KCNK9 and triple-negative breast carcinoma: In triple-negative breast cancer (TNBC), the LOI of potassium two-pore domain channel subfamily K member 9 (KCNK9) gene involving differentially methylated region (DMR) hypomethylation leads to overexpression of the gene, increasing mitochondrial membrane potential and anti-apoptotic effect (11, 12).