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Inactivation of hCDC4 can cause chromosomal instability

Author

Listed:
  • Harith Rajagopalan

    (Johns Hopkins University School of Medicine)

  • Prasad V. Jallepalli

    (Johns Hopkins University School of Medicine
    Memorial Sloan-Kettering Cancer Center)

  • Carlo Rago

    (Johns Hopkins University School of Medicine)

  • Victor E. Velculescu

    (Johns Hopkins University School of Medicine)

  • Kenneth W. Kinzler

    (Johns Hopkins University School of Medicine)

  • Bert Vogelstein

    (Johns Hopkins University School of Medicine
    The Johns Hopkins University Medical Institutions)

  • Christoph Lengauer

    (Johns Hopkins University School of Medicine)

Abstract

Aneuploidy, an abnormal chromosome number, has been recognized as a hallmark of human cancer for nearly a century1; however, the mechanisms responsible for this abnormality have remained elusive. Here we report the identification of mutations in hCDC4 (also known as Fbw7 or Archipelago) in both human colorectal cancers and their precursor lesions. We show that genetic inactivation of hCDC4, by means of targeted disruption of the gene in karyotypically stable colorectal cancer cells, results in a striking phenotype associated with micronuclei and chromosomal instability. This phenotype can be traced to a defect in the execution of metaphase and subsequent transmission of chromosomes, and is dependent on cyclin E—a protein that is regulated by hCDC4 (refs 2–4). Our data suggest that chromosomal instability is caused by specific genetic alterations in a large fraction of human cancers and can occur before malignant conversion.

Suggested Citation

  • Harith Rajagopalan & Prasad V. Jallepalli & Carlo Rago & Victor E. Velculescu & Kenneth W. Kinzler & Bert Vogelstein & Christoph Lengauer, 2004. "Inactivation of hCDC4 can cause chromosomal instability," Nature, Nature, vol. 428(6978), pages 77-81, March.
    • Handle: RePEc:nat:nature:v:428:y:2004:i:6978:d:10.1038_nature02313
    DOI: 10.1038/nature02313
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