The short version of dual agonist fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-08-01. Anything still debated is marked as such rather than presented as settled.
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。
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.
Structure-activity work shows that fatty acid length, linker chemistry and the position of acylation all influence albumin affinity and receptor potency. Plasma protein binding exceeds 99 percent, which restricts distribution and slows renal clearance. Degradation proceeds largely through general proteolysis and fatty acid oxidation rather than cytochrome P450 metabolism, so exposure to common oxidative drug interactions is limited. Whether these clearance routes vary meaningfully between individuals is not fully established.
| Property | Value | Notes |
|---|---|---|
| 储存温度 | 2 至 8 摄氏度 | 固体粉末，避光密封 |
| 外观 | 白色至类白色冻干粉 | 溶解后为澄清至微乳光 |
| 溶解性 | 易溶于水性缓冲液 | 避免剧烈振荡 |
| 常规纯度方法 | 反相高效液相色谱 | 紫外或质谱检测 |
| 定量方法 | 液相色谱串联质谱 | 配合固相萃取前处理 |
Clinical development proceeded through large phase 3 programmes in type 2 diabetes and in obesity or overweight with at least one weight-related comorbidity. Regulatory approvals followed in several jurisdictions for both indications. Weekly subcutaneous dosing reflects an elimination half-life of roughly five days. Open questions include the durability of metabolic effects after treatment stops, long-term cardiovascular and hepatic outcomes beyond completed trials, and whether the dual mechanism confers benefits independent of total receptor occupancy. Published literature continues to expand on these points. Substantial uncertainty remains about interindividual variability in response.
Tirzepatide is a synthetic linear peptide of 39 amino acids that acts as a dual agonist at the glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptors. Its sequence derives from native GIP but incorporates non-natural residues and a C20 fatty diacid moiety linked to a lysine side chain. The lipophilic chain promotes albumin binding, which slows renal clearance and extends circulation time. The unmodified peptide has a molecular formula of C225H348N48O68 and a molecular mass near 4,813 daltons.
Receptor activation by tirzepatide raises intracellular cyclic AMP through Gs-coupled signalling at both targets. At the GLP-1 receptor the downstream effect includes glucose-dependent insulin release, suppressed glucagon secretion, delayed gastric emptying, and reduced appetite signalling in the hypothalamus. GIP receptor engagement adds insulinotropic activity and appears to influence lipid handling in adipose tissue. Because both receptors are stimulated at the same time, the pharmacological profile differs from that of selective GLP-1 receptor agonists, and the relative contribution of each arm remains an area of active investigation.
The peptide backbone contains 39 amino acids and includes alpha-aminoisobutyric acid residues, which are not among the standard proteinogenic set. A C20 fatty diacid moiety is attached through a linker, allowing the compound to bind serum albumin and extend its circulation time. This albumin binding is the main reason the molecule supports once-weekly administration rather than more frequent dosing. The measured molecular mass is approximately 4,813 daltons, placing it firmly in the peptide rather than small-molecule class.
Tirzepatide is a synthetic peptide that activates both the glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptors. This dual agonist profile distinguishes it from earlier incretin-based compounds that act on a single receptor. The molecule was engineered from the native GIP sequence and carries several non-natural residues that slow enzymatic breakdown. Researchers designed it to combine the insulinotropic effects of GIP signaling with the appetite and gastric-emptying effects associated with GLP-1 activation.
== Selected publications == Kiessling, Laura L.; Pohl, Nicola L. (1996-02-01). "Strength in numbers: non-natural polyvalent carbohydrate derivatives". Chemistry & Biology. 3 (2): 71–77. doi:10.1016/S1074-5521(96)90280-X. ISSN 1074-5521. PMID 8807830. Ko, Kwang-Seuk; Jaipuri, Firoz A.; Pohl, Nicola L. (2005-09-28). "Fluorous-Based Carbohydrate Microarrays". Journal of the American Chemical Society. 127 (38): 13162–13163. Bibcode:2005JAChS.12713162K. doi:10.1021/ja054811k. ISSN 0002-7863. PMID 16173741. Wacker, Michael; Feldman, Mario F.; Callewaert, Nico; Kowarik, Michael; Clarke, Bradley R.; Pohl, Nicola L.; Hernandez, Marcela; Vines, Enrique D.; Valvano, Miguel A.; Whitfield, Chris; Aebi, Markus (2006-05-02). "Substrate specificity of bacterial oligosaccharyltransferase suggests a common transfer mechanism for the bacterial and eukaryotic systems". Proceedings of the National Academy of Sciences. 103 (18): 7088–7093. Bibcode:2006PNAS..103.7088W. doi:10.1073/pnas.0509207103. ISSN 0027-8424. PMC 1459022. PMID 16641107.
