SYP and bronchopulmonary dysplasia: The results revealed that compared with the control group, the expression of cleaved caspase‐3 and Bax in the hippocampus of BPD mice was still significantly upregulated, while the expression of Bcl‐2, SYP, and PSD95 was strikingly downregulated (Figure 2P–U; t = 4.158, p = 0.0060 in Figure 2Q; t = 4.233, p = 0.0055 in Figure 2R; t = 5.995, p = 0.0010 in Figure 2S; t = 2.604, p = 0.0405 in Figure 2T; t = 4.466, p = 0.0043 in Figure 2U).