Epigenetic regulation on the gene expression signature in esophagus adenocarcinoma

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• 作者：Ting Xi^a ; ^{Piao1130@tom.com} ; Guizhi Zhang^b ; ^{zhangguizhi54321@163.com}
• 关键词：Esophagus adenocarcinoma ; Differentially expressed genes ; miRNAs ; DNA methylation
• 刊名：Pathology - Research and Practice
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：213
• 期：2
• 页码：83-88
• 全文大小：1990 K
• 卷排序：213

文摘

Understanding the molecular mechanisms represents an important step in the development of diagnostic and therapeutic measures of esophagus adenocarcinoma (NOS). The objective of this study is to identify the epigenetic regulation on gene expression in NOS, shedding light on the molecular mechanisms of NOS.MethodsIn this study, 78 patients with NOS were included and the data of mRNA, miRNA and DNA methylation of were downloaded from The Cancer Genome Atlas (TCGA). Differential analysis between NOS and controls was performed in terms of gene expression, miRNA expression, and DNA methylation. Bioinformatic analysis was followed to explore the regulation mechanisms of miRNA and DNA methylationon gene expression.ResultsTotally, up to 1320 differentially expressed genes (DEGs) and 32 differentially expressed miRNAs were identified. 240 DEGs that were not only the target genes but also negatively correlated with the screened differentially expressed miRNAs. 101 DEGs were found to be highlymethylated in CpG islands. Then, 8 differentially methylated genes (DMGs) were selected, which showed down-regulated expression in NOS. Among of these genes, 6 genes including ADHFE1, DPP6, GRIA4, CNKSR2, RPS6KA6 and ZNF135 were target genes of differentially expressed miRNAs (hsa-mir-335, hsa-mir-18a, hsa-mir-93, hsa-mir-106b and hsa-mir-21).ConclusionsThe identified altered miRNA, genes and DNA methylation site may be applied as biomarkers for diagnosis and prognosis of NOS.