The short version of dual agonist fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2025-11-26. Anything still debated is marked as such rather than presented as settled.
The molecule is a synthetic 39-amino-acid peptide whose backbone derives from the sequence of human glucose-dependent insulinotropic polypeptide, with several substitutions that raise metabolic stability and shift receptor preference. A C20 fatty diacid is attached through a short linker to a lysine side chain, a modification that increases binding to serum albumin. The reported monoisotopic mass is approximately 4813 Da. Near neutral pH the peptide carries a net negative charge, and the lipid tail makes the molecule markedly more hydrophobic than the unmodified parent sequence.
Dual agonism at the GIP and GLP-1 receptors underlies the observed pharmacology. Activation of GLP-1 receptors raises glucose-dependent insulin release, lowers glucagon secretion, slows gastric emptying and reduces appetite. GIP receptor activation contributes additional effects on adipose tissue and on energy balance, and the combined action on appetite appears larger than either pathway alone in animal models. Signalling bias and the relative contribution of each receptor arm to weight-related effects remain areas of active investigation.
Recommended storage for reference material is a freezer at approximately -20 degrees Celsius, protected from light and moisture. Commercial injectable presentations are stored refrigerated between 2 and 8 degrees Celsius and must not be frozen. Product labelling generally permits a limited period at controlled room temperature once dispensed, with the exact window depending on the presentation. Repeated temperature cycling is avoided because it can promote aggregation or deamidation of the peptide chain.
Identity and purity are assessed by reversed-phase high-performance liquid chromatography, with mass confirmation by electrospray ionisation mass spectrometry. Peptide mapping after enzymatic digestion verifies the primary sequence. Size-exclusion chromatography quantifies aggregates, while circular dichroism provides a secondary-structure fingerprint. Bioanalytical quantification in plasma uses immunoassay or LC-MS/MS. Reported purity for research-grade lots is commonly 95 percent or higher, and residual water content is checked by Karl Fischer titration.
As a peptide, tirzepatide is handled as a lyophilised solid in research settings and as a preserved solution in finished products. Aqueous solubility is pH dependent and reaches a minimum near the isoelectric point, which lies close to pH 5.4. Stock solutions are typically prepared in neutral or slightly basic buffer to limit precipitation. The solid is hygroscopic and should be equilibrated to room temperature before opening so that condensation does not form on the powder surface.
| Property | Value | Notes |
|---|---|---|
| Molar mass | approximately 4813 Da | calculated from the 39-residue sequence |
| Appearance | white to off-white powder | typical of lyophilised peptide material |
| Solubility class | freely soluble in water | measured value depends on salt form and pH |
| Plasma protein binding | >99 percent | linked to the fatty diacid side chain |
| Class | dual GIP and GLP-1 receptor agonist | receptor activity varies with the assay used |
Clinical research programs have evaluated tirzepatide in adults with type 2 diabetes and in adults with obesity or excess weight. Trials generally reported reductions in glycated hemoglobin and body weight across treatment periods of several months. Since these studies enrolled defined populations under controlled conditions, the findings describe group averages rather than individual outcomes. Open questions include the durability of effects after treatment stops, variation among subgroups, and the long-term consequences of sustained dual receptor stimulation. Published trial summaries should be consulted for exact measurements rather than secondary accounts.
Tirzepatide is a synthetic peptide built from 39 amino acid residues. Its backbone derives from the native glucose-dependent insulinotropic polypeptide sequence, altered at several positions to resist enzymatic cleavage. A fatty diacid group attached through a linker extends plasma residence time by promoting reversible binding to serum albumin. The molecule carries a net negative charge near physiological pH and has a reported molecular weight close to 4813 daltons. These features separate it from shorter incretin analogs and account for its prolonged dosing interval.
Pharmacologically, tirzepatide activates two distinct G protein-coupled receptors: the glucose-dependent insulinotropic polypeptide receptor and the glucagon-like peptide-1 receptor. Binding at each target triggers cyclic AMP accumulation and downstream signaling in pancreatic beta cells, adipose tissue and the central nervous system. Because the two pathways overlap only partially, the combined effect on insulin secretion, glucagon suppression and appetite signaling differs from that of selective single-receptor compounds. Affinity is not equal across the two targets, and the clinical meaning of that imbalance remains an area of active study.
Development began in the 2010s, when researchers modified a GIP-based scaffold to add GLP-1 activity and then attached the fatty diacid to lengthen its half-life. Clinical evaluation proceeded through large phase 3 programmes in type 2 diabetes and in obesity, and regulators in the United States cleared the compound for type 2 diabetes in 2022 and for chronic weight management in 2023. Several cardiovascular and metabolic outcome studies are still reporting, so the picture of long-term benefit and risk is incomplete. Approvals in other regions followed on different timelines.
