Screening, synthesis, crystal structure, and molecular basis of 6-amino-4-phenyl-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitriles as novel AKR1C3 inhibitors
作者:Xuehua Zheng、Zan Jiang、Xiaolin Li、Chen Zhang、Zhe Li、Yinuo Wu、Xinhua Wang、Chao Zhang、Hai-bin Luo、Jun Xu、Deyan Wu
DOI:10.1016/j.bmc.2018.10.044
日期:2018.12
prostate cancer. Herein, an evaluation of in-house library discovered substituted pyranopyrazole as a novel scaffold for AKR1C3 inhibitors. Preliminary SAR exploration identified its derivative 19d as the most promising compound with an IC50 of 0.160 μM among the 23 synthesized molecules. Crystal structure studies revealed that the binding mode of the pyranopyrazole scaffold is different from the current
AKR1C3是去势抵抗性前列腺癌的有希望的治疗靶标。在本文中,对内部文库的评估发现取代的吡喃并吡唑是AKR1C3抑制剂的新型支架。初步的SAR探索确定其衍生化合物19d是最有前途的化合物,其IC 50为50在23个合成分子中的0.160μM。晶体结构研究表明,吡喃并吡唑支架的结合方式与目前的抑制剂不同。C4-苯基取代基上的羟基,甲氧基和硝基一起将抑制剂锚定在氧阴离子位点上,而支架的核心则显着增大,但部分占据了具有丰富氢键相互作用的SP口袋。令人惊讶的是,该抑制剂经历了构象变化,以适应AKR1C3及其同源蛋白AKR1C1。我们的结果表明,在合理设计选择性AKR1C3抑制剂时,应同时考虑受体和抑制剂的构象变化。从分子动力学模拟获得的详细结合特征有助于最终阐明6-氨基-4-苯基-1的分子基础,c ]吡唑-5-腈作为AKR1C3抑制剂,这将有助于将来合理的抑制剂设计和结构优化。