Document Detail

C4d as a diagnostic tool in membranous nephropathy.
MedLine Citation:
PMID:  22592419     Owner:  NLM     Status:  Publisher    
Introduction: membranous nephropathy (MN) is the most common cause of nephrotic syndrome in adults. The diagnosis is based on typical findings observed using electron microscope (EM) and immunofluorescence (IF) studies. On some occasions, tissues are only available for analysis using an optical microscope (OM); in these cases, it can be difficult to differentiate between MN and minimal change disease (MCD). Recently, the use of C4d immunohistochemical staining has spread. Very little information is available regarding C4d deposits in MN. Our study consisted of analysing whether C4d staining of samples embedded in paraffin could be useful for diagnosing MN. Material and Method: Ours was a retrospective study including all patients diagnosed with MN by renal biopsy in our unit between January 2001 and October 2008. We only included adult patients with a definitive diagnosis of MN or idiopathic MCD by OM, IF, and ME studies. In October 2008, 3µm sections of renal tissue fixed in formaldehyde were removed from paraffin and rehydrated. The samples were then stained for C4d immunohistochemical analysis using anti-human polyclonal antibodies obtained from rabbits. Results: Our study included a final sample of 19 patients with MCD and 21 with MN. No C4d deposits were observed in any of the glomeruli in patients with MCD, and 100% of these patients were classified as negative. However, C4d deposits were detected in 100% of patients with MN, and were observable in all glomeruli with a uniform granular distribution, demarcating all capillary loops. Conclusions: C4d immunohistochemical staining is a very useful tool for diagnosing MN.
Mario Espinosa-Hernández; Rosa Ortega-Salas; María López-Andreu; José M Gómez-Carrasco; M José Pérez-Sáez; Carlos Pérez-Seoane; Pedro Aljama-García
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Publication Detail:
Journal Detail:
Title:  Nefrologia : publicacion oficial de la Sociedad Espanola Nefrologia     Volume:  32     ISSN:  1989-2284     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8301215     Medline TA:  Nefrologia     Country:  -    
Other Details:
Languages:  ENG; SPA     Pagination:  295-299     Citation Subset:  -    
Vernacular Title:
C4d como herramienta diagnóstica en la nefropatía membranosa.
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