Fig. 1

Hyperoxia induced lung injury in BPD mice. A C57BL/6 newborn mice were treated with normoxia or hyperoxia exposure from birth. Neonatal mice from the different groups were sacrificed at day 14. B Representative H&E staining of the lungs from the neonatal mice in the normoxia and hyperoxia groups. C, D lung injury was assessed by RAC and lung injure score. E Representative PAS staining of the lungs from the neonatal mice in the normoxia and hyperoxia groups. Data presented are the mean ± SD (n = 6); ** P < 0.05 vs. normoxia group