The short version of incretin receptor fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-02-05 and is reviewed periodically as new material appears.
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。
开发进程从早期单次和多次给药研究推进至大规模后期试验。公开报告显示，参与者在体重和相关代谢指标上出现变化，但完整数据需经同行评审并接受独立复核。试验设计通常包括随机、双盲和对照设置，以区分药物效应与行为干预。监管提交和标签范围尚未确定；长期维持效果与心血管结局仍是开放问题。
Pharmacologically the compound activates three receptors: GLP-1, GIP, and glucagon. GLP-1 and GIP signaling contribute to glucose-dependent insulin release, delayed gastric emptying, and reduced appetite, while glucagon receptor activation is associated with increased energy expenditure and hepatic fat oxidation. The single-molecule design is intended to keep these activities in one peptide rather than combining separate agents. Relative activity at each receptor differs, and the balance between them is a central question in interpretation. The glucagon component is partly offset by incretin-mediated insulin secretion, an interaction that remains incompletely characterized.
Development has progressed from single- and multiple-ascending-dose studies in healthy volunteers into larger randomized trials in adults with obesity, type 2 diabetes, and fatty liver disease. Early reports describe dose-dependent reductions in body weight and improvements in glycemic markers over treatment periods of several months. Whether the glucagon arm adds tolerability cost without added benefit is still debated. Long-term cardiovascular outcomes, effects after treatment stops, and performance in older or comorbid populations are open questions rather than settled findings. Approval status may change, so the current investigational label should be confirmed against regulatory sources.
| Property | Value | Notes |
|---|---|---|
| 研究代号 | LY3437943 | 文献中常用的实验标识 |
| 药物类别 | 三重受体激动剂 | 靶向GLP-1、GIP与胰高血糖素受体 |
| 开发状态 | 后期临床研究 | 尚未获批上市 |
| 主要研究人群 | 肥胖与2型糖尿病 | 入组条件依试验方案而定 |
| 常见同义词 | 瑞他鲁肽；LY3437943 | 名称拼写可能因语言和出版物而异 |
Clinical studies have reported notable reductions in body weight among participants. Early trials measured safety and explored several dose levels, and later studies tracked body-weight change over months of treatment. Investigators also monitor effects on glycemic markers, liver fat, and blood lipids. Because the compound is still in development, questions about long-term safety, cardiovascular outcomes, and durability after treatment ends remain open.
The three-receptor design places retatrutide in a distinct category relative to older incretin-based therapies. Single agonists target one receptor, and dual agonists target two. Adding a third target broadens the pharmacological footprint and introduces new trade-offs among efficacy, tolerability, and glucose control. How these trade-offs resolve in large trials is a central focus of current research.
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.
Each receptor contributes a different physiological effect. Activation of the GLP-1 receptor slows gastric emptying and reduces appetite signaling in the brain. GIP receptor activity influences insulin secretion and lipid handling, while glucagon receptor stimulation raises energy use and fat oxidation. Combining these pathways is intended to produce weight loss beyond what single- or dual-receptor agonists achieve. Researchers attribute the observed potency to simultaneous engagement of all three targets, though the exact contribution of each receptor to overall effect remains under investigation.
Clinical development has advanced through phase 2 trials in adults with obesity and type 2 diabetes. Reported phase 2 results described substantial average weight reduction over roughly forty-eight weeks of weekly dosing. A phase 3 program is ongoing to confirm efficacy and assess long-term safety. Because the compound has not received regulatory approval, it is not available as a prescription product. Public discussion of retatrutide often conflates trial findings with marketed status, an important distinction when interpreting coverage of the topic.
11 August – A bioengineered cornea made from pig's skin is shown to restore vision to blind people. It can be mass-produced and stored for up to two years, unlike donated human corneas that are scarce and must be used within two weeks. 12 August — The National Centers for Environmental Information publish a report, where they state an all-time record cold temperature occurred in Australia during the month. On October 7, 2022, Zack Labe, a climate scientist for the NOAA GFDL releases a statement and a climate report from Berkeley Earth denying the all-time record cold temperature occurred saying, "There are still no areas of record cold so far in 2022." Labe's statement also denies the record cold temperatures in Brazil, reported by the National Institute of Meteorology in May 2022, a month before the official start of winter, was also not record cold temperatures. 13 August – Rocket Lab describes its self-funded plans in detail, first announced in early 2020, to send a probe to Venus, likely in 2023, to search for life in the planet's cloud layer, where other scientists reported the potential detection of biosignature-levels of phosphine in late 2020 and thereafter. ~14 August – As record-breaking heatwaves and droughts affect water supplies, rivers (along with shipping and nuclear reactor cooling), ecosystems, various global supply chains, health, and agriculture worldwide, in Europe, Spain domestically restricts e.g.
