incretin raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
Reviewed 2025-12-09. Anything still debated is marked as such rather than presented as settled.
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.
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.
化学修饰延长了分子在体内的停留时间，使较低频次的给药安排成为可能。脂肪酸侧链通过与白蛋白结合延缓清除，非天然氨基酸则降低酶解速率。这些修饰同时改变分子的溶解性与稳定性，需要在制剂设计和储存条件中一并考虑。修饰引入的免疫原性风险也属于开发过程中需要评估的项目。
该化合物处于临床试验阶段，尚未在多数地区取得上市许可。公开信息主要来自企业公告、学术会议摘要与试验注册平台记录，完整数据仍在逐步披露。关于长期疗效与安全性的判断，需要等待规模更大、随访更久的研究结果，目前不宜对最终结论作出预判。
| 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 |
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.
Research-grade peptide material is commonly supplied as a lyophilized powder, a form that limits degradation during transport and storage. Standard practice keeps such material cold and protected from light and moisture, with tighter conditions used for long-term archives. Once dissolved, solutions are generally considered less stable than the dry powder and are handled on shorter timescales. These established conventions derive largely from general peptide chemistry rather than from compound-specific evidence alone.
Identification and purity assessment typically rely on reversed-phase high-performance liquid chromatography, often paired with mass spectrometry. Mass measurement confirms the expected molecular mass and can reveal truncations or modifications. Peptide mapping and sequencing techniques provide sequence-level confirmation when needed. Because related peptide impurities can behave similarly in a single method, orthogonal techniques are usually combined. Reported purity values depend heavily on the method used and should be interpreted with that in mind.
The intended pharmacology combines three signals in one molecule. GLP-1 receptor activation reduces appetite and slows gastric emptying, effects already exploited by approved incretin-based therapies. GIP receptor engagement is associated with improved insulin sensitivity and with direct effects on adipose tissue, although how much it contributes to overall outcomes is still debated. Glucagon receptor agonism raises energy expenditure and supports hepatic lipid handling, a mechanism that also tends to increase glucose output. The triple profile is hypothesized to produce a larger metabolic effect than single or dual agonism, but the relative weight of each receptor in humans is not settled.
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.
Identity and purity are established with reversed-phase high-performance liquid chromatography and mass spectrometry. Chromatographic profiles reveal related impurities, truncated sequences, and oxidation products, while mass measurement confirms the expected molecular mass. Purity values for research material are typically reported as a percentage by peak area. Reference standards help calibrate retention behavior across instruments. Independent laboratories emphasize method suitability because results depend heavily on column chemistry, gradient, and detection wavelength. Batch-to-batch comparison relies on the same validated method.
Investigational peptide material is commonly distributed as a lyophilized powder in sealed vials. The solid form appears as a white to off-white cake or powder and is hygroscopic once opened. Peptides of this size are sensitive to moisture, repeated freeze-thaw cycles, and prolonged exposure to ambient light. Handling practices therefore emphasize desiccation, minimal vial opening, and cold storage. Working aliquots are often prepared to avoid repeatedly warming the bulk container.
Solid material is generally held at -20 °C or colder, while reconstituted solutions are kept at 2-8 °C and used within a short window. Buffers that maintain a slightly acidic to neutral pH tend to improve short-term peptide stability. Repeated warming and cooling of stock solutions promotes aggregation and should be avoided. Container closures should remain intact, since adsorption to some plastics can reduce the amount of peptide in solution.
== Gene == Common aliases of EPCIP are C21orf62, C21orf120, PRED81, and B37. EPCIP is located on chromosome 21 in humans, and is specifically at the q22.11 position. The EPCIP gene is 4132 base pairs in length and contains five exons.