Tirzepatide is a synthetic peptide of 39 amino acids that carries a C20 fatty diacid side chain attached through a linker. Its molecular formula is C225H348N48O68, and its molecular weight is about 4813 daltons. The compound belongs to the incretin mimetic class and is administered by subcutaneous injection. The fatty acid chain promotes binding to serum albumin, which slows renal clearance and extends the circulation time of the molecule. It was identified during screening of sequences derived from glucose-dependent insulinotropic polypeptide.
溶解操作一般使用注射用水或适宜的水性缓冲液，必要时加入少量助溶剂以改善溶解速度，但应避免剧烈涡旋振荡，因为剪切力可能促进聚集。配制后的溶液在冷藏条件下的稳定时间通常短于固体形态，具体时限取决于浓度、缓冲体系与容器材质。是否加入防腐成分，则取决于用途是否为多次取样。
定量分析的主流方法是反相高效液相色谱联用紫外或质谱检测，利用肽在疏水固定相上的保留行为确定纯度与含量。对于生物基质中的浓度测定，常采用液相色谱串联质谱，并配合固相萃取或蛋白沉淀进行样品前处理。免疫分析法也可使用，但可能受到结构相关肽的交叉反应干扰。
纯度评估通常综合反相色谱、体积排阻色谱与质谱三方面信息：前者反映疏水性杂质，后者反映聚集体，质谱则确认分子量与主要降解产物。有关降解途径的完整图谱——例如脱酰胺、氧化与水解各占多大比例——在不同储存条件下仍有差异，属于需要逐案验证的问题。
Tirzepatide is a synthetic peptide of 39 amino acids engineered from the native glucose-dependent insulinotropic polypeptide sequence. Its structure incorporates several non-natural residues and a C-terminal segment derived from glucagon-like peptide-1, together with a C20 fatty diacid moiety attached through a linker. The lipophilic side chain promotes binding to serum albumin, which slows renal clearance after administration. The compound is classified as a dual incretin receptor agonist and is supplied as a lyophilized powder for reconstitution or as a preformulated solution, depending on the presentation.
The peptide activates two G protein-coupled receptors, GIPR and GLP-1R. Binding triggers adenylyl cyclase activity and raises intracellular cyclic AMP in pancreatic beta cells, which potentiates insulin release when glucose is elevated. Signaling in the central nervous system is associated with reduced appetite and lower energy intake, while effects on gastric emptying and glucagon secretion are also reported. Because activity at both receptors is retained, the pharmacological profile is often described as incretin-based rather than selective for a single receptor.
== See also == Style of the Dutch sovereign Regalia of the Netherlands Flags of the Dutch royal family Succession to the Dutch throne List of heirs to the Dutch throne Lists of rulers in the Low Countries Inauguration of the Dutch monarch List of Dutch royal consorts Monarchy of the Netherlands
Cu2+ + 2 e− → Cu (cathode), E°cell = 0.34 V Copper sulfate is commonly included in teenage chemistry sets and undergraduate experiments. It is often used to grow crystals in schools and in Copper electroplating experiments despite its toxicity. Copper sulfate is often used to demonstrate an exothermic reaction, in which steel wool or magnesium ribbon is placed in an aqueous solution of CuSO4. It is used to demonstrate the principle of mineral hydration. The pentahydrate form, which is blue, is heated, turning the copper sulfate into the anhydrous form which is white, while the water that was present in the pentahydrate form evaporates. When water is then added to the anhydrous compound, it turns back into the pentahydrate form, regaining its blue color. Copper(II) sulfate pentahydrate can easily be produced by crystallization from solution as copper(II) sulfate, which is hygroscopic.
=== Etymology === DuPont went through an extensive process to generate names for its new product. In 1940, John W. Eckelberry of DuPont stated that the letters "nyl" were arbitrary, and the "on" was copied from the suffixes of other fibers such as cotton and rayon. A later publication by DuPont (Context, vol. 7, no. 2, 1978) explained that the name was originally intended to be "No-Run" ("run" meaning "unravel") but was modified to avoid making such an unjustified claim. Since the products were not really run-proof, the vowels were swapped to produce "nuron", which was changed to "nilon" "to make it sound less like a nerve tonic". For clarity in pronunciation, the "i" was changed to "y". A persistent urban legend exists that the name is derived from "New York" and "London"; however, no organization in London was ever involved in the research and production of nylon.
