Fig. 7. RAW 264.7 cells were incubated with PSP (400 μg mL⁻¹) or LPS (1 μg mL⁻¹) for 30 min. PSP induced phosphorylation of p38 MAPK and the phosphorylation of p38 MAPK was determined by Western blot. PSP induced degradation of IκB-α for 30 min and increased iNOS, COX-2 and NF-κB expression for 6 h. These results were expressed as mean ± SD, n = 3. *p < 0.05, **p < 0.01, compared to the control group.