Potent and Selective Inhibitors of Breast Cancer Resistance Protein (ABCG2) Derived from the <i>p</i>-Glycoprotein (ABCB1) Modulator Tariquidar
作者:Matthias Kühnle、Michael Egger、Christine Müller、Anne Mahringer、Günther Bernhardt、Gert Fricker、Burkhard König、Armin Buschauer
DOI:10.1021/jm8013822
日期:2009.2.26
ABCB1 (p-gp, MDR1) and ABCG2 (BCRP) are expressed to a high extent by endothelial cells at the blood−brain barrier (BBB) and other barrier tissues and are involved in drug resistance of tumor (stem) cells. Whereas numerous ABCB1 inhibitors are known, only a few ABCG2 modulators with submicromolar activity have been published. Starting from tariquidar (4) analogues as ABCB1 modulators, minimal structural
外排泵ABCB1(p-gp,MDR1)和ABCG2(BCRP)在血脑屏障(BBB)和其他屏障组织中被内皮细胞大量表达,并参与肿瘤(干)细胞的耐药性。尽管已知许多ABCB1抑制剂,但仅公开了几种具有亚微摩尔活性的ABCG2调节剂。从作为ABCB1调节剂的tariquidar(4)类似物开始,最小的结构修饰导致急剧变化,有利于ABCG2抑制。最高效力发现当3,4-二甲氧基-2-(喹啉-3-羰基)苯甲酰基中部分4用4- methoxycarbonylbenzoyl部分带有hetarylcarboxamido组中的3位上,例如,喹啉-3-甲酰氨基(取代5,IC 50:119 nm)或喹啉-2-甲酰氨基(6,IC 50:60纳米,流式细胞米托蒽醌流出试验,拓扑替康耐MCF-7乳腺癌细胞); ABCG2相对于ABCB1的选择性约为100-500倍,并且这些化合物对ABCC2(MRP2)无活性。针对MCF-7