CREB3L1 and breast carcinoma: DCK is also overexpressed in poor outcome breast cancers, including the metastatic CREB3L1-deficient breast cancer cell lines (HCC1954, BT474, SK-BR-3, MDA-MB-231, MCF7, and T47D) and has low expression in the non-tumorigenic breast cell line MCF10A12,33.