Fig. 3. Effects of the SD-EH extracts on COX-2 protein expression in PMA-treated A549 cells. The cells (5×105 cells/plate) were pre-incubated for 24 h, and then treated with PMA (10 nM) and the extracts for 24 h. The protein levels of COX-2 were examined by western blotting. The data are shown as the means ± SDs from three independent experiments. ###P < 0.001 compared to the control group; **P < 0.01 and ***P < 0.001 compared to the PMA control group
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