Abstract
3-Deoxyglucosone (3DG), a reactive dicarbonyl, is an important intermediate in the formation of advanced glycation end products (AGEs). The AGEs are particularly important in diabetes since they have been correlated with the development of diabetic complications. Consequently, measurements of 3DG are likely to provide valuable insights into the role of this metabolite in the etiology of diabetic complications. While several methods of 3DG quantitation in human plasma have been previously published, a significant discrepancy (over 30-fold) exists in the reported values. Knecht et al. (Arch. Biochem. Biophys. 294, 130-137, 1992) have reported the levels of plasma 3DG in normoglycemics to be 61 nM, using a GC/MS procedure. In contrast to this, Niwa et al. (Biochem. Biophys. Res. Commun. 196, 837-843, 1993) reported 3DG levels to be 1800 nM in normoglycemics, using a totally independent GC/MS method. To resolve this disagreement and fill the need for a robust assay for this dicarbonyl, suitable for absolute quantitation, a GC/MS procedure was devised for its measurement. Plasma samples were deproteinized either by ultrafiltration or by addition of ethanol as described by Niwa et al. (Biochem. Biophys. Res. Commun. 196, 837-843, 199...Continue Reading
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