The short version of 生长激素释放激素 fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2025-07-21 and is reviewed periodically as new material appears.
Tesamorelin binds to growth hormone-releasing hormone receptors on somatotroph cells in the anterior pituitary. Receptor activation increases intracellular cyclic AMP and promotes synthesis and secretion of growth hormone. Because the peptide mimics endogenous GHRH, it amplifies the normal pulsatile release of growth hormone rather than providing exogenous growth hormone directly. This upstream action distinguishes tesamorelin from recombinant growth hormone preparations and from growth hormone secretagogues that act at different receptors.
Stimulated growth hormone release leads to hepatic production of insulin-like growth factor 1, a key mediator of many growth hormone effects. In clinical studies, tesamorelin increased IGF-1 levels in a dose-dependent manner, although the response varies among individuals. The drug's effect on visceral fat is thought to involve growth hormone-mediated lipolysis and altered adipocyte metabolism. Muscle mass and lean body mass have also been assessed as secondary outcomes, but changes are generally smaller and less consistent than fat reductions.
Pharmacodynamic studies show that tesamorelin reduces visceral adipose tissue more than subcutaneous adipose tissue in the studied population. This selectivity may relate to differences in blood flow and hormone sensitivity between fat depots. Effects on glucose metabolism and insulin sensitivity have been investigated, with some trials reporting modest changes and others showing stability. The precise relationship between growth hormone exposure, IGF-1 levels, and visceral fat loss remains an active area of analysis.
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。
| Property | Value | Notes |
|---|---|---|
| Primary target | Growth hormone-releasing hormone receptor | Located on anterior pituitary somatotroph cells. |
| Receptor class | G protein-coupled receptor | Activation increases intracellular cyclic AMP. |
| Main downstream hormone | Growth hormone and insulin-like growth factor 1 | Growth hormone release precedes IGF-1 elevation. |
| Primary studied effect | Reduction in visceral adipose tissue | Measured by computed tomography in clinical trials. |
| Approximate half-life | 26–38 minutes after subcutaneous administration | Values vary by assay and study population. |
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。
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.
A documented effect of tesamorelin is a reduction in visceral adipose tissue in some study populations. Researchers have reported decreases in trunk fat measured by computed tomography alongside changes in lipid markers. The mechanism is thought to involve growth hormone-mediated lipolysis, though the precise contribution of direct versus indirect pathways is not fully resolved. Studies have generally examined defined groups over finite periods, so long-term outcomes are less well characterized. Findings have not been uniform across all trials.
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.
=== NMDA receptor === NMDA receptors are modulated by big dynorphin, producing effects that are antagonist-insensitive to opioid receptor blockade. Intracerebroventricular injection of big dynorphin produced memory enhancement in passive avoidance tests, enhanced locomotor activity in the open field test, and anxiolytic-like effects that were blocked by the NMDA receptor antagonist MK-801 but resistant to nor-BNI, a selective KOR antagonist. In contrast, dynorphin A and dynorphin B at similar doses produced analgesia (mediated by opioid receptors) but did not produce the NMDA-dependent memory enhancement, anxiolysis, or locomotor stimulation. Suggested mechanisms are interaction with the polyamine binding site or the NR2B subunit. The molecular basis for this atypical activity may involve the extended C-terminal region unique to big dynorphin, which contains multiple basic residues (arginine and lysine).
Generalmajor Walter Hörnlein - 1 April 1942 – 3 April 1943 Generalleutnant Hermann Balck - 3 April - 30 June 1943 Generalleutnant Walter Hörnlein - 30 June 1943 - 1 February 1944 Generalleutnant Hasso von Manteuffel - 1 February 1944 – August 1944 Generalmajor Karl Lorenz - 1 September 1944 - 7 May 1945
==== Indications for Gram-negative bacteria ==== When bacteriologic susceptibility testing (laboratory tests confirming the bacteria are sensitive to the drug) indicates appropriate susceptibility, doxycycline may be used to treat these infections caused by Gram-negative bacteria:
Urine replacement, which involves replacing dirty urine with clean urine from someone who is not taking banned substances. Urine replacement can be done by catheterization or with a prosthetic penis such as The Original Whizzinator. Diuretics, used to cleanse the system before having to provide a sample (which have also been placed in lists of banned substances themselves to circumvent this practice). Blood transfusions, which increase the blood's oxygen carrying capacity, in turn increasing endurance without the presence of drugs that could trigger a positive test result. To avoid being tested during training periods, athletes can make themselves unavailable. To mitigate this, athletes have to report their location at any time. If intended doping tests could not be done because the athlete could not be found, three times during a year, it's considered a doping violation, same as refusing a test. There is a website and a phone app, called ADAMS, in which athletes are expected to report their location.
