CCAT2 and breast cancer: To further confirm the result, we transiently transfected MDA-MB-436 cells, also an ER-negative basal-like BC cell line (endogenous rs6983267 TT genotype), but with much lower levels of endogenous CCAT2 (Fig. 1c), with the G and T CCAT2 pcDNA 3.1 vectors and performed migration assays.