'North Sea' progressive myoclonus epilepsy: phenotype of subjects with GOSR2 mutation
Lysa Boisse Lomax, Marta A Bayly, Helle Hjalgrim, Rikke S Moller, Annemarie M Vlaar, Kari M Aaberg, Iris Marquardt, Luke C Gandolfo, Michel Willemsen, Erik-Jan Kamsteeg, John D O'Sullivan, G Christoph Korenke, Bastiaan R Bloem, Irenaeus F de Coo, Judith MA Verhagen, Ines Said, Trine Prescott, Asbjorg Stray-Pedersen, Magnhild Rasmussen, Danya F Vears Show all
BRAIN | OXFORD UNIV PRESS | Published : 2013
We previously identified a homozygous mutation in the Golgi SNAP receptor complex 2 gene (GOSR2) in six patients with progressive myoclonus epilepsy. To define the syndrome better we analysed the clinical and electrophysiological phenotype in 12 patients with GOSR2 mutations, including six new unrelated subjects. Clinical presentation was remarkably similar with early onset ataxia (average 2 years of age), followed by myoclonic seizures at the average age of 6.5 years. Patients developed multiple seizure types, including generalized tonic clonic seizures, absence seizures and drop attacks. All patients developed scoliosis by adolescence, making this an important diagnostic clue. Additional s..View full abstract
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Awarded by National Health and Medical Research Council
This work was supported by a National Health and Medical Research Council grant to SB (Program Grant ID: 628952). Fellowship funding for LBL was provided by the Detweiler Travelling Fellowship (Royal College of Physicians and Surgeons of Canada) and by the Cecil Patience Reid Fellowship (Queen's University, Kingston, ON, Canada).