Selleck Chemicals美国品牌，中国库存现货，Phosphorylase抑制剂，CAS#186392-40-5。
更多详情请访问中国唯一官方网站：http://www.selleck.cn/products/cp-91149.html
生物活性
| 产品描述 | CP-91149在有葡萄糖存在时，选择性抑制糖原磷酸化酶，IC50为0.13 μM，在无葡萄糖存在时，作用效果低5到10倍。 |
| 靶点 | GP | | | | | |
| IC50 | 0.13 μM [1] | | | | | |
| 体外研究 | CP-91149 displays 200-fold higher inhibitory activity against human liver glycogen phosphorylase a (HLGPa) than caffeine (IC50 = 26 μM). CP-91149 (10-100 μM) inhibits glucagon-stimulated glycogenolysis in isolated rat hepatocytes in a dose-dependent manner, and in primary human hepatocytes with IC50 of ~2.1 μM. [1] CP-91149 also potently inhibits the activities of human muscle phosphorylase a and b with IC50 of 0.2 μM and ~0.3 μM, respectively. CP-91149 treatment at 2.5 μM induces inactivation of phosphorylase and sequential activation of glycogen synthase in hepatocytes, and increases glycogen synthesis by 7-fold at 5 mM glucose and by 2-fold at 20 mM glucose. CP-91149 can partially counteract the effects of phosphorylase overexpression. [2] CP-91149 also potently inhibits brain GP with IC50 of 0.5 μM in A549 cells. CP-91149 treatment at 10-30 μM causes significant glycogen accumulation in A549 and HSF55 cells. CP-91149 treatment increases G1-phase cells with a significant reduction of the S-phase population in HSF55 cells, correlated with increased expression of p21 and p27. [3] CP-91149 also promotes the dephosphorylation and activation of GS (glycogen synthase) in non-engineered or GP-overexpressing cultured human muscle cells, but exclusively in glucose-deprived cells. [4] |
| 体内研究 | Oral administration of CP-91149 to diabetic ob/ob mice at 25-50 mg/kg causes rapid (3 hours) glucose lowering by 100-120 mg/dl without producing hypoglycemia, resulting from inhibition of glycogenolysis in vivo. CP-91149 treatment does not lower glucose levels in normoglycemic, nondiabetic mice. [1] In the non-fasted Goto-Kakizaki (GK) rats, administration of CP-91149 in combination with CS-917 suppresses hepatic glycogen reduction by CS-917 and decreases plasma glucose more than single administration of CS-917. [5] |
| 临床实验 | |
| 特征 | |
推荐的实验操作(此推荐来自于公开的文献所以Selleck并不保证其有效性)
激酶实验: [1]
| Phosphorylase enzyme assay | Human liver glycogen phosphorylase a (HLGPa, 85 ng) activity is measured in the direction of glycogen synthesis by the release of phosphate from glucose-1-phosphate at 22°C in 100 μL of buffer containing 50 mM Hepes (pH 7.2), 100 mM KCl, 2.5 mM EGTA, 2.5 mM MgCl2, 0.5 mM glucose-1-phosphate, and 1 mg/mL glycogen. Phosphate is measured at 620 nm, 20 minutes after the addition of 150 μL of 1 M HCl containing 10 mg/mL ammonium molybdate and 0.38 mg/mL malachite green. Increasing concentrations of CP-91149 are added to the assay in 5 μL of 14% DMSO. |
细胞试验: [3]
| 细胞系 | HSF55 and T98G |
| 浓度 | Dissolved in DMSO, final concentrations ~50 μM |
| 处理时间 | 72 hours |
| 方法 | Cells are exposed to various concentrations of CP-91149 for 72hours. Viability is determined with manual cell counts following staining with trypan blue exclusion assay. Cells are fixed with 70% ethanol. DNA is stained with propidium iodide and the intensity of fluorescence is measured using a Becton-Dickinson flow cytometer at 488nm for excitation and at 650nm for emission. The cell cycle profile is analyzed using Modifit's Sync Wizard. |
动物实验: [1]
| 动物模型 | Obese, diabetic male C57BL/6J-Lep(ob/ob) mice and their lean, nondiabetic C57BL/6J-/+ littermates |
| 配制 | Formulated in vehicle consisting of either 0.25% (wt/vol) methyl cellulose in water or 0.1% Pluronic P105 Block Copolymer Surfactant in 0.1% saline |
| 剂量 | ~50 mg/kg |
| 给药处理 | Orally |
温馨提示：不可用于临床治疗。
