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DNA methylation and epigenetic defects in carcinogenesis
1Genetics Division, National Institute for Medical Research, London, Great Britain.
Mutation Research
|December 1, 1987
Summary
DNA-damaging agents may cause cancer not just by mutation, but by altering DNA methylation, a key epigenetic control. This epigenetic alteration can lead to heritable changes in gene expression and potentially cancer.
Area of Science:
- Epigenetics
- Molecular Biology
- Cancer Research
Background:
- Carcinogenesis is often attributed to DNA mutations.
- DNA methylation is a critical epigenetic mechanism regulating gene expression in mammalian cells.
Purpose of the Study:
- To explore the role of DNA methylation changes as a mechanism for chemical carcinogenesis.
- To investigate if carcinogens can alter epigenetic controls leading to heritable phenotypes.
Main Methods:
- Review of existing evidence on DNA methylation and carcinogenicity.
- Analysis of the link between epigenetic alterations and aberrant gene expression.
Main Results:
- Evidence suggests DNA-damaging agents can induce heritable changes in DNA methylation.
- Inhibition of DNA methylation has been linked to carcinogenicity.
- Tumor cells exhibit altered DNA methylation patterns.
Conclusions:
- Altered DNA methylation is a plausible mechanism by which carcinogens induce cancer.
- Epigenetic dysregulation by carcinogens may lead to aberrant heritable phenotypes and cancer development.