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Title

Deletion at ITPR1 Underlies Ataxia in Mice and Spinocerebellar Ataxia 15 in Humans

Authorsvan de Leemput, Joyce; Chandran, Jayanth; Knight, Melanie A.; Holtzclaw, Lynne A.; Scholz, Sonja; Cookson, Mark R.; Houlden, Henry; Gwinn-Hardy, Katrina; Fung, Hon-Chung; Lin, Xian; Hernández, Dena; Simón-Sánchez, Javier CSIC; Wood, Nick W.; Giunti, Paola; Rafferty, Ian; Hardy, John; Storey, Elsdon; McKinlay Gardner, R. J.; Forrest, Susan M.; Fisher, Elizabeth M. C.; Russell, James T.; Cai, Huaibin; Singleton, Andrew B.
Issue Date22-Jun-2007
PublisherPublic Library of Science
CitationPLoS Genet. 2007 June; 3(6): e108
AbstractWe observed a severe autosomal recessive movement disorder in mice used within our laboratory. We pursued a series of experiments to define the genetic lesion underlying this disorder and to identify a cognate disease in humans with mutation at the same locus. Through linkage and sequence analysis we show here that this disorder is caused by a homozygous in-frame 18-bp deletion in Itpr1 (Itpr1Δ18/Δ18), encoding inositol 1,4,5-triphosphate receptor 1. A previously reported spontaneous Itpr1 mutation in mice causes a phenotype identical to that observed here. In both models in-frame deletion within Itpr1 leads to a decrease in the normally high level of Itpr1 expression in cerebellar Purkinje cells. Spinocerebellar ataxia 15 (SCA15), a human autosomal dominant disorder, maps to the genomic region containing ITPR1; however, to date no causal mutations had been identified. Because ataxia is a prominent feature in Itpr1 mutant mice, we performed a series of experiments to test the hypothesis that mutation at ITPR1 may be the cause of SCA15. We show here that heterozygous deletion of the 5′ part of the ITPR1 gene, encompassing exons 1–10, 1–40, and 1–44 in three studied families, underlies SCA15 in humans.
URIhttp://hdl.handle.net/10261/3579
DOI10.1371/journal.pgen.0030108
ISSN1553-7404
Appears in Collections:(IBV) Artículos

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picrender.pdfPrincipal355,05 kBAdobe PDFThumbnail
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pgen.0030108.sg001.tifFigure S1: Schematic of Genotyping Results across Mouse Chromosome 6 in Affected Mice10,18 MBTIFFThumbnail
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pgen.0030108.sg002.tifFigure S2: Sequence of Exon 36 of Itpr1 from Four Mice5,15 MBTIFFThumbnail
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pgen.0030108.sg003.tifFigure S3: Additional Families Harboring Deletion at the SCA15 Locus6,83 MBTIFFThumbnail
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pgen.0030108.sg004.tifFigure S4: Deleted Regions Identified in Families AUS1 and H27876,45 kBTIFFThumbnail
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Comentario_figuras.pdfArchivo adicional 115,35 kBAdobe PDFThumbnail
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