Identification of potential target genes in pancreatic ductal adenocarcinoma by bioinformatics analysis

被引:30
作者
Tang, Yuchen [1 ,2 ]
Zhang, Zixiang [1 ,2 ]
Tang, Yaocheng [1 ]
Chen, Xinyu [1 ]
Zhou, Jian [1 ,2 ]
机构
[1] Soochow Univ, Affiliated Hosp 1, Dept Gen Surg, 188 Shizi St, Suzhou 215006, Jiangsu, Peoples R China
[2] Soochow Univ, Affiliated Hosp 1, Pancreat Dis Res Ctr, Suzhou 215006, Jiangsu, Peoples R China
关键词
bioinformatics analysis; PDAC; differentially expressed genes; DKK1; HMGA2; WNT SIGNALING PATHWAY; THERAPEUTIC TARGET; LARGE-SCALE; DICKKOPF-1; BIOMARKER; HMGA2; RECEPTOR; TRANSITION; EXPRESSION; INHIBITOR;
D O I
10.3892/ol.2018.8912
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Pancreatic ductal adenocarcinoma (PDAC) is one of the most complicated and fatally pathogenic human malignancies. Therefore, there is an urgent need to improve our understanding of the underlying molecular mechanism that drives the initiation, progression, and metastasis of PDAC. The aim of the present study was to identify the key genes and signaling pathways associated with PDAC using bioinformatics analysis. Four transcriptome microarray datasets (GSE15471, GSE55643, GSE62165 and GSE91035) were acquired from Gene Expression Omnibus datasets, which included 226 PDAC samples and 65 normal pancreatic tissue samples. We screened differentially expressed genes (DEGs) with GEO2R and investigated their biological function by Gene Ontology (GO) and Kyoto Encyclopedia of Genes (KEGG) analysis. The overall survival data was obtained from UALCAN, which calculated the data shared with The Cancer Genome Atlas. In addition, a protein-protein interaction (PPI) network of the DEGs was constructed by STRING and Cytoscape software. The four sets of DEGs exhibited an intersection consisting of 205 genes (142 up-regulated and 63 down-regulated), which may be associated with PDAC. GO analysis showed that the 205 DEGs were significantly enriched in the plasma membrane, cell adhesion molecule activity and the Energy pathways, and glycine, serine, threonine metabolism were the most enriched pathways according to KEGG pathway analysis. Kaplan-Meier survival analysis revealed that 22 of 205 common genes were significantly associated with the overall survival of pancreatic cancer patients. In the PPI network and sub-network, DKK1 and HMGA2 were considered as hub genes with high connectivity degrees. DKK1 and HMGA2 are strongly associated with WNT3A and TP53 separately, which indicates that they may play an important role in the Wnt and P53 signaling pathways. Using integrated bioinformatics analysis, we identified DKK1 and HMGA2 as candidate genes in PDAC, which may improve our understanding of the mechanisms of the pathogenesis and integration; the two genes may be therapeutic targets and prognostic markers for PDAC.
引用
收藏
页码:2453 / 2461
页数:9
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