This is a working overview of glucagon receptor, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2026-08-01 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.
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.
| 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 |
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。
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。
Human evidence remains limited to controlled studies. A phase 2 trial in adults with obesity reported large, dose-dependent reductions in body weight over 48 weeks, with gastrointestinal events as the most frequently recorded adverse effect. Phase 3 programs designated TRIUMPH, for obesity, and TRANSCEND, for type 2 diabetes, are intended to confirm efficacy and to characterize safety in larger populations. Related studies are examining conditions such as knee osteoarthritis in people with obesity and metabolic liver disease. Open questions include long-term tolerability, effects on lean mass, and what happens after treatment is stopped.
Retatrutide is an investigational synthetic peptide that acts on three receptor targets at once: glucose-dependent insulinotropic polypeptide, glucagon-like peptide-1, and glucagon. It is developed by Eli Lilly and appears in the literature and in trial registries under the code LY3437943. The molecule belongs to a class of engineered peptides designed to resist rapid breakdown and permit infrequent subcutaneous administration. No regulatory agency has approved it for clinical use, and all available human data come from controlled trials rather than from routine practice.
It typically appears in the form of a white or brown powder. Treatment of heroin addiction often includes behavioral therapy and medications. Medications can include buprenorphine, methadone, or naltrexone. A heroin overdose may be treated with naloxone. As of 2015, an estimated 17 million people use opiates non-medically, of which heroin is the most common, and opioid use resulted in an estimated 109 thousand to 129 thousand deaths in 2015. The total number of heroin users worldwide is believed to have increased in Africa, the Americas, and Asia between 2000 and 2015. In the United States, approximately 1.6 percent of people reported using heroin at some point in their lives and 0.4% of people aged 12 or older in 2021 reported using heroin in the past 12 months. When people die from overdosing on a drug, the drug is usually an opioid and often heroin. Heroin was first made by C. R. Alder Wright in 1874 from morphine, a natural product of the opium poppy. Internationally, heroin is controlled under Schedules I and IV of the Single Convention on Narcotic Drugs, and it is generally illegal to make, possess, or sell without a license. About 448 tons of heroin were made in 2016. In 2015, Afghanistan produced about 66% of the world's opium. Illegal heroin is often mixed with other substances such as sugar, starch, caffeine, quinine, or other opioids like fentanyl.
Kanury Rao also known as Kanury Venkata Subba Rao (born 1958) is an Indian immunologist. He was the head of the Drug Discovery Research Centre (DDRC) at the Translational Health Science and Technology Institute (THSTI) Faridabad. He is known for his studies in the fields of peptide synthesis and cell signaling and the design of synthetic peptide vaccines. He is an elected fellow of the Indian Academy of Sciences, National Academy of Sciences, India and the Indian National Science Academy. and a recipient of several awards including the Millennium Plaque of Honour of the Indian Science Congress and the National Bioscience Award for Career Development. The Council of Scientific and Industrial Research awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, in 1997, for his contributions to biological sciences.
=== Others === In shaving soap and aftershave products to relieve razor burn. As a smoking tobacco additive in some cigarette brands, for flavor, and to reduce throat and sinus irritation caused by smoking. Menthol also increases nicotine receptor density, increasing the addictive potential of tobacco products. As a pesticide against tracheal mites of honey bees. In perfumery, menthol is used to prepare menthyl esters to emphasize floral notes (especially rose). In various patches ranging from fever-reducing patches applied to children's foreheads to "foot patches" to relieve numerous ailments (the latter being much more frequent and elaborate in Asia, especially Japan: some varieties use "functional protrusions", or small bumps to massage one's feet as well as soothing them and cooling them down). As an antispasmodic and smooth muscle relaxant in upper gastrointestinal endoscopy.
== History == The first documented example of an aerogel was created by Samuel Stephens Kistler in 1931, as a result of a bet with Charles Learned over who could replace the liquid in "jellies" with gas without causing shrinkage.
Slow the Emergence of Resistant Bacteria and Prevent the Spread of Resistant Infections Strengthen National One-Health Surveillance Efforts to Combat Resistance Advance Development and use of Rapid and Innovative Diagnostic Tests for Identification and Characterization of Resistant Bacteria Accelerate Basic and Applied Research and Development for New Antibiotics, Other Therapeutics, and Vaccines Improve International Collaboration and Capacities for Antibiotic Resistance Prevention, Surveillance, Control and Antibiotic Research and Development The following are goals set to meet by 2020:
Sources: en.wikipedia.org
=== 1980s === Biomedical research in the 1980s was characterized by rapid advances in molecular diagnostics and genetic engineering. In 1983, Kary Mullis invented the Polymerase Chain Reaction (PCR), a technique that enabled the exponential amplification of specific DNA sequences. PCR revolutionized medical diagnostics, forensic science, and molecular genetics. The decade was also defined by the biomedical response to the HIV/AIDS epidemic following the identification of the human immunodeficiency virus in 1983 and 1984 by Luc Montagnier, Françoise Barré-Sinoussi and Robert Gallo. Additionally, recombinant human insulin, approved in 1982, became the first commercially available medication produced through recombinant DNA technology.
