Analytical and Bioanalytical Chemistry

, Volume 390, Issue 2, pp 679–688

The structural modification of DNA nucleosides by nonenzymatic glycation: an in vitro study based on the reactions of glyoxal and methylglyoxal with 2′-deoxyguanosine

Authors

  • Yuyuan Li
    • Department of ChemistryUniversity of Rhode Island
  • Menashi A. Cohenford
    • Department of ChemistryUniversity of Rhode Island
    • Department of Integrated Science and TechnologyMarshall University
  • Udayan Dutta
    • Department of Cancer BiologyUniversity of Massachusetts Medical School
    • Department of ChemistryUniversity of Rhode Island
Original Paper

DOI: 10.1007/s00216-007-1682-4

Cite this article as:
Li, Y., Cohenford, M.A., Dutta, U. et al. Anal Bioanal Chem (2008) 390: 679. doi:10.1007/s00216-007-1682-4

Abstract

Methylglyoxal and glyoxal are generated from the oxidation of carbohydrates and lipids, and like d-glucose have been shown to nonenzymatically react with proteins to form advanced glycation end products (AGEs). AGEs can occur both in vitro and in vivo, and these compounds have been shown to exacerbate many of the long-term complications of diabetes. Earlier studies in our laboratory reported d-glucose, d-galactose, and d/l-glyceraldehyde formed AGEs with nucleosides. The objective of this study was to focus on purines and pyrimidines and to analyze these DNA nucleoside derived AGE adducts with glyoxal or methylglyoxal using a combination of analytical techniques. Studies using UV and fluorescence spectroscopy along with mass spectrometry provided for a thorough analysis of the nucleoside AGEs and demonstrated that methylglyoxal and glyoxal reacted with 2′-deoxyguanosine via the classic Amadori pathway, and did not react appreciably with 2′-deoxyadenosine, 2′-deoxythymidine, and 2′-deoxycytidine. Additional findings revealed that methylglyoxal was more reactive than glyoxal.

Keywords

Advanced glycation end productsMaillard reaction productsGlyoxalMethylglyoxal2′-Deoxyguanosine

Supplementary material

216_2007_1682_MOESM1_ESM.pdf (271 kb)
ESM Figures(PDF 271 kb)

Copyright information

© Springer-Verlag 2007