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Quantification of three DNA Lesions by Mass Spectrometry and Assessment of Their Levels in Tissues of Mice Exposed to Ambient Fine Particulate Matter
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Quantification of three DNA Lesions by Mass Spectrometry and Assessment of Their Levels in Tissues of Mice Exposed to Ambient Fine Particulate Matter

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Oxidatively generated DNA lesions as potential biomarkers of in vivo oxidative stress

J-L Ravanat1, J Cadet, T Douki

  • 1Laboratoire Lésions des Acides Nucléiques, SCIB-UMR-E 3 (CEA-UJF), Institut Nanosciences et Cryogénie, CEA Grenoble, 17 rue des Martyrs, F38054 Grenoble Cedex 9, France. jravanat@cea.fr

Current Molecular Medicine
|February 2, 2012
PubMed

Insights

Oxidative stress biomarkers are crucial. New methods can now measure multiple DNA lesions, not just 8-oxo-7,8-dihydro-2'-deoxyguanosine, offering better insights into cellular damage.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Toxicology

Background:

  • Growing interest in oxidative stress biomarkers over three decades.
  • Focus on 8-oxo-7,8-dihydro-2 -deoxyguanosine (8-oxodGuo) due to available analytical methods.
  • Need for methods measuring multiple DNA lesions simultaneously.

Purpose of the Study:

  • Review oxidative DNA degradation products and their formation mechanisms.
  • Critically evaluate methods for measuring cellular DNA lesions (specificity, versatility, sensitivity).
  • Discuss potential of complex DNA lesions as biomarkers.

Main Methods:

  • High-performance liquid chromatography (HPLC) with electrochemical detection.
  • Mass spectrometry-based analytical assays.
  • Comet assay and other biochemical assays.

Main Results:

  • Detailed study of DNA base degradation pathways by hydroxyl radical, one-electron oxidants, and singlet oxygen.
  • Identification of potential biomarkers beyond 8-oxodGuo.
  • Demonstration of methods using ionizing radiation exposure models.

Conclusions:

  • Multiple DNA lesions, including complex ones, can serve as effective oxidative stress biomarkers.
  • Advanced analytical and biochemical assays enhance sensitivity and versatility in lesion detection.
  • Future research should focus on validating novel biomarkers and understanding complex DNA damage.

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