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Updated: Jul 16, 2026

Continuous Fluorescence-Based Endonuclease-Coupled DNA Methylation Assay to Screen for DNA Methyltransferase Inhibitors
06:07

Continuous Fluorescence-Based Endonuclease-Coupled DNA Methylation Assay to Screen for DNA Methyltransferase Inhibitors

Published on: August 5, 2022

[DNA methylation and cancer]

Hirohide Yoshikawa1

  • 1Dept. of Epigenetic Carcinogenesis, The JFCR Cancer Institute.

Gan to Kagaku Ryoho. Cancer & Chemotherapy
|February 16, 2007
PubMed

Insights

Aberrant DNA methylation silences tumor suppressor genes in cancer. Inhibiting DNA methyltransferases (DNMTs) with cytidine analogues offers a potential therapeutic strategy by inducing DNA demethylation.

Area of Science:

  • Epigenetics
  • Cancer Biology
  • Molecular Oncology

Background:

  • Tumor suppressor gene silencing via DNA methylation is a hallmark of cancer development.
  • Aberrant DNA methylation is linked to histone modifications, leading to inactive chromatin and abnormal gene expression.
  • Epigenetic alterations, particularly DNA methylation, are implicated in the genome-wide deregulation of genes observed in cancer cells.

Purpose of the Study:

  • To investigate the role of aberrant DNA methylation in cancer.
  • To explore the involvement of de novo DNA methyltransferases (DNMTs) in aberrant methylation.
  • To identify potential therapeutic strategies targeting DNA methylation.

Main Methods:

  • Analysis of DNA methylation patterns in cancer cells.
  • Investigation of histone deacetylases and methyltransferases' role in epigenetic modifications.
  • Evaluation of nucleoside analogues of cytidine as inhibitors of DNMTs.

Main Results:

  • Aberrant DNA methylation is a key mechanism in cancer, silencing tumor suppressor genes.
  • De novo DNMTs, specifically DNMT3A and DNMT3B, are crucial in aberrant DNA methylation processes.
  • Cytidine nucleoside analogues demonstrated the ability to inhibit DNMT function and induce DNA demethylation in cancer cells.

Conclusions:

  • Epigenetic alterations, especially aberrant DNA methylation, contribute significantly to cancer cell characteristics.
  • Understanding the precise mechanisms of aberrant DNA methylation is critical for cancer therapy.
  • Targeting DNMTs with small molecules represents a promising avenue for developing novel anti-cancer treatments.

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