Figure 4

mRNA expression of IL-17A/F in human lung explants exposed to cigarette smoking medium. (A) Human lung explants from Non-COPD subjects were cultured with 5% of CSE for 3 h. N = 10 subjects. (B) Human lung explants from COPD subjects were cultured with 10% of CSE for 6 h. N = 8 subjects. The mRNA expression of IL-17A/F was detected by real-time PCR. CSE: Cigarette smoke. ^*P < 0.05, ^**P < 0.01 compared with medium control.