Pyridylthiazole-based ureas as inhibitors of Rho associated protein kinases (ROCK1 and 2)
作者:Roberta Pireddu、Kara D. Forinash、Nan N. Sun、Mathew P. Martin、Shen-Shu Sung、Brian Alexander、Jin-Yi Zhu、Wayne C. Guida、Ernst Schönbrunn、Saïd M. Sebti、Nicholas J. Lawrence
DOI:10.1039/c2md00320a
日期:——
Potent ROCK inhibitors of a new class of 1-benzyl-3-(4-pyridylthiazol-2-yl)ureas have been identified. Remarkable differences in activity were observed for ureas bearing a benzylic stereogenic center. Derivatives with hydroxy, methoxy and amino groups at the meta position of the phenyl ring give rise to the most potent inhibitors (low nM). Substitutions at the para position result in substantial loss of potency. Changes at the benzylic position are tolerated resulting in significant potency in the case of methyl and methylenehydroxy groups. X-Ray crystallography was used to establish the binding mode of this class of inhibitors and provides an explanation for the observed differences of the enantiomer series. Potent inhibition of ROCK in human lung cancer cells was shown by suppression of the levels of phosphorylation of the ROCK substrate MYPT-1.
新一类1-苄基-3-(4-吡啶基噻唑-2-基)脲的强效ROCK抑制剂已被鉴定出来。带有苄基不对称中心的脲在活性上表现出显著差异。在苯环的间位具有羟基、甲氧基和氨基的衍生物产生了最强大的抑制剂(低纳摩尔水平)。对位上的取代导致活性大幅度丧失。苄基位置上的变化可被容忍,特别是甲基和甲叉羟基时产生了显著的活性。通过X射线晶体学确定了这类抑制剂的结合模式,并解释了所观察到的对映体系列之间的差异。通过抑制人类肺癌细胞中ROCK底物MYPT-1的磷酸化水平,证明了强效抑制ROCK的作用。