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Updated: Nov 15, 2025

Quantifying Replication Stress in Ovarian Cancer Cells Using Single-Stranded DNA Immunofluorescence
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E2F1: Cause and Consequence of DNA Replication Stress.

Shahd Fouad1, David Hauton1, Vincenzo D'Angiolella1

  • 1Department of Oncology, Medical Research Council Oxford Institute for Radiation Oncology, University of Oxford, Oxford, United Kingdom.

Frontiers in Molecular Biosciences
|March 5, 2021
PubMed
Summary
This summary is machine-generated.

Dysregulated E2F1 activity, driven by faulty cancer pathways, promotes DNA replication stress. This review explores E2F1

Keywords:
DNA replication stressE2F1cyclin Ecyclin Fretinoblastomaribonucleotide reductaseubiquitin proteasome system

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Cancer Research

Background:

  • E2F family proteins control cell cycle entry and regulate genes for DNA replication, repair, and apoptosis.
  • E2F1 activity is crucial for cell cycle progression and programmed cell death, tightly regulated by DNA damage checkpoints.
  • Dysfunctional tumor suppressor and oncogenic pathways disrupt E2F1 regulation, leading to uncontrolled proliferation.

Purpose of the Study:

  • To review the link between disrupted E2F1 regulation and DNA replication stress phenotypes in cancer.
  • To discuss E2F1's role both upstream and downstream of DNA replication stress.
  • To explore E2F1 integration with checkpoint control and propose a therapeutic vulnerability.

Main Methods:

  • Literature review synthesizing current research on E2F1, DNA replication stress, and cancer signaling pathways.
  • Analysis of how altered signaling pathways impact E2F1 transcription and its targets.
  • Examination of E2F1's role in cellular responses to DNA replication stress.

Main Results:

  • Dysfunctional cancer signaling pathways disrupt E2F1 transcription, driving DNA replication stress.
  • E2F1 acts as both a cause and a consequence of DNA replication stress.
  • Post-translational regulation integrates E2F1 activity with checkpoint control.

Conclusions:

  • Disrupted E2F1 regulation is a significant contributor to DNA replication stress and cancer progression.
  • E2F1's multifaceted role in DNA replication stress response presents therapeutic opportunities.
  • Targeting the E2F1-checkpoint axis may offer a novel strategy against cancer.