Expression of the voltage-gated potassium channel KV10.1 (Eag1) has been detected in over 70% of human cancers, making the channel a promising new target for new anticancer drug discovery. A new structural class of KV10.1 inhibitors was prepared by structural optimisation and exploration of the structure–activity relationship of the previously published hit compound ZVS-08 (1) and its optimised analogue 2. The potency and selectivity of the new inhibitors between KV10.1 and hERG were investigated using whole-cell patch-clamp experiments. We obtained two new optimised KV10.1 inhibitors, 17a and 18b, with improved nanomolar IC50 values of 568 nM and 214 nM, respectively. Compound 17a exhibited better ratio between IC50 values for hEAG1 and hERG than previously published diarylamine inhibitors. Compounds 17a and 18b moderately inhibited the growth of the KV10.1-expressing cell line MCF-7 in two independent assays. In addition, 17a and 18b also inhibited the growth of hERG-expressing Panc-1 cells with higher potency compared with MCF-7 cells. The main obstacle for newly developed diarylamine KV10.1 inhibitors remains the selectivity toward the hERG channel, which needs to be addressed with targeted drug design strategies in the future.
超过 70% 的人类癌症中都检测到电压门控
钾通道 KV10.1 (Eag1) 的表达,这使得该通道有望成为抗癌新药研发的新靶点。通过对之前发表的热门化合物 ZVS-08 (1) 及其优化类似物 2 的结构优化和结构-活性关系探索,制备了一类新结构的 KV10.1 
抑制剂。我们利用全细胞膜片钳实验研究了新
抑制剂在 KV10.1 和 hERG 之间的效力和选择性。我们获得了两种新的优化 KV10.1 
抑制剂 17a 和 18b,它们的纳摩尔 IC50 值分别为 568 nM 和 214 nM。与以前发表的二芳基胺
抑制剂相比,化合物 17a 对 hEAG1 和 hERG 的 IC50 值之间的比率更好。在两项独立的试验中,化合物 17a 和 18b 中度抑制了表达 KV10.1 的
细胞系 MCF-7 的生长。此外,与 MCF-7 细胞相比,17a 和 18b 还能以更高的效力抑制表达 hERG 的 Panc-1 细胞的生长。新开发的二芳基胺 KV10.1 
抑制剂的主要障碍仍然是对 hERG 通道的选择性,这需要在未来通过靶向药物设计策略来解决。