FOXF2 and infection: To investigate the roles of FOXF2 in regulating the invasive potential of BLBC cells in vitro, the immortalized non-tumorigenic basal-like mammary epithelial cell line MCF-10A and the invasive BLBC cell lines MDA-MB-231 was selected to establish stable FOXF2-knockdown cells by infection with a lentiviral vector expressing a FOXF2 shRNA (shFOXF2) or a non-target shRNA control lentiviral vector (shControl).