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Two- and Three-Dimensional Live Cell Imaging of DNA Damage Response Proteins
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CHK2 kinase in the DNA damage response and beyond

Laura Zannini1, Domenico Delia2, Giacomo Buscemi3

  • 1Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Amadeo 42, 20133 Milan, Italy.

Journal of Molecular Cell Biology
|November 19, 2014
PubMed

Insights

The serine/threonine kinase CHK2 is crucial for DNA damage response, regulating cell cycle and apoptosis. It also has functions independent of DNA damage, impacting cell cycle progression and potentially cancer development.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Genetics

Background:

  • The serine/threonine kinase CHK2 is a central regulator of the DNA damage response pathway in human cells.
  • CHK2 activation leads to phosphorylation of over 20 substrates, orchestrating cellular outcomes like cell cycle arrest, apoptosis, senescence, or DNA repair.
  • Emerging evidence highlights CHK2's roles in DNA structure modification and cell cycle progression, independent of DNA damage.

Purpose of the Study:

  • To review the dual functions of CHK2: its role in DNA damage response and its activities in unstressed cells.
  • To explore the implications of CHK2's functions in tumorigenesis.
  • To discuss CHK2 as a potential therapeutic target in cancer treatment.

Main Methods:

  • Literature review of CHK2's functions in DNA damage response.
  • Analysis of studies investigating CHK2's roles in unstressed cells.
  • Synthesis of information regarding CHK2's involvement in cancer and therapeutic strategies.

Main Results:

  • CHK2 activation is a critical step in the cellular response to genotoxic stress, mediating diverse outcomes.
  • CHK2 exhibits functions beyond DNA damage response, influencing normal cell cycle progression and DNA structure.
  • Dysregulation of CHK2 is implicated in tumorigenesis, suggesting its potential as a cancer therapy target.

Conclusions:

  • CHK2 is a versatile kinase with essential roles in both DNA damage response and fundamental cellular processes.
  • Understanding CHK2's multifaceted activities is crucial for comprehending its role in cancer.
  • Targeting CHK2 may offer a promising avenue for novel cancer therapies.
Keywords:
DNA damageapoptosischeckpointsgenomic stability

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