Effects of PFE and DP2 treatment on BEAS-2B cell viability.

<p>Cells were cultured in a 24-well plate (4×10⁴ cells/mL) with serum-free medium for 16 h, then (A) treated with serial concentrations of PFE (10, 20, 30, 50 and 100 µg/mL) for 24 h, or (B) pretreated with 50 µg/mL PFE for 1 h and following treated with 20 µg/mL DP2 for 24 h. After the treatments, cell viability was determined by MTT assay. The data were presented as means ± SD of three independent experiments. n.s., not significant as compared to DMSO (A) or control (B).