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[Epigenetics and cancer].

Sophie Deltour1, Valérie Chopin, Dominique Leprince

  • 1Welcome Trust-Cancer Research UK, Gurdon Institute of cancer and developmental biology, University of Cambridge, Royaume-Uni.

Medecine Sciences : M/S
|April 7, 2005
PubMed
Summary

Epigenetics, heritable gene expression changes without DNA alteration, is vital for development and tissue function. Aberrant epigenetic modifications are key drivers in cancer, offering new therapeutic targets.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Epigenetics

Context:

  • Epigenetic modifications regulate gene expression by altering chromatin structure.
  • These modifications are crucial for normal development and cellular function.
  • Historically, genetic causes of cancer overshadowed epigenetic roles.

Purpose:

  • To highlight the predominant role of epigenetic modifications in pathologies, particularly cancer.
  • To explain the mechanisms of epigenetic regulation at the nucleosome level.
  • To introduce epigenetic therapy as a promising treatment strategy.

Summary:

  • Epigenetics involves heritable gene expression changes independent of DNA sequence.
  • Key epigenetic alterations in tumorigenesis include aberrant DNA methylation and histone modifications.
  • Unlike genetic changes, epigenetic modifications are dynamic and reversible.

Impact:

  • Epigenetic alterations are increasingly recognized as critical in cancer initiation and progression.
  • Targeting epigenetic mechanisms offers a novel therapeutic approach (epigenetic therapy).
  • Development of specific inhibitors has led to ongoing clinical trials for epigenetic therapies.

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