Public health advisories to prevent fentanyl misuse and fatal overdose have been issued by the US Centers for Disease Control and Prevention (CDC). An initial HAN Advisory, also known as a Health Alert Network Advisory ("provides vital, time-sensitive information for a specific incident or situation; warrants immediate action or attention by health officials, laboratorians, clinicians, and members of the public; and conveys the highest level of importance") was issued during October 2015. A subsequent HAN Alert was issued in July 2018, warning of rising numbers of deaths due to fentanyl abuse and mixing with non-opioids. A December 2020 HAN Advisory warned of:
Like many large public universities in the U.S., sports are a major activity on campus, and receive a large operating budget. Arizona's athletic teams are nicknamed the Wildcats, a name derived from a 1914 football game with then California champions Occidental College, where the L.A. Times asserted, "the Arizona men showed the fight of wildcats." The University of Arizona participates in the NCAA's Division I-A in the Big 12 Conference, which it was admitted in 2024.
Flareups continued to occur starting on June 19, sending more smoke into the air which continued to impact the local Boyle Heights community. The warehouse also experienced severe structural damage during the fire. The solar panels on the roof and the collapse of roof structure made fighting the fire difficult. On June 18, the shelter-in-place order was briefly reinstated after crews detected hydrogen fluoride, indicating that a lithium-ion battery (likely from a battery-operated forklift) had ignited inside the facility. Officials also raised concerns that the estimated 85 million pounds of frozen food (including bread, poultry, pork, and beef) inside the facility—no longer kept cold by the damaged refrigeration system—would begin to decompose, creating foul odors and potential biohazards, which Mayor Bass compared to food spoiling during a prolonged power outage. Health concerns intensified as the fire continued, with officials extending particulate matter advisories and Los Angeles Unified School District relocating students from several nearby schools due to air quality impacts. Regulatory monitors and sensors recorded improved PM2.5 levels in Central and Southeast Los Angeles, the San Gabriel Valley, and the San Fernando Valley, though air quality near the fire itself remained elevated, with "Very Unhealthy" conditions measured throughout the day in Boyle Heights; other areas ranged from "Good" to "Moderate" for PM2.5.
Food grade wrapping paper and perforated polyethylene bags are the most suitable materials for packaging tempeh. They have demonstrated good retention of the quality of tempeh and extension of the shelf life of tempeh for three days compared to fresh tempeh. Appropriate packaging is important as it provides optimum oxygen supply and temperature for inoculation and fermentation to occur during processing. Tempeh is a perishable food and must be wrapped and placed into the refrigerator or freezer immediately after incubation or other processing steps such as blanching. In the refrigerator or freezer, stacking of tempeh should be minimized to prevent overheating and the undesirable, gradual continuation of fermentation, both of which shorten the storage life of tempeh. Even under cold temperature, tempeh continues to respire and undergo slow decomposition from microorganisms and its natural enzymes. Therefore, tempeh should be well cooled for at least two to five hours in a cooler before it undergoes further packaging. Tempeh packaged in perforated polyethylene bags is usually repacked inside another labeled, non-perforated bag for distribution, sale and easier labeling. If the tempeh is packaged in only one perforated bag, the label must be directly attached to the perforated surface with the use of government food contact approved adhesive. It is then bulk packed in cartons and returned to the refrigerator or freezer to await shipment.
Sources: en.wikipedia.org
The division is heir to the Blue Division which fought during the Franco-Prussian War of 1870, in particular during the Battle of Bazeilles and the 9th Colonial Infantry Division, part of the Free French Forces, which distinguished themselves in the apprehending of Elba in June 1944 and the disembarking in Provence on 15 August of the same year. The Division then made way to Indochina, where it was placed dormant (without being dissolved) in December 1947. The unit was reactivated in July 1963 in Brittany under the designation of 9th Brigade. On 1 January 1976, the division was baptized as 9th Marine Infantry Division 9e DIMa. Accordingly, the division was attached to the terrestrial intervention force, then the Rapid Action Force (FAR) since 1983. On 1 July 1999, the unit was restructured in a brigade and was designated as 9th Light Armoured Marine Brigade (BLBMa). On 1 January 2013, the brigade was named to the current designation as the 9th Marine Infantry Brigade (9e BIMa). The headquarter staff is stationed in Poitiers since 1 July 2010. The motto of the brigade is "Semper et Ulbique", Latin for "Always and All over". The "9th" illustrated capability on all exterior theatres of operations where France has been engaged since World War II: Indochina, Lebanon, Kuwait, Macedonia, Kosovo, Bosnia, Congo, Tchad, Ivory Coast.
