Genetic seizure susceptibility underlying acute encephalopathies in childhood

Katsuhiro Kobayashi, Mamoru Ouchida, Akihisa Okumura, Yoshihiro Maegaki, Itsuko Nishiyama, Hideki Matsui, Yoko Ohtsuka, Iori Ohmori

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We herein investigated risk factors of pediatric acute encephalopathy (AE) regarding the hitherto uncharacterized genetic background of seizure susceptibility underlying the pathogenesis of AE. The study included 15 patients with a history of various types of AE in childhood. We undertook the mutational analysis of the neuronal sodium channel alpha 1 subunit (SCN1A) gene which is the most representative gene for hyperthermia-induced seizure susceptibility.Six patients (40%) had a positive family history of seizures or AE, especially febrile seizures, in first- or second-degree relatives. The SCN1A-R1575C mutation was detected in a patient with a history of acute encephalitis with refractory, repetitive partial seizures (AERRPS) and also in the patient's apparently healthy father.In the present study, dense familial seizure predisposition was present in the patients with AE. Although the presence of seizure susceptibility alone is insufficient to cause AE, it can exacerbate seizures and the subsequent development of inflammatory reactions in the brain when environmental factors are included. Genetic seizure susceptibility may contribute to some types of AE in childhood.

Original languageEnglish
Pages (from-to)143-152
Number of pages10
JournalEpilepsy Research
Volume91
Issue number2-3
DOIs
Publication statusPublished - Oct 1 2010

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Keywords

  • Acute encephalopathy
  • Childhood
  • Febrile seizure
  • Genetics
  • SCN1A
  • Seizure susceptibility

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

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