Fig. 11

Histopathological analysis in lung tissues. a-b Histopathological changes in lung tissues in the different treatment groups. a H&E staining (magnification: 200×); (b) Masson’s trichrome staining (magnification: 200×). c-d Statistical analysis of the levels of hydroxyproline and pulmonary fibrosis scores. Pulmonary fibrosis scores are expressed as the mean ± SD of experimental results, performed in triplicate. #p < 0.05 vs. the model group; **p < 0.01 vs. controls