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• W2949469190 abstract "Abstract Neurodevelopmental disorder with involuntary movements (NEDIM, OMIM: 617493) is a severe, early onset neurological condition characterized by a delay in psychomotor development, hypotonia, and hyperkinetic involuntary movements. Heterozygous de novo mutations in the GNAO1 gene cause NEDIM. Gα o , the gene product of GNAO1, is the alpha subunit of G o , a member of the heterotrimeric G i/o family of G-proteins. G o is found abundantly throughout the brain but the pathophysiological mechanisms linking Gα o functions to clinical manifestations of GNAO1- related disorders are still poorly understood. One of the most common mutant alleles among the GNAO1 encephalopathies is the c.626G>A or p.Arg209His (R209H) mutation. We developed heterozygous knock-in Gnao1 +/ R209H mutant mice using CRISPR/Cas9 methodology to assess whether a mouse model could replicate aspects of the NEDIM clinical pattern. Mice carrying the R209H mutation exhibited increased locomotor activity and a modest gait abnormality at 8-12 weeks. In contrast to mice carrying other mutations in Gnao1 , the Gnao1 +/R209H mice did not show enhanced seizure susceptibility. Levels of protein expression in multiple brain regions were unchanged from WT mice but the nucleotide exchange rate of mutant R209H Gα o was 9 times faster than WT. The atypical neuroleptic risperidone has shown efficacy in a patient with the R209H mutation. It also alleviated the hyperlocomotion phenotype observed in our mouse model but suppressed locomotion in WT mice as well. In this study, we show that Gnao1 +/R209H mice mirror elements of the patient phenotype and respond to an approved pharmacological agent." @default.
• W2949469190 created "2019-06-27" @default.
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• W2949469190 date "2019-06-06" @default.
• W2949469190 modified "2023-09-27" @default.
• W2949469190 title "Mice with GNAO1 R209H Movement Disorder Variant Display Hyperlocomotion Alleviated by Risperidone" @default.
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• W2949469190 doi "https://doi.org/10.1101/662031" @default.
• W2949469190 hasPublicationYear "2019" @default.
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