The short version of incretin fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-05-13 and is reviewed periodically as new material appears.
Clinical development has progressed through phase 2 trials in adults with obesity and type 2 diabetes, with phase 3 programs reported as ongoing. Reported outcomes include reductions in body weight and improvements in glycemic measures over defined treatment periods. Whether these effects translate into durable benefits after treatment ends remains an open question. Long-term safety data across broad populations are not yet complete, and regulatory decisions have not been announced.
Retatrutide is an investigational synthetic peptide engineered to activate three distinct hormone receptors within a single molecule. It targets the glucose-dependent insulinotropic polypeptide receptor, the glucagon-like peptide-1 receptor, and the glucagon receptor simultaneously. This triagonist design distinguishes it from earlier incretin-based compounds that act on one or two of these pathways. Structural modifications relative to native gut hormones extend its residence time in circulation. The molecule remains under clinical evaluation and is not approved for any indication.
Receptor activation produces downstream effects that differ by tissue. GLP-1 receptor signaling influences appetite regulation and insulin secretion in a glucose-dependent manner. GIP receptor activity contributes to metabolic handling of nutrients and may modulate adipose tissue. Glucagon receptor engagement raises energy expenditure and promotes hepatic lipid turnover, though the balance among these actions in humans is still being characterized. Preclinical models showed reductions in body weight and improved glycemic markers.
Quantification of the peptide in biological samples generally relies on liquid chromatography coupled with tandem mass spectrometry. This approach separates the analyte from matrix components and detects it by mass-to-charge transitions specific to the molecule. Immunoassays offer higher throughput but can cross-react with related peptides and metabolites, so mass spectrometric methods are preferred when structural confirmation is required. Method validation typically addresses accuracy, precision, selectivity, and stability under handling conditions.
Several questions remain unresolved. It is not yet known whether the compound reduces cardiovascular events or mortality, because outcome studies require long follow-up. The durability of weight reduction after treatment withdrawal is uncertain, and rebound has been observed with other incretin-based therapies. Long-term safety data covering several years are limited. Effects in adolescents, in pregnancy, and in people with significant kidney or liver impairment have not been characterized in published reports.
Randomized studies of retatrutide measure change in body weight as a percentage of baseline, along with absolute weight loss. Glycemic endpoints include hemoglobin A1c and fasting plasma glucose. Investigators also track blood pressure, lipid fractions, and liver fat content to characterize effects beyond weight alone. Trial designs typically use double-blind, placebo-controlled groups with periodic dose escalation, and they record adverse events throughout both treatment and follow-up periods.
| Property | Value | Notes |
|---|---|---|
| Receptor targets | GIP, GLP-1, glucagon | One molecule activates all three pathways |
| Research identifier | LY3437943 | Code used in published trial reports |
| Development stage | Phase 3, reported as ongoing | Not approved by any regulatory agency |
| Route studied | Subcutaneous | Administration form used in clinical trials |
| Studied populations | Adults with obesity or type 2 diabetes | Enrollment criteria vary between trials |
Retatrutide is an investigational peptide studied for obesity and type 2 diabetes. It is a single synthetic molecule designed to activate three metabolic receptors simultaneously. The compound belongs to the incretin mimetic family, a group of peptides that imitate gut hormones involved in appetite and glucose control. Its research code is LY3437943, and it remains under clinical study rather than cleared for routine medical use.
Acting as a triple agonist, the molecule binds the GLP-1, GIP, and glucagon receptors. GLP-1 activity slows gastric emptying and dampens appetite, while GIP signaling contributes to insulin sensitivity and fat metabolism. Glucagon receptor engagement raises energy expenditure and encourages fat breakdown, although it can also elevate blood glucose. Combining three pathways is intended to yield larger weight reduction than single or dual agonists, and researchers continue to examine how the balance among them shapes tolerability.
Material handling focuses on limiting degradation. Lyophilized powder is generally stored at reduced temperature, often around minus twenty degrees Celsius, protected from light and moisture. Once dissolved, the peptide is less stable and is commonly kept cold and used within a short window. Repeated freeze-thaw cycles promote aggregation and should be avoided. Buffers and pH influence stability, and solution conditions are usually selected to keep the peptide near neutral pH where degradation proceeds more slowly. These practices apply to laboratory reference material, not to clinical preparations.
