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p14ARF links the tumour suppressors RB and p53

Author

Listed:
  • Stewart Bates

    (ABL Basic research Program)

  • Andrew C. Phillips

    (ABL Basic research Program)

  • Paula A. Clark

    (Imperial Cancer Research Fund Laboratories)

  • Francesca Stott

    (Imperial Cancer Research Fund Laboratories)

  • Gordon Peters

    (Imperial Cancer Research Fund Laboratories)

  • Robert L. Ludwig

    (National Cancer Institute, Frederick Cancer Research and Development Center)

  • Karen H. Vousden

    (National Cancer Institute, Frederick Cancer Research and Development Center)

Abstract

Most human cancers show perturbation of growth regulation mediated by the tumour-suppressor proteins retinoblastoma (RB) and p53 (ref. 1), indicating that loss of both pathways is necessary for tumour development. Loss of RB function leads to abnormal proliferation related to the deregulation of the E2F transcription factors, but also results in the activation of p53, which suppresses cell growth. Here we show that E2F-1 directly activates expression of the human tumour-suppressor protein p14ARF (the mouse homologue is called p19ARF), which binds to the MDM2-p53 complex and prevents p53 degradation2,5. These results complete a pathway linking abnormal proliferative signals, such as loss of RB, with the activation of a p53 response, through E2F-1 and p14ARF. They suggest that E2F-1, a protein inherently activated by cell-cycle progression, is part of a fail-safe mechanism to protect against aberrant cell growth.

Suggested Citation

  • Stewart Bates & Andrew C. Phillips & Paula A. Clark & Francesca Stott & Gordon Peters & Robert L. Ludwig & Karen H. Vousden, 1998. "p14ARF links the tumour suppressors RB and p53," Nature, Nature, vol. 395(6698), pages 124-125, September.
    • Handle: RePEc:nat:nature:v:395:y:1998:i:6698:d:10.1038_25867
    DOI: 10.1038/25867
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