Figure 1. The cytotoxicity of psoralidin against human lung cancer A549 cells.

(A) Chemical structure of psoralidin. (B) Cells were treated with series concentrations of psoralidin for 24, 48, or 72 h. The cell viability was measured by MTT assay, and the data were presented as means ± SD from three independent experiments. (C) Cells were treated with 5, 10, 20 and 30 µM psoralidin for 24 h, the LDH assay were performed. ^∗P < 0.05 vs. Con and ^∗∗P < 0.01 vs. Con. Con, control.