Fig. 1

The effect of GA on LPS-induced WI-38 cell death. aWI-38 cells were cultured in vitro, and incubated with Gambogic acid (GA) at concentrations of 0, 1, 2, 5, 10, 20, 50, 100, 200 and 500 nM for 24h. Then, potential cell death caused by GA was characterized using a viability assay (* P < 0.05). bAfter GA pre-incubation, WI-38 cells were treated with 10mg/ml lipopolysaccharide (LPS) for 24h. Again, potential cell death was characterized using a viability assay (* P < 0.05)