Typical lung sections from different staining methods.

<p>Pictures were magnified by 20×. (A) Hematoxylin&eosin (H&E) staining: showing infiltration of inflammatory cells and hypertrophy of structural cells; (B) Periodic acid-Schiff (PAS) staining: showing mucous cells (pale pink color stain); (C) average optical density (AOI) of PAS from different experimental groups; (D) Masson’s trichrome (MT) staining: showing subepithelial collagen deposition (blue colour stain); (E) average optical density (AOI) of MT stained slices from different experimental groups. All data were shown as mean ± SEM. * <i>p</i><0.05 and ** <i>p</i><0.01, significant difference compared with the saline group; # <i>p</i><0.05 and ## <i>p</i><0.01, significant difference compared with the OVA group; & <i>p</i><0.05 and && <i>p</i><0.01, significant difference between the DEHP+OVA group and the anti-TSLP group.