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A high-penetrance form of late-onset torsion dystonia maps to a novel locus (DYT21) on chromosome 2q14.3-q21.3
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- Norgren, Nina (author)
- Umeå universitet,Medicin
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- Mattson, Emma (author)
- Uppsala universitet,Molekylär och morfologisk patologi,Pontén
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- Forsgren, Lars (author)
- Umeå universitet,Klinisk neurovetenskap
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- (creator_code:org_t)
- 2011-02-08
- 2011
- English.
- In: Neurogenetics. - Heidelberg : Springer Science and Business Media LLC. - 1364-6745 .- 1364-6753. ; 12:2, s. 137-143
- Journal article (peer-reviewed)
Abstract
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- The primary dystonias are a genetically heterogeneous group of disorders that can be subdivided in pure dystonias, dystonia-plus syndromes, and paroxymal dystonia. Four pure autosomal dominant dystonia loci have been mapped to date, DYT1, 6, 7, and 13, with varying penetrance. We report the mapping of a novel locus for a late-onset form of pure torsion dystonia in a family from northern Sweden. The disease is inherited in an autosomal dominant manner with a penetrance that may be as high as 90%. The torsion dystonia locus in this family was mapped to chromosome 2q14.3-q21.3 using an Illumina linkage panel. We also confirmed the linkage, using ten tightly linked microsatellite markers in the region, giving a maximum LOD score of 5.59 for marker D2S1260. The disease-critical region is 3.6-8.9 Mb depending on the disease status of one individual carrying a centromeric recombination. Mutational analysis was performed on 22 genes in the disease-critical region, including all known and hypothetical genes in the smaller, 3.6-Mb region, but no disease-specific mutations were identified. Copy number variation analysis of the region did not reveal any deletions or duplications. In order to increase the chances of finding the disease gene, fine-mapping may be necessary to decrease the region of interest. This report will hopefully result in the identification of additional dystonia families with linkage to the same locus, and thereby, refinement of the disease critical region.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Medicinsk genetik (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Medical Genetics (hsv//eng)
Keyword
- Dystonia
- Late-onset
- Autosomal dominant
- Mapping
- MEDICINE
- MEDICIN
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- art (subject category)
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- Norgren, Nina
- Mattson, Emma
- Forsgren, Lars
- Holmberg, Monica
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- Umeå University
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