Sitagliptin 99.7437%
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| 包装规格: | 1g 5g 10g in glass bottle |
| 溶解性: | 溶于DMSO(≥50mg/mL ) |
| 储备液保存: | -80°C, 2 years -20°C, 1 year |
| 体内实验: | 1、请依序添加每种溶剂: 10% DMSO→40% PEG300→5% Tween-80→45% Saline Solubility: ≥ 2.5 mg/mL (6.14 mM); 澄清溶液 此方案可获得 ≥ 2.5 mg/mL(饱和度未知)的澄清溶液。 以 1 mL 工作液为例,取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中,混合均匀;再向上述体系中加入 50 μL Tween-80,混合均匀;然后再继续加入 450 μL 生理盐水 定容至 1 mL。 2、请依序添加每种溶剂: 10% DMSO→90% (20% SBE-β-CD in Saline) Solubility: ≥ 2.5 mg/mL (6.14 mM); 澄清溶液 此方案可获得 ≥ 2.5 mg/mL(饱和度未知)的澄清溶液。 以 1 mL 工作液为例,取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 900 μL 20% 的 SBE-β-CD 生理盐水水溶液 中,混合均匀。2 g SBE-β-CD(磺丁基醚 β-环糊精)粉末定容于 10 mL 的生理盐水中,完全溶解至澄清透明。 3、请依序添加每种溶剂: 10% DMSO→90% Corn Oil Solubility: 2.5 mg/mL (6.14 mM); 澄清溶液; Need heat to 60°C 此方案可获得 2.5 mg/mL的澄清溶液,此方案实验周期在半个月以上的动物实验酌情使用。 以 1 mL 工作液为例,取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中,混合均匀。 4、请依序添加每种溶剂: 2% DMSO→40% PEG300→5% Tween-80→53% Saline Solubility: ≥ 2 mg/mL (4.91 mM); 澄清溶液 <1mg/ml表示微溶或不溶。 普西唐提供的所有化合物浓度为内部测试所得,实际溶液度可能与公布值有所偏差,属于正常的批间细微差异现象。 请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液;一旦配成溶液,请分装保存,避免反复冻融造成的产品失效。 |
| 靶点: | DPP-4 |
| 体外研究: | Sitagliptin 磷酸盐对 DPP-4 具有强效抑制作用,从 Caco-2 细胞提取物中得到的 IC50 值为 19 nM。Sitagliptin 通过涉及 cAMP/PKA/Rac1 激活的途径减少分离的脾脏 CD4 T 细胞的体外迁移。Sitagliptin 通过 DPP-4 独立的、蛋白激酶 A 和 MEK-ERK1/2 依赖的途径发挥一种新颖的直接作用,以刺激肠道 L 细胞分泌 GLP-1。它降低了自身免疫对移植物存活率的影响。 |
| 体内研究: | 体内实验中,在自由喂养的 Han-Wistar 大鼠中,Sitagliptin 磷酸盐抑制血浆 DPP-4 活性的 ED50 值经计算为给药 7 小时后 2.3 mg/kg 和给药 24 小时后 30 mg/kg。链脲佐菌素诱发的 1 型糖尿病小鼠模型显示血浆中 DPP-4 水平升高,而服用 Sitagliptin 磷酸盐的小鼠的血浆 DPP-4 水平可得到显著抑制。这是通过对高血糖的积极调节实现的,可能通过延长胰岛移植存活率来实现。Sitagliptin 磷酸盐在大鼠中(40-48 mL/min/kg,7-9 L/kg)的血浆清除率和分布容积高于在狗中的(9 mL/min/kg,3 L/kg);其半衰期在大鼠中较短,为 2 小时,而在狗中为 4 小时。 |
| 激酶实验: | 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]. |
| 细胞实验: | 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 |
| 产品描述: | 一种有效的DPP4抑制剂,在Caco-2 细胞中,IC50值为19nM。 |
| 保存条件: | 2-8℃ |
| 注意事项: | 1、为了您的安全和健康,请穿实验服并戴一次性手套操作。 2、以上信息仅做参考交流之用。 |
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