Synthesis, biological evaluation and molecular docking of novel 5-phenyl-1H-pyrazol derivatives as potential BRAFV600E inhibitors
作者:Jing-Jun Dong、Qing-Shan Li、Shu-Fu Wang、Cui-Yun Li、Xin Zhao、Han-Yue Qiu、Meng-Yue Zhao、Hai-Liang Zhu
DOI:10.1039/c3ob40776d
日期:——
The RAF–MEK–ERK cascade appears to be intimately involved in the regulation of cell cycle progression and apoptosis. The BRAFV600E mutant results in constitutive activation of the ERK pathway, which can lead to cellular growth dysregulation. A series of 5-phenyl-1H-pyrazol derivatives (3a–5e) have been designed and synthesized, and their biological activities were evaluated as potential BRAFV600E inhibitors. All the compounds were reported for the first time except 3e, and compound 1-(4-bromo-2-hydroxybenzyl)-3-phenyl-1-(5-phenyl-1H-pyrazol-3-yl)urea (5c) displayed the most potent inhibitory activity (BRAFV600E IC50 = 0.19 μM). Antiproliferative assay results indicated that compound 5c possessed high antiproliferative activity against cell lines WM266.4 and A375 in vitro, with IC50 values of 1.50 and 1.32 μM, respectively, which were comparable with the positive control vemurafenib. Docking simulations showed that compound 5c binds tightly to the BRAFV600E active site and acts as BRAFV600E inhibitor. A 3D-QSAR model was also built to provide more pharmacophore understanding towards designing new agents with more potent BRAFV600E inhibitory activity.
RAF-MEK-ERK级联反应似乎与细胞周期进程和细胞凋亡的调控密切相关。BRAFV600E突变体导致ERK通路的持续激活,这可能导致细胞生长失调。设计并合成了一系列5-苯基-1H-吡唑衍生物(3a–5e),并评估了它们作为潜在BRAFV600E抑制剂的生物活性。除3e外,所有化合物均为首次报道,其中化合物1-(4-溴-2-羟基苄基)-3-苯基-1-(5-苯基-1H-吡唑-3-基)尿素(5c)显示出最强的抑制活性(BRAFV600E IC50 = 0.19 μM)。抗增殖实验结果表明,化合物5c在体外对WM266.4和A375细胞系具有高抗增殖活性,IC50值分别为1.50和1.32 μM,且与阳性对照药物维莫非尼相当。对接模拟显示,化合物5c紧密结合BRAFV600E活性位点并作为BRAFV600E抑制剂。同时构建了一个3D-QSAR模型,以提供更多药效团理解,从而设计出具有更强BRAFV600E抑制活性的新的药物。