Development of novel amide–derivatized 2,4-bispyridyl thiophenes as highly potent and selective Dyrk1A inhibitors. Part II: Identification of the cyclopropylamide moiety as a key modification
作者:Sarah S. Darwish、Mohammad Abdel-Halim、Ahmed K. ElHady、Mohamed Salah、Ashraf H. Abadi、Walter Becker、Matthias Engel
DOI:10.1016/j.ejmech.2018.08.097
日期:2018.10
of amyloid plaques. However, the use of Dyrk1A inhibitors requires a high degree of selectivity over closely related kinases. In addition, the physicochemical properties of the Dyrk1A inhibitors need to be controlled to enable CNS permeability. In the present study, we optimized our previously published 2,4-bispyridyl thiophene class of Dyrk1A inhibitors by the synthesis of a small library of amide derivatives
双特异性酪氨酸磷酸化调节激酶1A(Dyrk1A)是阿尔茨海默氏病(AD)的潜在靶标,因为它在神经纤维缠结(NFT)的过表达和生成以及淀粉样斑块的积累之间建立了相关性。但是,使用Dyrk1A抑制剂需要比紧密相关的激酶具有更高的选择性。另外,需要控制Dyrk1A抑制剂的物理化学性质,以使CNS具有渗透性。在本研究中,我们通过合成一个小的酰胺衍生物库(带有烷基,环烷基以及酸性和碱性残基),优化了先前发表的2,4-双吡啶基噻吩类Dyrk1A抑制剂。在该文库中,环丙基酰胺基修饰(化合物4b)被认为对几种关键性能非常有利。4b在无细胞测定中显示出对Dyrk1A的强效性和对紧密相关激酶的选择性(IC 50:Dyrk1A = 3.2 nM; Dyrk1B = 72.9 nM和Clk1 = 270 nM),并在HeLa细胞中高效抑制了Dyrk1A活性(IC 50:43 nM),而未观察到明显的细胞毒性。此外