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Am J Physiol Renal Physiol. 2016 Nov 1;311(5):F1015-F1024. doi: 10.1152/ajprenal.00283.2016. Epub 2016 Sep 28.

Characterization and phosphoproteomic analysis of a human immortalized podocyte model of Fabry disease generated using CRISPR/Cas9 technology.

Author information

1
Laboratory of Immunogenetics and Molecular Biology, Federal University of Piaui, Teresina, Brazil.
2
Renal-Electrolyte Division, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; and.
3
Laboratory of Immunogenetics and Molecular Biology, Federal University of Piaui, Teresina, Brazil; semiramis@ufpi.edu.br.
4
Division of Biomedical Informatics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.

Abstract

Fabry nephropathy is a major cause of morbidity and premature death in patients with Fabry disease (FD), a rare X-linked lysosomal storage disorder. Gb3, the main substrate of α-galactosidase A (α-Gal A), progressively accumulates within cells in a variety of tissues. Establishment of cell models has been useful as a tool for testing hypotheses of disease pathogenesis. We applied CRISPR/Cas9 genome editing technology to the GLA gene to develop human kidney cell models of FD in human immortalized podocytes, which are the main affected renal cell type. Our podocytes lack detectable α-Gal A activity and have increased levels of Gb3. To explore different pathways that could have distinct patterns of activation under conditions of α-gal A deficiency, we used a high-throughput antibody array to perform phosphorylation profiling of CRISPR/Cas9-edited and control podocytes. Changes in both total protein levels and in phosphorylation status per site were observed. Analysis of our candidate proteins suggests that multiple signaling pathways are impaired in FD.

KEYWORDS:

CRISPR/Cas9; Fabry nephropathy; podocyte

PMID:
27681560
PMCID:
PMC5130460
DOI:
10.1152/ajprenal.00283.2016
[Indexed for MEDLINE]
Free PMC Article

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