CEBPB and breast carcinoma: Based on these results, two different breast cancer cell models were used to demonstrate if P-cadherin expression could be affected by C/EBPβ: 1) MCF-7/AZ, which is an ER+/luminal type breast cancer cell line expressing moderate levels of P-cadherin, and 2) BT-20, an ER-negative/basal-like breast cancer cell line, highly positive for P-cadherin [17].