Sources: en.wikipedia.org
With regard to extracting Bergamot oil from the fruit, the sfumatura or slow-folding process was the traditional technique for manually extracting the bergamot oil. In the 1840s the macchina calabrese (see image) was invented by Nicola Barillà. A few bergamots of similar size were placed between two metal cups. The lower cup was covered in spikes to hold the fruit still and the upper one was armed with sharp blades. The cups were rotated and the combination of pressure and movement of the upper cup caused oil and water to spray out of the fruit to be collected in a tin-lined copper bowl. The mixture of grated peel and oil would then be strained through woollen sacks. By more modern methods, the oil is extracted mechanically with machines called peelers, which scrape the outside of the fruit under running water to get an emulsion channeled into centrifuges for separating the essence from the water. The rinds of 100 bergamot oranges yield about 3 ounces (85 g) of bergamot oil.
=== Local names === In Japanese, it is known as goma-saba (胡麻鯖 sesame mackerel). In New Zealand, it is known by its Māori name tawatawa which is a cognate to kawakawa, kavakava and tavatava which are the respective Hawaiian, Tongan and Samoan names for Euthynnus affinis.
=== Mechanism of action === Labetalol is a beta blocker, or an antagonist of the β-adrenergic receptors. It is specifically a non-selective antagonist of the β1- and β2-adrenergic receptors. Labetalol has intrinsic sympathomimetic activity. It is also an antagonist of the α1-adrenergic receptor, and hence is additionally an alpha blocker. The antagonism of the adrenergic receptors by labetalol is competitive against other catecholamines and its actions on the receptors are potent and reversible. Labetalol acts by blocking α- and β-adrenergic receptors, resulting in decreased peripheral vascular resistance without significant alteration of heart rate or cardiac output. Labetalol is about equipotent in blocking β1- and β2-adrenergic receptors. The amount of α to β blockade depends on whether labetalol is administered orally or intravenously (IV). Orally, the ratio of α to β blockade is 1:3. Intravenously, α to β blockade ratio is 1:7. Thus, labetalol can be thought to be a beta blocker with some α-blocking effects. By comparison, labetalol is a weaker β-adrenergic receptor blocker than propranolol, and has a weaker affinity for α-adrenergic receptors compared to phentolamine. Labetalol's dual α- and β-adrenergic antagonism has different physiological effects in short- and long-term situations. In short-term, acute situations, labetalol decreases blood pressure by decreasing systemic vascular resistance with little effect on stroke volume, heart rate and cardiac output.
Sources: en.wikipedia.org
LNS is inherited in an X-linked recessive manner; the gene mutation is usually carried by the mother and passed on to her son, although one-third of all cases arise de novo (from new mutations) and do not have a family history. LNS is present at birth in baby boys. Most, but not all, persons with this deficiency have severe mental and physical problems throughout life. Cases in females are very rare. The symptoms caused by the buildup of uric acid (gout and kidney symptoms) respond well to treatment with medications such as allopurinol that reduce the levels of uric acid in the blood. The mental deficits and self-mutilating behavior do not respond well to treatment. There is no cure, but many affected people live to adulthood. Several new experimental treatments may alleviate symptoms.
