ASCL4 and bronchopulmonary dysplasia: We furtherly analyzed the mRNA expression level of ferroptosis-related genes, the results showed that, compared to those from control rats, the mRNA level of p53, heme oxygenase 1 (HMOX1), glutathione (GSS), Acyl-CoA synthase long-chain family member 4 (ASCL4) in lungs from BPD rat were upregulated, the mRNA levels of ferritin heavy chain (FTH), protein kinase AMP-activated catalytic submit alpha1 (PRKAA1) and activating transcription factor 3 (ATF3) were downregulated.