The term flourishing, in positive psychology, refers to optimal human functioning. It comprises four parts: goodness, generativity, growth, and resilience (Fredrickson, 2005). According to Fredrickson (2005), goodness is made up of: happiness, contentment, and effective performance; generativity is about making life better for future generations, and is defined by "broadened thought-action repertoires and behavioral flexibility"; growth involves the use of personal and social assets; and resilience reflects survival and growth after enduring a hardship. A flourishing life stems from mastering all four of these parts. Two contrasting ideologies are languishing and psychopathology. On the mental health continuum, these are considered intermediate mental health disorders, reflecting someone living an unfulfilled and perhaps meaningless life. Those who languish experience more emotional pain, psychosocial deficiency, restrictions in regular activities, and missed workdays. Fredrickson & Losada (2005) conducted a study on university students, operationalizing positive and negative affect. Based on a mathematical model which has been strongly criticized, and now been formally withdrawn by Fredrickson as invalid, Fredrickson & Losada claimed to have discovered a critical positivity ratio, above which people would flourish and below which they would not.
A large proportion of commercial drugs (e.g. aspirin, ivermectin, cyclosporin, taxol) are derived from natural products that evolved due to their involvement in ecological interactions. While it has been proposed that the study of natural history could contribute to the discovery of new drug leads, most drugs derived from natural products were not discovered due to prior knowledge of their ecological functions. However, many fundamental biological discoveries have been facilitated by the study of plant toxins. For example, the characterization of the nicotinic acetylcholine receptor, the first neurotransmitter receptor to be identified, ensued from investigations into the mechanisms of action of curare and nicotine. Similarly, the muscarinic acetylcholine receptor takes its name from the fungal toxin muscarine. Whereas aquatic fungi provide specialized metabolites of interest for antibiotics, e.g. pestalone. Pestalone inhibits the growth of marine bacteria, the pathway to produce pestalone by marine fungi was found not to work when the bacteria is absent. The compound pestalone was derived from a marine fungus located in the Bahamas Islands on the surface of a brown alga, Rosenvingea sp. Development in biotechnology focuses on aquatic fungi in the pursuit of new antibiotics was inspired by terrestrial fungi, the cross over is not equivalent as demands in aquatic fungi are not exact to their terrestrial counter parts. Some aquatic fungi have shown changes to sphingolipid production under stressors such as acid resulting in the inhibition of biofilm formation.
Ion Torrent Systems Inc. (now owned by Life Technologies) developed a system based on using standard sequencing chemistry, but with a novel, semiconductor-based detection system. This method of sequencing is based on the detection of hydrogen ions that are released during the polymerisation of DNA, as opposed to the optical methods used in other sequencing systems. A microwell containing a template DNA strand to be sequenced is flooded with a single type of nucleotide. If the introduced nucleotide is complementary to the leading template nucleotide it is incorporated into the growing complementary strand. This causes the release of a hydrogen ion that triggers a hypersensitive ion sensor, which indicates that a reaction has occurred. If homopolymer repeats are present in the template sequence, multiple nucleotides will be incorporated in a single cycle. This leads to a corresponding number of released hydrogens and a proportionally higher electronic signal.
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.
指同一个分子能激活 GIP、GLP-1 和胰高血糖素三类受体。它与只激活一到两种受体的同类分子在设计思路上有所区别。这种设计的目的在于覆盖更多代谢调节通路。