According to our results, the levels of tumour necrosis factor‐α (TNF‐α), malondialdehyde (MDA), myeloperoxidase (MPO), GATA binding protein 3 (GATA3) and caspase‐3 in the ALI group significantly increased compared to the control group, and the levels of superoxide dismutase (SOD), glutathione peroxidase (GPX), total antioxidant capacity (TAC), interleukin‐10 (IL‐10), forkhead box protein 3 (FOXP3), and T‐bet decreased. This evidence concerns the gene MPO and acute respiratory distress syndrome.