BCL3’s effects on chemosensitivity in breast cancer cells has not been explored in depth, yet in contrast to the studies demonstrating BCL3 as a biomarker of poor prognosis in breast cancer (see Table 1), one study has demonstrated a chemo-sensitizing role for BCL3 in a single cell line (MDA-MB-468) representing the BL1 subtype of triple-negative breast cancer. The gene discussed is BCL3; the disease is breast carcinoma.