The short version of GHRH analog fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-08-01. Anything still debated is marked as such rather than presented as settled.
Tesamorelin occupies a narrow position among agents that act on the growth hormone axis. Unlike growth hormone itself, which is given as replacement, it stimulates the pituitary to release the hormone in pulses, so the downstream increase in insulin-like growth factor 1 depends on intact somatotroph function. Other peptides in the same family include shorter GHRH fragments and synthetic secretagogues with different stability profiles. Several points remain unresolved, including whether the reduction in visceral fat translates into fewer cardiovascular events, what happens to metabolic markers after long-term use, and how the drug compares with lifestyle or surgical approaches.
Tesamorelin is a synthetic peptide that belongs to the growth hormone-releasing hormone family and contains the same forty-four amino acid sequence as endogenous GHRH, extended at the amino terminus by a trans-3-hexenoyl group. That small fatty acid modification protects the peptide from rapid cleavage by dipeptidyl peptidase-4, the enzyme that shortens the half-life of native GHRH to only a few minutes. Chemically the compound is produced by solid-phase peptide synthesis, purified by chromatography, and supplied as a sterile lyophilized powder for reconstitution.
Regulatory approval in the United States came in 2010, when the Food and Drug Administration cleared the peptide for the reduction of excess abdominal fat in adults with HIV infection and associated lipodystrophy. The decision rested mainly on two randomized phase 3 trials that enrolled roughly eight hundred patients and ran for twenty-six weeks. Participants receiving active drug showed substantially greater declines in visceral adipose tissue than those receiving placebo, while total body weight changed comparatively little. A reformulated presentation was later approved, and the product has remained a niche therapy rather than a general weight-loss agent.
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.
| Property | Value | Notes |
|---|---|---|
| Peptide class | Synthetic GHRH analogue | 44 residues; N-terminal trans-3-hexenoyl group |
| First approval year | 2010 | United States; HIV-associated abdominal fat accumulation |
| Administration route | Subcutaneous injection | Abdominal site; clinician-administered or self-injected |
| Common synonyms | TH9507; tesamorelin acetate | Development code and acetate salt form |
| Originator | Canadian biotechnology firm | Original developer and regulatory sponsor |
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。
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.
== Osmium isotopes in radiometric dating == The isotopic ratio of osmium-187 and osmium-188 (187Os/188Os) can be used as a window into geochemical changes throughout the ocean's history. The average marine 187Os/188Os ratio in oceans is 1.06. This value represents a balance of the continental riverine inputs of Os with a 187Os/188Os ratio of ~1.3, and the mantle/extraterrestrial inputs with a 187Os/188Os ratio of ~0.13. The lighter isotope, 187Os, is produced by beta decay of 187Re. This decay has actually increased the 187Os/188Os ratio of the bulk silicate earth (Earth less the core) by 33%. The difference between crust and mantle ratios is explained this way: crustal rocks have a much higher level of rhenium. Re is concentrated in the crust relative to the mantle due to partial melting of the mantle (differentiation). Because Re is partitioned into the melt more than other PGEs, it increases in the crust over time.}, which produces an excess of 187Os. The combined input of the two sources to the marine environment results in the observed ratio in the oceans, and has fluctuated over the geologic history. These changes in the isotopic values of marine Os can be observed in the marine sediment that is deposited, and eventually lithified in that time period. This allows for researchers to estimate weathering fluxes, flood basalt volcanism, and impact events that may have caused some of our largest mass extinctions. The marine sediment Os isotope record has corroborated the K-T boundary impact, for example.
== Examples == Numerous endogenous compounds – including hormones, catecholamines such as dopamine and noradrenaline, and many trace amines (e.g. adrenaline, phenethylamine itself, tyramine, thyronamine, and iodothyronamine) – are substituted phenethylamines. Several notable recreational drugs, such as MDPV (Monkey Dust), MDMA (ecstasy), mescaline, methamphetamine, and cathinone, are also members of the class. Many well-known prescription drugs are from the phenylethylamine class such as Adderall which uses Amphetamine, Desoxyn which uses methamphetamine, and Sudafed which uses pseudoephedrine.
In more recent years, the party has attempted to win votes from Black South Africans and as a result, Black support for the DA has risen over the past several years, going from 1% to 6%. The DA is a liberal party that favours free-market policies. The DA was allotted 89 seats in parliament after the 2014 general election, but the party's seat total decreased to 84 seats following the 2019 general election. The DA has been part of the government of South Africa since the 2024 general election, having joined the Government of National Unity (GNU), and President Cyril Ramaphosa's Third Cabinet. The DA stated that one of its main aims for joining the GNU was keeping rival parties EFF and MK out of the government; a goal which was achieved as per the eventual composition of the GNU. As of May 2025, the party holds 6 ministry seats, and 6 deputy ministry seats in parliament. Economic Freedom Fighters The EFF emerged eight months before the 2014 general election and won 25 seats in parliament. After the 2019 general elections, the EFF increased their seats in parliament to 44, the only party of the top three parties that achieved an increase of members in parliament. The EFF is a far-left revolutionary socialist political party, advocating for land expropriation and for an end to corruption within parliament. Inkatha Freedom Party The IFP, which was formed in 1990 was the successor to the former government in the now-defunct Kwazulu Bantustan, traditionally draws its support from the Zulu people. It has however made inroads into the minority electorate of Whites and Indians.
==== Contamination of water supply ==== In 2005, the water supply to the city of Harbin in China with a population of almost nine million people, was cut off because of a major benzene exposure. Benzene leaked into the Songhua River, which supplies drinking water to the city, after an explosion at a China National Petroleum Corporation (CNPC) factory in the city of Jilin on 13 November 2005. When plastic water pipes are subject to high heat, the water may be contaminated with benzene.
