rKv1.2 overexpression in the central medial thalamic area decreases caffeine-induced arousal

Cazzin, C. and Piccoli, L. and Massagrande, M. and Garbati, N. and Michielin, F. and Knaus, H.-G. and Ring, Christopher J. and Morrison, A.D. and Merlo-Pich, E. and Rovo, Z. and Astori, S. and Luthi, A. and Corti, C. and Corsi, M. (2011) rKv1.2 overexpression in the central medial thalamic area decreases caffeine-induced arousal. Genes, Brain and Behavior, 10 (8). pp. 817-827. ISSN 1601-1848

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Abstract

The voltage-gated potassium channel Kv1.2 belongs to the shaker-related family and has recently been implicated in the control of sleep profile on the basis of clinical and experimental evidence in rodents. To further investigate whether increasing Kv1.2 activity would promote sleep occurrence in rats, we developed an adeno-associated viral vector that induces overexpression of rat Kv1.2 protein. The viral vector was first evaluated in vitro for its ability to overexpress rat Kv1.2 protein and to produce functional currents in infected U2OS cells. Next, the adeno-associated Kv1.2 vector was injected stereotaxically into the central medial thalamic area of rats and overexpression of Kv1.2 was showed by in situ hybridization, ex vivo electrophysiology and immunohistochemistry. Finally, the functional effect of Kv1.2 overexpression on sleep facilitation was investigated using telemetry system under normal conditions and following administration of the arousing agent caffeine, during the light phase. While no differences in sleep profile were observed between the control and the treated animals under normal conditions, a decrease in the pro-arousal effect of caffeine was seen only in the animals injected with the adeno-associated virus-Kv1.2 vector. Overall, our data further support a role of the Kv1.2 channel in the control of sleep profile, particularly under conditions of sleep disturbance.

Item Type: Article
Keywords (uncontrolled): Adeno-associated vector; caffeine; Kv1.2; shaker channels; sleep; thalamus
Research Areas: A. > School of Science and Technology > Natural Sciences
Item ID: 11216
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Depositing User: Devika Mohan
Date Deposited: 09 Jul 2013 07:48
Last Modified: 13 Oct 2016 14:27
URI: http://eprints.mdx.ac.uk/id/eprint/11216

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