Comprehensive Synthesis of Amino Acid-Derived Thiazole Peptidomimetic Analogues to Understand the Enigmatic Drug/Substrate-Binding Site of P-Glycoprotein
作者:Bhargav A. Patel、Biebele Abel、Anna Maria Barbuti、Uday Kiran Velagapudi、Zhe-Sheng Chen、Suresh V. Ambudkar、Tanaji T. Talele
DOI:10.1021/acs.jmedchem.7b01340
日期:2018.2.8
53, and 109. The ATPase inhibition by these compounds was predominantly contributed by the presence of a cyclohexyl group in lieu of the 2-aminobenzophenone moiety of 1. The 4,4-difluorocyclohexyl analogues, 53 and 109, inhibited the photolabeling by [125I]-IAAP, with IC50 values of 0.1 and 0.76 μM, respectively. Selected compounds were shown to reverse paclitaxel resistance in HEK293 cells overexpressing
设计并合成了基于我们的先导化合物1的64种新的类似物,其最初目的是了解与高度复杂的P-糖蛋白(P-gp)底物结合位点结合的配体的结构要求及其对调节的影响外排泵的ATPase功能。化合物1,P-gp的ATP酶活性的刺激物,转化到ATP酶抑制性化合物39,53,和109。ATP酶抑制由这些化合物是主要贡献的环己基的代替2-氨基二苯甲酮部分的存在1。4,4-二氟环己基类似物53和109抑制了[ 125 I] -IAAP的光标记作用,IC 50值分别为0.1和0.76μM 。所选化合物显示出在过表达P-gp的HEK293细胞中逆转紫杉醇耐药性,并且相对于CYP3A4对P-gp具有选择性。诱导拟合对接突出了P-gp推定结合口袋中抑制性化合物的合理结合模式。当前的研究强调了P-gp对结合化学相似分子的严格要求。