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Bhak, Jong
The Genomics Institute of UNIST (TGI)
Research Interests
  • Geromics, genomics, bioinformatics, protein Engineering, OMICS

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Profiling age-related epigenetic markers of stomach adenocarcinoma in young and old subjects

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Title
Profiling age-related epigenetic markers of stomach adenocarcinoma in young and old subjects
Author
Kim, Byoung-ChulJeong, Hyoung OhPark, DaeuiKim, Chul-HongLee, Eun KyeongKim, Dae HyunIm, EunokKim, Nam DeukLee, SunghoonYu, Byung PalBhak, Jong HwaChung, Hae Young
Keywords
Age; DNA methylation; miRNA; RNAseq; Stomach adenocarcinoma; TCGA
Issue Date
201504
Publisher
Libertas Academica Ltd.
Citation
CANCER INFORMATICS, v.14, no., pp.47 - 54
Abstract
The purpose of our study is to identify epigenetic markers that are differently expressed in the stomach adenocarcinoma (STAD) condition. Based on data from The Cancer Genome Atlas (TCGA), we were able to detect an age-related difference in methylation patterns and changes in gene and miRNA expression levels in young (n = 14) and old (n = 70) STAD subjects. Our analysis identified 323 upregulated and 653 downregulated genes in old STAD subjects. We also found 76 miRNAs with age-related expression patterns and 113 differentially methylated genes (DMGs), respectively. Our further analysis revealed that significant upregulated genes (n = 35) were assigned to the cell cycle, while the muscle system process (n = 27) and cell adhesion-related genes (n = 57) were downregulated. In addition, by comparing gene and miRNA expression with methylation change, we identified that three upregulated genes (ELF3, IL1β, and MMP13) known to be involved in inflammatory responses and cell growth were significantly hypomethylated in the promoter region. We further detected target candidates for age-related, downregulated miRNAs (hsa-mir-124–3, hsa-mir-204, and hsa-mir-125b-2) in old STAD subjects. This is the first report of the results from a study exploring age-related epigenetic biomarkers of STAD using high-throughput data and provides evidence for a complex clinicopathological condition expressed by the age-related STAD progression. © the authors, publisher and licensee Libertas Academica Limited
URI
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DOI
http://dx.doi.org/10.4137/CIN.S16912
ISSN
1176-9351
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SLS_Journal Papers
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