== Partnerships == Towards fulfilling its mandate, RCB is collaborating with various national and international institutions of repute. The partnerships are meant for exchange of ideas, information sharing, training, networking, conducting scientific colloquia, workshops, academic exchange programmes and student study visits within (and outside) India and for students of the Asia-Pacific region. RCB and National Institute of Advanced Industrial Science and Technology (AIST), Japan announced a partnership to further capacity building initiatives in bio-imaging and biotechnology. The agreement offers an excellent opportunity for both the institutions in capacity building, training and research collaborations, benefitting young scientists not only in India and Japan, but also from the UNESCO member countries in the Asia-Pacific and SAARC regions. In its continuing effort to fulfill the core mandate, RCB is actively engaged in a range of research and related activities in partnership with other academic institutions, which form part of the NCR Biotech Science Cluster, Faridabad. Shared facilities such as Advanced Technology Platform Centre (ATPC), and Bioincubators (supported by Biotechnology Industry Research Assistance Council (BIRAC)), which is meant to support the budding biotechnology entrepreneurs, are being established.
=== Davis Cup === Zverev made his Davis Cup debut for Germany against the Czech Republic in 2016. He faced No. 7 Tomáš Berdych in his debut match and took a two sets to one lead before ultimately losing in five sets. After the Czech Republic won the doubles rubber while Kohlschreiber won both singles matches, Zverev faced Lukáš Rosol in a decisive fifth rubber. Rosol won the match easily to send the Czech Republic into the next round. In the 2017 against Belgium, Zverev recorded his first career match win in the competition against Arthur De Greef, but lost the doubles rubber with his brother as well as his second singles match to Steve Darcis. Belgium won the tie 4–1. Zverev won his first Davis Cup tie in 2018, winning both of his singles matches against Alex de Minaur and Kyrgios to lead Germany to a 3–1 victory over Australia. In the quarterfinals, Germany took a 2–1 lead against Spain behind Zverev's win over David Ferrer and a victory in doubles. However, Spain ultimately won the tie on the final day after Zverev was unable to defeat Nadal and Kohlschreiber lost a tight five-set match to Ferrer. In 2019, the format of the Davis Cup was changed to have eighteen countries competing in the finals over a single week in November, all but six of which were decided through a qualifying round in February. Germany was placed in the qualifying round and drawn against Hungary. Zverev participated and won both of his singles matches as Germany won the tie 5–0. He did not participate in the finals in November, in which Germany lost in the quarterfinals.
=== Neuronal replacement === Stem-cell therapy is used to replace damaged neurons by transplantation of stem cells into affected regions of the brain. Experiments in rat and mouse models of HD have yielded positive results. Stem cells are also used to study HD in the laboratory.
Sources: en.wikipedia.org
Processes that avoid the need for pumping tend to have overall low energy demands. Those water treatment technologies that have very low energy requirements including trickling filters, slow sand filters, gravity aqueducts. A 2021 study found that a large-scale water chlorination program in urban areas of Mexico massively reduced childhood diarrheal disease mortality rates.
== Activity == LepA exhibits uncoupled GTPase activity. This activity is stimulated by the ribosome to the same extent as the activity of EF-G, which is known to have the strongest ribosome-dependent GTPase activity among all characterized G proteins involved in translation. Conversely, uncoupled GTPase activity occurs when the ribosome stimulation of GTP cleavage is not directly dependent on protein synthesis. In the presence of GTP, LepA works catalytically. On the other hand, in the presence of the nonhydrolysable GTP – GDPNP – the LepA action becomes stoichiometric, saturating at about one molecule per 70S ribosomes. This data demonstrates that GTP cleavage is required for dissociation of LepA from the ribosome, which is demonstrative of a typical G protein. At low concentrations of LepA (less than or equal to 3 molecules per 70S ribosome), LepA specifically recognizes incorrectly translocated ribosomes, back-translocates them, and thus allows EF-G to have a second chance to catalyze the correct translocation reaction. At high concentrations (about 1 molecule per 70S ribosome), LepA loses its specificity and back-translocates every POST ribosome. This places the translational machinery in a nonreproductive mode. This explains the toxicity of LepA when it is found in a cell in high concentrations. Hence, at low concentrations LepA significantly improves the yield and activity of synthesized proteins; however, at high concentrations LepA is toxic to cells. Additionally, LepA has an effect on peptide bond formation.
=== Post‑Fight bonus increases === Beginning in January 2026, starting with UFC 324, the UFC increased its post‑fight bonus structure, raising Performance of the Night and Fight of the Night awards from $50,000 to $100,000, and introducing additional $25,000 bonuses for any knockout or submission not selected among the standard four post‑fight awards.
