TNFAIP6 and bronchopulmonary dysplasia: Administration of TSG-6 NAb in BPD significantly increased the total cell count (Fig. 8a), infiltration of neutrophils (Fig. 8b) and protein leak (Fig. 8c) in the BALF of TSG-6 NAb-injected group versus RA or Isotype IgG control, thus demonstrating increased hyperoxia-induced alveolar-capillary leakage and disrupted alveolar-capillary barrier in the lung.