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Related Experiment Videos

FOXO transcription factors at the interface between longevity and tumor suppression.

Eric L Greer1, Anne Brunet

  • 1Department of Genetics, Stanford University, CA 94305, USA.

Oncogene
|November 17, 2005
PubMed
Summary

FOXO transcription factors link aging and cancer by regulating genes involved in cell cycle arrest and apoptosis. Activating FOXO proteins promotes longevity and suppresses tumors, offering insights into age-related diseases.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Aging Research

Background:

  • Human diseases, including cancer, exhibit age-dependent onset.
  • Molecular links between aging and cancer are under investigation.
  • FOXO (Forkhead box O) transcription factors are implicated in longevity and tumor suppression.

Purpose of the Study:

  • To explore the role of FOXO transcription factors as molecular links between aging and cancer.
  • To understand how FOXO proteins integrate environmental signals to regulate gene expression.
  • To investigate the connection between stress resistance, longevity, and tumor suppression mediated by FOXO factors.

Main Methods:

  • Analysis of FOXO protein localization and degradation pathways.
  • Investigating FOXO target gene regulation in response to growth factors and stress.

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  • Examining the impact of FOXO activation on lifespan in model organisms (worms and flies).

    • Main Results:

    • FOXO proteins are regulated by the Akt kinase pathway, translocating to the nucleus in the absence of growth factors.
    • Nuclear FOXO proteins upregulate genes promoting cell cycle arrest, stress resistance, and apoptosis.
    • Activation of FOXO transcription factors in model organisms extends lifespan.
    • Evidence suggests FOXO factors possess tumor suppressor functions in various cancers.

    Conclusions:

    • FOXO transcription factors act as crucial mediators between environmental stimuli and gene expression programs.
    • These factors coordinate organismal longevity and tumor suppression, highlighting their significance in age-related diseases.
    • FOXO proteins represent a key molecular link connecting the aging process with cancer development.