VEGFA and bronchopulmonary dysplasia: A large number of literatures show that the pathogenesis of BPD is attributed to some important protein and signaling pathways, such as angiotensin-converting enzyme, mannose-binding lectin, nuclear factor kappa B, phosphatidyl inositol-3-enzyme-serine/threonine kinase (PI3K-AKT) signaling pathway, interleukin (IL), vascular endothelial growth factor (VEGF).[5,6,7,8] Although a large number of transcription factors or signaling proteins have been discovered, studies on these transcription factors tend to be more conservative.