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  • Title: Capillary electrophoresis mass spectrometry as a potential tool to detect lithium-induced nephropathy: Preliminary results.
    Author: Raedler TJ, Wittke S, Jahn H, Koessler A, Mischak H, Wiedemann K.
    Journal: Prog Neuropsychopharmacol Biol Psychiatry; 2008 Apr 01; 32(3):673-8. PubMed ID: 18155820.
    Abstract:
    Lithium remains the treatment of choice for many patients suffering from bipolar disorder. However, long-term treatment with lithium carries the potential to cause renal and thyroid dysfunction. Lithium-induced nephropathies are characterised by deterioration of urinary concentrating ability as well as, less frequently, a progressive and potentially irreversible decrease in glomerular filtration rate (GFR). Pathological changes after treatment with lithium include both tubulointerstitial and glomerular changes. Besides monitoring of the kidney-function, no screening-instruments exist for early identification of patients at risk of lithium-induced nephropathy. CE-MS (capillary electrophoresis coupled to a mass spectrometer) is a new technique that has been applied to the differential diagnosis of nephropathies. We sought to determine if CE-MS can be used to identify lithium-induced renal changes. A urine-sample was obtained from 14 subjects (7 males, 7 females, mean age 51.1 years) under long-term treatment with lithium (mean duration 17.4 years, range 8-35 years) without known nephropathy (mean creatinine 0.96 mg/dl; range 0.7-1.6). Urine samples were stored at -20 degrees C until analysis. CE-MS was performed according to standard procedures and a screen for nephropathies was used. Among the 14 urine samples, two subjects tested positive for a nephropathy. One further subject had a borderline result. Since 3/14 subjects with no known nephropathy showed some degree of pathological findings, CE-MS from a urine-sample may be helpful for the early detection of renal damage under treatment with lithium. However, a specific screen for lithium-induced nephropathies still needs to be developed.
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