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• W4210404233 abstract "Abstract Cyclin-dependent kinase-like 5 (CDKL5) deficiency disorder (CDD) is a devastating rare neurodevelopmental disease without a cure, caused by mutations of the serine/threonine kinase CDKL5 highly expressed in the forebrain. CDD is characterized by early-onset seizures, severe intellectual disabilities, autistic-like traits, sensorimotor and cortical visual impairments (CVI). The lack of an effective therapeutic strategy for CDD urgently demands the identification of novel druggable targets potentially relevant for CDD pathophysiology. To this aim, we studied metabotropic glutamate receptors 5 (mGluR5) for their important role in critical mechanisms involved in CDD, i.e.: synaptogenesis, dendritic spines formation/maturation and synaptic plasticity, and because mGluR5 function depends on the postsynaptic protein Homer1bc that is downregulated in the cerebral cortex of CDKL5 −/y mice. In this study, we reveal that CDKL5 loss tampers with (i) the strength of Homer1bc-mGluR5 binding, (ii) the synaptic localization of mGluR5 and (iii) the mGluR5-mediated enhancement of NMDA-induced neuronal responses. Importantly, we showed that the stimulation of mGluR5 activity by administering in mice specific positive-allosteric-modulators, i.e.: 3-Cyano-N-(1,3-diphenyl-1H-pyrazol-5-yl)benzamide (CDPPB) or RO6807794, corrected the synaptic, functional and behavioural defects shown by CDKL5 −/y mice. Notably, the cerebral cortex of 2 CDD patients show similar changes in the synaptic organization to mutant CDKL5 mice, including a reduced mGluR5 expression, suggesting that mGluR5 represent a promising therapeutic target for CDD patients." @default.
• W4210404233 created "2022-02-08" @default.
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• W4210404233 date "2022-01-28" @default.
• W4210404233 modified "2023-10-01" @default.
• W4210404233 title "mGluR5 PAMs rescue cortical and behavioural defects in a mouse model of CDKL5 deficiency disorder" @default.
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• W4210404233 doi "https://doi.org/10.1101/2022.01.28.478021" @default.
• W4210404233 hasPublicationYear "2022" @default.
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