Development of novel phenoxy-diketopiperazine-type plinabulin derivatives as potent antimicrotubule agents based on the co-crystal structure
作者:Zhongpeng Ding、Mingxu Ma、Changjiang Zhong、Shixiao Wang、Zhangyu Fu、Yingwei Hou、Yuqian Liu、Lili Zhong、Yanyan Chu、Feng Li、Cai Song、Yuxi Wang、Jinliang Yang、Wenbao Li
DOI:10.1016/j.bmc.2019.115186
日期:2020.1
The co-crystal structure of Compound 6b with tubulin was prepared and solved for indicating the binding mode and for further optimization. Based on the co-crystal structures of tubulin with plinabulin and Compound 6b, a total of 27 novel A/B/C-rings plinabulin derivatives were designed and synthesized. Their biological activities were evaluated against human lung cancer NCI-H460 cell line. The optimum
制备化合物6b与微管蛋白的共晶体结构,并对其进行解析以表明结合模式并进一步优化。基于微管蛋白与纤连蛋白和化合物6b的共晶体结构,总共设计和合成了27种新颖的A / B / C环纤连蛋白衍生物。评估其针对人肺癌NCI-H460细胞系的生物学活性。通过对三个系列衍生物的SAR研究,最佳的苯氧基-二酮哌嗪型化合物6o表现出高强的细胞毒性(IC50 = 4.0 nM),其比匹林布林(IC50 = 26.2 nM)更有效,并且与化合物6b(IC50 = 3.8 nM)相似)对抗人肺癌NCI-H460细胞系。随后,针对其他四种人类癌细胞系评估了化合物6o。微管蛋白聚合测定和免疫荧光测定均表明化合物6o可有效抑制微管聚合。此外,阐明了这些纤连蛋白衍生物的物理性质和分子对接的理论计算。基于分子对接的结果,化合物6o的结合模式类似于化合物6b。理论计算的化合物6o的LogPo / w和PCaco优于化合物6