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Related Experiment Videos

Gene amplification in cancer.

Donna G Albertson1

  • 1Cancer Research Institute and Comprehensive Cancer Center, University of California-San Francisco, San Francisco, CA 94143, USA. albertson@cc.ucsf.edu

Trends in Genetics : TIG
|June 22, 2006
PubMed
Summary
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Gene amplification, an increase in chromosome copy number, is common in tumors and drives gene overexpression. This genetic alteration has diagnostic, prognostic, and drug resistance implications in cancer.

Area of Science:

  • Genetics
  • Cancer Biology
  • Molecular Oncology

Background:

  • Gene amplification involves an increase in the copy number of a specific chromosomal region.
  • This phenomenon is frequently observed in various tumor types, correlating with elevated gene expression.
  • Amplified DNA can manifest as extrachromosomal elements, tandem repeats, or dispersed genomic copies.

Purpose of the Study:

  • To review the mechanisms and implications of gene amplification in cancer.
  • To highlight the clinical relevance of gene amplification in tumor diagnosis and prognosis.
  • To discuss gene amplification as a factor in acquired drug resistance.

Main Methods:

  • Literature review of gene amplification mechanisms.
  • Analysis of genomic organization of amplified DNA.

Related Experiment Videos

  • Examination of clinical data linking amplification to tumor subtypes and drug resistance.

    • Main Results:

    • Gene amplification can occur through various mechanisms, including common fragile sites, DNA replication defects, and telomere dysfunction.
    • Despite complexity, amplification patterns show consistency across different tumor types.
    • Amplification is observed in early preneoplastic lesions, suggesting a fundamental role in tumorigenesis.

    Conclusions:

    • Gene amplification is a significant genetic event in cancer with clear diagnostic and prognostic value.
    • Understanding amplification mechanisms is crucial for developing targeted therapies.
    • Gene amplification plays a critical role in the development of acquired resistance to cancer drugs.