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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

CpG methylation of transcription factor 4 in gastric carcinoma

Jae Kyoon Joo1, Sang Hyun Kim, Ho Gun Kim

  • 1Division of Gastroenterologic Surgery, Department of Surgery, Chonnam National University Medical School, Gwangju, Korea.

Annals of Surgical Oncology
|June 30, 2010
PubMed
Abstract

Insights

Epigenetic silencing of the TCF4 gene via promoter methylation is frequent in gastric cancer, particularly in advanced stages. This methylation may drive early gastric carcinoma progression, with pyrosequencing offering a precise diagnostic tool.

Area of Science:

  • Oncology
  • Molecular Biology
  • Epigenetics

Background:

  • CpG island methylation epigenetically silences tumor-related genes in cancers like gastric carcinoma.
  • Promoter methylation of transcription factor 4 (TCF4) is implicated in gastric carcinogenesis.

Purpose of the Study:

  • To investigate the frequency and significance of TCF4 promoter methylation in gastric cancer.
  • To compare methylation-specific polymerase chain reaction (MSP) and pyrosequencing (PS) for TCF4 methylation assessment.

Main Methods:

  • Assessed TCF4 promoter methylation using MSP and PS in 120 gastric carcinoma (GC) and 40 normal gastric mucosa samples.
  • Correlated methylation status with clinicopathological features.

Main Results:

  • TCF4 methylation was detected in 75.8% of GCs, significantly higher than in normal mucosa (p < 0.05).
  • Methylation frequency increased with tumor advancement and correlated significantly with tumor size, Lauren classification, invasion depth, nodal metastasis, and TNM stage (p < 0.05).

Conclusions:

  • TCF4 inactivation by promoter methylation may contribute to early gastric carcinoma progression.
  • Pyrosequencing offers a more specific and quantitative diagnostic alternative to MSP for oncology research.

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