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Published on: March 30, 2019

The E2F1-miRNA cancer progression network

Susanne Knoll1, Stephan Emmrich, Brigitte M Pützer

  • 1Department of Vectorology and Experimental Gene Therapy, Rostock University Medical Center, Rostock, Germany.

Advances in Experimental Medicine and Biology
|February 5, 2013
PubMed

Insights

The transcription factor E2F1 has dual roles in cancer, suppressing tumors or promoting progression. Its interaction with microRNAs (miRNAs) influences E2F1

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Epigenetics

Background:

  • The transcription factor E2F1 functions as both a tumor suppressor and an oncogene.
  • E2F1 activation mediates apoptosis under cellular stress as an anti-tumorigenic mechanism.
  • In aggressive, chemoresistant cancers (melanoma, prostate, bladder), E2F1 promotes cancer progression.

Purpose of the Study:

  • To investigate the mechanisms underlying E2F1's role in cancer invasiveness and metastasis.
  • To explore the feedback loops and regulatory network between E2F1 and microRNAs (miRNAs).

Main Methods:

  • Review and summarization of existing research on E2F1 and miRNA interactions.
  • Analysis of regulatory feedback loops influencing E2F1's proapoptotic versus prosurvival functions.

Main Results:

  • E2F1's role shifts from tumor suppression to oncogenesis in advanced, chemoresistant cancers.
  • Epigenetic inactivation of tumor suppressor genes contributes to E2F1-mediated aggressiveness.
  • Feedback loops exist where E2F1 activates miRNAs, which in turn regulate E2F1 or its target genes.

Conclusions:

  • The complex interplay between E2F1 and miRNAs significantly impacts the balance of its functions.
  • Understanding these miRNA-E2F1 interactions is crucial for deciphering E2F1's role in cancer progression and chemoresistance.

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