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Updated: Jan 20, 2026

Evaluation of Cancer Stem Cell Migration Using Compartmentalizing Microfluidic Devices and Live Cell Imaging
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The Multifaceted p21 (Cip1/Waf1/CDKN1A) in Cell Differentiation, Migration and Cancer Therapy

Nina-Naomi Kreis1, Frank Louwen2, Juping Yuan2

  • 1Department of Gynecology and Obstetrics, University Hospital, J. W. Goethe-University, Theodor-Stern-Kai 7, D-60590 Frankfurt, Germany. Nina-Naomi.Kreis@kgu.de.

Cancers
|August 24, 2019
PubMed

Insights

The cell cycle protein p21, a cyclin-dependent kinase inhibitor, plays a dual role in cancer, acting as both a tumor suppressor and oncogene. Its functions in cell cycle control, differentiation, and migration are context-dependent, impacting its therapeutic potential.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Cancer Research

Background:

  • Loss of cell cycle control is a hallmark of cancer.
  • p21 is a key cell cycle regulator, acting as a cyclin-dependent kinase inhibitor.
  • p21 expression is controlled by p53-dependent and independent pathways.

Purpose of the Study:

  • To review the general functions of p21.
  • To summarize the roles of p21 in differentiation, migration, and invasion.
  • To discuss the potential and challenges of targeting p21 in cancer therapy.

Main Methods:

  • Literature review of p21 functions.
  • Analysis of p21's roles in cellular processes.
  • Discussion of p21's dual role in tumorigenesis.

Main Results:

  • p21 regulates cell cycle, differentiation, migration, apoptosis, DNA repair, and senescence.
  • p21's function as a tumor suppressor or oncogene depends on cellular context, localization, and modifications.
  • p21's involvement in differentiation, migration, and invasion is highlighted.

Conclusions:

  • p21 has diverse roles beyond cell cycle arrest, including in differentiation and migration.
  • The dual role of p21 necessitates careful consideration for its use as a biomarker or therapeutic target.
  • Understanding p21's context-dependent functions is crucial for cancer treatment strategies.
Keywords:
CDKN1Aanti-cancer therapydifferentiationmetastasismigrationp21

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