The KCNK5 gene encodes TASK-2, a critical potassium channel involved in renal function, and has potential roles in preventing ischemic neurodegeneration and in breast cancer treatment (Warth et al., 2004; Heitzmann et al., 2008; Alvarez-Baron et al., 2011; Gob et al., 2015). This evidence concerns the gene KCNA3 and breast cancer.