Fig. 6

TLR2 and TLR4 expression on the surface of primary bronchial epithelial cells (PBEC) and macrophages (MQ) after exposure to diesel exhaust particles (DEP). PBEC (A) and MQ (B) were identified by anti-CD 68-PE-Cy7. A representative mean fluorescence intensity (MFI) of 9 experiments is shown (A (a&b), B (a&b)); the expression of TLR2 (A (c)) and TLR4 (A (d)) on surface of PBEC in PBEC-ALI and PBEC-AL/MQ was presented as median and 25^th -75^th percentiles (N = 9); *, **: P < 0.05, 0.01 VS Sham exposure; ##: P < 0.01 VS PBEC-ALI. The expression of TLR2 (B (c)) and TLR4 (B (d)) on surface of MQ which have been co-cultured with PBEC was presented as median and 25^th -75^th percentiles (N = 9); *: P < 0.05 VS Sham exposure; Exposure: sham: clean air; DEP: 12.7 μg/cm²