Previously, it has been shown that Kv11.1 channel, normally encoded by the human ether-a-go-go related gene 1 (hERG1) in heart [29], is critical in regulating cell proliferation of different cancer cell types and we found that stimulation of Kv11.1 with the pan-Kv11 activator NS1643 produced a significant inhibition of cancer cell proliferation. The gene discussed is KCNH2; the disease is cancer.