Fig. 2. The anti-inflammatory effects of R. rugosa organ extracts on PM10-stimulated RAW 264.7 cells. The effects of each extract on nitric oxide production (A) and cell viability (B) in PM10-stimulated RAW 264.7 cells. Dimethyl sulfoxide--treated samples were used as the mock group. Values represent the mean ± SE of three independent experiments. Different letters indicate significant differences according to Duncan’s multiple range test (p < 0.05)