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Κυριακή 18 Δεκεμβρίου 2016

Two mild cases of Dravet syndrome with truncating mutation of SCN1A

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Publication date: January 2017
Source:Brain and Development, Volume 39, Issue 1
Author(s): Toru Takaori, Akira Kumakura, Atsushi Ishii, Shinichi Hirose, Daisuke Hata
BackgroundSCN1A is the gene that codes for the neuronal voltage-gated sodium-channel alpha-subunit 1. It is generally considered that an SCN1A truncating mutation causes the severe phenotype of Dravet syndrome.PatientsWe describe 11- and 4-year-old male patients presenting with mild Dravet syndrome with a truncating mutation of SCN1A. The former patient showed moderate mental retardation; however, seizure was controlled to almost one incident a year by levetiracetam and topiramate. Carbamazepine was also effective, which is atypical of Dravet syndrome. The latter patient showed a borderline developmental quotient and did not have episodes of afebrile seizure.ConclusionTwo patients presented with mild Dravet syndrome, even though they had a truncating mutation of SCN1A. Not all truncating mutations of SCN1A cause the severe phenotype of Dravet syndrome.



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