Nestin is a novel marker for renal tubulointerstitial injury in immunoglobulin A nephropathy

Nephrology
Mai TomiokaYoshihisa Nojima

Abstract

Nestin, an intermediate filament originally identified as a marker of neural progenitor cells, is transiently expressed in endothelial cells and tubuloepithelial cells during kidney development. However, in adult kidneys, podocytes are the only cells that express nestin. In this study, we examined tubulointerstitial nestin expression in human glomerulonephritis. Renal biopsy specimens obtained from 41 adult patients with immunoglobulin (Ig)A nephropathy were studied. Nestin expression was determined by immunohistochemical staining and estimated by digital image analysis. To identify the phenotype of nestin-positive cells, a double immunofluorescent study was performed for nestin and CD34 (a marker for endothelial cells) or alpha-smooth muscle actin (alpha-SMA, a marker for myofibroblasts). In normal kidney, nestin expression was restricted to the podocytes and was not detected in tubular cells and tubulointerstitial cells. In contrast, increased nestin expression was observed at tubulointerstitial areas of IgA nephropathy. The degree of tubulointerstitial nestin expression was positively correlated with tubulointerstitial fibrosis (r = 0.546, P < 0.001). The double immunofluorescent study showed that most nestin-positive cells ...Continue Reading

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Sep 29, 2011·American Journal of Nephrology·Donghai WenJing Chen
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