AKT1 and bronchopulmonary dysplasia: In a recent study, the researchers found that the expression level of hsa-miR-103a-3p related to the phosphatidylinositol 3-kinase/protein kinase B (PI3K/Akt) signaling pathway was decreased in UCB-derived exosomes from the BPD group compared with the NBPD group [16].