Verification of research-grade material depends on documentation supplied with a sample. A certificate of analysis lists purity, identity, and the methods used to establish each value. Buyers comparing suppliers look at chromatographic purity figures, mass confirmation data, and whether methods are described in enough detail to be reproduced. Independent testing can confirm reported values but adds cost and time. Because the research chemical market is not uniformly regulated, provenance and documentation quality vary widely, and claims should be evaluated against raw data rather than summary labels.
与仅靶向单一受体的同类药物相比，瑞他鲁肽增加胰高血糖素受体成分，理论上可提高能量消耗并改变脂肪分布。临床中观察到的体重变化是否主要来自该额外机制，目前尚无定论。胃肠道反应是该类药物常见不良事件，试验中通过剂量递增和监测进行管理。停药后体重反弹、个体差异和长期耐受性仍需更多数据。
瑞他鲁肽是一种在研合成肽，同时作用于胰高血糖素样肽-1、葡萄糖依赖性促胰岛素多肽和胰高血糖素受体。该分子属于多受体激动剂类别，尚未获得任何监管机构的上市批准。当前临床开发主要针对肥胖和2型糖尿病，研究代号为LY3437943。已确立的信息包括受体靶点和部分中期试验结果；最终疗效、长期安全性和适用人群仍属开放问题。
Body composition is assessed with dual-energy X-ray absorptiometry or comparable methods, which separate fat mass from lean mass. Reported losses include both compartments, and the ratio between them is a subject of ongoing analysis rather than a settled result. Waist circumference, blood pressure, and lipid panels are collected as supporting measures. Resting energy expenditure and substrate oxidation are measured in smaller mechanistic studies, where glucagon receptor activity is expected to matter. These substudies are typically short and small, so their findings carry wide uncertainty.
Interpretation depends on study phase and duration. Phase 2 programs are powered for weight and safety signals, not for cardiovascular or renal outcomes, which require event-driven designs. Gastrointestinal events such as nausea, diarrhea, vomiting, and constipation are the most frequently reported adverse effects and tend to cluster around dose escalation. Small increases in heart rate have been described. Because follow-up after treatment discontinuation is limited, questions about weight regain and durability are open rather than answered.
But almost everywhere, in one form or another, there was the concept of a "philosopher's stone" – some substance that is able to turn other metals into gold, and when taken internally in small doses, heal all diseases, rejuvenate an old body and even give biological immortality. Alternatively, there were attempts to prepare "pills of immortality". During centuries alchemy gradually transformed to chemistry, in parallel giving birth to many adjacent sciences or enriching them. It is worth noticing the direction of iatrochemistry – a rational direction of alchemy with the main goal of preparing medicinal products. The pioneers of iatrochemistry were Paracelsus (1493–1541), Jan Baptist van Helmont (1580–1644) and Franciscus Sylvius (1614–1672). The converging field of alchemy was transformed into pharmacy. 1513 — searching for the Fountain of Youth is in popular culture thought to be one of the purposes of the expedition of the Spanish conquistador Juan Ponce de León, which lead to the discovery of Florida – however, there is no contemporary evidence of this, and this purpose is considered a myth by historians. 1550 — a Venetian nobleman Luigi Cornaro published the book The Art of Living Long, describing the style of life for the achievement of longevity. The book was translated into many languages. The English version of the book till the 19th century went through more than 50 editions. The main idea of the book: in order to live many years, you need to live in moderation, eat simply and little.
transposable element (TE) Also transposon. Any of a diverse variety of selfish mobile genetic elements consisting of self-acting DNA sequences capable of replicating themselves semi-autonomously and inserting into random or specific sites within a host genome, a process known as transposition. Transposons contain one or more genes which encode enzymes known as transposases capable of recognizing sequences within a flanking pair of inverted repeats, such that the enzymes effectively catalyze their own replication, excision, and/or re-insertion into other DNA molecules by any of various mechanisms.
