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Interplay between FOXO, TOR, and Akt

Nissim Hay1

  • 1Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago, IL 60607, USA. nhay@uic.edu

Biochimica Et Biophysica Acta
|March 29, 2011
PubMed

Insights

Forkhead box O (FOXO) transcription factors act as key regulators, coordinating the activities of Akt and targets of rapamycin complexes (TORCs). This review explores their regulatory roles and biological significance in aging and cancer.

Area of Science:

  • Molecular Biology
  • Cellular Signaling
  • Biochemistry

Background:

  • Forkhead box O (FOXO) transcription factors are crucial regulators of cellular processes.
  • Akt and targets of rapamycin complexes (TORCs) are central signaling pathways involved in cell growth, metabolism, and survival.
  • Dysregulation of these pathways is implicated in aging and cancer.

Purpose of the Study:

  • To review the regulatory circuits mediated by FOXO transcription factor activation.
  • To elucidate how FOXO activation modulates the activities of Akt and TORCs.
  • To discuss the biological significance of these FOXO-mediated regulatory circuits in the context of cancer and aging.

Main Methods:

  • Literature review of existing research on FOXO transcription factors, Akt, and TORCs.
  • Analysis of regulatory mechanisms connecting FOXO activation to Akt and TORC signaling.
  • Synthesis of information on the biological implications of these interactions.

Main Results:

  • FOXO factors act as rheostats, integrating signals to coordinate Akt and TORC activities.
  • Activation of FOXO influences downstream targets involved in stress resistance, metabolism, and apoptosis.
  • These regulatory circuits play a significant role in cellular responses to stress and in the pathogenesis of aging and cancer.

Conclusions:

  • FOXO transcription factors are critical nodes in cellular signaling networks.
  • Understanding FOXO-mediated regulation of Akt and TORCs provides insights into aging and cancer biology.
  • Targeting the P13K-AKT-FoxO axis holds potential for therapeutic interventions.

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