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Fxr1 regulates sleep and synaptic homeostasis.
Khlghatyan, Jivan; Evstratova, Alesya; Bozoyan, Lusine; Chamberland, Simon; Chatterjee, Dipashree; Marakhovskaia, Aleksandra; Soares Silva, Tiago; Toth, Katalin; Mongrain, Valerie; Beaulieu, Jean-Martin.
Afiliación
  • Khlghatyan J; Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON, Canada.
  • Evstratova A; Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Québec-City, QC, Canada.
  • Bozoyan L; Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON, Canada.
  • Chamberland S; Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON, Canada.
  • Chatterjee D; Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Québec-City, QC, Canada.
  • Marakhovskaia A; Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON, Canada.
  • Soares Silva T; Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON, Canada.
  • Toth K; Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON, Canada.
  • Mongrain V; Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada.
  • Beaulieu JM; Department of Neuroscience, Université de Montréal and Center for Advanced Research in Sleep Medicine, Hôpital du Sacré-Coeur de Montréal (CIUSSS-NIM), Montreal, QC, Canada.
EMBO J ; 39(21): e103864, 2020 11 02.
Article en En | MEDLINE | ID: mdl-32893934
The fragile X autosomal homolog 1 (Fxr1) is regulated by lithium and has been GWAS-associated with schizophrenia and insomnia. Homeostatic regulation of synaptic strength is essential for the maintenance of brain functions and involves both cell-autonomous and system-level processes such as sleep. We examined the contribution of Fxr1 to cell-autonomous homeostatic synaptic scaling and neuronal responses to sleep loss, using a combination of gene overexpression and Crispr/Cas9-mediated somatic knockouts to modulate gene expression. Our findings indicate that Fxr1 is downregulated during both scaling and sleep deprivation via a glycogen synthase kinase 3 beta (GSK3ß)-dependent mechanism. In both conditions, downregulation of Fxr1 is essential for the homeostatic modulation of surface AMPA receptors and synaptic strength. Preventing the downregulation of Fxr1 during sleep deprivation results in altered EEG signatures. Furthermore, sequencing of neuronal translatomes revealed the contribution of Fxr1 to changes induced by sleep deprivation. These findings uncover a role of Fxr1 as a shared signaling hub between cell-autonomous homeostatic plasticity and system-level responses to sleep loss, with potential implications for neuropsychiatric illnesses and treatments.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Sueño / Proteínas de Unión al ARN / Homeostasis Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Revista: EMBO J Año: 2020 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Sueño / Proteínas de Unión al ARN / Homeostasis Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Revista: EMBO J Año: 2020 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Reino Unido