Figure 5: CEOs downregulated IL-1β mRNA level of lung tissues and IL-1β protein level of BALF respectively.

IL-1β mRNA expression of lung tissues (A) was assayed by real-time RT-PCR using the ΔCt method. GAPDH was used as loading controls for mRNA expressions. IL-1β level (B) of BALF was detected by ELISA. Data are expressed as mean ± standard error of the mean (*P < 0.05 versus the PM2.5 + saline group).