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Updated: Feb 28, 2026

Genome-Wide Analysis of DNA Methylation in Gastrointestinal Cancer
Published on: September 18, 2020
Alteration of DNA Methylation in Gastric Cancer with Chemotherapy
Su Jin Choi1, Seok Won Jung1, Sora Huh1
1College of Pharmacy, Cancer Research Institute, Research Institute of Pharmaceutical Sciences and Institute for Microorganisms, Kyungpook National University, Daegu 41566, Republic of Korea.
Abstract:
Epigenetic alterations such as DNA methylation, histone acetylation, and chromatin remodeling can control gene expression by regulating gene transcription. DNA methylation is one of the frequent epigenetic events that play important roles in cancer development. Cancer cells can gain significant resistance to anticancer drugs and escape programmed cell death through major epigenetic changes, including DNA methylation. To date, several research groups have identified instances of both (i) hypermethylation of tumor suppressor genes, and (ii) global hypomethylation of oncogenes. These changes in DNA methylation status could be used as biomarkers for the diagnosis and prognosis of cancer patients undergoing chemotherapies or other clinical therapies. Herein, we describe genes for which methylation is dependent upon anticancer drug resistance in patients with gastric cancer; we then suggest a significant epigenetic target to focus on for overcoming anticancer drug resistance.
Insights
Epigenetic changes, particularly DNA methylation, drive cancer drug resistance. Targeting specific methylation patterns in gastric cancer may overcome resistance and improve patient outcomes.
Area of Science:
- Molecular Biology
- Cancer Research
- Epigenetics
Background:
- Epigenetic alterations, including DNA methylation, regulate gene expression and are crucial in cancer development.
- Cancer cells develop drug resistance and evade cell death through epigenetic changes like DNA methylation.
- Previous studies show hypermethylation of tumor suppressor genes and hypomethylation of oncogenes in cancer.
Purpose of the Study:
- To identify genes with methylation patterns linked to anticancer drug resistance in gastric cancer.
- To propose a novel epigenetic target for overcoming drug resistance in gastric cancer patients.
Main Methods:
- Analysis of gene methylation status in relation to anticancer drug resistance.
- Identification of specific epigenetic modifications associated with treatment outcomes.
Main Results:
- Specific genes were identified whose methylation status correlates with drug resistance in gastric cancer.
- These findings highlight the role of DNA methylation in acquired resistance to cancer therapies.
Conclusions:
- DNA methylation changes are critical mediators of anticancer drug resistance in gastric cancer.
- Targeting specific epigenetic modifications presents a promising strategy to enhance chemotherapy efficacy.
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