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Behavioral Evidence for Cognitive Dysfunctions in the (BALB/cByJ-Kv1.1mceph/mceph) Mouse Model for Epilepsy

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DOI: 10.4236/jbbs.2011.14028    3,876 Downloads   7,878 Views   Citations

ABSTRACT

The epileptic mouse model BALB/cByJ-Kv1.1mceph/mceph (mceph/mceph) is homozygous for a spontaneous mutation truncating the Shaker-like voltage gated potassium channel, Kv1.1 (Kcna1). The mceph/mceph mice are asymptomatic at birth, but develop from 3 weeks of age epileptic seizures, overgrowth and neuronal hyperplasia of the hippocampus. Hippocampal cognitive function of the mice was examined by investigating emotional memory using the aversive Passive Avoidance (PA) task combined with studies of explorative behavior using the non-aversive Novel Cage test (NCT). The behavioural results were examined by multivariate analysis. Compared to wild type and heterozygous mice, the mceph/mceph mice displayed lower exploratory and safety assessment behavior in the NCT and impairment in PA retention 24 hours after training, indicating an impairment in cognitive functions. In conclusion, the epileptic mouse model BALB/cByJ-Kv1.1mceph/mceph, with chronic epilepsy related to potassium-channelopathy, display a behavioural phenotype characterized by impairments in emotional memory and defensive motivational responses probably related to hippocampal dysfunctions.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

S. Holst, E. Åberg, T. Eriksson, C. Lavebratt and S. Ögren, "Behavioral Evidence for Cognitive Dysfunctions in the (BALB/cByJ-Kv1.1mceph/mceph) Mouse Model for Epilepsy," Journal of Behavioral and Brain Science, Vol. 1 No. 4, 2011, pp. 210-228. doi: 10.4236/jbbs.2011.14028.

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