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Impaired GABAergic transmission and altered hippocampal synaptic plasticity in collybistin-deficient mice.

Papadopoulos, Theofilos ; Korte, Martin ; Eulenburg, Volker ; Kubota, Hisahiko ; Retiounskaia, Marina ; Harvey, Robert J. ; Harvey, Kirsten ; O'Sullivan, Gregory A. ; Laube, Bodo ; Hülsmann, Swen ; Geiger, Jörg R. P. ; Betz, Heinrich (2007)
Impaired GABAergic transmission and altered hippocampal synaptic plasticity in collybistin-deficient mice.
In: The EMBO journal, 26 (17)
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

Collybistin (Cb) is a brain-specific guanine nucleotide exchange factor that has been implicated in plasma membrane targeting of the postsynaptic scaffolding protein gephyrin found at glycinergic and GABAergic synapses. Here we show that Cb-deficient mice display a region-specific loss of postsynaptic gephyrin and GABA(A) receptor clusters in the hippocampus and the basolateral amygdala. Cb deficiency is accompanied by significant changes in hippocampal synaptic plasticity, due to reduced dendritic GABAergic inhibition. Long-term potentiation is enhanced, and long-term depression reduced, in Cb-deficient hippocampal slices. Consistent with the anatomical and electrophysiological findings, the animals show increased levels of anxiety and impaired spatial learning. Together, our data indicate that Cb is essential for gephyrin-dependent clustering of a specific set of GABA(A) receptors, but not required for glycine receptor postsynaptic localization.

Typ des Eintrags: Artikel
Erschienen: 2007
Autor(en): Papadopoulos, Theofilos ; Korte, Martin ; Eulenburg, Volker ; Kubota, Hisahiko ; Retiounskaia, Marina ; Harvey, Robert J. ; Harvey, Kirsten ; O'Sullivan, Gregory A. ; Laube, Bodo ; Hülsmann, Swen ; Geiger, Jörg R. P. ; Betz, Heinrich
Art des Eintrags: Bibliographie
Titel: Impaired GABAergic transmission and altered hippocampal synaptic plasticity in collybistin-deficient mice.
Sprache: Englisch
Publikationsjahr: 2007
Titel der Zeitschrift, Zeitung oder Schriftenreihe: The EMBO journal
Jahrgang/Volume einer Zeitschrift: 26
(Heft-)Nummer: 17
Kurzbeschreibung (Abstract):

Collybistin (Cb) is a brain-specific guanine nucleotide exchange factor that has been implicated in plasma membrane targeting of the postsynaptic scaffolding protein gephyrin found at glycinergic and GABAergic synapses. Here we show that Cb-deficient mice display a region-specific loss of postsynaptic gephyrin and GABA(A) receptor clusters in the hippocampus and the basolateral amygdala. Cb deficiency is accompanied by significant changes in hippocampal synaptic plasticity, due to reduced dendritic GABAergic inhibition. Long-term potentiation is enhanced, and long-term depression reduced, in Cb-deficient hippocampal slices. Consistent with the anatomical and electrophysiological findings, the animals show increased levels of anxiety and impaired spatial learning. Together, our data indicate that Cb is essential for gephyrin-dependent clustering of a specific set of GABA(A) receptors, but not required for glycine receptor postsynaptic localization.

Fachbereich(e)/-gebiet(e): 10 Fachbereich Biologie
10 Fachbereich Biologie > Neurophysiologie und neurosensorische Systeme
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Hinterlegungsdatum: 11 Apr 2011 09:24
Letzte Änderung: 05 Mär 2019 06:48
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