tesamorelin comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Last reviewed on 2025-11-17. Where a claim depends on a specific study, the study is described rather than over-claimed.
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 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.
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.
| 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. |
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。
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。
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.
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.
== Chemical structure == Gaseous methylglyoxal has two carbonyl groups: an aldehyde and a ketone. In the presence of water, it exists as hydrates and oligomers. The formation of these hydrates is indicative of the high reactivity of MGO, which is relevant to its biological behavior.
The FDA also considered data from one separate trial (NCT01720446), which was sponsored by Novo Nordisk, of 3297 participants with type 2 diabetes who were at high risk for cardiovascular events. This trial was conducted in 20 countries: multiple European countries, Russia, Turkey, Brazil, Israel, Malaysia, Mexico, Thailand, Taiwan, Canada, and the United States. The participants were randomly assigned to receive semaglutide or placebo. Neither the participant nor the health care provider knew which treatment was being given. Treatment was given for 104 weeks (2 years), and the occurrence of cardiovascular events, including heart attacks, strokes, and hospitalization due to unstable angina (near heart attack) were recorded and compared in the two groups of participants.
Additionally, the titres of specific antibodies raised by DNA vaccination are lower than those obtained after vaccination with a recombinant protein. However, DNA immunization-induced antibodies show greater affinity to native epitopes than recombinant protein-induced antibodies. In other words, DNA immunization induces a qualitatively superior response. Antibodies can be induced after one vaccination with DNA, whereas recombinant protein vaccinations generally require a boost. DNA immunization can be used to bias the TH profile of the immune response and thus the antibody isotype, which is not possible with either natural infection or recombinant protein immunization. Antibody responses generated by DNA are useful as a preparative tool. For example, polyclonal and monoclonal antibodies can be generated for use as reagents.
Sources: en.wikipedia.org
In 2007, she appeared opposite Milla Jovovich in Resident Evil: Extinction, portraying Claire Redfield, who in the film, is the leader of a convoy of zombie apocalypse survivors going to Alaska in search of a safe haven. Her role sent her to Mexicali, Mexico for filming from May to late July, and required her hair to be dyed a light red. Speaking about her character Claire, Larter said, "She became the leader of this convoy. She's incredibly strong, patient. I think she serves a role for everyone within this convoy, let it be a mother to someone, a buddy, a best friend." Despite negative reviews, the film made $147 million worldwide. Also in the same year, she appeared with Hayes MacArthur in the comedy Homo Erectus and appeared as Evelyn Garland in the biographical drama Crazy, based on guitarist Hank Garland. Larter starred opposite Beyoncé and Idris Elba from London, in the Screen Gems-produced thriller Obsessed (2009). The film follows an office executive Derek Charles (Elba) whose marriage to Knowles' character Sharon is threatened by the aggressive interests of a co-worker Lisa Sheridan, portrayed by Larter. In an interview with Glam, Larter said that she "was excited to get the chance to play a femme fatale. I love playing women that are dark and vulnerable and sort of filled with a little bit of crazy emotion." While the film was released to mixed reviews, Larter was critically praised for her performance.
== External links == GeneReviews/NCBI/NIH/UW entry on Stickler Syndrome COL2A1 at Genetics Home Reference small deletion defects nucleotide substitutions Definition of COL2A1 Archived 2012-08-09 at the Wayback Machine GeneCard
==== Hyaluronic acid ==== Hyaluronic acid (or "hyaluronan") is a polysaccharide consisting of alternating residues of D-glucuronic acid and N-acetylglucosamine, and unlike other GAGs, is not found as a proteoglycan. Hyaluronic acid in the extracellular space confers upon tissues the ability to resist compression by providing a counteracting turgor (swelling) force by absorbing significant amounts of water. Hyaluronic acid is thus found in abundance in the ECM of load-bearing joints. It is also a chief component of the interstitial gel. Hyaluronic acid is found on the inner surface of the cell membrane and is translocated out of the cell during biosynthesis. Hyaluronic acid acts as an environmental cue that regulates cell behavior during embryonic development, healing processes, inflammation, and tumor development. It interacts with a specific transmembrane receptor, CD44.
