Bentham Open, Open Urology and Nephrology Journal, 1(9), p. 88-93, 2016
DOI: 10.2174/1874303x01609010088
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Background: Steroid resistant nephrotic syndrome (SRNS) is increasingly recognised to have a genetic basis following the identification of a number of mutations within genes encoding podocyte and basement membrane proteins. The ARHGAP24 gene product is a recently recognised important player in podocyte interaction with the glomerular basement membrane. The ARHGAP24 gene encodes a protein involved in regulating cell motility, membrane structure and polarity. Mutations in the gene have been shown in vitro to cause cell membrane ruffling. Case Presentation: We report a novel missense mutation in exon 4 (c.[284G>A]; p.[Arg95Gln]) of the ARHGAP24 gene in a child that presented with SRNS at four years of age. Renal biopsy demonstrated unusual polypoid changes of the glomerular basement membrane (GBM). Conclusion: We propose this novel ARHGAP24 mutation as causative for SRNS associated with unusual polypoid basement membrane changes. These biopsy findings, in association with ARHGAP24 mutation and clinical nephrotic syndrome are a novel finding. This finding may advance the understanding of ARHGAP24 gene product function.