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Visualizing and Quantifying Endonuclease-Based Site-Specific DNA Damage
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Cellular responses to DNA damage: one signal, multiple choices

Tin Tin Su1

  • 1Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, Colorado 80309-0347, USA. Tin.su@colorado.edu

Annual Review of Genetics
|June 30, 2006
PubMed

Insights

Cellular responses to DNA double-strand breaks (DSBs) vary, leading to repair, telomere preservation, or apoptosis. This review explores factors determining these outcomes for DNA repair.

Area of Science:

  • Molecular Biology
  • Cellular Biology
  • Genetics

Background:

  • DNA double-strand breaks (DSBs) are critical DNA lesions.
  • Cellular responses to DSBs can be mutually exclusive.
  • Outcomes include repair, telomere preservation, or apoptosis.

Purpose of the Study:

  • To review recent data on cellular responses to DSBs.
  • To understand the factors determining DSB fate.
  • To explore mechanisms of DNA repair, telomere maintenance, and apoptosis.

Main Methods:

  • Literature review of recent data on DSB cellular responses.
  • Analysis of factors influencing DSB outcomes.
  • Synthesis of information on cell cycle arrest, DNA repair pathways, and programmed cell death.

Main Results:

  • DSB location influences whether it is repaired or preserved in telomeres.
  • Checkpoint activation leads to cell division arrest for DSB repair.
  • Alternatively, cells may undergo apoptosis in response to DSBs.

Conclusions:

  • The cell's decision to repair, preserve, or undergo apoptosis depends on DSB characteristics and cellular context.
  • Understanding these outcomes is crucial for comprehending genome stability.
  • Further research is needed to fully elucidate the regulatory mechanisms governing DSB fate.

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