Fig. 2

Depletion of club cells attenuated bleomycin-induced lung injury and fibrosis. a Hematoxylin and eosin staining of lung tissues from mice treated with control, naphthalene alone, bleomycin alone, and bleomycin following naphthalene. b Quantitative results of the pathological grade of lung injury. c Elastica van Gieson staining of lung tissues from the mice treated with control, naphthalene alone, bleomycin alone, and bleomycin following naphthalene on day 14. d Quantitative results of collagen deposition in the lung tissues. Data are presented as the mean ± SE of three mice in each group. *P < 0.05 and **P < 0.01. N = naphthalene alone; B = bleomycin alone; N + B = bleomycin following naphthalene