Design, synthesis, biological evaluation and X-ray structural studies of potent human dihydroorotate dehydrogenase inhibitors based on hydroxylated azole scaffolds
作者:Stefano Sainas、Agnese C. Pippione、Marta Giorgis、Elisa Lupino、Parveen Goyal、Cristina Ramondetti、Barbara Buccinnà、Marco Piccinini、Rodolpho C. Braga、Carolina H. Andrade、Mikael Andersson、Ann-Christin Moritzer、Rosmarie Friemann、Stefano Mensa、Salam Al-Karadaghi、Donatella Boschi、Marco L. Lolli
DOI:10.1016/j.ejmech.2017.02.017
日期:2017.3
A new generation of potent hDHODH inhibitors designed by a scaffold-hopping replacement of the quinolinecarboxylate moiety of brequinar, one of the most potent known hDHODH inhibitors, is presented here. Their general structure is characterized by a biphenyl moiety joined through an amide bridge with an acidic hydroxyazole scaffold (hydroxylated thiadiazole, pyrazole and triazole). Molecular modelling
此处介绍了通过脚手架替换布雷奎纳的喹啉羧酸酯部分(一种最有效的已知hDHODH抑制剂)设计的新一代有效hDHODH抑制剂。它们的一般结构的特征是联苯部分通过酰胺桥与酸性羟基唑骨架(羟基化的噻二唑,吡唑和三唑)相连。分子建模表明,这些结构应采用类似brequinar的结合模式,该模式涉及与hDHODH结合位点的亚位1、2和4的相互作用。最初,研究了化合物对重组hDHODH的抑制活性。在酶促测定中,该系列中最有效的化合物是噻二唑类似物4(IC50 16 nM)。发现该活性取决于联苯部分上的氟取代模式以及杂环的选择/取代。与每个系列(4、5和6)中的一种代表性化合物共结晶的hDHODH的结构测定证实了建模所提示的类似brequinar的结合模式。使用Jurkat细胞和PHA刺激的PBMC,在基于细胞的测定抗增殖活性的试验中测试了该化合物系列所观察到的效果的特异性。通过向培养基中添加外源尿苷也证实