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Familial frontotemporal dementia with amyotrophic lateral sclerosis and a shared haplotype on chromosome 9p

Pearson, Justin P., Williams, Nigel Melville, Majounie, Elisa, Waite, Adrian James, Stott, Jennifer, Newsway, Victoria, Murray, Alexandra, Hernandez, Dena, Guerreiro, Rita, Singleton, Andrew B., Neal, James William and Morris, Huw Rees 2011. Familial frontotemporal dementia with amyotrophic lateral sclerosis and a shared haplotype on chromosome 9p. Journal of Neurology 258 (4) , pp. 647-655. 10.1007/s00415-010-5815-x

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Abstract

Families with autosomal dominant frontotemporal dementia and amyotrophic lateral sclerosis (FTD/ALS) have previously been linked to a locus on chromosome 9p21. We describe the clinical phenotype and pathology of a large family with autosomal dominant FTD/ALS with nine affected members originating from Gwent in South Wales, UK. We also further refine the locus on chromosome 9p21 using a haplotype sharing approach and assess heterogeneity in 9p21 linked families. Within this family, affected individuals present with either FTD or ALS or both diseases simultaneously. In addition there was marked phenotypic variation including ataxia, Parkinsonism, psychosis and visuo-spatial cognitive deficits. The pathological features of the three cases described were consistent with type 2 FTD pathology, as previously reported in similar families. However, we also report distinctive cerebellar and glial pathology and a significant proportion of TDP-43 negative inclusions. No mutations in known genes for FTD or ALS were found. We identified a large 4.8-megabase haplotype on chromosome 9p21, which was shared by all affected family members. This haplotype overlaps and limits the previously reported FTD/ALS linkage region on chromosome 9p21. Sequencing of this region did not identify any evidence of a pathogenic exonic mutation. This suggests that the pathogenic change affects non-coding DNA and that the disease is caused by variation in gene or protein expression.

Item Type: Article
Date Type: Publication
Status: Published
Schools: MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Medicine
Neuroscience and Mental Health Research Institute (NMHRI)
Subjects: Q Science > QH Natural history > QH426 Genetics
R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Uncontrolled Keywords: frontotemporal dementia, amyotrophic lateral sclerosis, mendelian, chromosome 9
Publisher: Springer
ISSN: 0340-5354
Last Modified: 06 Jul 2019 23:53
URI: http://orca-mwe.cf.ac.uk/id/eprint/23187

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