Development of a multiplex ligation-dependent probe amplification assay for diagnosis and estimation of the frequency of spinocerebellar ataxia type 15.

Details

Serval ID
serval:BIB_03F08B64E87F
Type
Article: article from journal or magazin.
Collection
Publications
Title
Development of a multiplex ligation-dependent probe amplification assay for diagnosis and estimation of the frequency of spinocerebellar ataxia type 15.
Journal
Clinical Chemistry
Author(s)
Ganesamoorthy D., Bruno D.L., Schoumans J., Storey E., Delatycki M.B., Zhu D., Wei M.K., Nicholson G.A., McKinlay Gardner R.J., Slater H.R.
ISSN
1530-8561 (Electronic)
ISSN-L
0009-9147
Publication state
Published
Issued date
2009
Volume
55
Number
7
Pages
1415-1418
Language
english
Notes
Publication types: Journal ArticlePublication Status: ppublish. PDF type: Brief Communication
Abstract
BACKGROUND: Spinocerebellar ataxia type 15 (SCA15) is a slowly progressive neurodegenerative disorder characterized by cerebellar ataxia. Mutation of the ITPR1 gene (inositol 1,4,5-triphosphate receptor, type 1) has been identified recently as the underlying cause, and in most cases the molecular defect is a multiexon deletion. To date, 5 different SCA15 families have been identified with ITPR1 gene deletion.
METHODS: We have designed a synthetic, dual-color multiplex ligation-dependent probe amplification (MLPA) assay that measures copy number with high precision in selected exons across the entire length of ITPR1 and the proximal region of the neighboring gene, SUMF1 (sulfatase modifying factor 1). We screened 189 idiopathic ataxic patients with this MLPA assay.
RESULTS: We identified ITPR1 deletion of exons 1-10 in the previously reported AUS1 family (4 members) and deletion of exons 1-38 in a new family (2 members). In addition to the multiexon deletions, apparent single-exon deletions identified in 2 other patients were subsequently shown to be due to single-nucleotide changes at the ligation sites.
CONCLUSIONS: The frequency of ITPR1 deletions is 2.7% in known familial cases. This finding suggests that SCA15 is one of the "less common" SCAs. Although the deletions in the 5 families identified worldwide thus far have been of differing sizes, all share deletion of exons 1-10. This region may be important, both in terms of the underlying pathogenetic mechanism and as a pragmatic target for an accurate, robust, and cost-effective diagnostic analysis.
Keywords
Australia/epidemiology, DNA Probes, Gene Amplification, Humans, Inositol 1,4,5-Trisphosphate Receptors/genetics, Sequence Deletion, Spinocerebellar Ataxias/diagnosis, Spinocerebellar Ataxias/epidemiology, Sulfatases/genetics
Pubmed
Web of science
Open Access
Yes
Create date
31/10/2013 17:17
Last modification date
20/08/2019 12:25
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