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Hypomethylation of repeated DNA sequences in cancer

Jason P Ross1, Keith N Rand, Peter L Molloy

  • 1Commonwealth Scientific & Industrial Research Organisation, Food & Nutritional Science, Preventative Health National Research Flagship, North Ryde, NSW 1670, Australia.

Epigenomics
|November 30, 2011
PubMed

Insights

Cancer DNA methylation changes, including genome hypomethylation, impact gene expression and chromosome stability. Understanding these patterns may aid in tumor diagnosis and prognosis.

Area of Science:

  • Epigenetics and Genomics
  • Cancer Biology

Background:

  • Cancer development involves altered DNA methylation, with gene hypermethylation and global 5-methylcytosine decrease.
  • Genome hypomethylation in cancer affects single-copy genes, repeats, and transposable elements, showing significant variability.

Purpose of the Study:

  • To review current knowledge on genome hypomethylation in cancer.
  • To focus on the hypomethylation of various repeat sequence classes and families.
  • To explore the clinical potential of DNA methylation changes in cancer.

Main Methods:

  • Literature review of studies on genome hypomethylation in cancer.
  • Analysis of data concerning repeat sequence methylation and its functional implications.
  • Discussion of underlying mechanisms and clinical applications of DNA methylation alterations.

Main Results:

  • Hypomethylation of repeat sequences is crucial for maintaining chromosome structure and transcriptional regulation.
  • Emerging data highlight the significance of repeat family methylation in cancer.

Conclusions:

  • Genome hypomethylation, particularly of repeat sequences, plays a critical role in cancer progression.
  • Understanding these epigenetic changes offers potential for novel diagnostic, prognostic, and classification tools in oncology.

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