it can stimulate its receptor. The added group hinders one of the primary cleavage enzymes. The practical consequence is a longer period of receptor activity per dose.
tesamorelin 属 GHRH 类似物，作用于垂体受体以促进内源生长激素释放；生长激素本身是直接补充的外源激素。两者在给药逻辑、作用位点和反馈调控路径上并不相同。