Peptide inhibitors of the Keap1–Nrf2 protein–protein interaction with improved binding and cellular activity
作者:Rowena Hancock、Marjolein Schaap、Helene Pfister、Geoff Wells
DOI:10.1039/c3ob40249e
日期:——
Inhibitors of the Keap1âNrf2 proteinâprotein interaction (PPI) have been proposed as potential anti-inflammatory and cancer chemopreventive agents. Such compounds have the potential to increase the intracellular concentrations of Nrf2 in a reversible manner and consequently increase the expression of a battery of gene products with antioxidant response elements (AREs) in their promoter region. In this manuscript we describe the development of peptide inhibitors with modified C- and N-termini and reduced overall charge. The activity of the compounds in inhibiting the PPI and in cellular assays of Nrf2 function are described. Compound 10 has potent activity (IC50 = 22 nM) in a cell-free fluorescence polarisation assay and induced the expression of Nrf2 dependent gene products in cells, suggesting that it has potential as a lead molecule for the development of peptidomimetic inhibitors.
Keap1-Nrf2蛋白-蛋白相互作用(PPI)抑制剂被认为是潜在的抗炎和癌症化学预防药物。这类化合物有可能以可逆的方式增加细胞内 Nrf2 的浓度,从而增加启动子区含有抗氧化反应元件(AREs)的一系列基因产物的表达。在这篇手稿中,我们介绍了经过修饰的 C 端和 N 端以及整体电荷减少的多肽抑制剂的开发情况。文中描述了这些化合物在抑制 PPI 和细胞检测 Nrf2 功能方面的活性。化合物 10 在无细胞荧光偏振试验中具有强效活性(IC50 = 22 nM),并能诱导细胞中 Nrf2 依赖性基因产物的表达,这表明它有潜力成为开发拟肽抑制剂的先导分子。