Determination of uremic solutes in biological fluids of chronic kidney disease patients by HPLC assay |
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Authors: | Calaf Raymond Cerini Claire Génovésio Cécile Verhaeghe Pierre Jourde-Chiche Noémie Bergé-Lefranc David Gondouin Bertrand Dou Laetitia Morange Sophie Argilés Angel Rathelot Pascal Dignat-George Françoise Brunet Philippe Charpiot Philippe |
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Affiliation: | Laboratoire de Biochimie Moléculaire Fondamentale et Clinique, UFR de Pharmacie, Université de la Méditerranée, 27 boulevard Jean Moulin, 13 385 Marseille cedex 5, France. raymond.calaf@univmed.fr |
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Abstract: | During chronic kidney disease (CKD), solutes called uremic solutes, accumulate in blood and tissues of patients. We developed an HPLC method for the simultaneous determination of several uremic solutes of clinical interest in biological fluids: phenol (Pol), indole-3-acetic acid (3-IAA), p-cresol (p-C), indoxyl sulfate (3-INDS) and p-cresol sulfate (p-CS). These solutes were separated by ion-pairing HPLC using an isocratic flow and quantified with a fluorescence detection. The mean serum concentrations of 3-IAA, 3-INDS and p-CS were 2.12, 1.03 and 13.03 μM respectively in healthy subjects, 3.21, 17.45 and 73.47 μM in non hemodialyzed stage 3-5 CKD patients and 5.9, 81.04 and 120.54 μM in hemodialyzed patients (stage 5D). We found no Pol and no p-C in any population. The limits of quantification for 3-IAA, 3-INDS, and p-CS were 0.83, 0.72, and 3.2 μM respectively. The within-day CVs were between 1.23 and 3.12% for 3-IAA, 0.98 and 2% for 3-INDS, and 1.25 and 3.01% for p-CS. The between-day CVs were between 1.78 and 5.48% for 3-IAA, 1.45 and 4.54% for 3-INDS, and 1.19 and 6.36% for p-CS. This HPLC method permits the simultaneous and quick quantification of several uremic solutes for daily analysis of large numbers of samples. |
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