Experimental and Molecular Medicine

  • 제50권12호
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  • Pages.1.1-1.14
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  • 2018
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  • 1226-3613(pISSN)
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  • 2092-6413(eISSN)
생화학분자생물학회 (Korean Society for Biochemistry and Molecular Biongy)
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Whole genome MBD-seq and RRBS analyses reveal that hypermethylation of gastrointestinal hormone receptors is associated with gastric carcinogenesis

  • Kim, Hee-Jin (Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Kang, Tae-Wook (Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Haam, Keeok (Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Kim, Mirang (Personalized Genomic Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Kim, Seon-Kyu (Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Kim, Seon-Young (Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Lee, Sang-Il (Department of General Surgery, College of Medicine, Chungnam National University) ;
  • Song, Kyu-Sang (Department of Pathology, College of Medicine, Chungnam National University) ;
  • Jeong, Hyun-Yong (Internal Medicine, College of Medicine, Chungnam National University) ;
  • Kim, Yong Sung (Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB))
  • 투고 : 2018.01.10
  • 심사 : 2018.08.09
  • 발행 : 2018.12.30
⟨ 이전 논문 다음 논문 ⟩

초록

DNA methylation is a regulatory mechanism in epigenetics that is frequently altered during human carcinogenesis. To detect critical methylation events associated with gastric cancer (GC), we compared three DNA methylomes from gastric mucosa (GM), intestinal metaplasia (IM), and gastric tumor (GT) cells that were microscopically dissected from an intestinal-type early gastric cancer (EGC) using methylated DNA binding domain sequencing (MBD-seq) and reduced representation bisulfite sequencing (RRBS) analysis. In this study, we focused on differentially methylated promoters (DMPs) that could be directly associated with gene expression. We detected 2,761 and 677 DMPs between the GT and GM by MBD-seq and RRBS, respectively, and for a total of 3,035 DMPs. Then, 514 (17%) of all DMPs were detected in the IM genome, which is a precancer of GC, supporting that some DMPs might represent an early event in gastric carcinogenesis. A pathway analysis of all DMPs demonstrated that 59 G protein-coupled receptor (GPCR) genes linked to the hypermethylated DMPs were significantly enriched in a neuroactive ligand-receptor interaction pathway. Furthermore, among the 59 GPCRs, six GI hormone receptor genes (NPY1R, PPYR1, PTGDR, PTGER2, PTGER3, and SSTR2) that play an inhibitory role in the secretion of gastrin or gastric acid were selected and validated as potential biomarkers for the diagnosis or prognosis of GC patients in two cohorts. These data suggest that the loss of function of gastrointestinal (GI) hormone receptors by promoter methylation may lead to gastric carcinogenesis because gastrin and gastric acid have been known to play a role in cell differentiation and carcinogenesis in the GI tract.

키워드

과제정보

연구 과제 주관 기관 : National Research Foundation of the Korea (NRF), KRIBB

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