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Updated: Jun 13, 2026
Methylated DNA Immunoprecipitation
Published on: January 2, 2009
Epigenetic inactivation of tumour suppressor coding and non-coding genes in human cancer: an update
Pere Llinàs-Arias1, Manel Esteller2,3,4
1Cancer Epigenetics Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Catalonia, Spain.
Abstract:
Cancer cells undergo many different alterations during their transformation, including genetic and epigenetic events. The controlled division of healthy cells can be impaired through the downregulation of tumour suppressor genes. Here, we provide an update of the mechanisms in which epigenetically altered coding and non-coding tumour suppressor genes are implicated. We will highlight the importance of epigenetics in the different molecular pathways that lead to enhanced and unlimited capacity of division, genomic instability, metabolic shift, acquisition of mesenchymal features that lead to metastasis, and tumour plasticity. We will briefly describe these pathways, focusing especially on genes whose epigenetic inactivation through DNA methylation has been recently described, as well as on those that are well established as being epigenetically silenced in cancer. A brief perspective of current clinical therapeutic approaches that can revert epigenetic inactivation of non-coding tumour suppressor genes will also be given.
Insights
Epigenetic alterations silence tumour suppressor genes, driving cancer progression. Understanding these mechanisms, including DNA methylation, is crucial for developing new therapies targeting cancer cell division and metastasis.
Area of Science:
- Oncology
- Epigenetics
- Molecular Biology
Background:
- Cancer development involves genetic and epigenetic alterations.
- Downregulation of tumour suppressor genes impairs normal cell division.
- Epigenetic modifications play a critical role in cancer transformation.
Purpose of the Study:
- To update knowledge on mechanisms of epigenetically altered tumour suppressor genes in cancer.
- To highlight epigenetics' role in key cancer pathways like uncontrolled division, genomic instability, metabolic shifts, metastasis, and tumour plasticity.
- To discuss recently identified and established epigenetically silenced genes, and potential therapeutic strategies.
Main Methods:
- Review and synthesis of current research on epigenetic regulation of tumour suppressor genes.
- Focus on DNA methylation as a key epigenetic mechanism.
- Analysis of molecular pathways involved in cancer progression influenced by epigenetic silencing.
Main Results:
- Epigenetic inactivation of both coding and non-coding tumour suppressor genes contributes to cancer hallmarks.
- Specific pathways affected include unlimited cell division, genomic instability, metabolic reprogramming, epithelial-mesenchymal transition (EMT) driving metastasis, and tumour plasticity.
- Both newly identified and well-established epigenetically silenced genes are implicated.
Conclusions:
- Epigenetic silencing of tumour suppressor genes is a fundamental mechanism in cancer.
- Targeting epigenetic modifications offers promising therapeutic avenues.
- Further research into non-coding RNA epigenetic regulation and therapeutic reversal is warranted.
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