On 14 May 2026, nine TTP militants and four military personnel were killed in a skirmish following an insurgent attack on Mena Army camp in Bajaur District. Militants attacked and killed an ambulance driver in Bannu. Aircraft activity and drones were reported over Kabul in the morning, followed by two large explosions and gunfire. On 15 May 2026, further drone activity, anti-aircraft fire and explosions were reported in Kabul, for the second consecutive night. On 16 May 2026, five militants including two commanders were killed under Operation Intiqam-e-Shuhada in retaliation for the suicide bombing targeting police, the week prior. On 18 May 2026, two policemen deployed to protect polio vaccination teams were killed by militants in Bajaur District. On 19 May 2026, Pakistan's Prime Minister Shahbaz Sharif reiterated that Operation Ghazab lil-Haq is "continuing with full resolve" and would remain continued, against Afghan Taliban regime and it's terrorist proxies, continuing to target their hideouts and infrastructure. After the statement, Pakistani forces conducted a clearance operation in Shewa, North Waziristan killing 22 TTP militants. Meanwhile, a policeman and a Federal Constabulary personnel were killed in separate attacks in Dera Ismail Khan and Tank districts. On 21 May 2026, two children were killed in a quadcopter strike in Bajaur District. Five TTP militants including a commander were killed by Pakistani forces in an operation in North Waziristan. On 22 May 2026, 19 JuA and 3 TTP militants were killed in interjihadist violence in Kurram District.
Despite the FFWHC's illustrations, Josephine Lowndes Sevely, in 1987, described the vagina as more of the counterpart of the penis. Concerning other beliefs about the clitoris, Hite (1976 and 1981) found that, during sexual intimacy with a partner, clitoral stimulation was more often described by women as foreplay than as a primary method of sexual activity, including orgasm. Further, although the FFWHC's work significantly propelled feminist reformation of anatomical texts, it did not have a general impact. Helen O'Connell's late 1990s research motivated the medical community to start changing the way the clitoris is anatomically defined. O'Connell describes typical textbook descriptions of the clitoris as lacking detail and including inaccuracies, such as older and modern anatomical descriptions of the female human urethral and genital anatomy having been based on dissections performed on elderly cadavers whose erectile (clitoral) tissue had shrunk. She instead credits the work of Georg Ludwig Kobelt as the most comprehensive and accurate description of clitoral anatomy. MRI measurements, which provide a live and multi-planar method of examination, now complement the FFWHC's, as well as O'Connell's, research efforts concerning the clitoris, showing that the volume of clitoral erectile tissue is ten times that which is shown in doctors' offices and anatomy textbooks.
However, the same article reported that CBT and fluoxetine outperformed treatment with only fluoxetine. Combining fluoxetine with CBT appeared to bring no additional benefit in two different studies or, at the most, only marginal benefit, in a fourth study. Behavior therapy for depression is sometimes referred to as behavioral activation. In addition, behavioral activation appears to take less time and lead to longer lasting change. Two well-researched treatment manuals include Social skills training for depression and Behavioral activation treatment for depression. A meta-analysis from 2023 showed that behavioral activation have a clinically meaningful effect on depression. Emotionally focused therapy, founded by Sue Johnson and Les Greenberg in 1985, treats depression by identifying and processing underlying emotions. The treatment manual, Facilitating emotional change, outlines treatment techniques. This kind of therapy assumes that our emotions have a strong connection to our sense of identity. It believes that if we are able to foster and understand our emotions, our sense of identity will be healed as a result. Acceptance and commitment therapy (ACT), a mindfulness form of CBT, which has its roots in behavior analysis, also demonstrates that it is effective in treating depression, and can be more helpful than traditional CBT, especially where depression is accompanied by anxiety and where it is resistant to traditional CBT.
Sources: en.wikipedia.org
It targets the growth hormone-releasing hormone receptor on pituitary somatotroph cells. Binding stimulates cyclic AMP signaling and growth hormone secretion. This is the same receptor used by endogenous GHRH.
It does not act directly on adipose tissue as a primary mechanism. Instead, it increases endogenous growth hormone, which then influences lipolysis and fat distribution. The reduction in visceral fat is an indirect pharmacodynamic effect.
Tesamorelin acts upstream at the pituitary to amplify natural pulsatile growth hormone release. Growth hormone injections provide exogenous hormone and bypass pituitary regulation. The two approaches therefore differ in feedback control and hormonal dynamics.
特沙莫瑞林是国际非专利名称，指一种经过 N 端修饰的生长激素释放激素类似物。它被归类为合成肽，序列与 GHRH(1-44) 密切相关。该名称不指代任何特定品牌或剂型。