== History == 4-AcO-DMT and several other esters of psilocin were patented on January 16, 1963, by Sandoz via Albert Hofmann and Franz Troxler. The drug's chemical synthesis was improved by David E. Nichols and colleagues in 1999 and it was suggested as a more economical and accessible alternative to psilocybin for use in scientific research. 4-AcO-DMT was first detected as a designer drug in Europe in 2009. It became increasingly prevalent as a recreational drug in the 2010s and has been the most commonly used novel tryptamine. In the 2020s, 4-AcO-DMT became widely encountered in the form of mushroom edibles in the United States as an alternative to psilocybin and psilocybin-containing mushrooms.
===== Recreational drugs ===== The data on the use of marijuana during breastfeeding is limited; however, in part due to our lack of knowledge in this area, the CDC recommends against using marijuana or marijuana-containing products, including CBD, during breastfeeding. The main active ingredient in marijuana, tetrahydrocannabinol (THC), can be found in breastmilk anywhere from six days to more than six weeks after marijuana use. There is limited data on the long term effects of this exposure on the infant, however some studies have voiced concern regarding delayed motor development in infants exposed to THC.
Sources: en.wikipedia.org
At Mulhouse, Wenger was managed by Paul Frantz, who also had a profound impact on his career. It was he who formalised Wenger's beliefs on the importance of nutrition, isometrics and working on a player's strong points. Wenger played in midfield for Mulhouse, often positioned on the right. In their final game of the 1974–75 season, the club beat Nancy to avoid relegation, but shortly afterwards, Frantz resigned. Wenger also made the decision to leave, as the regular commutes to Mulhouse from Strasbourg overwhelmed him. In 1975, he rekindled his friendship with Hild and signed for amateur club ASPV Strasbourg (Vauban). Hild needed a midfielder "who could organise play and also have a sort of hold over the team" and decided to recruit Wenger. Vauban was formed in 1971, and made steady progress up the French football league system thereafter; Wenger's three seasons at the club culminated with promotion to the third division.
===== Bangladesh ===== American ties with Bangladesh were strained during Sheikh Hasina's rule, due to American accusations of human rights violations; India discouraged the United States from pressing too hard on these accusations to avoid giving ground to Islamist parties in future Bangladeshi elections. However, under Bangladesh's Yunus ministry, Bangladesh-US relations have improved, though Bangladesh's ties with India have worsened.
=== Enlargement === Tarlov cysts are known to have the tendency to enlarge over time. The prominent theory that explains this phenomenon reasons the enlargement of the cysts is due to the cerebrospinal fluid being pushed into the cyst during systole pulsation, but unable to get out during the diastole phase, resulting in enlargement observed in clinical settings over time. Increased ICP from trauma or other injury, childbirth, and overexertion are thought to trigger enlargement along with inflammation and hemorrhagic infiltration. With the cysts often containing a valve like mechanism fluid becomes trapped, and the meningeal sac or nerve sheath grows in size. Some patients have been diagnosed for up to 20 years with little change in size, and those with small stable cysts may avoid much progression of symptoms. Those with generally larger sacral cysts pressed along the sacrum cause the sacrum to become eroded and thin.
==== Adverse effects ==== An FDA warning in March 2014 about possible cognitive adverse effects of PCSK9 inhibition caused concern, as the FDA asked companies to include neurocognitive testing into their Phase III clinical trials.
Professors Mathematics or science: Arago, Berzelius, Biot, Curie, Frankenheim, Lehmann, Liebig, Mitscherlich, Ostwald, Pasteur, Reinitzer, Wöhler Mineralogy: Delafosse, Groth, Haüy, Neumann, Other employment: Brewster (editor), Romé de l'Isle (cataloguer), Sohncke (meteorological service), Wollaston (physician) Independently wealthy: Barlow, Herschel, Huygens In the nineteenth century there were informal schools of crystallography researchers in France (Arago, Biot, Curie, Delafosse, Haüy, Pasteur), Germany (Frankenheim, Groth, Lehmann, Liebig, Mitscherlich, Neumann, Reinitzer, Sohncke, Wöhler) and England (Barlow, Brewster, Herschel, Wollaston). Until the founding of Zeitschrift für Krystallographie und Mineralogie by Paul Groth in 1877 there was no lead journal for the publication of crystallographic papers. The majority of crystallographic research was published in the journals of national scientific societies, or in mineralogical journals. The inauguration of Groth's journal marked the emergence of crystallography as a mature science independent of geology.
Sources: en.wikipedia.org
建议在低温、避光、干燥环境中密封保存，常见条件为 2 至 8 摄氏度，长期存放可置于更低温度。应避免反复冻融，并尽量减少容器开启次数。
溶解后的稳定时间通常短于固体形态，受浓度、缓冲液和容器材质影响。冷藏条件下一般只能维持较短时间，具体期限应通过实际稳定性实验确认。
反相高效液相色谱用于纯度与含量测定，液相色谱串联质谱用于生物基质中的定量，体积排阻色谱用于检测聚集体。多种方法结合才能较完整地表征样品。
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.