Sources: en.wikipedia.org
=== Termination of Cuban medical mission === On 13 February, the Guatemalan health ministry announced it would begin a "phased withdrawal of the Cuban Medical Brigade". The decision was linked to pressure from the U.S., which has called the Cuban medical mission "forced labor". Income earned by doctors serving in foreign countries is an important source of revenue for the Cuban government. In February, Honduras announced that it was ending the Cuban medical mission. The Bahamas, Antigua and Barbuda, and Grenada have also said they would reduce use of Cuban healthcare workers. U.S. diplomat Mike Hammer pressured the government of Calabria to end their reliance on Cuban medical staff. President of Calabria Roberto Occhiuto said that Cuban doctors were necessary "to keep hospitals and emergency rooms open" in the region, but that he would consider alternatives to hiring more Cuban doctors. Occhiuto denied the U.S. argument that the program was human trafficking.
Chemist James Young in 1847 noticed a natural petroleum seepage in the coal mine at Riddings, Derbyshire, from which he distilled a light thin oil suitable for use as lamp oil, at the same time obtaining a more viscous oil suitable for lubricating machinery. In 1848, Young set up a small business refining crude oil. Young eventually succeeded (by distilling cannel coal at low heat) in creating a fluid resembling petroleum, which when treated in the same way as the seep oil gave similar products. Young found that by slow distillation he could obtain several useful liquids from it, one of which he named "paraffine oil" because at low temperatures it congealed into a substance resembling paraffin wax. The production of these oils and solid paraffin wax from coal formed the subject of his patent dated October 17, 1850. In 1850, Young & Meldrum and Edward William Binney entered into partnership under the title of E.W. Binney & Co. at Bathgate in West Lothian and E. Meldrum & Co. at Glasgow; their works at Bathgate were completed in 1851 and became the first truly commercial oil-works in the world with the first modern oil refinery. The demand for petroleum as a fuel for lighting in North America and around the world quickly grew. The first oil well in the Americas was drilled in 1859 by Edwin Drake at what is now called the Drake Well in Cherrytree Township, Pennsylvania. There also was a company associated with it, and it sparked an oil boom and rapid expansion of the global petroleum industry. The same year, engine-drilled wells appeared in West Virginia.
=== Interaction with cellular proteins === Localization of CK1δ to certain subcellular compartments can furthermore be initiated by its interaction with cellular proteins. In order to mediate interaction with CK1δ appropriate docking motifs need to be present in the respective proteins. Docking motif Phe-X-X-X-Phe has been identified in NFAT, β-catenin, PER, and proteins of the FAM83 family. As an example, nuclear CK1δ can be localized to nuclear speckles by its interaction with FAM83H. Another interaction motif is represented by the sequence Ser-Gln-Ile-Pro, which is present in microtubule plus-end-binding protein 1 (EB1). Numerous interaction partners for CK1δ have been described within recent years, forming strong interactions with CK1δ and therefore being more than simple substrate proteins. As mentioned above, interactions with CK1δ have been shown for AKAP450 and DDX3X. By initially performing yeast two-hybrid screens, interaction could also be confirmed for the Ran-binding protein in the microtubule-organizing center (RanBPM), microtubule-associated protein 1A, and snapin, a protein associated with neurotransmitter release in neuronal cells. Interactions with CK1δ have also been detected for the development-associated factors LEF-1 (lymphocyte enhancer factor-1) and the proneural basic helix-loop-helix (bHLH) transcription factor Atoh1. Finally, interaction of CK1δ with PER and CRY circadian clock proteins have been demonstrated, facilitating nuclear translocation of PERs and CRYs.
=== Minimum wages === In May 2026, the Karnataka government revised minimum wages by approximately 60 percent across 81 scheduled sectors. Under the revised structure, the minimum monthly wage for unskilled workers in the Greater Bengaluru area was reported at ₹23,376, while highly skilled workers were entitled to ₹31,114. Rates elsewhere in Karnataka ranged between ₹19,300 and ₹21,251 depending on location and category. Lad described the revision as a long-standing demand of the labour community and said the revised framework was intended to provide greater economic security to workers in the unorganized and specified sectors.
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.
It mirrors the 44-residue form of human growth hormone-releasing hormone. A hexenoyl group on the N-terminal tyrosine distinguishes it from the unmodified hormone. The change is intended to improve resistance to enzymatic breakdown.