Sources: en.wikipedia.org
The polymerase chain reaction (PCR) is a laboratory method widely used to amplify copies of specific DNA sequences rapidly, to enable detailed study. PCR was invented in 1983 by American biochemist Kary Mullis at Cetus Corporation. Mullis and biochemist Michael Smith, who had developed other essential ways of manipulating DNA, were jointly awarded the Nobel Prize in Chemistry in 1993. PCR is fundamental to many of the procedures used in genetic testing, research, including analysis of ancient samples of DNA, and identification of infectious agents. Using PCR, copies of very small amounts of DNA sequences are exponentially amplified in a series of cycles of temperature changes. PCR is now a common and often indispensable technique used in medical laboratory research for a broad variety of applications including biomedical research and forensic science. The majority of PCR methods rely on thermal cycling. Thermal cycling exposes reagents to repeated cycles of heating and cooling to permit different temperature-dependent reactions—specifically, DNA melting and enzyme-driven DNA replication. PCR employs two main reagents—primers (which are short single strand DNA fragments known as oligonucleotides that are a complementary sequence to the target DNA region) and a thermostable DNA polymerase. In the first step of PCR, the two strands of the DNA double helix are physically separated at a high temperature in a process called nucleic acid denaturation. In the second step, the temperature is lowered and the primers bind to the complementary sequences of DNA.
== History == Omaveloxolone is a second generation member of the synthetic oleanane triterpenoid compounds and in clinical development by Reata Pharmaceuticals. Preclinical studies have demonstrated that omaveloxolone possesses antioxidative and anti-inflammatory activities and the ability to improve mitochondrial bioenergetics. Omaveloxolone is under clinical investigation for a variety of indications, including Friedreich's ataxia, mitochondrial myopathies, immunooncology, and prevention of corneal endothelial cell loss following cataract surgery. The efficacy and safety of omaveloxolone was evaluated in a 48-week randomized, placebo-controlled, and double-blind study [Study 1 (NCT02255435)] and an open-label extension. Study 1 enrolled 103 individuals with Friedreich's ataxia who received placebo (52 individuals) or omaveloxolone 150 mg (51 individuals) for 48 weeks. Of the research participants, 53% were male, 97% were white, and the mean age was 24 years at study entry. Nine (18%) patients were younger than age 18. The primary objective was to evaluate the change in the modified Friedreich's Ataxia Rating Scale (mFARS) score compared to placebo at week 48. The mFARS is a clinical assessment that measures disease progression, namely swallowing and speech (bulbar), upper limb coordination, lower limb coordination, and upright stability. Individuals receiving omaveloxolone performed better on the mFARS than people receiving placebo.
==== Pollybeak ==== The "pollybeak" deformity, characterized by excessive supratip fullness usually involving a cartilaginous hump or loss of tip projection, is the indication for approximately 50% of all revision rhinoplasties. If too much of the osseo-cartilaginous framework is removed, the consequent weakening can cause the external nasal skin to become shapeless, resulting in a "pollybeak" deformity, resembling the beak of a parrot.
=== OpenTag === DASH7 Mode 2 developers benefit from the open-source firmware library called OpenTag, which provides developers with a "C"-based environment in which to develop DASH7 applications quickly. So in addition to DASH7 (ISO 18000-7) being an open source, ISO standard, OpenTag is an open-source stack that is quite unlike other wireless sensor networking (e.g. ZigBee) and active RFID (e.g. proprietary) options elsewhere in the marketplace today. Even though OpenTag is an open-source project, people may not be able to use it free of charge. As of August 2015, there is no evidence to suggest that OpenTag bears a royalty, although current versions of OpenTag license Archived 2013-12-31 at the Wayback Machine do include a provision permitting RAND licensing.
During the Medellín Cartel's war against the Colombian government, both the Norte del Valle Cartel and Cali Cartel formed and operated a vigilante group called Los Pepes (which also comprised members of the Colombian government, police and former members of the Medellín Cartel) to bring about the downfall of Pablo Escobar; they did so by bombing the properties of the Medellín Cartel and kidnapping, torturing and killing Escobar's associates as well as working alongside the Search Bloc, which would eventually lead to the dismantling of the Medellín Cartel and the death of Pablo Escobar. Because of the high levels of corruption, the Oficina de Envigado would do things to help the police and vice versa, to the point where the police and the cartel would sometimes do operations together against other criminals; additionally the leaders of La Oficina would often act as judges to mediate disputes between the various different drug gangs throughout Colombia, which according to some helped prevented a lot of disputes from turning violent. On Somalia coastline many people rely on fishing for economic survival, because of this Somali pirates are often known to attack foreign vessels who partake in illegal fishing and overfishing in their waters and vessels that illegally dump waste into their waters. As a result, marine biologists say that the local fishery is recovering.
Sources: en.wikipedia.org
It is a laboratory-made peptide of forty-four amino acids whose sequence matches human growth hormone-releasing hormone, with a modified amino terminus. The modification is a short unsaturated fatty acid chain attached to the first residue. This change slows enzymatic breakdown and lengthens the time the peptide stays active in circulation.
The clinical program was designed around HIV-associated lipodystrophy, a condition in which fat accumulates abnormally around the internal organs. Trials enrolled that specific population, so the evidence base covers it rather than the general population. Regulators approved the drug for the studied indication only, and promotion outside it is not permitted.
Growth hormone therapy supplies the finished hormone directly, while this peptide acts upstream and asks the pituitary to secrete its own. That difference means the response depends on a functioning pituitary and on the body's normal feedback loops. It also means the circulating hormone profile is pulsatile rather than a flat, injected level.
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.