UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

The phenotypic spectrum of DYT24 due to ANO3 mutations.

Stamelou, M; Charlesworth, G; Cordivari, C; Schneider, SA; Kägi, G; Sheerin, UM; Rubio-Agusti, I; ... Bhatia, KP; + view all (2014) The phenotypic spectrum of DYT24 due to ANO3 mutations. Mov Disord , 29 (7) pp. 928-934. 10.1002/mds.25802. Green open access

[img]
Preview
PDF
mds25802.pdf

Download (542kB)

Abstract

Genes causing primary dystonia are rare. Recently, pathogenic mutations in the anoctamin 3 gene (ANO3) have been identified to cause autosomal dominant craniocervical dystonia and have been assigned to the dystonia locus dystonia-24 (DYT24). Here, we expand on the phenotypic spectrum of DYT24 and provide demonstrative videos. Moreover, tremor recordings were performed, and back-averaged electroencephalography, sensory evoked potentials, and C-reflex studies were carried out in two individuals who carried two different mutations in ANO3. Ten patients from three families are described. The age at onset ranged from early childhood to the forties. Cervical dystonia was the most common site of onset followed by laryngeal dystonia. The characteristic feature in all affected individuals was the presence of tremor, which contrasts DYT24 from the typical DYT6 phenotype. Tremor was the sole initial manifestation in some individuals with ANO3 mutations, leading to misdiagnosis as essential tremor. Electrophysiology in two patients with two different mutations showed co-contraction of antagonist muscles, confirming dystonia, and a 6-Hz arm tremor at rest, which increased in amplitude during action. In one of the studied patients, clinically superimposed myoclonus was observed. The duration of the myoclonus was in the range of 250 msec at about 3 Hz, which is more consistent with subcortical myoclonus. In summary, ANO3 causes a varied phenotype of young-onset or adult-onset craniocervical dystonia with tremor and/or myoclonic jerks. Patients with familial cervical dystonia who also have myoclonus-dystonia as well as patients with prominent tremor and mild dystonia should be tested for ANO3 mutations. © 2014 International Parkinson and Movement Disorder Society.

Type: Article
Title: The phenotypic spectrum of DYT24 due to ANO3 mutations.
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/mds.25802
Publisher version: http://dx.doi.org/10.1002/mds.25802
Additional information: © 2014 The Authors. Movement Disorders published by International Parkinson and Movement Disorder Society This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Keywords: ANO3, DYT24, cervical dystonia, cranial dystonia, dystonic tremor, laryngeal dystonia
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Clinical and Movement Neurosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Department of Neuromuscular Diseases
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > ION Central Administration
URI: http://discovery.ucl.ac.uk/id/eprint/1423399
Downloads since deposit
0Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item