A positive correlation has been observed between the degree of aggregation and cytotoxic potential, with CNT agglomerates exhibiting greater toxicity than CNT bundles. Agglomerated CNTs tend to form larger, more rigid, and compact structures—morphologically similar to asbestos fibers—compared to the more loosely associated CNT bundles. Specifically, agglomerated SWCNTs have been shown to induce pronounced granulomatous inflammation, characterized by granuloma formation surrounded by hypertrophic macrophages in seven days post-exposure. In contrast, well-dispersed SWCNTs elicit significantly milder inflammatory responses. Impurities: Metal contaminants of CNT materials are strongly associated with the induction of oxidative stress and proinflammatory responses, with toxicity levels closely correlated to metal content. Among them, iron is a potent catalyst for intracellular reactive oxygen species generation, disrupting iron homeostasis and promoting oxidative damage. Nickel exhibits high bioactivity and proinflammatory potential. The underlying mechanism is thought to involve lysosomal membrane destabilization, leading to the release of cathepsin B and subsequent activation of the NLRP3 inflammasome pathway. Beyond metal impurities, the presence of non-metallic contaminants, including amorphous carbon and other carbonaceous byproducts (e.g., polycyclic aromatic hydrocarbons can significantly modulate the biological response to CNTs, contributing to cytotoxicity and inflammatory signaling.
Uptake into the postsynaptic compartment, Re-uptake into the presynaptic compartment, or Uptake into a third, nonneuronal compartment. Postsynaptic neurons remove little glutamate from the synapse. There is active reuptake into presynaptic neurons, but this mechanism appears to be less important than astrocytic transport. Astrocytes could dispose of transported glutamate in two ways. They could export it to blood capillaries, which abut the astrocyte foot processes. However, this strategy would result in a net loss of carbon and nitrogen from the system. An alternate approach would be to convert glutamate into another compound, preferably a non-neuroactive species. The advantage of this approach is that neuronal glutamate could be restored without the risk of trafficking the transmitter through extracellular fluid, where glutamate would cause neuronal depolarization. Astrocytes readily convert glutamate to glutamine via the glutamine synthetase pathway and released into the extracellular space. The glutamine is taken into the presynaptic terminals and metabolized into glutamate by the phosphate-activated glutaminase (a mitochondrial enzyme). The glutamate that is synthesized in the presynaptic terminal is packaged into synaptic vesicles by the glutamate transporter, VGLUT. Once the vesicle is released, glutamate is removed from the synaptic cleft by excitatory amino-acid transporters (EAATs).
Sources: en.wikipedia.org
120 g acetic acid (60 g/mol, 2.0 mol) was reacted with 230 g ethanol (46 g/mol, 5.0 mol), yielding 132 g ethyl acetate (88 g/mol, 1.5 mol). The yield was 75%. The molar amount of the reactants is calculated from the weights (acetic acid: 120 g ÷ 60 g/mol = 2.0 mol; ethanol: 230 g ÷ 46 g/mol = 5.0 mol). Ethanol is used in a 2.5-fold excess (5.0 mol ÷ 2.0 mol). The theoretical molar yield is 2.0 mol (the molar amount of the limiting compound, acetic acid). The molar yield of the product is calculated from its weight (132 g ÷ 88 g/mol = 1.5 mol). The % yield is calculated from the actual molar yield and the theoretical molar yield (1.5 mol ÷ 2.0 mol × 100% = 75%).
== External links == Adrenocorticotropic+Hormone at the U.S. National Library of Medicine Medical Subject Headings (MeSH) Cosyntropin at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
=== Role in Infectious Disease Pathogenesis === Certain pathogens, such as Enterotoxigenic Escherichia coli (ETEC), elevate cGMP to evade host immune defenses and establish infection. ETEC's heat-stable toxin induces significant cGMP production within intestinal epithelial cells, and this cGMP is often secreted into the extracellular space, where it serves as a signaling molecule. Extracellular cGMP, in turn, triggers the release of IL-33 release which modulate inflammation and impact the immune system's ability to mount effective responses, dampening both innate and adaptive immunity.
== Further reading == Kundu, Subhas C., ed. (2014). Silk Biomaterials for Tissue Engineering and Regenerative Medicine. Woodhead Publishing Series in Biomaterials. Woodhead Publishing. ISBN 978-0-85709-699-9. Vepari, Charu; Kaplan, David L. (2007). "Silk as a biomaterial". Progress in Polymer Science. 32 (8–9): 991–1007. doi:10.1016/j.progpolymsci.2007.05.013. PMC 2699289. PMID 19543442. Rockwood, Danielle N.; Preda, Rucsanda C.; Yücel, Tuna; Wang, Xiaoqin; Lovett, Michael L.; Kaplan, David L. (2011). "Materials fabrication from Bombyx mori silk fibroin". Nature Protocols. 6 (10): 1612–1631. doi:10.1038/nprot.2011.379. PMC 3808976. PMID 21959241.
