A, The given cell lines were treated with the indicated concentrations of BKM120 for 12 h. B, H1299 cells were treated with 2 µM BKM120 for different times as indicated. C, H157 cells were treated with the indicated concentrations of BKM120 or LY294002 for 8 h. D, The given cell lines were treated with the indicated concentrations of TRAIL for 6 h. E, The given cell lines were treated with 2 µM BKM120 alone, 50 ng/ml TRAIL alone and BKM120 plus TRAIL for 6 h. After these treatments, the cells were harvested for preparation of whole-cell protein lysates and subsequent Western blot analysis to detect the indicated proteins.