Fig. 4From: Effective fraction of Bletilla striata reduces the inflammatory cytokine production induced by water and organic extracts of airborne fine particulate matter (PM2.5) in vitroEffects of PM2.5 extracts on the mRNA expression of inflammatory cytokines in RAW264.7 cells. After 18 h, mRNA expression of (a) TNF-α and (b) IL-6 in WEP (200 μg/mL)-treated RAW264.7 cells and of (c) TNF-α and (d) IL-6 in OEP (100 μg/mL)-treated RAW264.7 cells. * < 0.05, ** < 0.01 vs. control.Back to article page