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Forkhead transcription factors: new insights into protein kinase B (c-akt) signaling

G J Kops1, B M Burgering

  • 1Center for Biomedical Genetics, University of Utrecht, The Netherlands.

Journal of Molecular Medicine (Berlin, Germany)
|November 24, 1999
PubMed

Insights

Protein kinase B (PKB), or c-Akt, and its pathway are implicated in cancer. New research shows Forkhead transcription factors are PKB targets, offering insights into oncogenesis mechanisms.

Area of Science:

  • Molecular Biology
  • Oncology
  • Cell Signaling

Background:

  • The protein kinase B (PKB) signaling pathway, including its activator phosphatidylinositol 3-kinase (PI3K) and negative regulator PTEN, is frequently altered in cancer.
  • Active PKB and PI3K contribute to the transforming activities of oncogenic viruses.
  • PTEN, a tumor suppressor, negatively regulates the PI3K/PKB pathway.

Purpose of the Study:

  • To review studies identifying downstream targets of PKB.
  • To explore the role of Forkhead transcription factors as novel PKB targets.
  • To discuss the implications of these findings for understanding PI3K/PKB-mediated oncogenesis.

Main Methods:

  • Literature review of studies on PI3K/PKB signaling.
  • Analysis of research identifying PKB downstream targets.
  • Examination of studies on Forkhead transcription factors in relation to PI3K/PKB signaling.

Main Results:

  • PKB directly phosphorylates a subfamily of Forkhead transcription factors.
  • This phosphorylation event alters the activity or localization of these transcription factors.
  • The PI3K/PKB pathway's influence on tumorigenesis is partly mediated through these Forkhead targets.

Conclusions:

  • Forkhead transcription factors are key downstream targets of the PI3K/PKB pathway.
  • Understanding this interaction provides new insights into cancer development.
  • Targeting the PI3K/PKB-Forkhead axis may offer therapeutic strategies for cancer.

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