AP-1 as a regulator of cell life and death

Nat Cell Biol. 2002 May;4(5):E131-6. doi: 10.1038/ncb0502-e131.


The transcription factor AP-1 (activator protein-1) is involved in cellular proliferation, transformation and death. Using mice and cells lacking AP-1 components, the target-genes and molecular mechanisms mediating these processes were recently identified. Interestingly, the growth-promoting activity of c-Jun is mediated by repression of tumour suppressors, as well as upregulation of positive cell cycle regulators. Mostly, c-Jun is a positive regulator of cell proliferation, whereas JunB has the converse effect. The intricate relationships between the different Jun proteins, their activities and the mechanisms that mediate them will be discussed.

Publication types

  • Review

MeSH terms

  • Animals
  • Apoptosis / physiology*
  • Cell Division / physiology*
  • Cell Survival / physiology
  • Cell Transformation, Neoplastic*
  • Gene Expression Regulation
  • MAP Kinase Signaling System
  • Mitogen-Activated Protein Kinases / metabolism
  • Transcription Factor AP-1 / genetics
  • Transcription Factor AP-1 / metabolism*


  • Transcription Factor AP-1
  • Mitogen-Activated Protein Kinases