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Updated: Jun 11, 2026

Genome-Wide Analysis of DNA Methylation in Gastrointestinal Cancer
07:50

Genome-Wide Analysis of DNA Methylation in Gastrointestinal Cancer

Published on: September 18, 2020

Suppressive effect of global DNA hypomethylation on gastric carcinogenesis

Hiroyuki Tomita1, Akihiro Hirata, Yasuhiro Yamada

  • 1Department of Tumor Pathology, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu 501-1194, Japan.

Carcinogenesis
|July 13, 2010
PubMed

Insights

Global DNA hypomethylation, a common cancer alteration, was found to suppress gastric tumor development in mice. Reducing DNA methylation levels inhibited tumor incidence, size, and invasiveness, suggesting a protective role against gastric carcinogenesis.

Area of Science:

  • Oncology
  • Epigenetics
  • Molecular Biology

Background:

  • Global DNA hypomethylation and gene-specific hypermethylation are hallmarks of human neoplasia.
  • The role of global DNA hypomethylation in tumorigenesis is not fully understood, with prior studies showing varied effects.
  • This study focuses on the impact of DNA hypomethylation on gastric cancer development.

Purpose of the Study:

  • To investigate the effect of global DNA hypomethylation on gastric carcinogenesis in mouse models.
  • To determine if reducing DNA methylation levels influences the development and progression of gastric tumors.

Main Methods:

  • Utilized two distinct mouse models for gastric tumorigenesis: N-methyl-N-nitrosourea-induced and Apc(Min/+) models.
  • Genetically reduced DNA methylation levels in mice.
  • Performed histological analyses to assess tumor development and invasiveness.

Main Results:

  • Genetic reduction of DNA methylation significantly suppressed the incidence, number, and size of gastric tumors in both models.
  • Histological examination showed that DNA hypomethylation completely inhibited the development of invasive gastric tumors.
  • These findings demonstrate a strong correlation between DNA methylation levels and gastric cancer progression.

Conclusions:

  • Global DNA hypomethylation suppresses gastric carcinogenesis in mice.
  • Reducing DNA methylation levels offers a potential protective effect against gastric tumor development.
  • DNA methylation is a critical factor closely associated with gastric tumorigenesis.

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