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Novel functions for the transcription factor E2F4 in development and disease

Jenny Hsu1, Julien Sage1

  • 1a Departments of Pediatrics and Genetics , Stanford University , Stanford , CA , USA.

Cell Cycle (Georgetown, Tex.)
|November 5, 2016
PubMed

Insights

E2F4, a transcription factor, traditionally represses cell proliferation. New research reveals E2F4 also activates genes, impacting stem cells, regeneration, and cancer, independent of the retinoblastoma family.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Genetics

Background:

  • The E2F family of transcription factors regulates cell proliferation.
  • E2F4, a member of this family, is known as a transcriptional repressor crucial for cell cycle arrest.
  • Recent findings suggest E2F4 has roles beyond cell cycle regulation.

Purpose of the Study:

  • To review the established functions of E2F4.
  • To discuss emerging evidence on E2F4's diverse roles.
  • To focus on E2F4's involvement in cell fate decisions during tissue homeostasis and regeneration.

Main Methods:

  • Literature review of canonical and recent studies on E2F4.
  • Analysis of E2F4's interactions with the retinoblastoma (RB) family.
  • Examination of E2F4's function in stem cells, regeneration, and cancer.

Main Results:

  • E2F4's canonical role as a repressor is critical for G0/G1 cell cycle arrest with RB family members.
  • E2F4 exhibits non-canonical functions, including direct target gene activation.
  • These novel functions are observed in stem cell biology, regeneration, and oncogenesis.

Conclusions:

  • E2F4's role extends beyond cell cycle repression.
  • E2F4 is implicated in complex cellular processes like cell fate determination.
  • Further research into E2F4's multifaceted functions is warranted for understanding tissue homeostasis and disease.
Keywords:
E2FE2F4RBcancercell cycledevelopmentdifferentiationregenerationstem cells

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