Infantile Severe Myoclonic Epilepsy
|
0.900 |
GermlineCausalMutation
|
disease |
ORPHANET |
To investigate the contribution of SCN1A mutations to the etiology of SMEI, we examined nine additional SMEI patients.
|
12754708 |
2003 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
GermlineCausalMutation
|
disease |
ORPHANET |
Review of the literature indicates that recurrent mutations account for 25% of SCN1A mutations in severe myoclonic epilepsy of infancy, including six sites of deamination at CpG dinucleotides.
|
16458823 |
2006 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
GermlineCausalMutation
|
disease |
ORPHANET |
Because both GEFS+ and SMEI involve fever-associated seizures, we screened seven unrelated patients with SMEI for mutations in SCN1A.
|
11359211 |
2001 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
GermlineCausalMutation
|
disease |
ORPHANET |
The genetics of Dravet syndrome.
|
21463275 |
2011 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
GermlineCausalMutation
|
disease |
ORPHANET |
Dravet syndrome: a genetic epileptic disorder.
|
23093055 |
2012 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
AlteredExpression
|
disease |
BEFREE |
Zebrafish with a mutation in the SCN1A homologue recapitulate spontaneous seizure activity and mimic the convulsive behavioural movements observed in Dravet syndrome.
|
28073790 |
2017 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
AlteredExpression
|
disease |
BEFREE |
The present findings describe DS-related brain structure abnormalities probably linked to the expression of the SCN1A mutation.
|
25048308 |
2014 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
AlteredExpression
|
disease |
BEFREE |
Since SCN1A is expressed in the motor neuron initial segment, we explored whether motor neuron dysfunction could contribute to gait disturbance and orthopedic misalignment in patients with Dravet syndrome due to SCN1A mutations.
|
27316242 |
2016 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
AlteredExpression
|
disease |
BEFREE |
Dravet syndrome (DS) is a disease that is primarily caused by the inactivation of the SCN1A-encoded voltage-gated sodium channel alpha subunit (Nav1.1).
|
30529264 |
2019 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
AlteredExpression
|
disease |
BEFREE |
Thus, the high risk of SUDEP in DS may result from a predisposition to cardiac arrhythmias in addition to seizures, reflecting expression of SCN1A in heart and brain.
|
30146492 |
2018 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
Biomarker
|
disease |
BEFREE |
Rare variants of small effect size in neuronal excitability genes influence clinical outcome in Japanese cases of SCN1A truncation-positive Dravet syndrome.
|
28686619 |
2017 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
Biomarker
|
disease |
BEFREE |
A clinical and genetic (denovo mutation of a sodium channel, SCN1A) diagnosis of Dravet syndrome was made.
|
26803335 |
2016 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
Biomarker
|
disease |
BEFREE |
The induction of short repeated seizures, at the age of disease onset for Scn1a mouse models (P21), had no effect in WT mice, but transformed the mild/asymptomatic phenotype of Scn1a<sup>RH/+</sup> mice into a severe DS-like phenotype, including frequent spontaneous seizures and cognitive/behavioral deficits.
|
30659983 |
2019 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
Biomarker
|
disease |
BEFREE |
These findings demonstrate that electrophysiological data from mammalian expression systems can serve as useful disease biomarker when evaluating SCN1A variants, particularly in view of new and emerging treatment options in DS.
|
31782251 |
2019 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
Biomarker
|
disease |
BEFREE |
Our results indicate that reduced sodium currents in GABAergic inhibitory interneurons in Scn1a+/- heterozygotes may cause the hyperexcitability that leads to epilepsy in patients with SMEI.
|
16921370 |
2006 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
Biomarker
|
disease |
BEFREE |
We propose that delayed maturation of GABAergic signaling may contribute to epileptogenesis in SCN1B- and SCN1A-linked DS.
|
30996233 |
2019 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
Biomarker
|
disease |
BEFREE |
Our data provide evidence for a range of SCN1A functional abnormalities in SMEI, including gain-of-function defects that were not anticipated in this disorder.
|
15263074 |
2004 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
Biomarker
|
disease |
BEFREE |
SCN1A is the most clinically relevant epilepsy gene and is associated with generalized epilepsy and febrile seizure plus (GEFS+) and Dravet syndrome.
|
19292758 |
2009 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
Biomarker
|
disease |
CLINGEN |
81.25% (13/16) of SCN1A mutations were de novo and 68.8% (11/16) were novel in Dravet syndrome.
|
30185235 |
2018 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
Biomarker
|
disease |
MGD |
Mice with heterozygous deletion of Scn1a (Scn1a(+/-) ) model a number of Dravet syndrome features, including spontaneous seizures and premature lethality.
|
24152123 |
2014 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
Biomarker
|
disease |
BEFREE |
We developed a zebrafish model of DS using morpholino antisense oligomers (MOs) targeting scn1Lab, the zebrafish ortholog of SCN1A.
|
25965391 |
2015 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
Biomarker
|
disease |
MGD |
Dravet syndrome (DS) is a severe childhood-onset epilepsy commonly due to mutations of the sodium channel gene SCN1A.
|
29329111 |
2018 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
Biomarker
|
disease |
BEFREE |
We report on the use of the voltage-gated calcium channel blocker (Vg-CCB), verapamil, as an add-on anticonvulsant medication in two girls, 4 and 14 years of age, who were affected by severe myoclonic epilepsy in infancy (SMEI) or Dravet syndrome, a channelopathy caused by abnormalities in the voltage-gated sodium channel neuronal type alpha1 subunit (SCN1A) gene at 2q24.
|
19303743 |
2009 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
Biomarker
|
disease |
BEFREE |
In addition, a patient with DS had a partial SCN1A amplification of 5-6 copies.
|
19400878 |
2009 |
Infantile Severe Myoclonic Epilepsy
|
0.900 |
Biomarker
|
disease |
CTD_human |
N1417H-Scn1a mutant rats may, therefore, be useful for testing the efficacy of new AEDs against FS in GEFS+ and SMEI patients.
|
21480876 |
2011 |