FOXM1 and breast cancer: We used a panel of human breast cancer cell lines and the non-tumorigenic MCF10A breast cell line that differed in their FOXM1 protein content (high to intermediate levels, DT22, MCF7, T47D, BT474, MDA-MB-453, MDA-MB-468, and MDA-MB-231 cells; and low level, MCF10A cells) to examine the effects of potential FOXM1 inhibitor compounds on cell proliferation.