This is a working overview of hexenoyl group, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2025-08-26 and is reviewed periodically as new material appears.
Metabolic interest in this compound centers on fat distribution rather than on hormone levels alone. Imaging trials in adults with excess abdominal fat report reductions in visceral adipose tissue, while subcutaneous depots change comparatively little. Growth hormone and IGF-1 are presumed to carry the effect, but the separate contribution of each is not firmly established. Whether these changes persist after treatment stops, and whether they alter longer-term health outcomes, remain open questions that published work does not answer consistently.
Tesamorelin is a synthetic peptide of forty-four amino acids whose sequence reproduces human growth hormone-releasing hormone. Its distinguishing feature sits at the amino terminus, where a trans-3-hexenoyl group replaces the free amine. That acylation slows cleavage by dipeptidyl peptidase IV, an enzyme that otherwise removes the first two residues and inactivates the natural hormone quickly. The modified peptide therefore persists longer in circulation while keeping the same receptor target. It is handled as a lyophilized solid and dissolved shortly before use.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular class | Synthetic 44-residue peptide | GHRH analog backbone |
| Approximate molecular mass | 5136 Da | Varies with counterion and hydration state |
| N-terminal group | trans-3-hexenoyl | Increases resistance to dipeptidyl peptidase IV |
| Primary receptor | GHRH receptor (GHRHR) | Class B G protein-coupled receptor on somatotrophs |
| Principal mediator | IGF-1 | Rises indirectly after growth hormone release |
监管记录显示，特沙莫瑞林于 2010 年在美国首次获得批准，用于人类免疫缺陷病毒感染相关的脂肪营养不良患者。批准依据来自降低内脏脂肪的临床试验，而非体重或瘦体重的普遍改善。后续出现了不同制剂版本，但其核心适应症保持一致。关于长期心血管结局和死亡率影响，现有证据仍不充分。
在临床研究之外，特沙莫瑞林常被讨论为生长激素分泌促进剂，但这一说法需要限定。它并不等同于生长激素本身，也不属于普通减重药物。部分研究关注其减少腹部脂肪和改善脂质谱的潜力，另一些研究则关注胰岛素抵抗和 IGF-1 升高等信号。这些效应的临床意义仍在评估中，尚未形成统一结论。
特沙莫瑞林是一种合成肽，其序列与人生长激素释放激素的 44 个氨基酸形式相关。它在 N 端带有反式-3-己烯酰基修饰，这一改动可减缓二肽基肽酶 IV 的降解。该化合物属于生长激素释放激素受体激动剂，可刺激垂体释放生长激素。研究文献通常将其归入合成肽类药物，而非小分子化合物。
研究背景集中在特定人群的体成分改变，尤其是与脂肪分布异常相关的内脏脂肪堆积。不同地区对它的监管状态与获批适应症并不一致，部分市场仅限特定诊断人群使用。在一般人群中的长期效应、与其他激素的相互作用以及停药后的维持情况仍属开放问题，现有数据不足以给出普遍结论。
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。
==== Cyclooxygenases ==== Prostaglandins are produced following the sequential oxygenation of arachidonic acid, DGLA or EPA by cyclooxygenases (COX-1 and COX-2) and terminal prostaglandin syntheses. The classic dogma is as follows:
Patients may be advised to limit alcohol consumption, stop smoking, and practice good dental hygiene. It is also advised for individuals who take bisphosphonates to never allow the tablet to dissolve in the mouth as this causes damage to the oral mucosa.
Thus, the two substrates of this enzyme are isopregnanolone and oxidised nicotinamide adenine dinucleotide phosphate (NADP+). Its products are 5α-dihydroprogesterone, reduced NADPH, and a proton. This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is 3β-hydroxy-5α-steroid:NADP+ 3-oxidoreductase.
== Adverse effects == Urea can be irritating to skin, eyes, and the respiratory tract. Repeated or prolonged contact with urea in fertilizer form on the skin may cause dermatitis. High concentrations in the blood can be damaging. Ingestion of low concentrations of urea, such as are found in typical human urine, are not dangerous with additional water ingestion within a reasonable time-frame. Many animals (e.g. camels, rodents or dogs) have a much more concentrated urine which may contain a higher urea amount than normal human urine. Urea can cause algal blooms to produce toxins, and its presence in the runoff from fertilized land may play a role in the increase of toxic blooms. The substance decomposes on heating above melting point, producing toxic gases, and reacts violently with strong oxidants, nitrites, inorganic chlorides, chlorites and perchlorates, causing fire and explosion.
=== Sewage treatment === In the process of sewage treatment, sewage is digested by enzymes secreted by bacteria. Solid organic matters are broken down into harmless, soluble substances and carbon dioxide. Liquids that result are disinfected to remove pathogens before being discharged into rivers or the sea or can be used as liquid fertilizers. Digested solids, known also as sludge, is dried and used as fertilizer. Gaseous byproducts such as methane can be utilized as biogas to fuel electrical generators. One advantage of bacterial digestion is that it reduces the bulk and odor of sewage, thus reducing space needed for dumping. The main disadvantage of bacterial digestion in sewage disposal is that it is a very slow process.
