Discovery of SP-96, the first non-ATP-competitive Aurora Kinase B inhibitor, for reduced myelosuppression
作者:Naga Rajiv Lakkaniga、Lingtian Zhang、Binyam Belachew、Naresh Gunaganti、Brendan Frett、Hong-yu Li
DOI:10.1016/j.ejmech.2020.112589
日期:2020.10
Aurora Kinase B is a serine-threonine kinase known to be overexpressed in several cancers, with no inhibitors approved for clinical use. Herein, we present the discovery and optimization of a series of novel quinazoline based Aurora Kinase B inhibitors. The lead inhibitor SP-146 shows sub-nanomolar potency in Aurora B enzymatic assays (IC50 = 0.316 ± 0.031 nM). We identified the important pharmacophore
Aurora激酶B是一种丝氨酸-苏氨酸激酶,已知在几种癌症中均过表达,尚无批准用于临床的抑制剂。在这里,我们介绍了一系列新型基于喹唑啉的Aurora Kinase B抑制剂的发现和优化。铅抑制剂SP-146在Aurora B酶法测定中显示亚纳摩尔效价(IC 50 = 0.316±0.031 nM)。我们确定了重要的药效基团特征,导致针对受体酪氨酸激酶的选择性。特别是SP-146对FLT3和KIT的选择性显示> 2000倍,这对正常的造血功能很重要。这可以消除Aurora B抑制剂Barasertib的临床试验中报道的中性粒细胞减少症的不利影响,该抑制剂除Aurora B之外还抑制FLT3和KIT。SP -146的酶动力学显示出非ATP竞争性抑制作用,使其成为首创。级抑制剂。此外,SP-146在NCI60筛选中显示出选择性的生长抑制,包括MDA-MD-468(一种三阴性乳腺癌细胞系)的抑制。