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Deficiency of intellectual disability-related gene Brpf1 attenuated hippocampal excitatory neurotransmission and impaired learning and memory behavior

ABSTRACT: Deficiency of intellectual disability-related gene Brpf1 attenuated hippocampal excitatory neurotransmission and impaired learning and memory behavior

PROVIDER: PRJNA730708 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR14574924_1.fastq.gz	Fastqsanger.gz
	SRR14574924_2.fastq.gz	Fastqsanger.gz
	SRR14574925_1.fastq.gz	Fastqsanger.gz
	SRR14574925_2.fastq.gz	Fastqsanger.gz
	SRR14574926_1.fastq.gz	Fastqsanger.gz

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Deficiency of intellectual disability-related gene Brpf1 attenuated hippocampal excitatory neurotransmission and impaired learning and memory behavior

Project description:We hypothesized that mouse Brpf1 plays critical roles in the morphology and function of hippocampal neurons, and its deficiency leads to learning and memory deficits. To test this, we performed immunofluorescence, whole-cell patch clamp, mRNA-Seq on shBrpf1 infected primary cultured hippocampal neurons to study the effect of Brpf1 knockdown on neuronal morphology, electrophysiological characteristics and gene regulation. In addition, we performed stereotactic injection into adult mouse hippocampus to knockdown Brpf1 in vivo and examined the learning and memory ability by Morris Water Maze. We found that mild knockdown of Brpf1 reduced mEPSC frequency of cultured hippocampal neurons, before any significant changes of dendritic morphology showed. We also found that hippocampal knockdown of Brpf1 reduced the learning and memory ability of mice to some extent. Finally, mRNA-Seq analyses showed that genes related to learning, memory, movement and synaptic transmission (such as C1ql1, Gpr17, Htr1d, Glra1, Cxcl10, Grin2a) were dysregulated upon Brpf1 knockdown. Our results showed that Brpf1 mild knockdown attenuated hippocampal excitatory neurotransmission and reduced learning and memory ability, which helps explain the symptoms of patients with BRPF1 mutations.

2021-05-19 | GSE174600 | GEO

Hippocampus-specific loss of intellectual disability-related gene Brpf1 impaired spatial and contextual learning

Project description:To help explain the dominant symptom-intellectual disability found in those patients with BRPF1 mutations, we used a genetically modified mouse model and used several methods to study the effect caused by BRPF1 knockout. We then performed gene expression profiling analysis using data obtained from RNA-seq of two genotypes of mice.

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Hippocampus-specific loss of intellectual disability-related gene Brpf1 impaired spatial and contextual learning

Project description:Hippocampus-specific loss of intellectual disability-related gene Brpf1 impaired spatial and contextual learning

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NONO mutations cause syndromic intellectual disability and inhibitory synaptic defects

Project description:Identifying causes of sporadic intellectual disability remains a considerable medical challenge. Here, we demonstrate that null mutations in the NONO gene, a member of the Drosophila Behavior Human Splicing (DBHS) protein family, are a novel cause of X-linked syndromic intellectual disability. Comparing humans to Nono-deficient mice revealed related behavioral and craniofacial anomalies, as well as global transcriptional dysregulation. Nono-deficient mice also showed deregulation of a large number of synaptic transcripts, causing a disorganization of inhibitory synapses, with impaired postsynaptic scaffolding of gephyrin. Alteration of gephyrin clustering could be rescued by over-expression of Gabra2 in NONO-compromised neurons. These findings link NONO to intellectual disability and first highlight the key role of DBHS proteins in functional organization of GABAergic synapses.

2015-09-02 | E-MTAB-2895 | biostudies-arrayexpress

NONO mutations cause syndromic intellectual disability and inhibitory synaptic defects

2015-09-02 | E-MTAB-2894 | biostudies-arrayexpress

10 Intellectual Disability samples for clinically relevant CNV detection

Project description:10 patients with Intellectual Disability diagnosed with a clinically relevant copy number change, selected to assess the dection performance of alternative platforms.