Sources: en.wikipedia.org
The Federal Assembly of Yugoslavia, representing the FR Yugoslavia (1992–2003) was composed of two chambers: the Council of Citizens and the Council of Republics. Whereas the Council of Citizens served as an ordinary assembly, representing the people, the Council of Republics was made equally by representatives from the federation's constituent republics, to ensure federal equality between Serbia and Montenegro. The first president from 1992 to 1993 was Dobrica Ćosić, a former communist Yugoslav partisan during World War II and later one of the fringe contributors of the controversial Memorandum of the Serbian Academy of Sciences and Arts. Despite being head of the country, Ćosić was forced out of office in 1993 due to his opposition to Serbian President Slobodan Milošević. Ćosić was replaced by Zoran Lilić who served from 1993 to 1997, and then followed by Milošević becoming Yugoslav President in 1997 after his last legal term as Serbian president ended in 1997. The FR Yugoslavia was dominated by Milosevic and his allies, until the presidential election in 2000. There were accusations of vote fraud and Yugoslav citizens took to the streets and engaged in riots in Belgrade demanding that Milošević be removed from power. Shortly afterwards Milošević resigned and Vojislav Koštunica took over as Yugoslav president and remained president until the state's reconstitution as the State Union of Serbia and Montenegro.
=== Gastrointestinal decontamination === In adults, the initial treatment for paracetamol overdose is gastrointestinal decontamination. Paracetamol absorption from the gastrointestinal tract is complete within two hours under normal circumstances, so decontamination is most helpful if performed within this timeframe. Gastric lavage, better known as stomach pumping, may be considered if the amount ingested is potentially life-threatening and the procedure can be performed within 60 minutes of ingestion. Administration of activated charcoal is the most common gastrointestinal decontamination procedure as it efficiently adsorbs paracetamol, thereby reducing its gastrointestinal absorption. Administering activated charcoal also poses less risk of aspiration than gastric lavage. It appears that the most benefit from activated charcoal is gained if it is given within 30 minutes to two hours of ingestion. Administering activated charcoal later than 2 hours can be considered in patients that may have delayed gastric emptying due to co-ingested drugs or following ingestion of sustained- or delayed-release paracetamol preparations. Activated charcoal should also be administered if co-ingested drugs warrant decontamination. There was reluctance to give activated charcoal in paracetamol overdose, because of the concern that it may also absorb the oral antidote acetylcysteine. Studies have shown that 39% less acetylcysteine is absorbed into the body when they are administered together.
=== Other drugs === Various other types of drugs have also been found to produce hypnotic-type effects in scientific research. Examples include histamine H3 receptor agonists like α-methylhistamine, BP 2.94, GT-2203 (VUF-5296), and SCH-50971, adenosine A1 and A2A receptor agonists like adenosine and YZG-331, and dopamine D1 receptor receptor antagonists like NNC 01-0687 (ADX-10061, CEE-03-310, NNC-687). Pellotine, a tetrahydroisoquinoline alkaloid found in Lophophora cacti species such as Lophophora diffusa (false peyote) and Lophophora williamsii (peyote), is a hypnotic that was previously marketed in Europe in the 1890s but was abandoned once cheaper barbiturates were introduced the next decade. It has been identified as a selective and potent serotonin 5-HT6 receptor weak partial agonist, serotonin 5-HT7 receptor inverse agonist, and serotonin 5-HT1D receptor ligand, with one or more of these actions possibly involved in its sedative and hypnotic effects. Tributyrin, a triglyceride (fat) and precursor or prodrug of butyric acid (butyrate), a short-chain fatty acid and major product of beneficial gut bacteria, has been found to increase slow wave sleep (SWS) and deep sleep in rodents and humans.
== D == DE(T)A – Dielectric thermal analysis dHvA – De Haas–van Alphen effect DIC – Differential interference contrast microscopy Dielectric spectroscopy DLS – Dynamic light scattering DLTS – Deep-level transient spectroscopy DMA – Dynamic mechanical analysis DPI – Dual polarisation interferometry DRS – Diffuse reflection spectroscopy DSC – Differential scanning calorimetry DTA – Differential thermal analysis DVS – Dynamic vapour sorption
Sources: en.wikipedia.org
The amino acid sequence matches human growth hormone-releasing hormone, but the amino terminus carries a trans-3-hexenoyl group instead of a free amine. That single structural change chiefly affects enzymatic stability rather than receptor selectivity.
Growth hormone released from the pituitary stimulates IGF-1 production in the liver and other tissues, so circulating IGF-1 generally rises during exposure. The size of the rise varies between individuals and depends on baseline hormonal status and other concurrent factors.
Reported imaging studies focus on visceral adipose tissue, where reductions are more consistently observed across trials. Subcutaneous depots show smaller and less reproducible changes, so the two compartments should not be treated as equivalent.
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.