Sitagliptin
作者：齊岳
發(fā)布時(shí)間：2023-09-11
09:07:11
點(diǎn)擊數(shù)：
產(chǎn)品名稱：Sitagliptin
產(chǎn)品描述：
| 產(chǎn)品描述 | Sitagliptin, a new oral hypoglycemic (anti-diabetic drug), is a new dipeptidyl peptidase-4 (DPP-4) inhibitor. This enzyme-inhibiting drug is used either alone or in combination with metformin or thiazolidinedione for treatment of type 2 diabetes mellitus. The drug can competitively inhibit a protein/enzyme and DPP-4, that leads to an incremental amount of active incretins (GLP-1 and GIP), the diminished amount of release of glucagon and increased release of insulin. |
| 靶點(diǎn)活性 | DPP-4:18 nM |
| 體外活性 | Sitagliptin phosphate exhibits a potent inhibitory effect on DPP-4 with IC50 of 19 nM from Caco-2 cell extracts[1]. Sitagliptin reduces in vitro migration of isolated splenic CD4 T-cells via a pathway involving cAMP/PKA/Rac1 activation[2]. Stagliptin exerts a novel, direct action in order to stimulate GLP-1 secretion by the intestinal L cell through a DPP-4-independent, protein kinase A- and MEK-ERK1/2-dependent pathway. It reduces the effect of autoimmunity on graft survival[3]. |
| 體內(nèi)活性 | In vivo, the ED50 value of sitagliptin phosphate for inhibition of plasma DPP-4 activity is calculated to be 2.3 mg/kg 7 hour postdose and 30 mg/kg 24 hour postdose in freely fed Han-Wistar rats[1].?The streptozotocin-induced type 1 diabetes mouse model exhibits elevated DPP-4 levels in the plasma that can be substantially inhibited in mice on an Sitagliptin phosphate diet. This is achieved by a positive effect on the regulation of hyperglycemia, potentially through prolongation of islet graft survival[4]. The plasma clearance and volume of distribution of Sitagliptin phosphate are higher in rats (40-48 mL/min/kg, 7-9 L/kg) than in dogs (9 mL/min/kg, 3 L/kg); and its half-life is 2 hours in rats which is shorter compared to 4 hours in dogs[5]. |
| 激酶實(shí)驗(yàn) | DPP-4 is extracted from confluent Caco-2 cells. After 5 minutes of incubation at room temperature with lysis buffer (10 mM Tris-HCl, 150 mM NaCl, 0.04 U/mL aprotinin, 0.5% Nonidet P40, pH 8.0), cells are centrifuged at 35,000 g at 4°C for 30 minutes, and the supernatant is stored at -80°C. Assays are performed by mixing 20 μL of appropriate compound dilutions with 50 μL of the substrate for the DPP-4 enzyme, H-Ala-Pro-7-amido-4-trifluoromethylcoumarin (final concentration in the assay, 100 μM) and 30 μL of the Caco-2 cell extract (diluted 1000-fold with 100 mM Tris-HCl, 100 mM NaCl, pH 7.8). Plates are incubated at room temperature for 1 hour, and fluorescence is measured at excitation/emission wavelengths of 405/535 nm using a SpectraMax GeminiXS. Dissociation kinetics of inhibitors from the DPP-4 enzyme is determined after a 1-hour preincubation of Caco-2 cell extracts with high inhibitor concentrations (30 nM for BI 1356, 3 μM for vildagliptin). The enzymatic reaction is started by adding the substrate H-Ala-Pro-7-amido-4-trifluoromethylcoumarin after a 3000-fold dilution of the preincubation mixture with assay buffer. Under these conditions, the difference in DPP-4 activity at a certain time point in the presence or absence of an inhibitor reflects the amount of this inhibitor still bound to the DPP-4 enzyme. Maximal reaction rates (fluorescence units/seconds ×1000) at 10-minute intervals are calculated using the SoftMax software of the SpectraMax and corrected for the rate of an uninhibited reaction [(vcontrol-vinhibitor)/vcontrol]. |
| 細(xì)胞實(shí)驗(yàn) | CD4T-cells are plated on membrane inserts in serum-free RPMI 1640, and cell migration is assayed using Transwell chambers (Corning), in the presence or absence of purified porcine kidney DPP-4 (32.1 units/mg; 100 mU/mL final concentration) and DPP-4 inhibitor (100 μM). After 1 hour, cells on the upper surface are removed mechanically, and cells that have migrated into the lower compartment are counted. The extent of migration is expressed relative to the control sample. |
| 別名 | 西他列汀, MK0431, 西格列汀 |
| 分子量 | 407.32 |
| 分子式 | C16H15F6N5O |
| CAS No. | 486460-32-6 |
存儲
| Powder: -20°C for 3 years | In solvent: -80°C for 2 years
溶解度
DMSO: 198.9 mM
( < 1 mg/mL refers to the product slightly soluble or insoluble )
聯(lián)系我們：
郵箱：2519696869@qq.com
QQ: 2519696869
電話：18066853083
微信：18066853083
公司介紹：
西安齊岳生物科技有限公司是集化學(xué)科研和定制與一體的高科技化學(xué)公司。業(yè)務(wù)范圍包括化學(xué)試劑和產(chǎn)品的研發(fā)、生產(chǎn)、銷售等。涉及產(chǎn)品為通用試劑的分銷、非通用試劑的定制與研發(fā)，涵蓋生物科技、化學(xué)品、中間體和化工材料等領(lǐng)域。
主營產(chǎn)品：COF、MOF單體系列：三蝶烯衍生物、金剛烷衍生物、四苯甲烷衍生物、peg、上轉(zhuǎn)換、石墨烯、光電材料、點(diǎn)擊化學(xué)、凝集素、載玻片、蛋白質(zhì)交聯(lián)劑、脂質(zhì)體、蛋白、多肽、氨基酸、糖化學(xué)等。
