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Nat Rev Gastroenterol Hepatol. 2017 Aug;14(8):467-478. doi: 10.1038/nrgastro.2017.53. Epub 2017 May 17.

How to stomach an epigenetic insult: the gastric cancer epigenome.

Author information

1
Cancer and Stem Cell Biology Programme, Duke-NUS Medical School, 8 College Road, 169857 Singapore.
2
Division of Epigenomics, National Cancer Centre Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
3
Cancer Therapeutics and Stratified Oncology, Genome Institute of Singapore, 60 Biopolis Street, 138672 Singapore.
4
SingHealth/Duke-NUS Institute of Precision Medicine, National Heart Centre, 5 Hospital Drive, 169609 Singapore.
5
Cancer Science Institute of Singapore, National University of Singapore, 14 Medical Drive, #12-01, 117599 Singapore.
6
Cellular and Molecular Research, National Cancer Centre, 11 Hospital Drive, 169610 Singapore.

Abstract

Gastric cancer is a deadly malignancy afflicting close to a million people worldwide. Patient survival is poor and largely due to late diagnosis and suboptimal therapies. Disease heterogeneity is a substantial obstacle, underscoring the need for precision treatment strategies. Studies have identified different subgroups of gastric cancer displaying not just genetic, but also distinct epigenetic hallmarks. Accumulating evidence suggests that epigenetic abnormalities in gastric cancer are not mere bystander events, but rather promote carcinogenesis through active mechanisms. Epigenetic aberrations, induced by pathogens such as Helicobacter pylori, are an early component of gastric carcinogenesis, probably preceding genetic abnormalities. This Review summarizes our current understanding of the gastric cancer epigenome, highlighting key advances in recent years in both tumours and pre-malignant lesions, made possible through targeted and genome-wide technologies. We focus on studies related to DNA methylation and histone modifications, linking these findings to potential therapeutic opportunities. Lessons learned from the gastric cancer epigenome might also prove relevant for other gastrointestinal cancers.

PMID:
28513632
DOI:
10.1038/nrgastro.2017.53
[Indexed for MEDLINE]

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