Identification of Epithelial-mesenchymal Transition-related Genes and Potential Biomarkers for Bronchopulmonary Dysplasia using Bioinformatical Analysis
Keywords:
bronchopulmonary dysplasia, Epithelial-mesenchymal transition, Weighted gene co-expression network analysis, Machine learning, Bioinformatical analysisAbstract
Bronchopulmonary dysplasia (BPD) is a prevalent and serious disease among preterm newborns. Epithelial-mesenchymal transition (EMT) represents the biological process where cells switch from an epithelial to mesenchymal phenotype. Hyperoxia induces EMT in alveolar epithelial cells, which can affect alveolar development. However, the specific molecular mechanism of EMT in BPD remains incompletely unclear. In this study, the GSE108754 and GSE32472 datasets were merged and de-batched, with external validation from GSE188944 and GSE51039. Differentially Expressed Genes (DEGs) were screened, focusing on those associated with EMT using the GeneCards database, resulting in the identification of 213 overlapping genes. Weighted gene co-expression network analysis (WGCNA) revealed that the turquoise module was strongly correlated with BPD, identifying 33 hub genes related to EMT in BPD patients.
Utilizing support vector machine (SVM) and random forest recursive feature elimination (RF-RFE) methods, 17 potential biomarkers were assessed. Risk prediction performance was evaluated through a nomogram model and receiver operating characteristic (ROC) analysis. Notably, FLOT2, AQP9, SEMA4A, and CXCR1 emerged as vital genes, with RT-qPCR validation indicating their mRNA levels significantly increased in BPD. In summary, four biomarkers, FLOT2, AQP9, SEMA4A, and CXCR1, were potentially critical in BPD occurrence and progression, shedding novel light on diagnosing and treating BPD.
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