ABCB1 and breast carcinoma: In the case of the breast carcinoma cell lines MCF-7_wt/_ADR, the methylation status of CGIs associated with the genes ABCB1, BRCA1, CDH1, DNAJC15, ESR1, GSTP1, PLAU, SULF2 and TGM2 was connected to the expression of the genes.