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Perturbed expression pattern of the immediate early gene Arc in the dentate gyrus of GluA1 C-terminal palmitoylation-deficient mice.
Itoh, Masayuki; Okuno, Hiroyuki; Yamada, Daisuke; Yamashita, Mariko; Abe, Manabu; Natsume, Rie; Kaizuka, Toshie; Sakimura, Kenji; Hoshino, Mikio; Mishina, Masayoshi; Wada, Keiji; Sekiguchi, Masayuki; Hayashi, Takashi.
Afiliación
  • Itoh M; Section of Cellular Biochemistry, Department of Biochemistry and Cellular Biology, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Kodaira, Japan.
  • Okuno H; Department of Biochemistry and Cellular Biology, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Kodaira, Japan.
  • Yamada D; Medical Innovation Center/SK Project, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
  • Yamashita M; Department of Biochemistry and Molecular Biology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.
  • Abe M; Department of Degenerative Neurological Diseases, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Kodaira, Japan.
  • Natsume R; Department of Biochemistry and Cellular Biology, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Kodaira, Japan.
  • Kaizuka T; Department of Cellular Neurobiology, Brain Research Institute, Niigata University, Niigata, Japan.
  • Sakimura K; Department of Cellular Neurobiology, Brain Research Institute, Niigata University, Niigata, Japan.
  • Hoshino M; Section of Cellular Biochemistry, Department of Biochemistry and Cellular Biology, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Kodaira, Japan.
  • Mishina M; Department of Biochemistry and Cellular Biology, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Kodaira, Japan.
  • Wada K; Department of Cellular Neurobiology, Brain Research Institute, Niigata University, Niigata, Japan.
  • Sekiguchi M; Department of Biochemistry and Cellular Biology, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Kodaira, Japan.
  • Hayashi T; Department of Molecular Neurobiology and Pharmacology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
Neuropsychopharmacol Rep ; 39(1): 61-66, 2019 03.
Article en En | MEDLINE | ID: mdl-30536651
BACKGROUND: AMPA receptors predominantly mediate fast excitatory synaptic transmission in the mammalian brain. Post-translational protein S-palmitoylation of AMPA receptor GluA subunits at their C-termini reversibly controls the receptors trafficking to and from excitatory glutamatergic synapses. Excitatory inputs to neurons induce the expression of immediate early genes (IEGs), including Arc, with particular spatial patterns. In the hippocampal dentate gyrus, Arc is mainly expressed in the upper (dorsal) blade at the basal state. GluA1 C-terminal palmitoylation-deficient (GluA1C811S) mice showed enhanced seizure susceptibility and disturbed synaptic plasticity without impaired gross anatomy or basal synaptic transmission. These mutant mice also exhibited an increased expression of IEG products, c-Fos and Arc proteins, in the hippocampus and cerebral cortex. In this report, we further analyzed excitability and Arc expression pattern in the dentate gyrus of GluA1C811S mice. METHODS AND RESULTS: Electrophysiological analysis of granule neurons to measure the evoked excitatory postsynaptic current/evoked inhibitory postsynaptic current ratio revealed that excitatory/inhibitory (E/I) balance was normal in GluA1C811S mice. In contrast, immunohistochemical staining showed an abnormal distribution of Arc-positive cells between upper and lower (ventral) blades of the dentate gyrus in these mutant mice. These data suggest that deficiency of GluA1 palmitoylation causes perturbed neuronal inputs from the entorhinal cortex to the dentate gyrus, which potentially underlies the excessive excitability in response to seizure-inducing stimulation. CONCLUSION: Our findings conclude that an appropriate regulation of Arc expression in the dentate gyrus, ensured by AMPA receptor palmitoylation, may be critical for stabilizing hippocampal neural circuits and may suppress excess excitation.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Receptores AMPA / Genes Inmediatos-Precoces / Giro Dentado / Mutación Missense / Proteínas del Citoesqueleto / Proteínas del Tejido Nervioso Límite: Animals Idioma: En Revista: Neuropsychopharmacol Rep Año: 2019 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Receptores AMPA / Genes Inmediatos-Precoces / Giro Dentado / Mutación Missense / Proteínas del Citoesqueleto / Proteínas del Tejido Nervioso Límite: Animals Idioma: En Revista: Neuropsychopharmacol Rep Año: 2019 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos