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Dimuccio, Veronica; Ranghino, Andrea; Praticò Barbato, Loredana; Fop, Fabrizio; Biancone, Luigi; Camussi, Giovanni; Bussolati, Benedetta
PloS one, 08/2014, Letnik: 9, Številka: 8Journal Article
Extracellular vesicles (EVs) present in the urine are mainly released from cells of the nephron and can therefore provide information on kidney function. We here evaluated the presence of vesicles expressing the progenitor marker CD133 in the urine of normal subjects and of patients undergoing renal transplant. We found that EV expressing CD133 were present in the urine of normal subjects, but not of patients with end stage renal disease. The first day after transplant, urinary CD133+ EVs were present at low levels, to increase thereafter (at day 7). Urinary CD133(+) EVs significantly increased in patients with slow graft function in respect to those with early graft function. In patients with a severe pre-transplant vascular damage of the graft, CD133(+) EVs did not increase at day 7. At variance, the levels of EVs expressing the renal exosomal marker CD24 did not vary in the urine of patients with end stage renal disease or in transplanted patients in respect to controls. Sorted CD133(+) EVs were found to express glomerular and proximal tubular markers. These data indicate that urinary CD133(+) EVs are continuously released during the homeostatic turnover of the nephron and may provide information on its function or regenerative potential.
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