PECAM1 and bronchopulmonary dysplasia: Among these genes, our data suggest that the expression of PECAM1 was regulated by let-7i, miR-322 and miR-497, and the expression of VE-cadherin and β-cadherin regulated by miR-27a.In summary, we describe the dynamic regulation of gene and miRNA expression in a hyperoxia-induced model of BPD in the mouse.