Find models by
Find models for
Find models of
Electrical synapses (gap junctions)
SenseLab mailing list
ModelDB related resources
Computational neuroscience ecosystem
Models in a git repository
Sodium channel mutations causing generalized epilepsy with febrile seizures + (Barela et al. 2006)
Download zip file
Help downloading and running models
Versions on GitHub
A novel mutation, R859C, in the Nav1.1 sodium channel was identified in a 4-generation, 33-member Caucasian family with a clinical presentation consistent with GEFS+. The mutation neutralizes a positively charged arginine in the domain 2 S4 voltage sensor of the Nav1.1 channel ƒÑ subunit. When the mutation was placed in the rat Nav1.1 channel and expressed in Xenopus oocytes, the mutant channel displayed a positive shift in the voltage-dependence of sodium channel activation, slower recovery from slow inactivation, and lower levels of current compared to the wild-type channel. Computational analysis suggests that neurons expressing the mutant channel have higher thresholds for firing a single action potential and for firing multiple action potentials, along with decreased repetitive firing. Therefore, this mutation should lead to decreased neuronal excitability, in contrast to most previous GEFS+ sodium channel mutations that have changes predicted to increase neuronal firing.
Barela AJ, Waddy SP, Lickfett JG, Hunter J, Anido A, Helmers SL, Goldin AL, Escayg A (2006) An epilepsy mutation in the sodium channel SCN1A that decreases channel excitability.
Spampanato J, Aradi I, Soltesz I, Goldin AL (2004) Increased neuronal firing in computer simulations of sodium channel mutations that cause generalized epilepsy with febrile seizures plus.
(Click on a link to find other models with that property)
Neuron or other electrically excitable cell;
Lickfett, Jay ;
Goldin, Al [agoldin at uci.edu];
for information about:
Download the displayed file
load_file("nrngui.hoc") load_file("APthreshold.hoc") load_file("displaytraces.hoc")
Load Model View
Loading data, please wait...