Administration of TSG-6 siRNA EXO 25 wks into BPD mouse significantly increased the total cell count (Fig. 9a), absolute neutrophil counts (Fig. 9b) and protein leak (Fig. 9c) in the BALF of TSG-6 siRNA EXO 25 wks-injected group versus RA or scr siRNA control. Here, TNFAIP6 is linked to bronchopulmonary dysplasia.