==== Anticancer properties ==== Some cecropins (e.g. cecropin A, and cecropin B) have anticancer properties and are called anticancer peptides (ACPs). Hybrid ACPs based on Cecropin A have been studied for anticancer properties. The fruit fly Defensin prevents tumour growth, suspected to bind to tumour cells owing to cell membrane modifications common to most cancer cells, such as phosphatidylserine exposure.
Around 1862, Karl Heinrich Ritthausen isolated the amino acid glutamic acid. Thomas Burr Osborne compiled a detailed review of the vegetable proteins at the Connecticut Agricultural Experiment Station. Osborne, alongside Lafayette Mendel, established several nutritionally essential amino acids in feeding experiments with laboratory rats. Diets lacking an essential amino acid stunts the rats' growth, consistent with Liebig's law of the minimum. The final essential amino acid to be discovered, threonine, was identified by William Cumming Rose. The difficulty in purifying proteins impeded work by early protein biochemists. Proteins could be obtained in large quantities from blood, egg whites, and keratin, but individual proteins were unavailable. In the 1950s, the Armour Hot Dog Company purified 1 kg of bovine pancreatic ribonuclease A and made it freely available to scientists. This gesture helped ribonuclease A become a major target for biochemical study for the following decades.
Model of Structure of Penicillin, by Dorothy Hodgkin et al., Museum of the History of Science, Oxford The Discovery of Penicillin, A government-produced film about the discovery of Penicillin by Sir Alexander Fleming, and the continuing development of its use as an antibiotic by Howard Florey and Ernst Boris Chain on YouTube. Penicillin at The Periodic Table of Videos (University of Nottingham) "Penicillin Released to Civilians Will Cost $35 Per Patient", Popular Science, August 1944, article at bottom of page Episode 2 (of 4): "Medical Drugs" of the BBC Four and PBS show: Extra Life: A Short History of Living Longer (2021)
Sources: en.wikipedia.org
They also reported that facilities that offered these surgeries were also posting about them on TikTok. TikTok has banned the advertising of cosmetic surgeries on the platform but cosmetic surgeons are still able to reach large audiences using unpaid photo and video posts. NBC reported that videos using the hashtags '#plasticsurgery' and '#lipfiller' had amassed a combined 26 billion views on the platform. In December 2022, it was reported that a cosmetic surgery procedure known as buccal fat removal was going viral on the platform. The procedure involves surgically removing fat from the cheeks in order to give the face a slimmer and more chiseled appearance. Videos using hashtags related to buccal fat removal had collectively amassed over 180 million views. Some TikTok users criticized the trend for promoting an unobtainable beauty standard.
==== Lysozyme ==== Function: An enzyme that is produced by animals that forms part of the innate immune system and is abundant in the secretions of saliva, human milk, tears, and mucus. It functions as an antimicrobial agent by splitting the peptidoglycan component of bacterial cell walls, which then leads to cell death. Clinical Significance: Toxic levels of blood are caused by the excessive production of lysozyme's by cancer cells. Lysozyme's have also been associated with Bronchopulmonary dysplasia (BPD) in newborns and is a key factor in providing the immunology of infants during breast feeding.
==== Sublabial ==== Sublabial administration is achieved by placing the drug between the lip and gum. The frenulum of the tongue may be irritated when in contact with corrosive materials but can be avoided with this route. It is usually used for medications such as nitroglycerin, for example.
The ribosomal tunnel, or peptide tunnel, is a part of the ribosome that holds the nascent polypeptide chain during translation. The ribosomal tunnel is located in the large subunit of the ribosome and connects the catalytic site of the ribosome with its surface.
==== Hong Kong ==== In Hong Kong, codeine is regulated under the Laws of the Hong Kong, Dangerous Drugs Ordinance, Chapter 134, Schedule 1. It can be used legally only by health professionals and for university research purposes. The substance can be given by pharmacists under a prescription. Anyone who supplies the substance without a prescription can be fined $10,000 (HKD). The maximum penalty for trafficking or manufacturing the substance is a $5,000,000 (HKD) fine and life imprisonment. Possession of the substance for consumption without license from the Department of Health is illegal with a $1,000,000 (HKD) fine and/or 7 years of jail time. However, codeine is available without prescription from licensed pharmacists in doses up to 0.1% (i.e. 5 mg/5ml)
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.
It is a synthetic peptide classified as a triple receptor agonist. It engages the GLP-1, GIP, and glucagon receptors at once. It is investigated for metabolic and weight-related conditions rather than approved for general use.