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c-Myc: linking transformation and genomic instability.

Edward V Prochownik1

  • 1Division of Hematology/Oncology, Children's Hospital of Pittsburgh, Pittsburgh, PA 15213, USA. procev@chp.edu

Current Molecular Medicine
|September 11, 2008
PubMed
Summary

The oncogene c-Myc drives cancer development by altering gene expression and promoting genomic instability. Overexpression of c-Myc accelerates mutation rates, leading to tumor progression and resistance.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • The oncogene c-Myc is frequently deregulated in human cancers.
  • c-Myc functions as a transcription factor, regulating hundreds of target genes involved in cell transformation.
  • Recent research elucidates c-Myc's role in promoting cancer development.

Purpose of the Study:

  • To understand the mechanisms by which c-Myc promotes cellular transformation.
  • To investigate the role of c-Myc in genomic instability and tumor progression.

Main Methods:

  • Analysis of c-Myc's function as a transcription factor.
  • Examination of c-Myc's impact on gene expression.
  • Investigation of c-Myc-induced genomic alterations in cellular transformation models.

Main Results:

  • c-Myc deregulation is sufficient for rapid in vitro transformation of certain cell lines.
  • Cooperation with other oncogenes like Ras is required for primary cell transformation.
  • c-Myc accelerates mutation rates, causing genomic instability including DNA breaks and chromosomal defects.
  • c-Myc overexpression induces a "mutator phenotype" facilitating tumor evolution.

Conclusions:

  • c-Myc plays a critical role in both acute and chronic cancer transformation.
  • c-Myc-induced genomic instability is a key driver of tumor progression, invasiveness, metastasis, and drug resistance.
  • Targeting c-Myc may offer therapeutic strategies for various cancers.