Fig. 1

Differential sensitivities of lung cancer cells to TRAIL cytotoxicity. NCI-H460 (black bars) and A549 (gray bars) cells were exposed to increasing concentrations of TRAIL (0-20 μg/mL) for 48 h, and their viability was determined based on membrane integrity. The cell viability is presented relative to vehicle treatment (PBS containing 0.1 % BSA). The data are presented as the mean ± SD of triplicate experiments. *P <0.05, **P <0.01, ***P <0.01 vs. vehicle control