2013-08-01 | GSE46060 | GEO

10 Intellectual Disability samples for clinically relevant CNV detection

Project description:10 patients with Intellectual Disability diagnosed with a clinically relevant copy number change, selected to assess the dection performance of alternative platforms. 10 Affymetrix arrays were performed according to the manufacturer's directions on DNA extracted from peripheral blood samples.

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Diagnostic Exome Sequencing in Persons with Severe Intellectual Disability.

Project description:Intellectual disability is a common condition that carries lifelong severe medical and developmental consequences. The causes of intellectual disability (ID) remain unknown for the majority of patients due to the extensive clinical and genetic heterogeneity of this disorder. De novo mutations may play an important role in ID as most individuals with ID present as isolated cases without family history and/or clear syndromic indication. In addition, the involvement of such mutations have recently been demonstrated in a small number of individuals with ID. Here we evaluate the diagnostic potential and role of de novo mutations in a cohort of 100 patients with ID of unknown cause using family-based exome sequencing. Single end short-read (50 bp) SOLiD 4 sequencing data for 300 individuals, constituting 100 patient-parent trios. For more details please read; http://www.nejm.org/doi/full/10.1056/NEJMoa1206524. Dataset is created by RUNMC (Radboud University, Nijmegen Medical Center), partner of Geuvadis consortium (http://www.geuvadis.org).

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brpf1 knockdown reduces inhibitory neurotransmission and regulates gene expression of GABAergic interneurons derived from MGE

Project description:Our research is to investigate the role of Brpf1 in the development and function of GABAergic interneurons. To test this, we used mouse primary in vitro cultured GABAergic interneurons derived from medial ganglionic eminence (MGE) and utilized AAV-shBrpf1 virus to knockdown Brpf1. We performed mRNA-seq on the total RNA extracted from the infected neurons .We found that most of the up-regulated genes after Brpf1 knockdown were involved in processes such as protein binding, gene negative transcription, ubiquitination, and inflammation by mRNA-seq. We found that many genes related to neuronal calcium, potassium ion transport and neurotransmitter release changed after Brpf1 was knockdown.Our results demonstrate the key role of Brpf1 in related gene expression of GABAergic interneurons, and provide new lights on the underlying neurobiological mechanisms of BRPF1 mutations that cause mental retardation in children or adolescents.

2021-02-23 | GSE157903 | GEO

Deficiency of intellectual disability-related gene Brpf1 reduced inhibitory neurotransmission in MGE-derived GABAergic interneurons.

Project description:Intellectual disability is closely related to impaired GABA neurotransmission. Brpf1 was specifically expressed in medial ganglionic eminence (MGE), a developmental niche of GABAergic interneurons, and patients with BRPF1 mutations showed intellectual disability. To test its role in the development and function of MGE-derived GABAergic interneurons, we performed immunofluorescence staining, whole-cell patch-clamp, MGE transplantation, and mRNA-Seq to understand its effect on neuronal differentiation, dendritic morphology, electrophysiology, migration, and gene regulation, using mouse MGE-derived GABAergic interneurons infected with AAV-shBrpf1. The results showed that Brpf1 knockdown had a decreasing trend, although not significant, on the differentiation of GABAergic interneurons into parvalbumin+ interneurons. Moreover, increased firing threshold, decreased number of evoked action potentials, and a reduced amplitude of miniature inhibitory postsynaptic currents were observed before any significant change of MAP2+ dendritic morphology and in vivo migration ability appeared. Finally, mRNA-Seq analysis revealed that genes related to neurodevelopment and synaptic transmission such as Map2k7 were dysregulated. Our results demonstrated a key role of Brpf1 in inhibitory neurotransmission and related gene expression of GABAergic interneurons.

| S-EPMC8496217 | biostudies-literature