C8-substituted pyrido[3,4-d]pyrimidin-4(3H)-ones: Studies towards the identification of potent, cell penetrant Jumonji C domain containing histone lysine demethylase 4 subfamily (KDM4) inhibitors, compound profiling in cell-based target engagement assays
作者:Yann-Vaï Le Bihan、Rachel M. Lanigan、Butrus Atrash、Mark G. McLaughlin、Srikannathasan Velupillai、Andrew G. Malcolm、Katherine S. England、Gian Filippo Ruda、N. Yi Mok、Anthony Tumber、Kathy Tomlin、Harry Saville、Erald Shehu、Craig McAndrew、LeAnne Carmichael、James M. Bennett、Fiona Jeganathan、Paul Eve、Adam Donovan、Angela Hayes、Francesca Wood、Florence I. Raynaud、Oleg Fedorov、Paul E. Brennan、Rosemary Burke、Rob L.M. van Montfort、Olivia W. Rossanese、Julian Blagg、Vassilios Bavetsias
DOI:10.1016/j.ejmech.2019.05.041
日期:2019.9
profiling in two orthogonal target engagement assays revealed a significant reduction from biochemical to cell-based activity across multiple analogues; this decrease was shown to be consistent with 2OG competition, and suggests that sub-nanomolar biochemical potency will be required with C8-substituted pyrido[3,4-d]pyrimidin-4(3H)-one compounds to achieve sub-micromolar target inhibition in cells.
鉴定出在KDM4和KDM5亚家族之间不同的组蛋白底物结合位点上的残基。随后,设计了一个C8取代的吡啶并[3,4- d ]嘧啶-4(3 H)-一个系列,以合理利用组蛋白底物结合位点之间的这些残基差异,以提高对KDM4亚家族的亲和力。 -亚家族酶。特别地,靶向残基E169和V313(KDM4A编号)。另外,研究了柔性吡啶并嘧啶酮C8-取代基的构象限制。这些方法产生了有效且细胞渗透性的双重KDM4 / 5-亚家族抑制剂,包括19a(KDM4A和KDM5B Ki分别为0.004和0.007μM)。在两个正交的靶标参与试验中进行的复合细胞分析显示,多种类似物从生化活性到基于细胞的活性均显着降低。该下降表明与2OG竞争一致,并表明将C8取代的吡啶并[3,4- d ]嘧啶-4(3 H)-one化合物需要亚纳摩尔的生化能力才能达到亚微摩尔的目标细胞中的抑制作用。