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Updated: Aug 17, 2026

Quantification of three DNA Lesions by Mass Spectrometry and Assessment of Their Levels in Tissues of Mice Exposed to Ambient Fine Particulate Matter
12:15

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

Published on: May 29, 2019

DNA adducts: mass spectrometry methods and future prospects

P B Farmer1, K Brown, E Tompkins

  • 1Cancer Biomarkers and Prevention Group, Biocentre, University of Leicester, Leicester, LE1 7RH, UK. pbf1@le.ac.uk

Toxicology and Applied Pharmacology
|July 2, 2005
PubMed

Insights

Detecting DNA adducts monitors exposure to genotoxic carcinogens. Advanced mass spectrometry (MS) techniques offer sensitive analysis of these adducts, aiding in understanding human exposure to environmental carcinogens.

Area of Science:

  • Environmental Health Sciences
  • Analytical Chemistry
  • Molecular Biology

Background:

  • DNA adduct detection is crucial for monitoring exposure to genotoxic carcinogens and understanding their mutagenic effects.
  • Mass spectrometry (MS) has advanced significantly for qualitative and quantitative analysis of human DNA adducts.
  • LC-MS/MS is a favored technique for adduct detection on nucleic acid bases, deoxynucleosides, or deoxynucleotides.

Purpose of the Study:

  • To highlight the advancements in mass spectrometry (MS) for detecting and quantifying DNA adducts.
  • To showcase applications of MS in identifying specific DNA adducts related to environmental exposures and oxidative damage.
  • To discuss the development of new techniques for enhanced sensitivity in DNA adduct analysis.

Main Methods:

  • Liquid chromatography-tandem mass spectrometry (LC-MS/MS) for analyzing DNA adducts.
  • Accelerator mass spectrometry (AMS) for higher sensitivity detection (1-10 adducts/10^12 nucleotides) using isotopes like carbon-14.
  • Development of new postlabelling techniques incorporating carbon-14 for broader applicability.

Main Results:

  • Successful determination of N7-(2-carbamoyl-2-hydroxyethyl)-guanine as a urinary DNA repair product after acrylamide exposure.
  • Identification of 8-oxo-7,8-dihydro-2'-deoxyguanosine and 8-oxo-7,8-dihydro-2'-deoxyadenosine as markers of oxidative damage in human lymphocyte DNA.
  • Demonstration of enhanced sensitivity with AMS and ongoing development of new labelling techniques.

Conclusions:

  • Advanced MS techniques, including LC-MS/MS and AMS, are powerful tools for analyzing DNA adducts.
  • These methods provide critical insights into human exposure to environmental carcinogens and oxidative stress.
  • Combining advanced MS with existing techniques like 32P-postlabelling and immunochemistry will significantly advance the understanding of human exposure burdens.

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