Fig. 3.

PTL attenuates the BLM-induced pulmonary fibrosis in mice. a Body weights (g) of animals after PTL treatment. b Hydroxyproline content in lung tissues. c Western blot analysis of type I collagen (Col1) and α-SMA in lung tissues was performed. GAPDH was used as a loading control. d Lung coefficient levels in the mouse model of BLM-induced PF. e-g Pulmonary function parameters including inspiratory resistance, expiratory resistance and pulmonary dynamic compliance among different groups were compared. Data are expressed as mean ± SD, *P < 0.05, **P < 0.01,***P < 0.001