This is in line with previous studies proving that KCa3.1 is highly expressed in a variety of proliferating cells [42], including smooth muscle cells, endothelial cells, lymphocytes (B- and T-cells), fibroblasts, stem cells and several cancer cells, where they participate in important cell functions, such as cell cycle progression, migration, and epithelial transport, by controlling the cell volume and the driving force for Ca2+ influx [42]–[44]. The gene discussed is KCNN4; the disease is cancer.