As shown in Fig. 4C, after receiving an injection of oe-GAB1 vector, the neonatal mice with hyperoxia-induced BPD exhibited increased number of alveoli in lung tissues together with reduced alveolar space and decreased alveoli fusion when compared with those treated with oe-NC vector (p < 0.05). The gene discussed is GAB1; the disease is bronchopulmonary dysplasia.