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Rapid Determination of L-2-Hydoxyglutaric Acid in Urine Samples By Capillary Electrophoresis with Indirect Uv Detection
(2020) Cansever, Mehmet Şerif; Kalaycıoğlu, Zeynep; Erim, Fatma Bedia; Zübarioğlu, Tanyel; Kıykım, Ertuğrul; Zeybek, Ayşe Çiğdem Aktuğlu
Aim: L-2-hydroxyglutaric aciduria (L2HGA) which is autosomal recessive and characterized by psychomotor retardation, cerebellarataxia, variable macrocephaly, and epilepsy is a rarely seen neurometabolic disease. The disease is biochemically identified by slightlyincreased L-2HGA levels in urine, cerebrospinal fluid, and plasma.Materials and Methods: A sensitive and rapid capillary electrophoretic technique was used for the determination of L2HGA in urine.Since the L2HGA lacks of chromophore, an indirect UV detection method was applied.Results: The running electrolyte consisted of 10 mmol/L 2,6-pyridinedicarboxylic acid (PDC) at pH 5.6 containing 0.1 mmol/L ofcetyltrimethylammonium bromide (CTAB). PDC was chosen because of its good chromophoric property for indirect UV detection. CTABwas used as electro-osmotic flow (EOF) reversal. The method was well-validated in the selected conditions. The detection limit of themethod L2HGA was 1.16 ?mol/L. The migration time of L2HGA was less than 2.0 min.Conclusion: The developed method was applied to the urine samples collected from 16 patients who suffer from L-2-hydroxyglutaricaciduria and 4 healthy volunteers.