A new series of N-(3,4,5-trimethoxyphenyl)-1H-pyrazolo[3,4-b]pyridin-3-amine derivatives as tubulin polymerization inhibitors were synthesized, and evaluated for the anti-proliferative activities. A structure–activity relationship study revealed that the free amino moiety of 1H-pyrazolo[3,4-b]pyridin-3-amine played an essential role in the anti-proliferative activities. Especially, compound 15c displayed
合成了一系列新的N- (3,4,5-三
甲氧基苯基) -1H-
吡唑并[3,4- b ]
吡啶-3-胺衍
生物作为微管蛋白聚合
抑制剂,并评价了其抗增殖活性。构效关系研究表明,1 H- pyrazolo[3,4- b ]pyridin-3-amine的游离
氨基部分在抗增殖活性中起重要作用。特别是,化合物15c对 MCF-7 细胞显示出最强的抗增殖作用,IC 50值为 0.067 ± 0.003 μM,并且对正常人胚胎肺 WI-38 细胞具有高选择性,IC 50值 23.41 ± 1.53 μM。进一步的机理研究表明,15c显示出很强的抗微管蛋白聚合活性,改变了微管蛋白的形态,并在 MCF-7 细胞的 G2/M 转换时阻止了细胞周期。分子对接分析表明15c很好地占据了微管蛋白的
秋水仙碱结合口袋。此外,15c显示出抗血管生成活性,可阻断迁移、侵袭和管形成,破坏新形成的管,并调节 HU
VEC 细胞中的 MMP-9