【摘 要】
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Acute lung injury(ALI)is an inflammatory pulmonary disease that can easily develop into seri-ous acute respiratory distress syndrome,which has high morbidity an
【机 构】
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Department of Anesthesiology,Shenzhen Hospital of Southern Medical University,Shenzhen 518110,China;
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Acute lung injury(ALI)is an inflammatory pulmonary disease that can easily develop into seri-ous acute respiratory distress syndrome,which has high morbidity and mortality.However,the molecular mechanism of ALI remains unclear,and few molecular biomarkers for diagnosis and treatment have been identified.In this study,we aimed to identify novel molecular biomarkers using a bioinformatics approach.Gene expression data were obtained from the Gene Expression Omnibus database,co-expressed differentially expressed genes(CoDEGs)were identified using R software,and further functional enrichment analyses were conducted using the online tool Database for Annotation,Visualization,and Integrated Discovery.A protein-protein interaction network was established using the STRING database and Cytoscape software.Lipopolysaccharide(LPS)-induced ALI mouse model was constructed and verified.The hub genes were screened and validated in vivo.The transcription factors(TFs)and miRNAs associated with the hub genes were predicted using the NetworkAnalyst database.In total,71 CoDEGs were screened and found to be mainly involved in the cytokine-cytokine receptor interactions,and the tumor necrosis factor and malaria signaling pathways.Animal experiments showed that the lung injury score,bronchoalve-olar lavage fluid protein concentration,and wet-to-dry weight ratio were higher in the LPS group than those in the control group.Real-time polymerase chain reaction analysis indicated that most of the hub genes such as colony-stimulating factor 2(Csf2)were overexpressed in the LPS group.A total of 20 TFs including nuclear respiratory factor 1(NRF1)and two miRNAs were predicted to be regulators of the hub genes.In summary,Csf2 may serve as a novel diagnostic and therapeutic target for ALI.NRF1 and mmu-mir-122-5p may be key regulators in the development of ALI.
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