Design, synthesis, and biological evaluation of optimized phthalazine derivatives as hedgehog signaling pathway inhibitors
作者:Xiuhong Lu、Yuanqiu Peng、Chenglin Wang、Jun Yang、Xiaolong Bao、Qian Dong、Weili Zhao、Wenfu Tan、Xiaochun Dong
DOI:10.1016/j.ejmech.2017.06.031
日期:2017.9
design and synthesis of a series of optimized phthalazine compounds as novel hedgehog signaling pathway inhibitors. The 4-methylamino-piperidine moiety of Taladegib was replaced by different four, five or six-membered azacycle or azaspirocycle building blocks. The in vitro Gli-luciferase assay results demonstrate that the scaffold hopping in this region afforded significant influences on Hh pathway inhibition
我们在本文中报道了一系列优化的作为新的刺猬信号通路抑制剂的酞菁化合物的设计和合成。Taladegib的4-甲基氨基-哌啶部分被不同的四元,五元或六元氮杂环或氮杂螺环结构单元所取代。在体外的Gli萤光素酶测定法的结果表明,所述支架在此区域上Hh通路抑制得到显著影响跳频。发现吡咯烷-3-胺部分是药效基团酞嗪与氟取代的苯甲酰基之间的最佳连接基。同时研究了不同芳环对1-甲基-1H-吡唑的优化作用,并描述了SAR。发现许多新的衍生物对纳摩尔IC 50均显示出有效的Hh信号抑制活性价值观。在这些化合物中,化合物23b表现出最高的抑制效能,IC 50值为0.17 nM,比先导化合物Taladegib的效能高35倍,比市售药物Vismodegib的效能高23倍。选择的化合物23a和23b在体外对髓母细胞瘤细胞增殖也具有强大的抗肿瘤活性。23b在ptch +/- p53 -/-小鼠髓母细胞瘤同种异体移植模型中的体内功效也表明了令人鼓舞的结果。