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Updated: Jun 8, 2026

Continuous Fluorescence-Based Endonuclease-Coupled DNA Methylation Assay to Screen for DNA Methyltransferase Inhibitors
Published on: August 5, 2022
Targeting DNA methylation for epigenetic therapy
Xiaojing Yang1, Fides Lay, Han Han
1Department of Urology, Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
Abstract:
Patterns of DNA methylation are established during embryonic development and faithfully copied through somatic cell divisions. Based on current understanding of DNA methylation and other interrelated epigenetic modifications, a comprehensive view of the 'epigenetic landscape' and cancer epigenome is evolving. The cancer methylome is highly disrupted, making DNA methylation an excellent target for anticancer therapies. During the last few decades, an increasing number of drugs targeting DNA methylation have been developed to increase efficacy and stability and to decrease toxicity. The earliest and the most successful epigenetic drug to date, 5-Azacytidine, is currently recommended as the first-line treatment of high-risk myelodysplastic syndromes (MDS). Encouraging results from clinical trials have prompted further efforts to elucidate epigenetic alterations in cancer, and to subsequently develop new epigenetic therapies. This review delineates the latest cancer epigenetic models, the recent discovery of hypomethylation agents as well as their application in the clinic.
Insights
DNA methylation patterns are crucial for development but disrupted in cancer, making them a therapeutic target. New hypomethylation agents show promise in treating cancers like myelodysplastic syndromes.
Area of Science:
- Epigenetics
- Cancer Biology
- Pharmacology
Background:
- DNA methylation patterns are established during development and copied during cell division.
- The cancer epigenome, specifically the methylome, is significantly altered.
- Epigenetic modifications are increasingly recognized as key players in cancer development.
Purpose of the Study:
- To review the evolving understanding of the cancer epigenome.
- To highlight the development and clinical application of DNA methylation-targeting drugs.
- To discuss the latest cancer epigenetic models and hypomethylation agents.
Main Methods:
- Review of current literature on DNA methylation and cancer epigenetics.
- Analysis of drug development trends targeting DNA methylation.
- Examination of clinical trial data for epigenetic therapies.
Main Results:
- The cancer methylome is highly disrupted, presenting a viable target for therapies.
- 5-Azacytidine is an effective epigenetic drug, recommended for high-risk myelodysplastic syndromes (MDS).
- Numerous drugs targeting DNA methylation have been developed with improved efficacy and reduced toxicity.
Conclusions:
- Epigenetic alterations in cancer are a significant area of research.
- Hypomethylation agents represent a promising class of anticancer therapies.
- Continued research into epigenetic modifications will drive the development of novel cancer treatments.
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