Figure 3

The airway inflammation as demonstrated in (a) bronchoalveolar lavage fluid (BALF) and (b) airway hyper-responsiveness in acute SNP exposure models. *P<0.05 between two variables; #P<0.05 compared with others. M-SNP, mesoporous silica nanoparticle; P-SNP, PEGylated silica nanoparticle; RL, resistance of lung; S-SNP, spherical silica nanoparticle.