Synthesis of novel purpurealidin analogs and evaluation of their effect on the cancer-relevant potassium channel KV10.1
作者:Lien Moreels、Chinmay Bhat、Manuela Voráčová、Steve Peigneur、Hannah Goovaerts、Eero Mäki-Lohiluoma、Farrah Zahed、Luis A. Pardo、Jari Yli-Kauhaluoma、Paula Kiuru、Jan Tytgat
DOI:10.1371/journal.pone.0188811
日期:——
In the search for novel anticancer drugs, the potassium channel KV10.1 has emerged as an interesting cancer target. Here, we report a new group of KV10.1 inhibitors, namely the purpurealidin analogs. These alkaloids are produced by the Verongida sponges and are known for their wide variety of bioactivities. In this study, we describe the synthesis and characterization of 27 purpurealidin analogs. Structurally, bromine substituents at the central phenyl ring and a methoxy group at the distal phenyl ring seem to enhance the activity on KV10.1. The mechanism of action of the most potent analog 5 was investigated. A shift of the activation curve to more negative potentials and an apparent inactivation was observed. Since KV10.1 inhibitors can be interesting anticancer drug lead compounds, the effect of 5 was evaluated on cancerous and non-cancerous cell lines. Compound 5 showed to be cytotoxic and appeared to induce apoptosis in all the evaluated cell lines.
在寻找新型抗癌药物的过程中,钾通道 KV10.1 已成为一个有趣的癌症靶点。在此,我们报告了一组新的 KV10.1 抑制剂,即紫草素类似物。这些生物碱由马鞭草海绵产生,具有多种生物活性。在本研究中,我们介绍了 27 种紫草素类似物的合成和表征。从结构上看,中央苯环上的溴取代基和远端苯环上的甲氧基似乎能增强对 KV10.1 的活性。研究了最强类似物 5 的作用机制。研究人员观察到活化曲线向更负的电位移动以及明显的失活现象。由于 KV10.1 抑制剂可能是有趣的抗癌药物先导化合物,因此我们评估了 5 对癌症和非癌症细胞系的影响。化合物 5 具有细胞毒性,似乎能诱导所有被评估细胞株的细胞凋亡。