Article ; Online: A
2016 Volume 54, Issue 3, Page(s) 202–211
Abstract: Background: Early myoclonic encephalopathy (EME), a disease with a devastating prognosis, is characterised by neonatal onset of seizures and massive myoclonus accompanied by a continuous suppression-burst EEG pattern. Three genes are associated with ... ...
Abstract | Background: Early myoclonic encephalopathy (EME), a disease with a devastating prognosis, is characterised by neonatal onset of seizures and massive myoclonus accompanied by a continuous suppression-burst EEG pattern. Three genes are associated with EMEs that have metabolic features. Here, we report a pathogenic mutation of an ion channel as a cause of EME for the first time. Methods: Sequencing was performed for 214 patients with epileptic seizures using a gene panel with 109 genes that are known or suspected to cause epileptic seizures. Functional assessments were demonstrated by using electrophysiological experiments and immunostaining for mutant γ-aminobutyric acid-A (GABA Results: We discovered a Conclusion: This mutation has complex functional effects on GABA |
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MeSH term(s) | Brain/diagnostic imaging ; Brain/physiopathology ; Crystallography, X-Ray ; Electroencephalography ; HEK293 Cells ; Humans ; Infant ; Male ; Models, Molecular ; Mutation, Missense ; Opsoclonus-Myoclonus Syndrome/genetics ; Opsoclonus-Myoclonus Syndrome/physiopathology ; Receptors, GABA-A/chemistry ; Receptors, GABA-A/genetics ; Seizures/genetics ; Seizures/physiopathology ; Spasms, Infantile/genetics ; Spasms, Infantile/physiopathology |
Chemical Substances | GABRB2 protein, human ; Receptors, GABA-A |
Language | English |
Publishing date | 2016-10-27 |
Publishing country | England |
Document type | Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't |
ZDB-ID | 220881-7 |
ISSN | 1468-6244 ; 0022-2593 |
ISSN (online) | 1468-6244 |
ISSN | 0022-2593 |
DOI | 10.1136/jmedgenet-2016-104083 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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