A novel SGCE gene mutation causing myoclonus dystonia in a family with an unusual phenotype
Article first published online: 17 NOV 2011
© 2011 The Author(s)/Acta Pædiatrica © 2011 Foundation Acta Pædiatrica
Volume 101, Issue 2, pages e90–e92, February 2012
How to Cite
Tedroff, K., Rolfs, A. and Norling, A. (2012), A novel SGCE gene mutation causing myoclonus dystonia in a family with an unusual phenotype. Acta Paediatrica, 101: e90–e92. doi: 10.1111/j.1651-2227.2011.02502.x
- Issue published online: 9 JAN 2012
- Article first published online: 17 NOV 2011
- Accepted manuscript online: 25 OCT 2011 09:10AM EST
- Received 30 August 2011; accepted 21 October 2011.
- SGCE mutation
Background: Myoclonus dystonia is an autosomal dominant dystonia-plus syndrome, characterized by symptom variability within families. Most often is the myoclonus the most debilitating symptom, and many patients report myoclonus reduction after alcohol intake. In several families, mutations in the SGCE gene have been identified.
Method: We report of a three-generation family with myoclonus dystonia displaying a varied phenotype and maternal imprinting. Additionally, this family displays some unusual clinical presentations including alcohol-induced dystonia in an adult man, which will be discussed.
Results: A novel mutation c.386T>C [p.I129T] was found within exon 3 of the SGCE gene in all three affected family members. In addition, two additional mutations [c.305G>A and IVS3+15G>A], judged to be polymorphisms in the SGCE gene, were found in two affected and one healthy family member.
Conclusions: This report presents a novel mutation in the SGCE gene causing myoclonus dystonia and extends the phenotype of myoclonus dystonia to also include alcohol-induced dystonia.