名称 | Tariquidar |
描述 | Tariquidar (XR9576)(Kd=5.1 nM) is a specific and effective non-competitive inhibitor of P-glycoprotein. It can reverse drug resistance in MDR cell Lines. |
细胞实验 | Cells are seeded into 96-well plates at 800/well, in 100 μL of medium and incubated for 4 h at 37 ℃. Varying concentrations of modulator or solvent control (50 μL/well) are subsequently added and incubated for an additional 1 h before the addition of the cytotoxic drug. The cytotoxic drug (50 μL) is added to give a range of final concentrations in quadruplicate wells. After incubation for an additional 4 days, cell proliferation of adherent cells is assessed using the sulforhodamine B assay.(Only for Reference) |
激酶实验 | Steady-state drug accumulation assay: AuxB1 and CHrB30 cells are grown to confluency in 12-well (24 mm) tissue culture dishes and the steady-state accumulation of [3H]-vinblastine is measured. Accumulation is initiated by the addition of 0.1 μ Ci [3H]-vinblastine and unlabelled vinblastine to a final concentration of 100 nM . The accumulation of [3H]-paclitaxel is measured using 0.1 μ Ci [3H]-paclitaxel and unlabelled drug to a final concentration of 1 μM . Cells are incubated in a reaction volume of 1 mL for 60 min at 37 ℃ under 5% CO2 in order to reach steady-state. The effect of the modulators XR9576 on [3H]-ligand accumulation is investigated in the concentration range 10-9 - 10-6 M. Modulators are added from a DMSO stock giving a final solvent concentration of 0.2 % (v/v). Following cell harvesting, accumulated drug is measured by liquid scintillation counting and normalized for cell protein content. Plots of amount accumulated as a function of modulator concentration are fitted with the general dose-response equation: Y={(a-b)/(1+(X/c)d)}+b Where: Y=response; a=initial response; b=final response; c=EC50 concentration; d=slope value; X=drug concentration. |
体外活性 | Tariquidar 对P-gp具有高亲和力,Bmax值为275 pmol/mg。它与P-gp底物vinblastine和paclitaxel表现出非竞争性相互作用。Tariquidar能够将这些细胞毒药物在CHr<>/supB30细胞中的稳态积累量提高至非P-gp表达的AuxB1细胞观察到的水平,EC50值为487 nM。Tariquidar还能够通过60-70%抑制P-gp的钒酸盐敏感性ATPase活性,具有强大的IC50值43 nM。[1] 在较高浓度时,Tariquidar可能还能抑制其他抗性机制。1 μM Tariquidar能够体外消除ABCG2 (BCRP)介导的对camptothecins的抗性。[2] Tariquidar增强了包括doxorubicin、paclitaxel、etoposide和vincristine在内的多种药物的细胞毒性;在25-80 nM Tariquidar存在时,抗性完全逆转。在具有先天化疗抗性的MC26鼠结肠癌细胞系中,加入0.1 μM Tariquidar后doxorubicin的IC50降低了五倍(36对7 nM)。在获得化疗药物抗性的鼠乳腺癌、人小细胞肺癌和人卵巢癌细胞系(EMT6/AR1.0, H69/LX4和2780 AD)中,加入0.1 μM Tariquidar后体外doxorubicin IC50降低了22-150倍。在移除Tariquidar后,对P-gp的抑制作用可持续23小时。[3] 在由MCF7WT乳腺癌细胞系衍生的国家癌症研究所(NCI)/ADRRES多细胞肿瘤球模型中,Tariquidar恢复了doxorubicin和vinblastine的细胞毒性。[4] |
体内活性 | Tariquidar(2-8 mg/kg p.o.)被发现显著增强了多柔比星(5 mg/kg,i.v.)对MC26小鼠结肠癌体内的抗肿瘤活性。在人类癌症异种移植物中,XR9576(6-12 mg/kg p.o.)的共同给药完全恢复了紫杉醇、依托泊苷和长春新碱对两种高度耐药性MDR人类肿瘤异种移植物(2780AD,H69/LX4)裸鼠的抗肿瘤活性。[3] |
存储条件 | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice. |
溶解度 | H2O : < 1 mg/mL (insoluble or slightly soluble) Ethanol : < 1 mg/mL (insoluble or slightly soluble) DMSO : 1 mg/ml, Sonication is recommended.
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关键字 | Cluster of differentiation 243 | MDR1 | P-gp | inhibit | XR-9576 | Multidrug resistance protein 1 | CD243 | Inhibitor | Tariquidar | ABCB1 | P-glycoprotein | Pgp | XR 9576 |
相关产品 | Elacridar | Cinchonine | Piperine | P-gp inhibitor 1 | Glibenclamide | Atazanavir | Selamectin | Polyoxyethylene stearate | Atazanavir sulfate | Muscone | Encequidar mesylate | Verapamil |
相关库 | 抑制剂库 | 经典已知活性库 | 抗癌活性化合物库 | 抗癌化合物库 | 已知活性化合物库 | 离子通道库 | 膜蛋白靶向化合物库 | 药物功能重定位化合物库 | 抗癌临床化合物库 | 抗癌药物库 |