An untranslated CTG expansion causes a novel form of spinocerebellar ataxia (SCA8)
- PMID: 10192387
- DOI: 10.1038/7710
An untranslated CTG expansion causes a novel form of spinocerebellar ataxia (SCA8)
Abstract
Myotonic dystrophy (DM) is the only disease reported to be caused by a CTG expansion. We now report that a non-coding CTG expansion causes a novel form of spinocerebellar ataxia (SCA8). This expansion, located on chromosome 13q21, was isolated directly from the genomic DNA of an ataxia patient by RAPID cloning. SCA8 patients have expansions similar in size (107-127 CTG repeats) to those found among adult-onset DM patients. SCA8 is the first example of a dominant SCA not caused by a CAG expansion translated as a polyglutamine tract.
Comment in
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Are (CTG)n expansions at the SCA8 locus rare polymorphisms?Nat Genet. 2000 Mar;24(3):213; author reply 215. doi: 10.1038/73408. Nat Genet. 2000. PMID: 10700167 No abstract available.
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Large, expanded repeats in SCA8 are not confined to patients with cerebellar ataxia.Nat Genet. 2000 Mar;24(3):214-5. doi: 10.1038/73411. Nat Genet. 2000. PMID: 10700168 No abstract available.
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