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p21 in cancer: intricate networks and multiple activities

Tarek Abbas1, Anindya Dutta

  • 1Department of Biochemistry and Molecular Genetics, University of Virginia, School of Medicine, 1340 Jefferson Park Avenue, Charlottesville, VA 22908, USA. tabbas@virginia.edu

Nature Reviews. Cancer
|May 15, 2009
PubMed

Insights

The cell cycle regulator p21 (p21WAF1/Cip1) is crucial in cancer development. This review explores its dual role in suppressing tumors and paradoxically promoting them, impacting cancer progression.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Cancer Research

Background:

  • Cell cycle dysregulation is a key driver of cancer.
  • The cyclin-dependent kinase inhibitor p21 (p21WAF1/Cip1) is a critical regulator of the cell cycle.
  • p21 acts as a sensor and effector for anti-proliferative signals.

Purpose of the Study:

  • To review recent advances in understanding p21 regulation and function.
  • To emphasize p21's p53-independent tumor suppressor activities.
  • To explore p21's paradoxical tumor-promoting activities and their cancer implications.

Main Methods:

  • Literature review of recent research on p21.
  • Analysis of p21's regulatory mechanisms.
  • Examination of p21's diverse biological functions in cancer.

Main Results:

  • p21 exhibits complex roles, acting as both a tumor suppressor and promoter.
  • p53-independent functions of p21 significantly influence cancer development.
  • Understanding p21's dual activities is vital for cancer therapy.

Conclusions:

  • p21's multifaceted roles necessitate careful consideration in cancer treatment strategies.
  • Further research into p21 regulation and function can reveal new therapeutic targets.
  • Targeting p21 may offer novel approaches to combatting cancer.

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