Podocytes regulate the glomerular basement membrane protein nephronectin by means of miR-378a-3p in glomerular diseases.
Kidney Int
; 92(4): 836-849, 2017 10.
Article
em En
| MEDLINE
| ID: mdl-28476557
ABSTRACT
The pathophysiology of many proteinuric kidney diseases is poorly understood, and microRNAs (miRs) regulation of these diseases has been largely unexplored. Here, we tested whether miR-378a-3p is a novel regulator of glomerular diseases. MiR-378a-3p has two predicted targets relevant to glomerular function, the glomerular basement membrane matrix component, nephronectin (NPNT), and vascular endothelial growth factor VEGF-A. In zebrafish (Danio rerio), miR-378a-3p mimic injection or npnt knockdown by a morpholino oligomer caused an identical phenotype consisting of edema, proteinuria, podocyte effacement, and widening of the glomerular basement membrane in the lamina rara interna. Zebrafish vegf-A protein could not rescue this phenotype. However, mouse Npnt constructs containing a mutated 3'UTR region prevented the phenotype caused by miR-378a-3p mimic injection. Overexpression of miR-378a-3p in mice confirmed glomerular dysfunction in a mammalian model. Biopsies from patients with focal segmental glomerulosclerosis and membranous nephropathy had increased miR-378a-3p expression and reduced glomerular levels of NPNT. Thus, miR-378a-3p-mediated suppression of the glomerular matrix protein NPNT is a novel mechanism for proteinuria development in active glomerular diseases.
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Assunto principal:
Glomerulosclerose Segmentar e Focal
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Glomerulonefrite Membranosa
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Proteínas da Matriz Extracelular
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MicroRNAs
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Membrana Basal Glomerular
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article