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RNA sequencing data of Wild Type and Fmr1 KO hippocampal neuron

ABSTRACT: RNA sequencing data of Wild Type and Fmr1 KO hippocampal neuron

PROVIDER: PRJNA454880 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7108414_1.fastq.gz	Fastqsanger.gz
	SRR7108414_2.fastq.gz	Fastqsanger.gz
	SRR7108415_1.fastq.gz	Fastqsanger.gz
	SRR7108415_2.fastq.gz	Fastqsanger.gz
	SRR7108416_1.fastq.gz	Fastqsanger.gz

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RNA sequencing data of Wild Type and Fmr1 KO hippocampal neuron

Project description:Fragile X syndrome (FXS), caused by mutations in fragile X mental retardation 1 gene (FMR1), is a prevailing genetic disorder of intellectual disability and autism. Analysis of transcriptome outcome (differentially expressed genes between WT and Fmr1 KO hippocampal neuron) associated with FXS reveal promising value of gene signature-based computation in repurposing drugs for potential practical treatment.

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Project description:Fragile X syndrome (FXS) is the most common monogenetic cause of inherited intellectual disability and autism in humans. One of the well-characterized molecular phenotypes of Fmr1 KO mice, a model of FXS, is increased translation of synaptic proteins. Although this upregulation stabilizes in the adulthood, abnormalities during the critical period of plasticity have long-term effects on circuit formation and synaptic properties. Using high-resolution quantitative proteomics of synaptoneurosomes isolated from the adult, developed brains of Fmr1 KO mice, we show differential abundance of proteins regulating postsynaptic receptor activity of glutamatergic synapse. This work includes proteomic dataset that was acquired and analyzed to quantify changes in the abundance of proteins in synaptoneurosomes (basal state, unstimulated and in vitro NMDA-R stimulated) isolated from Fmr1 KO mice and their wild-type littermates.

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Multi-level profiling of the Fmr1 KO rat unveils altered behavioral traits along with aberrant glutamatergic function

Project description:Fragile X Syndrome (FXS) is the most common cause of inherited intellectual disabilities and the most prevalent monogenic cause of autism. Although the knockout (KO) of the Fmr1 gene homolog in mice is primarily used for elucidating the neurobiological substrate of FXS, there is limited association of the experimental data with the pathophysiological condition in humans. The use of Fmr1 KO rats offers additional translational validity in this regard. Therefore, we employed a multi-level approach to study the behavioral profile and the glutamatergic and GABAergic neurotransmission status in pathophysiology-associated brain structures of Fmr1 KO rats, including the recordings of evoked and spontaneous field potentials from hippocampal slices, paralleled with next-generation RNA sequencing (RNA-seq). We found that these rats exhibit hyperactivity and cognitive deficits, along with characteristic bidirectional glutamatergic and GABAergic alterations in the prefrontal cortex and the hippocampus. These results are coupled to affected excitability and local inhibitory processes in the hippocampus, along with a specific transcriptional profile, highlighting dysregulated hippocampal network activity in KO rats. Overall, our data provide novel insights concerning the biobehavioral profile of FmR1 KO rats and translationally upscales our understanding on pathophysiology and symptomatology of FXS syndrome.

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Project description:ene pleiotropy defines the capacity of a gene to impact multiple phenotypic characters. The Fragile X Mental Retardation 1 (FMR1) gene is a candidate for pleiotropy, as it controls protein synthesis through its product, the translational regulator FMRP. As FMR1 loss-of-function leads to neurodevelopmental defects and Fragile X Syndrome (FXS), intellectual disability and autism, FMR1 functions have been mostly studied in the brain. FMR1-deficiency could also have yet unexplored consequences in periphery and impact metabolism through translational repression in peripheral organs. We combined 1H NMR-based metabolic phenotyping and proteomics to reveal the pleiotropic metabolic effects associated with FMR1-deficiency in mouse and human. We demonstrate that Fmr1-deficiency in the mouse increases hepatic translation, improves glucose tolerance and insulin sensitivity and reduces adiposity, while enhancing -adrenergic driven lipolysis and utilization of lipid energetic substrates. Last, we provide converging evidences in FXS patients that the levels of glucose, insulin and free fatty acids are modified, suggesting that FMR1-deficiency also drives metabolic readjustments in human. As part of a larger study investigating the involvement of fmr in metabolic alteration in fmr1-KO mice, fmr1-KO mouse livers were analysed by MS.

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