Background. Plasma and urinary levels of D-lactate have been linked to the presence of diabetes. Previously developed techniques have shown several limitations to further evaluate D-lactate as a biomarker for this condition. Methods. D- and L-lactate were quantified using ultraperformance liquid chromatography tandem mass spectrometry with labelled internal standard. Samples were derivatized with diacetyl-L-tartaric anhydride and separated on a C(18)-reversed phase column. D- and L-lactate were analysed in plasma and urine of controls, patients with inflammatory bowel disease (IBD), and patients with type 2 diabetes (T2DM). Results. Quantitative analysis of D- and L-lactate was achieved successfully. Calibration curves were linear (r(2) > 0.99) over the physiological and pathophysiological ranges. Recoveries for urine and plasma were between 96% and 113%. Inter- and intra-assay variations were between 2% and 9%. The limits of detection of D-lactate and L-lactate in plasma were 0.7 mumol/L and 0.2 mumol/L, respectively. The limits of detection of D-lactate and L-lactate in urine were 8.1 nmol/mmol creatinine and 4.4 nmol/mmol creatinine, respectively. Plasma and urinary levels of D- and L-lactate were increased in patients with IBD and T2DM as compared with controls. Conclusion. The presented method proved to be suitable for the quantification of D- and L-lactate and opens the possibility to explore the use of D-lactate as a biomarker.
- D-LACTIC ACID
- COLUMN-SWITCHING HPLC
- SHORT-BOWEL SYNDROME
- ENANTIOMERIC DETERMINATION
Scheijen, J. L. J. M., Hanssen, N. M., van de Waarenburg, M. P., Jonkers, D. M. A. E., Stehouwer, C. D. A., & Schalkwijk, C. G. (2012). L(+) and d(-) lactate are increased in plasma and urine samples of type 2 diabetes as measured by a simultaneous quantification of l(+) and d(-) lactate by reversed-phase liquid chromatography tandem mass spectrometry. Experimental Diabetes Research, 2012, 234812. . https://doi.org/10.1155/2012/234812