To determine whether CDCP1 has prometastatic activity, as suggested for certain human cancer histotypes [13–17], we analyzed the in vitro migration, invasion, and proliferation of 2 TNBC cell lines (BT-549 and MDA-MB-231) that highly express CDCP1 (Figure 2A), migrate, and invade, after silencing CDCP1. Here, CDCP1 is linked to cancer.