Charlesworth, G and Plagnol, V and Holmström, KM and Bras, J and Sheerin, UM and Preza, E and Rubio-Agusti, I and Ryten, M and Schneider, SA and Stamelou, M and Trabzuni, D and Abramov, AY and Bhatia, KP and Wood, NW (2012) Mutations in ANO3 cause dominant craniocervical dystonia: ion channel implicated in pathogenesis. Am J Hum Genet , 91 (6) 1041 - 1050. 10.1016/j.ajhg.2012.10.024.
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In this study, we combined linkage analysis with whole-exome sequencing of two individuals to identify candidate causal variants in a moderately-sized UK kindred exhibiting autosomal-dominant inheritance of craniocervical dystonia. Subsequent screening of these candidate causal variants in a large number of familial and sporadic cases of cervical dystonia led to the identification of a total of six putatively pathogenic mutations in ANO3, a gene encoding a predicted Ca(2+)-gated chloride channel that we show to be highly expressed in the striatum. Functional studies using Ca(2+) imaging in case and control fibroblasts demonstrated clear abnormalities in endoplasmic-reticulum-dependent Ca(2+) signaling. We conclude that mutations in ANO3 are a cause of autosomal-dominant craniocervical dystonia. The locus DYT23 has been reserved as a synonym for this gene. The implication of an ion channel in the pathogenesis of dystonia provides insights into an alternative mechanism that opens fresh avenues for further research.
|Title:||Mutations in ANO3 cause dominant craniocervical dystonia: ion channel implicated in pathogenesis.|
|Additional information:||PMCID: PMC3516598|
|Keywords:||Amino Acid Sequence, Base Sequence, Calcium Signaling, Chloride Channels, Corpus Striatum, Dystonia, Endoplasmic Reticulum, Exome, Female, Fibroblasts, Gene Expression Regulation, Genes, Dominant, Genetic Linkage, High-Throughput Nucleotide Sequencing, Humans, Ion Channels, Male, Molecular Sequence Data, Mutation, Pedigree, Phenotype, Sequence Alignment, Torticollis|
|UCL classification:||UCL > School of Life and Medical Sciences > Faculty of Brain Sciences > Institute of Neurology > Molecular Neuroscience|
UCL > School of Life and Medical Sciences > Faculty of Brain Sciences > Institute of Neurology > Motor Neuroscience and Movement Disorders
UCL > School of Life and Medical Sciences > Faculty of Life Sciences > Biosciences (Division of) > Genetics, Evolution and Environment > UCL Genetics Institute
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