=== Infectious disease applications === PCR allows for rapid and highly specific diagnosis of infectious diseases, including those caused by bacteria or viruses. PCR also permits identification of non-cultivatable or slow-growing microorganisms such as mycobacteria, anaerobic bacteria, or viruses from tissue culture assays and animal models. The basis for PCR diagnostic applications in microbiology is the detection of infectious agents and the discrimination of non-pathogenic from pathogenic strains by virtue of specific genes. Characterization and detection of infectious disease organisms have been revolutionized by PCR in the following ways:
Sources: en.wikipedia.org
=== Effect on the immune microenvironment === CAFs can produce cytokine TGF-β which has inhibitory effect on T cells, macrophages and neutrophils thus they are not able to promote immune response against the tumor. Immune system is greatly affected by CAFs. CAFs promote the recruitment of monocytes and induce their differentiation into pro-tumorigenic macrophage subset M2. In breast cancer secretion of monocyte chemotactic protein-1, stromal-derived factor 1 and chitinase 3-like 1 is a signal for monocyte migration and differentiation into M2 subset. Similar effect was observed in prostate carcinoma. In pancreatic cancer, other cytokines have central role in monocyte differentiation into M2 subset such as M-CSF1, IL-6 and CCL2. Other cytokines such as IL-8, IL-10, TGF-β also participate. Such M2 macrophages then further activate progression of CAFs. CAFs have inhibitory effects on NK cells by releasing prostaglandin E2 (PGE2). In hepatocellular carcinoma besides PGE2, indoleamine 2,3-dioxygenase (IDO) is suppressing NK cells. In the restriction of anti-tumor immunity are crucial regulatory T cells (Treg; Foxp3+). CAFs stimulate migration, induction and maintenance of Treg cells which depends on the chemokines CCL5 and CXCL12. Critical for anti-tumor immunity are cytotoxic CD8+ T cells. CAFs decrease their infiltration into tumor by releasing chemokine CXCL12 and cytokines IL-6 and TGF-β. However, for T cell movement restriction in tumors is also responsible hypoxia, which leads to decrease of expression of adhesion molecules on endothelial cells.
The three substrates of this enzyme are hydroxyacetylaminofluorene, reduced nicotinamide adenine dinucleotide (NADH), and a proton. Its products are 2-acetylaminofluorene, oxidised NAD+, and water. The enzyme can use nicotinamide adenine dinucleotide phosphate as an alternative cofactor. This enzyme belongs to the family of oxidoreductases, specifically those acting on other nitrogenous compounds as donors with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is 2-acetamidofluorene:NAD(P)+ oxidoreductase. Other names in common use include N-hydroxy-2-acetylaminofluorene reductase, and NAD(P)H:N-hydroxy-2-acetamidofluorene N-oxidoreductase.
Their southernmost settlements being around Schwansen, Hedeby and Husum, mirroring the same southern border as their Angle predecessors. As raiding was a frequent practice among the Danes, Saxons, and Wagrians, the borderlands was a hostile and unsafe area to inhabit. In response to these threats, the Danes began constructing the Danevirke. Originally built as a dyke, it was gradually expanded into a 30-kilometer earthwork with a palisade fortification, forming a barrier between the Danes and their southern neighbors. The Danevirke was strategically positioned at the narrowest point of the peninsula, with its eastern end beginning at the Treene River and extending to the Schlei Bay. This fortification served to deter Saxon and Wagrian raids while enabling the Danes to launch their own raids into southern territories. It would remain in use until 1864, being expanded and adapted to the changing military needs of the Danes multiple times. The establishment of the Danevirke not only helped to prevent Saxon and Wagrian raids into Danish territory but also served as a toll station. Danish chieftains would collect fees from traders, merchants, and peasants traveling along the Hærvejen (Heerweg/Armyway), the main trade route running through the peninsula. Saxons, Wagrians, and Danes alike used the Hærvejen to trade goods such as honey, furs, amber, glass, metalwork, and other commodities, such as livestock, with cattle and oxen being particularly important.
Microanalysis is the chemical identification and quantitative analysis of very small amounts of chemical substances (generally less than 10 mg or 1 ml) or very small surfaces of material (generally less than 1 cm2). One of the pioneers in the microanalysis of chemical elements was the Slovenian-Austrian Nobel Prize winner Fritz Pregl.
=== Chemical bonds === A fatty acid is characterized as either saturated or unsaturated based on the respective absence or presence of C=C double bonds in its backbone. If the molecule contains no double C=C bonds, it is said to be saturated; otherwise, it is unsaturated to some degree. The C=C double bond is rotationally rigid. If the hydrogen atoms bonded to each of the carbons in this double bond are on the same side, this is called cis, and leads to a bent molecular chain. If the two hydrogens are on opposite sides, this is called trans, and leads to a straight chain.
