The present invention relates to a composition for improving, preventing or treating peroxic lung disease comprising the WKYMVm peptide as an active ingredient, and confirmed the FPR2 activity and ERK phosphorylation effect of the composition, together with the peroxygenated lung disease. The model has been shown to improve alveolarization and angiogenesis. It is expected to be useful for the improvement, prevention or treatment of peroxic lung disease, especially bronchopulmonary dysplasia.
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