== Branches == Physical chemistry – study of the physical and fundamental basis of chemical systems and processes. In particular, the energetics and dynamics of such systems and processes are of interest to physical chemists. Important areas of study include chemical thermodynamics, chemical kinetics, electrochemistry, statistical mechanics, spectroscopy, and more recently, astrochemistry. Physical chemistry has large overlap with molecular physics. Physical chemistry involves the use of infinitesimal calculus in deriving equations. It is usually associated with quantum chemistry and theoretical chemistry. Physical chemistry is a distinct discipline from chemical physics, but again, there is very strong overlap. Chemical kinetics – study of rates of chemical processes. Chemical physics – investigates physicochemical phenomena using techniques from atomic and molecular physics and condensed matter physics; it is the branch of physics that studies chemical processes. Electrochemistry – branch of chemistry that studies chemical reactions which take place in a solution at the interface of an electron conductor (the electrode: a metal or a semiconductor) and an ionic conductor (the electrolyte), and which involve electron transfer between the electrode and the electrolyte or species in solution. Femtochemistry – area of physical chemistry that studies chemical reactions on extremely short timescales, approximately 10−15 seconds (one femtosecond). Geochemistry – chemical study of the mechanisms behind major systems studied in geology.
== External links == Human HIBADH genome location and HIBADH gene details page in the UCSC Genome Browser. PDBe-KB provides an overview of all the structure information available in the PDB for Human 3-hydroxyisobutyrate dehydrogenase, mitochondrial
A serous membrane lines the pericardial cavity of the heart, and reflects back to cover the heart, much like an under-inflated balloon would form two layers surrounding a fist. Called the pericardium, this serous membrane is a two-layered sac that surrounds the entire heart except where blood vessels emerge on the heart's superior side; The pleura is the serous membrane that surrounds the lungs in the pleural cavity; The peritoneum is the serous membrane that surrounds several organs in the abdominopelvic cavity. The tunica vaginalis is the serous membrane, which surrounds the male gonad, the testis. The two layers of serous membranes are named parietal and visceral. Between the two layers is a thin fluid filled space. The fluid is produced by the serous membranes and stays between the two layers to reduce friction between the walls of the cavities and the internal organs when they move with respect to one another, such as when the lungs inflate or the heart beats. Such movement could otherwise lead to inflammation of the organs.
Sources: en.wikipedia.org
Attempting to assert his claimed prerogatives as Her Majesty's Rhodesian Prime Minister, Smith advised the Queen by letter to appoint Dupont as Governor-General to supersede Gibbs. The letter was ignored, with Buckingham Palace characterising Smith's request as "purported advice". Whitehall maintained that Gibbs was the Queen's only legitimate representative in what it still reckoned as the colony of Southern Rhodesia–and hence, the only lawful authority in the area. Dupont nevertheless effectively replaced the Governor. The Smith administration assigned him the Governor's official residence at Government House, but no attempt was made to forcibly remove Gibbs and his entourage; the post-UDI government stated that the Officer Administering the Government would live at Governor's Lodge instead "until Government House, at present temporarily occupied by Sir Humphrey Gibbs in a private capacity, becomes available". The Speaker of the Rhodesian parliament, A. R. W. Stumbles, reconvened the Legislative Assembly on 25 November, resolving that if he did not there would be chaos. He feared that Gibbs might dramatically walk into the chamber in an attempt to stop the proceedings, but Gibbs did no such thing. The parliamentary opposition opened the meeting by asking whether the assembly was legal. Ahrn Palley, the lone white opposition MP, announced that as he saw it, "certain Honourable Members in collusion have torn up the constitution under which this House meets. The proceedings have no legal validity whatsoever".
To some degree, all cells of endotherms give off heat, especially when body temperature is below a regulatory threshold. However, brown adipose tissue is highly specialized for this non-shivering thermogenesis. First, each cell has a higher number of mitochondria compared to more typical cells. Second, these mitochondria have a higher-than-normal concentration of thermogenin in the inner membrane.
