Among the Kv channel family, Kv4.1, Kv7.1 (KCNQ1), and Kv1.5 have been identified as participants in promoting the proliferation and progression of gastric cancer cells (Lee et al., 2000; Arcangeli et al., 2009; Kim et al., 2010). Here, KCNQ1 is linked to gastric cancer.