Hyperforin is a phytochemical produced by some of the members of the plant genus Hypericum, notably Hypericum perforatum (St John's wort). Hyperforin may be involved in the pharmacological effects of St. John's wort, specifically in its antidepressant effects. Meta-analyses of clinical trials suggest that H. perforatum is as effective as SSRIs for treating mild to moderate depression and is better tolerated, although findings are limited by short study durations. Hyperforin is found in significant amounts only in H. perforatum, where it accumulates as a probable plant defense compound, with modern carbon dioxide extraction methods used to isolate it from mixtures containing related compounds like adhyperforin.
Sources: en.wikipedia.org
On April 12, 2001, the CPL Winter Championship commenced at the Hyatt Regency in Dallas, Texas. The event featured 48 competing teams, marking the first large-scale Counter-Strike tournament. The competition attracted over 800 attendees, including participants and Bring Your Own Computer (BYOC) players. Many professional Quake players were notably absent, while the Counter-Strike community saw an influx of new competitors. This tournament was the largest Counter-Strike event at the time and contributed to the game's rise in professional esports. In 2003, the Esports World Convention hosted a Counter-Strike tournament which featured 37 teams competing for a $100,000 prize pool. In 2012, the Electronic Sports League removed the game from the main titles for the 2012–2013 Intel Extreme Masters due to its decreasing popularity outside of Europe.
it reflected complex political and social motivations it was not a fascist uprising, although the Italian Social Movement led it (as viewed by leftists, that it was an interclass, inter-party and intergenerational movement, that it was an anti-state uprising (in view of the “autonomous republics”) it was spontaneous and without direction, despite Mayor Battaglia's call to strike. Some studies reported the influence of the 'ndrangheta, colluding with the right (e.g., the Baracca anarchists). Another theory is that the state and secret services were involved and used it to increase tension in the country. In the 1980s, Calabria remained undeveloped. It was dominated by power groups linked to organized crime and deviant freemasonry. Social and economic initiatives, barely advanced, assuming the availability of human and other resources that did not exist. Many (expensive) works mostly benefited a few entrepreneurs rather than the masses. The 'Ndrangheta began to make headlines thanks to its ransom kidnappings (such as the one of John Paul Getty III, grandson of J. Paul Getty, onetime world's richest man who was taken in 1973 and released upon payment of a one billion seven hundred million lire ransom). In the 1980s, they turned to narcotics trafficking, forging contacts with South American drug cartels and feuding with Mafia clans for control of territory. As in Sicily, the 'ndrangheta infiltrated the politics, placing its people in municipal administrations.
According to sources for The Wall Street Journal, the personnel move led to concerns from some TikTok employees and was reported to the office of US senator Ted Cruz for further investigation. In December 2023, TikTok invested $1.5 billion in GoTo's Indonesian e-commerce business, Tokopedia. In March 2024, The Information reported that it is an open secret among investors that TikTok loses billions of dollars annually.
=== Category:EC 4.1 (carbon–carbon lyases) === Category:EC 4.1.1 Ornithine decarboxylase (EC 4.1.1.17) Uridine monophosphate synthetase (EC 4.1.1.23) Aromatic-L-amino-acid decarboxylase (EC 4.1.1.28) RubisCO (EC 4.1.1.39) Category:EC 4.1.2 Fructose-bisphosphate aldolase (EC 4.1.2.13)
Sources: en.wikipedia.org
It is a synthetic peptide triagonist that engages GIP, GLP-1, and glucagon receptors. Investigational compounds in this class are studied for metabolic conditions rather than for a single organ system.
No regulatory agency has approved it for any indication. It remains an investigational product studied within controlled clinical trial programs.
A dual agonist engages two receptor targets, typically GIP and GLP-1. A triagonist adds glucagon receptor activity, which is intended to influence energy expenditure alongside appetite and glucose handling.
Trials measure percentage change in body weight, absolute weight loss, and glycemic markers such as hemoglobin A1c. They also record blood pressure, lipids, and liver fat. Adverse events are tracked throughout.