Bioelectrical impedance analysis (BIA) Computed tomography (CT scans) Dual-energy X-ray absorptiometry (DEXA) Magnetic resonance imaging (MRI) However, these methods are not widely used because they can be expensive and difficult to access.
Similar chakra (spoked-wheel) symbols are among the most ancient in all Indian history. Madhavan and Parpola note that a wheel symbol appears frequently in Indus Valley Civilisation artifacts, particularly on several seals. Notably, it is present in a sequence of ten signs on the Dholavira Signboard. Some historians associate the ancient chakra symbols with solar symbolism. In the Vedas, the god Surya is associated with the solar disc, which is said to be a chariot of one wheel (cakra). Mitra, a form of Surya, is described as "the eye of the world", and thus the sun is conceived of as an eye (cakṣu) which illuminates and perceives the world. Such a wheel is also the main attribute of Vishnu. Thus, a wheel symbol might also be associated with light and knowledge.
Leukotrienes are members of a family of eicosanoid inflammatory mediators produced in leukocytes by the oxidation of arachidonic acid (AA) and the essential fatty acid eicosapentaenoic acid (EPA) by the enzyme arachidonate 5-lipoxygenase. Leukotrienes use lipid signaling to convey information to either the cell producing them (autocrine signaling) or neighboring cells (paracrine signaling) in order to regulate immune responses. The production of leukotrienes is usually accompanied by the production of histamine and prostaglandins, which also act as inflammatory mediators. The role of one type of leukotriene (specifically, leukotriene D4) is to trigger contractions in the smooth muscles lining the bronchioles; their overproduction is a major cause of inflammation in asthma and allergic rhinitis. Leukotriene antagonists are used to treat these disorders by inhibiting the production or activity of leukotrienes.
Sources: en.wikipedia.org
== Structure == Pseudopeptidoglycan is composed of two sugars, N-acetylglucosamine and N-acetyltalosaminuronic acid. These sugars are made of different amino acids, and the peptide cross-links within pseudopeptidoglycan are formed with different amino acids. The peptide bond is formed between the lysine of a N-acetyltalosaminuronic acid and a glutamine of a parallel N-acetyltalosaminuronic acid. Pseudopeptidoglycan, like peptidoglycan in bacteria, forms a mesh-like layer outside of the plasma membrane of the archaea.
No more than 5 hydrogen bond donors (the total number of nitrogen–hydrogen and oxygen–hydrogen bonds) No more than 10 hydrogen bond acceptors (all nitrogen or oxygen atoms) A molecular mass less than 500 daltons A calculated octanol-water partition coefficient (Clog P) that does not exceed 5 Note that all numbers are multiples of five, which is the origin of the rule's name. As with many other rules of thumb, such as Baldwin's rules for ring closure, there are many exceptions.
=== Helix structure === In 1948, Pauling discovered that many proteins included helical (see alpha helix) shapes. Pauling had deduced this structure from X-ray patterns and from attempts to physically model the structures. (Pauling was also later to suggest an incorrect three chain helical DNA structure based on Astbury's data.) Even in the initial diffraction data from DNA by Maurice Wilkins, it was evident that the structure involved helices. But this insight was only a beginning. There remained the questions of how many strands came together, whether this number was the same for every helix, whether the bases pointed toward the helical axis or away, and ultimately what were the explicit angles and coordinates of all the bonds and atoms. Such questions motivated the modeling efforts of Watson and Crick.
== Treatment == Emergency lowering of potassium levels is needed when new arrhythmias occur at any level of potassium in the blood, or when potassium levels exceed 6.5 mmol/L. Several agents are used to temporarily lower K+ levels. The choice depends on the degree and cause of the hyperkalemia, and other aspects of the person's condition.
Sources: en.wikipedia.org
尚未。它仍处于临床研究阶段，任何监管批准都取决于正在进行的试验结果和提交审评。可公开获取的信息以试验注册和会议摘要为主。
司美格鲁肽主要靶向GLP-1受体，而瑞他鲁肽同时作用于GLP-1、GIP和胰高血糖素受体。这种三重机制旨在产生不同的代谢效应，但临床差异仍需头对头研究确认。
长期心血管结局、停药后维持效果、罕见不良事件和不同人群中的获益风险比尚未完全确定。完整三期数据和监管审评将影响结论。
As of the mid-2020s retatrutide remains investigational and is not an approved medicine in the United States or the European Union. It has been supplied mainly to participants in clinical trials. Labels and availability can change, so regulatory listings should be checked directly.