Involvement of the tubular ClC-type exchanger ClC-5 in glomeruli of human proteinuric nephropathies

Glomerular protein handling mechanisms have received much attention in studies of nephrotic syndrome. Histopathological findings in renal biopsies from severely proteinuric patients support the likelihood of protein endocytosis by podocytes. ClC-5 is involved in the endocytosis of albumin in the pro...

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Published in:PloS one 2012-09, Vol.7 (9), p.e45605-e45605
Main Authors: Ceol, Monica, Tiralongo, Emilia, Baelde, Hans J, Vianello, Daniela, Betto, Giovanni, Marangelli, Annunziata, Bonfante, Luciana, Valente, Marialuisa, Della Barbera, Mila, D'Angelo, Angela, Anglani, Franca, Del Prete, Dorella
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Language:eng
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Summary:Glomerular protein handling mechanisms have received much attention in studies of nephrotic syndrome. Histopathological findings in renal biopsies from severely proteinuric patients support the likelihood of protein endocytosis by podocytes. ClC-5 is involved in the endocytosis of albumin in the proximal tubule. To investigate whether ClC-5 is expressed in the glomerular compartment and whether it has a role in proteinuric nephropathies. ClC-5 expression was studied using Real-time PCR in manually- and laser-microdissected biopsies from patients with type 2 diabetes (n 37) and IgA nephropathy (n 10); in biopsies of membranous glomerulopathy (MG) (n 14) immunohistochemistry for ClC-5 (with morphometric analysis) and for WT1 was done. cortical tissue (n 23) obtained from unaffected parts of tumor-related nephrectomy specimens. ClC-5 was expressed at glomerular level in all biopsies. Glomerular ClC-5 levels were significantly higher in diabetic nephropaty and MG at both mRNA and protein level (p
ISSN:1932-6203
1932-6203