Click here to close Hello! We notice that you are using Internet Explorer, which is not supported by Xenbase and may cause the site to display incorrectly. We suggest using a current version of Chrome, FireFox, or Safari.
XB-ART-36595
J Neurosci 2007 Sep 19;2738:10128-42. doi: 10.1523/JNEUROSCI.3042-07.2007.
Show Gene links Show Anatomy links

Nicotine-induced dystonic arousal complex in a mouse line harboring a human autosomal-dominant nocturnal frontal lobe epilepsy mutation.

Teper Y , Whyte D , Cahir E , Lester HA , Grady SR , Marks MJ , Cohen BN , Fonck C , McClure-Begley T , McIntosh JM , Labarca C , Lawrence A , Chen F , Gantois I , Davies PJ , Petrou S , Murphy M , Waddington J , Horne MK , Berkovic SF , Drago J .


???displayArticle.abstract???
We generated a mouse line harboring an autosomal-dominant nocturnal frontal lobe epilepsy (ADNFLE) mutation: the alpha4 nicotinic receptor S248F knock-in strain. In this mouse, modest nicotine doses (1-2 mg/kg) elicit a novel behavior termed the dystonic arousal complex (DAC). The DAC includes stereotypical head movements, body jerking, and forelimb dystonia; these behaviors resemble some core features of ADNFLE. A marked Straub tail is an additional component of the DAC. Similar to attacks in ADNFLE, the DAC can be partially suppressed by the sodium channel blocker carbamazepine or by pre-exposure to a very low dose of nicotine (0.1 mg/kg). The DAC is centrally mediated, genetically highly penetrant, and, surprisingly, not associated with overt ictal electrical activity as assessed by (1) epidural or frontal lobe depth-electrode electroencephalography or (2) hippocampal c-fos-regulated gene expression. Heterozygous knock-in mice are partially protected from nicotine-induced seizures. The noncompetitive antagonist mecamylamine does not suppress the DAC, although it suppresses high-dose nicotine-induced wild-type-like seizures. Experiments on agonist-induced 86Rb+ and neurotransmitter efflux from synaptosomes and on alpha4S248Fbeta2 receptors expressed in oocytes confirm that the S248F mutation confers resistance to mecamylamine blockade. Genetic background, gender, and mutant gene expression levels modulate expression of the DAC phenotype in mice. The S248F mouse thus appears to provide a model for the paroxysmal dystonic element of ADNFLE semiology. Our model complements what is seen in other ADNFLE animal models. Together, these mice cover the spectrum of behavioral and electrographic events seen in the human condition.

???displayArticle.pubmedLink??? 17881519
???displayArticle.pmcLink??? PMC6672658
???displayArticle.link??? J Neurosci
???displayArticle.grants??? [+]

Species referenced: Xenopus
Genes referenced: chrna4 fbxw4 fos
GO keywords: sodium channel activity

???displayArticle.omims??? EPILEPSY, NOCTURNAL FRONTAL LOBE, 1; ENFL1
References [+] :
Aridon, Increased sensitivity of the neuronal nicotinic receptor alpha 2 subunit causes familial epilepsy with nocturnal wandering and ictal fear. 2006, Pubmed