Bioinformatical analysis of key genes and pathways of bronchopulmonary dysplasia based on GEO
XIE Xiangjun1, ZHANG Bo1, LYU Ying1, NING Shangwei2, QU Shuqiang1
(1. Department of Pediatrics, the Second Affiliated Hospital of Harbin Medical University, Harbin Heilongjiang 150086; 2. College of Bioinformatics Science and Technology, Harbin Medical University, Harbin Heilongjiang 150081, China)
Abstract:Objective:To explore the key genes and signal pathways of bronchopulmonary dysplasia (BPD) using bioinformatics. Methods: Data sets were screened in the gene expression omnibus (GEO) database, the GEO2R tool was used to screen the differentially expressed genes between BPD and extremely preterm infants without BPD. Functional annotation and pathway analysis were performed using the DAVID database, proteinprotein interaction (PPI) network construction of key DEGs was completed using the STRING online tool. The core genes were screened and visualized by Cytoscape software. Results: A total of 375 genes were up-regulated and 390 genes were downregulated via differential analysis. GO enrichment analysis showed that differentially expressed genes were involved in cellular response to calcium ions responsiveness, transcriptional regulation of RNA polymerase Ⅱ promoter, and heart development. KEGG enrichment analysis showed that differentially expressed genes were concentrated in glucagon signaling pathway and breast cancer signaling pathway. Ten core genes were identified from the constructed PPI network, namely JUN, FOS, SMARCA4, ATF3, EGR1, ERBB2, PPARA, FOSB, NR4A1 and IGF1. Conclusion: JUN, FOS, ATF3 and EGR1 may play an important role in the pathogenesis and development of BPD.
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