Glyoxal (GO) and methylglyoxal (MGO) are two important biomarkers in diabetes. Analytical methods for determination of GO and MGO in serum samples are either HPLC with UV-Vis (low sensitivity) or MS/MS (expensive) detection. These disadvantages have hampered the introduction of these biomarkers as a routine analyte for diabetes diagnostics into the clinical laboratory. In this study, we introduce a UHPLC method with fluorescence detection for the measurement of GO and MGO in serum samples by pre-column derivatization at neutral pH with 5, 6-diamino-2,4-dihydroxypyrimidine sulfate (DDP) to form lumazines. The method was validated as per FDA guidelines. Using this method, we have determined GO and MGO in a variety of animal serum samples, and for example, determined the GO and MGO concentration in adult bovine serum to be 852 ± 27 and 192 ± 10 nmol/L, respectively. In human serum, GO and MGO levels in non-diabetic subjects (n = 14) were determined to be 154 ± 88 and 98 ± 27 nmol/L, and in serum samples from subjects with diabetes (n = 14) 244 ± 137 and 190 ± 68 nmol/L, respectively. In addition, interference studies showed that physiological serum components did not lead to an artificial increase in the levels of GO and MGO.

Item Type:	Refereed Article
Keywords:	blood samples, fluorescence, glyoxal, methylglyoxal, UHPLC, validation
Research Division:	Biological Sciences
Research Group:	Biochemistry and cell biology
Research Field:	Analytical biochemistry
Objective Division:	Health
Objective Group:	Clinical health
Objective Field:	Clinical health not elsewhere classified
UTAS Author:	Srikanth, V (Dr Velandai Srikanth)
ID Code:	132981
Year Published:	2019
Web of Science® Times Cited:	10
Deposited By:	Menzies Institute for Medical Research
Deposited On:	2019-05-29
Last Modified:	2020-08-14
Downloads:	0