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Enhanced Reduced Representation Bisulfite Sequencing for Assessment of DNA Methylation at Base Pair Resolution
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Enhanced Reduced Representation Bisulfite Sequencing for Assessment of DNA Methylation at Base Pair Resolution

Published on: February 24, 2015

DNA methylation and cancer

Partha M Das1, Rakesh Singal

  • 1Department of Medicine, Miami VA Medical Center, Miami, FL, USA.

Journal of Clinical Oncology : Official Journal of the American Society of Clinical Oncology
|November 16, 2004
PubMed

Insights

DNA methylation, an epigenetic process, significantly impacts gene transcription and cancer development. Aberrant DNA methylation patterns, including hypermethylation and hypomethylation, are crucial in oncogenesis and offer potential for early tumor detection and therapeutic strategies.

Area of Science:

  • Epigenetics
  • Molecular Biology
  • Oncology

Background:

  • DNA methylation is a key epigenetic mechanism regulating gene transcription.
  • Alterations in DNA methylation are frequently observed in various cancers and during development.
  • Both promoter hypermethylation (silencing tumor suppressor genes) and global hypomethylation contribute to oncogenesis.

Purpose of the Study:

  • To review the role of DNA methylation in carcinogenesis.
  • To discuss the mechanisms and regulatory proteins involved in DNA methylation.
  • To explore the potential of DNA methylation in cancer detection, prognosis, and therapy.

Main Methods:

  • Literature review focusing on DNA methylation in cancer.
  • Analysis of epigenetic modifications, including hypermethylation and hypomethylation.
  • Investigation of regulatory proteins, enzymes, and dietary factors (e.g., folate) influencing methylation.

Main Results:

  • DNA methylation alterations are common in tumors.
  • Hypermethylation of tumor suppressor genes leads to silencing.
  • Global hypomethylation can also drive oncogenesis.
  • Dietary factors and genetic polymorphisms (e.g., MTHFR) impact methylation patterns.

Conclusions:

  • DNA methylation is a critical factor in cancer development.
  • Early detection and prognosis may be improved by analyzing methylation patterns in body fluids.
  • Reversible nature of DNA methylation allows for therapeutic interventions using demethylating agents.

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