ILK and breast cancer: To study whether inhibition of ILK causes reduced breast cancer cell viability, seven human breast cancer cell lines (BT474, SKBR-3, KPL-4, MDA-MB/468, MCF-7, LCC6 and LCC6Her2) were exposed to serial dilutions (ranging from 1 to 256 μM) of the small molecule inhibitor of ILK, 267.