Novel SCN1A frameshift mutation with absence of truncated Nav1.1 protein in severe myoclonic epilepsy of infancy.
Novel SCN1A frameshift mutation with absence of truncated Nav1.1 protein in severe myoclonic epilepsy of infancy.
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DOI:
10.1002/ajmg.a.32448
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发表时间:
2008-09-15
影响因子:
2
通讯作者:
George, Alfred L., Jr.
中科院分区:
文献类型:
--
作者:
McArdle, Erin J.;Kunic, Jennifer D.;George, Alfred L., Jr.
Severe myoclonic epilepsy of infancy (SMEI) or Dravet syndrome (OMIM 607208) is a severe epileptic encephalopathy with onset during the first year of life with devastating neurological sequelae [Dravet et al., 1992; Wolff et al., 2006]. Typically, SMEI presents during infancy with febrile seizures often followed by a prolonged period of drug-refractory epilepsy with repeated bouts of status epilepticus. Patients exhibit early developmental delays, progressive cognitive impairment and often ataxia. Most reported cases are sporadic but a family history of seizures may be present [Kimura et al., 2005].SMEI has been associated with a large number (> 150) of predominantly de novo mutations in SCN1A encoding the brain voltage-gated sodium channel NaV1. 1 [Meisler and Kearney, 2005; Mulley et al., 2005]. Approximately half of reported SCN1A alleles associated with SMEI cause protein truncation either by nonsense or frameshift mutation. Further, a large proportion of missense mutations studied in vitro confer a loss-of-function phenotype to the channel protein [Ohmori et al., 2006; Rhodes et al., 2004; Sugawara et al., 2003]. These findings suggest that haploinsufficiency is a plausible mechanism to explain the disease and this idea is consistent with the observations that mice heterozygous for either a null or truncated Scn1a allele exhibit a severe seizure phenotype [Ogiwara et al., 2007; Yu et al., 2006].
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影响因子:
5.6
作者:
Wolff, Markus;Casse-Perrot, Catherine;Dravet, Charlotte
通讯作者:
Dravet, Charlotte
影响因子:
1.7
作者:
Kimura, K;Sugawara, T;Segawa, M
通讯作者:
Segawa, M
影响因子:
2.2
作者:
Sugawara, T;Tsurubuchi, Y;Yamakawa, K
通讯作者:
Yamakawa, K
影响因子:
16.2
作者:
Lossin, C;Wang, DW;George, AL
通讯作者:
George, AL
影响因子:
5.6
作者:
Ohmori, Iori;Kahlig, Kristopher M.;George, Alfred L., Jr.
通讯作者:
George, Alfred L., Jr.