Sources: en.wikipedia.org
=== 4 September === One person was killed in an SAF drone strike on a market in Manawashi, South Darfur. The drone responsible was shot down by the RSF over Mershing, with RSF commanders claiming that it was a Baykar Bayraktar Akıncı drone.
Pharmacological screens to identify endogenous channels and pumps responsible for specific patterning events; Voltage-sensitive fluorescent reporter dyes and genetically encoded fluorescent voltage indicators for the characterization of the bioelectric state in vivo. Panels of well-characterized dominant ion channels that can be misexpressed in cells of interest to alter the bioelectric state in desired ways; and Computational platforms that are coming on-line to assist in building predictive models of bioelectric dynamics in tissues. Compared with the electrode-based techniques, the molecular probes provide a wider spatial resolution and facilitated dynamic analysis over time. Although calibration or titration can be possible, molecular probes are typically semi-quantitative, whereas electrodes provide absolute bioelectric values. Another advantage of fluorescence and other probes is their less-invasive nature and spatial multiplexing, enabling the simultaneous monitoring of large areas of embryonic or other tissues in vivo during normal or pathological pattering processes.
A polymer () is a substance or material that consists of very large molecules, or macromolecules, that are constituted by many repeating subunits derived from one or more species of monomers. Due to their broad spectrum of properties, both synthetic and natural polymers have essential and ubiquitous roles in everyday life. Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA and proteins that are fundamental to biological structure and function. Polymers, both natural and synthetic, are created via polymerization of many small molecules, known as monomers. Their consequently large molecular mass, relative to small molecule compounds, produces unique physical properties including toughness, high elasticity, viscoelasticity, and a tendency to form amorphous and semicrystalline structures rather than crystals. Polymers are studied in the fields of polymer science (which includes polymer chemistry and polymer physics), biophysics and materials science and engineering. Historically, products arising from the linkage of repeating units by covalent chemical bonds have been the primary focus of polymer science. An emerging important area now focuses on supramolecular polymers formed by non-covalent links. Polyisoprene of latex rubber is an example of a natural polymer, and the polystyrene of styrofoam is an example of a synthetic polymer.
Glutathione (GSH, ) is a tripeptide made of the amino acids glutamate, cysteine, and glycine. It is an antioxidant in plants, animals, fungi, and some bacteria and archaea. Glutathione is capable of preventing damage to important cellular components caused by sources such as reactive oxygen species, free radicals, peroxides, lipid peroxides, and heavy metals. It is the most abundant and important low-molecular-mass thiol within most cell types. It is synthesized by attaching cysteine to the carboxyl group of the glutamate side chain with a gamma peptide linkage, and to glycine with a normal peptide bond.
A diener is a morgue worker responsible for handling, moving, and cleaning the corpse. In the UK, the equivalent job title is "mortuary assistant", whilst the preparation, evisceration and reconstruction of the deceased is performed by an anatomical pathology technician. In the US, dieners are also referred to as "mortuary assistants" or "autopsy technicians". The word is derived from the German word Leichendiener, which literally means corpse servant (diener means servant.). A diener performs a number of tasks in medical schools and morgues. Helping a pathologist with examining and reconstructing cadavers are main tasks performed by a diener. A diener assists a pathologist or physician during an autopsy completing tasks such as handling tools and supplies cuting in to them and preparation of the deceased before and after autopsy. In addition to physical work with a pathologist and cadavers, dieners do work such as record keeping of identification and documentation of deceased in the form of items such as death certificates. In the American Moravian Church (German: Herrnhuter Brüdergemeine), the men and (particularly) the women who assist in church services (like the Lovefeast) are called "dieners", from the German title for their office, Saaldiener or "chapel servant".
Sources: en.wikipedia.org
It is a synthetic peptide of 39 amino acids bearing a lipid side chain. Its size and architecture place it outside the small-molecule class, and laboratories generally handle it with the precautions used for biologic-like molecules.
The fatty diacid side chain promotes strong binding to serum albumin, which slows clearance and yields a half-life of roughly five days. That profile supports once-weekly administration in clinical use.
In vitro assays detect activity at both the GIP and GLP-1 receptors, but the activity ratio depends on the assay system and the signalling pathway measured. The relative contribution of each receptor to clinical effects is still being characterised.
Solid material is normally kept frozen at about -20 degrees Celsius, desiccated and protected from light. Solutions are held cold and used within a defined window because degradation products accumulate over time.