MTOR and breast cancer: To elucidate the possible impact of the WYE-354 mTOR inhibitor onto the malignant phenotype of BC cells in vitro, a panel of multi-origin BC cell lines, including benign (HBLAK), non-muscle invasive (BFTC-905, SW1710) and muscle invasive (T24, T24M, VM-CUB1, 253J, HT-1376) cells, were employed.