Back to Search
Start Over
Reaction of Glyoxal with 2-Deoxyguanosine, 2-Deoxyadenosine, 2-Deoxycytidine, Cytidine, Thymidine, and Calf Thymus DNA: Identification of DNA Adducts
- Source :
- Chemical Research in Toxicology; April 2005, Vol. 18 Issue: 4 p730-739, 10p
- Publication Year :
- 2005
-
Abstract
- Glyoxal (ethanedial) is an increasingly used industrial chemical that has been found to be mutagenic in bacteria and mammalian cells. In this study, the reactions of glyoxal with 2-deoxyguanosine, 2-deoxyadenosine, 2-deoxycytidine, cytidine, thymidine, and calf thymus DNA have been studied in aqueous buffered solutions. The nucleoside adducts were isolated by reversed-phase liquid chromatography and characterized by their UV absorbance and <SUP>1</SUP>H and <SUP>13</SUP>C NMR spectroscopic and mass spectrometric features. The reaction with 2-deoxyguanosine gave one adduct, the previously known 3-(2-deoxy-β-<SCP>d</SCP>-erythro-pentofuranosyl)-5,6,7-trihydro-6,7-dihydroxyimidazo[1,2-a]purine-9-one adduct. The reaction of 2-deoxyadenosine with glyoxal resulted in the formation of a previously not reported N<SUP>6</SUP>-(hydroxyacetyl)-2-deoxyadenosine adduct. In the reaction of glyoxal with 2-deoxycytidine and cytidine at neutral conditions and 37 °C, 5-hydroxyacetyl pyrimidine derivatives were obtained. When the cytidine reaction was performed at pH 4.5 and 50 °C, the 5-hydroxyacetyl derivative of uridine was formed through deamination of cytidine−glyoxal. Adducts in the thymidine reaction could not be detected. In the reaction of glyoxal with calf thymus DNA, the 2-deoxyguanosine−glyoxal and 2-deoxyadenosine−glyoxal adducts were obtained, the former being the major adduct.
Details
- Language :
- English
- ISSN :
- 0893228X and 15205010
- Volume :
- 18
- Issue :
- 4
- Database :
- Supplemental Index
- Journal :
- Chemical Research in Toxicology
- Publication Type :
- Periodical
- Accession number :
- ejs7310201