Complete resolution of imidodipeptide mixtures in urine of prolidase-deficient patients using micellar electrokinetic chromatography

Journal of Chromatography. a
R GrimmP Iadarola

Abstract

The use of capillary zone electrophoresis as an efficient method for the identification of urinary imidodipeptides of prolidase-deficient patients has already been reported. However, owing to the complexity of the components excreted, the resolution of electrophoretic patterns obtained was poor. Here we examine the use of micellar electrokinetic chromatography to enhance peak resolution in order to obtain better insight into the electropherograms of patients' urine. The usefulness of sodium dodecyl sulphate as surfactant is reported: refined electropherograms were achieved using 35 mM sodium borate, pH 8.3 containing 65 mM sodium dodecyl sulphate. Almost all peaks were baseline separated, collected and sequenced. This allowed us to define the exact imidodipeptide composition of patients' urine. The possibility of identifying and thus quantifying each single peak means that comparison of urinary imidodipeptide excretion patterns from different patients can be made and the hypothesis that peptide patterns can be correlated with differing clinical severity can be investigated.

References

Sep 11, 1992·Journal of Chromatography·M ZhuC Siebert
Aug 11, 1989·Journal of Chromatography·B L KargerA Guttman
Sep 30, 1994·Journal of Chromatography. a·N Matsubara, S Terabe
May 28, 1993·Journal of Chromatography·M H Langenhuizen, P S Janssen

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Citations

Sep 6, 2003·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·Anna LupiAntonella Forlino
Mar 22, 2001·The British Journal of Dermatology·K DyneP Iadarola
Nov 22, 2005·Analytical Biochemistry·Biji T KurienR Hal Scofield
Jan 26, 2006·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·Simona ViglioPaolo Iadarola
Dec 22, 1999·Electrophoresis·V Kasicka

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