Figure 2: RBE cells were treated with 200 μM EPS, 80 μM (A), 160 μM (B), 320 μM (C) of PA, or a combination of 200 μM EPS and aforementioned concentrations of PA for 24 hrs; then MTT assays were performed. Results were normalized to values from the vehicle-treated cells (*, P<0.05 versus **; #, P<0.05 versus +; #, P<0.05 versus ++; +, P>0.05 versus ++).