Cyclohexyl-linked tricyclic isoxazoles are potent and selective modulators of the multidrug resistance protein (MRP1)
作者:Bryan H. Norman、Peter A. Lander、Joseph M. Gruber、Julian S. Kroin、Jeffrey D. Cohen、Louis N. Jungheim、James J. Starling、Kevin L. Law、Tracy D. Self、Linda B. Tabas、Daniel C. Williams、Donald C. Paul、Anne H. Dantzig
DOI:10.1016/j.bmcl.2005.08.075
日期:2005.12
These studies ultimately identified compound 21b, which reverses drug resistance to MRP1 substrates, such as doxorubicin, in HeLa-T5 cells (EC(50)=0.093microM), while showing no inherent cytotoxicity. Additionally, 21b inhibits ATP-dependent, MRP1-mediated LTC(4) uptake into membrane vesicles prepared from the MRP1-overexpressing HeLa-T5 cells (EC(50)=0.064microM) and shows selectivity (1115-fold) against
对三环异恶唑系列MRP1调节剂的结构活性关系(SAR)研究已鉴定出含有基于环己基的接头的有效和选择性抑制剂。这些研究最终确定了化合物21b,该化合物可逆转HeLa-T5细胞中对MRP1底物(如阿霉素)的抗药性(EC(50)= 0.093microM),而没有表现出固有的细胞毒性。此外,21b抑制ATP依赖的MRP1介导的LTC(4)吸收到由表达MRP1的HeLa-T5细胞(EC(50)= 0.064microM)制备的膜囊泡中,并显示出对相关转运蛋白的选择性(1115倍)。 HL60 / Adr和HL60 / Vinc细胞中的P-糖蛋白。最后,当与溶瘤性MRP1底物长春新碱联合给药时,21b在体内过表达MRP1的肿瘤中显示出肿瘤消退和生长延迟。