Synthesis and biological investigation of 2,4-substituted quinazolines as highly potent inhibitors of breast cancer resistance protein (ABCG2)
作者:Michael K. Krapf、Jennifer Gallus、Michael Wiese
DOI:10.1016/j.ejmech.2017.08.020
日期:2017.10
chemotherapy. Inhibition of the transport protein by potent and selective inhibitors might be a way to treat cancer more efficiently and improve the therapy of cancer patients. Recently we reported the synthesis of new inhibitors based on a quinazoline scaffold. In the present study more structural variations were explored. Compounds with 3,4-dimethoxy groups and meta or para nitro substituents were found
ABC转运蛋白超家族成员ABCG2的表达与多种癌症的临床结局相关,并且通常与化疗中多药耐药性(MDR)的发生有关。用有效的和选择性的抑制剂抑制转运蛋白可能是更有效地治疗癌症并改善癌症患者治疗的一种方法。 最近,我们报道了基于喹唑啉支架的新抑制剂的合成。在本研究中,探索了更多的结构变异。具有3,4-二甲氧基和间位或对位的化合物发现硝基取代基是ABCG2的高效抑制剂。最有效的化合物比AB143最好的抑制剂之一Ko143的效力高出五倍。为了确定新化合物对ABCG2的选择性,还研究了它们对ABCB1和ABCC1的抑制作用,从而鉴定了选择性抑制剂和广谱抑制剂。此外,探索了内在的细胞毒性和功效,涉及逆转对SN-38和米托蒽醌的多药耐药性。最有效的化合物能够逆转EC 50对细胞抑制剂的耐药性低于20 nM的值。另外,研究了抑制剂与ABCG2底物Hoechst 33342之间的相互作用类型,产生竞争性和非