TNFAIP6 and bronchopulmonary dysplasia: After validating the human WJMSC-Exo immunomodulatory and regenerative effect on BPD models, BPD models and human tracheal aspirates in patients with BPD development were checked for TSG-6 RNA level change, demonstrating a significant elevation in the expression of TSG-6 in comparison with the non-BPD group.