| Summary: | Background: Heavy proteinuria may be caused by either increased glomerulal basement membrane permeability or membrane or podocyte structural damage, and also by impairment of secretion-reabsorption tubular processes. In this study, 60 patients with nephrotic proteinuria and other diagnoses (lupus nephritis, membranous nephropathy, IgA nephropathy, Wegener's granulomatosis) and 20 patients with Anderson-Fabry disease (AFD),which is an X-linked genetic disorder with deficient a-galactosidase A activity, were analysed by the 2D electrophoresis method. The main aim of this work was to investigate possible differences in urine proteins in nephropaties, between healthy controls and AFD patients and to identify abnormal proteins as potential biomarkers of disease. Methods: The urine proteins were devided by isoelectric focusing method using polyacrylamide strips (pH 3-10 linear). The second dimensional SDS electrophoresis was performed in 12 % polyacrylamide gel. The proteins were visualized by silver method and selected proteins were identified by MALDI-TOF MS. The gels were evaluated by Phoretix 2D expression software 2005. Results: We found out that without adding protease inhibitors we can detect proteolysis, with increased quantity of proteins manifested in the area about 10 kDa and decreased quantity...
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