title: Complete resolution of imidodipeptide mixtures in urine of prolidase-deficient patients using micellar electrokinetic chromatography.
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.
authors.affiliation: Analytical Division, Hewlett-Packard GmbH, Waldbronn, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Grimm
authors.forename: G
authors.initials: G
authors.lastname: Zanaboni
authors.forename: S
authors.initials: S
authors.lastname: Viglio
authors.forename: K
authors.initials: K
authors.lastname: Dyne
authors.forename: M
authors.initials: M
authors.lastname: Valli
authors.forename: G
authors.initials: G
authors.lastname: Cetta
authors.forename: P
authors.initials: P
authors.lastname: Iadarola
mesh_terms: D000293:Adolescent; D000328:Adult; D002845:Chromatography / Q000379:methods*; D004150:Dipeptidases / Q000172:deficiency*; D004151:Dipeptides / Q000652:urine*; D019075:Electrophoresis, Capillary; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012967:Sodium Dodecyl Sulfate / Q000494:pharmacology
chemical_list: D004151:Dipeptides; D012967:Sodium Dodecyl Sulfate; D004150:Dipeptidases; C022449:proline dipeptidase