Acridones circumvent P-glycoprotein-associated multidrug resistance (MDR) in cancer cells
作者:Vadiraj S. Gopinath、Padma Thimmaiah、Kuntebommanahalli N. Thimmaiah
DOI:10.1016/j.bmc.2007.09.020
日期:2008.1
of VLB, suggesting that they may be competitors for P-gp. All modulators effectively competing with [(3)H]azidopine for binding to P-gp pointed out this transport membrane protein as their likely site of action. Compounds at IC(10) were evaluated for their efficacy to modulate the cytotoxicity of VLB and the results showed that modulators 11, 13, 14, 16, and 17 were able to completely reverse the 25-fold
由MDR1 P-糖蛋白(P-gp)的过表达介导的多药耐药性(MDR)是癌症患者成功进行化疗的特征性最强的转运蛋白介导的障碍之一。化学增敏剂是增加多药耐药细胞对以前效果较差的药物的毒性影响的敏感性的药物。为了找到这种重要的化学增敏剂,已经合成了一系列类似的N(10)-取代的-2-氯ac啶酮(1-17)。通过邻氯苯甲酸和对氯苯胺的乌尔曼缩合,然后环化来制备化合物1。发现N-(ω-氯烷基)类似物与仲胺进行碘化物催化的亲核取代反应,并通过光谱法表征所得产物。已经确定了以log(10)P和pK(a)表示的亲脂性。检查了所有化合物增加MDR KBCh(R)-8-5细胞中长春碱(VLB)吸收的能力,结果表明,化合物6、8、11-14、16和17在各自的IC中(50)浓度比类似浓度的标准调节剂维拉帕米(VRP)引起的VLB积聚高1.0到1.7倍。流出实验的结果表明,VRP和每种调节剂均显着抑制了VLB的流