DLG4 and bronchopulmonary dysplasia: The immunofluorescence results showed that at P14, the mean fluorescence intensity of PSD95 of BPD + NS group in the DG area was significantly decreased compared with that in the CON group and ROS treatment apparently improved it (Figure 6A,B; F(2,21) = 27.63, p < 0.0001 for treatment; p < 0.0001 for BPD + NS vs. CON and p = 0.0047 for BPD + NS vs. BPD + ROS in Figure 6B).