As loss of FAK-induced apoptosis in the mammary tumors of cKO-Wnt1 and cKD-Wnt1 mice and FAK deletion in Wnt tumor cells in vitro resulted in reduction of the mTOR signaling pathway, we wanted to explore whether mTOR pathway is responsible for apoptosis of the Wnt tumor cells. This evidence concerns the gene WNT1 and breast cancer.