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ABSTRACT: Background
Isolated focal dystonia (IFD) is a heterogeneous group of potentially invalidating movement disorders. The etiopathogenesis is complex, both genetic and environmental factors playing a role, but remains elusive. The CACNA1B gene codes for the N-type neuronal voltage-gated calcium channels CaV2.2, which may play a role in the development of some IFD.Methods
We analyzed samples from the GENDYS cohort for mutations in CACNA1B gene, using targeted next-generation sequencing (NGS).Results
The GENDYS cohort consists of 120 people with adult-onset IFD (cervical dystonia 47.5%, blepharospasm 47.2%, others 8.3%). Of these, 35% had subsequent topographical extension. Average age at onset was 42 and average disease durations 8 years. Targeted NGS revealed a novel frameshift mutation c.2291AGG?>?A, in exon 19, and a previously reported variant, c.6834T?>?G, in exon 47.Conclusion
Our findings suggest that disease-causing mutations in CACNA1B gene may be involved in the development of some adult-onset IFD. To our knowledge, this is the first study that identified a disease-causing CACNA1B gene mutation in association with adult-onset IFD.
SUBMITTER: Cocos R
PROVIDER: S-EPMC7870633 | biostudies-literature | 2021 Mar
REPOSITORIES: biostudies-literature
Cocoș Relu R Raicu Florina F Băjenaru Ovidiu Lucian OL Olaru Iulia I Dumitrescu Laura L Popescu Bogdan Ovidiu BO
Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology 20201013 3
<h4>Background</h4>Isolated focal dystonia (IFD) is a heterogeneous group of potentially invalidating movement disorders. The etiopathogenesis is complex, both genetic and environmental factors playing a role, but remains elusive. The CACNA1B gene codes for the N-type neuronal voltage-gated calcium channels CaV2.2, which may play a role in the development of some IFD.<h4>Methods</h4>We analyzed samples from the GENDYS cohort for mutations in CACNA1B gene, using targeted next-generation sequencin ...[more]