Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA266288 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Since many years, we are interested in the regulation of the intraneuronal chloride concentration. We were the first group reporting a full knockout of the KCl-co-transporter KCC2, which dies immediately after birth due to respiratory failure. Notably, KCC2 loss-of-function mutations are associated with inherited febrile seizures, severe genetic generalized epilepsy and epilepsy of infancy with migrating focal seizures. Here, we used our floxed line to study the consequences of the disruption of KCC2 within parvalbumin-positive interneurons in mice. Remarkably, this leads to the disinhibition of PV-positive interneurons as evidenced by a decrease of E-S-Coupling and an increase in the sIPSC frequency. Nevertheless, these mice develop fatal epilepsy with progressive loss of parvalbumin-positive interneurons thus increasing network excitability.
2022-11-02 | E-MTAB-11147 | biostudies-arrayexpress
Project description:Transcriptomic changes in parvalbumin positive interneurons from cortex and striatum.
| PRJNA391288 | ENA
Project description:Purpose: To identify genes differentially expressed in parvalbumin-positive (PV) interneurons of the hippocampus in non-defetaed (CTRL), stress-susceptible and stress-resilient mice. Method: Translating Ribosome Affinity Purification (TRAP) to isolate RNA from PV+ cells, cDNA synthesis and next generation RNAseq using Illumina Nextseq 500 sequencer. Results: RNA-seq revealed 458 DEGs between non-defeated and resilient mice, 1976 DEGs in non-defeated and susceptible mice, and 3475 DEGs in resilient and susceptible mice.
2021-09-14 | GSE184027 | GEO
Project description:This experiment was designed to compare the transcriptomic differences between two parvalbumin (PV) interneuron population of the mouse brain. These two populations have the same embryological origin and share several neurochemical and electrophysiological properties, but differ in their ability to express the glial cell line-derived neurotrophic factor GDNF (negative in cortex and positive in striatum). Two different reporters for PV expressing cells were used: i) a constitutive tdTomato gene inserted in the Pvalb locus, and ii) a PV-Cre; tdTomato model in which fluorescent cells are PV cells expressing Cre recombinase. The comparative gene expression analysis between PV neurons captured from striatum and cortex allowed unraveling differential molecular characteristics of GDNF-synthesizing striatal PV interneurons and their potential role in endogenous GDNF modulation. The specific expression of several genes of interest in the striatal PV interneurons has been validated by other methods (real-time RT-PCR, in situ hibridization, immunohistochemistry).
2020-07-16 | GSE100300 | GEO
Project description:We developed an affinity purification approach to isolate tagged nuclei in mice (similar to INTACT; [Deal R.B. and Henikoff S. A simple method for gene expression and chromatin profiling of individual cell types within a tissue. Dev. Cell 18,1030-1040. (2010)]) and used it to characterize genome-wide patterns of transcription, DNA methylation, and chromatin accessibility in 3 major neuron classes of the neocortex (excitatory pyramidal neurons, parvalbumin (PV)-positive GABAergic interneurons, and vasoactive intestinal peptide (VIP)-positive GABAergic interneurons). By combining cell purification and integrative analysis, our findings relate the phenotypic and functional complexity of neocortical neurons to their underlying transcriptional and epigenetic diversity. RNA-seq, MethylC-seq, ATAC-seq, and ChIP-seq for histone modifications using INTACT-purified nuclei from the mouse neocortex
2015-06-17 | E-GEOD-63137 | biostudies-arrayexpress
Project description:People with schizophrenia show hyperactivity in the ventral hippocampus (vHipp) and we have previously demonstrated distinct behavioral roles for vHipp cell populations. Here, we test the hypothesis that parvalbumin (PV) and somatostatin (SST) interneurons differentially innervate and regulate hippocampal pyramidal neurons based on their projection target. First, we use eGRASP to show that PV-positive interneurons form a similar number of synaptic connections with pyramidal cells regardless of their projection target while SST-positive interneurons preferentially target nucleus accumbens (NAc) projections. To determine if these anatomical differences result in functional changes, we used in vivo opto-electrophysiology to show that SST cells also preferentially regulate the activity of NAc-projecting cells. These results suggest vHipp interneurons differentially regulate that vHipp neurons that project to the medial prefrontal cortex (mPFC) and NAc. Characterization of these cell populations may provide potential molecular targets for the treatment schizophrenia and other psychiatric disorders associated with vHipp dysfunction.
2023-11-09 | GSE244159 | GEO
Project description:Neuronal activity is regulated in a narrow permissive band for the proper operation of biological neural networks. Changes in synaptic connectivities and network processes during key cognitive activity such as learning might disturb this balance, eliciting compensatory mechanisms to maintain network function1–3. In the neocortex, excitatory pyramidal cells and inhibitory interneurons exhibit robust forms of stabilising plasticity. However, while neuronal plasticity has been thoroughly studied in pyramidal cells4–8, comparatively little is known about how interneurons adapt to ongoing changes in their activity. Here we uncover critical cellular and molecular mechanisms underlying homeostatic regulation of parvalbumin-expressing (PV+) interneurons activity in mouse neocortex. We found that changes in the activity of PV+ interneurons drive cell-autonomous, bi-directional compensatory adjustments of the number and strength of inhibitory synapses received by these cells, specifically from other PV+ interneurons. High-throughput profiling of ribosome-associated mRNAs revealed that increasing the activity of PV+ interneurons leads to the cell-autonomous upregulation of Vgf, a gene encoding multiple neuropeptides. Functional experiments conclusively point towards the role VGF in mediating activity-dependent scaling of inhibitory synapses in PV+ interneurons. Our findings reveal an instructive role for VGF in regulating the connectivity among PV+ interneurons in the adult neocortex.
2025-01-28 | GSE223038 | GEO
Project description:Schizophrenia is associated with dysfunction of the dorsolateral prefrontal cortex (DLPFC). This dysfunction is manifest as cognitive deficits that appear to arise from disturbances in gamma frequency oscillations. These oscillations are generated in DLPFC layer 3 via reciprocal connections between pyramidal cells and parvalbumin (PV)-containing interneurons. The density of cortical PV neurons is not altered in schizophrenia, but expression levels of several transcripts involved in PV cell function, including PV, are lower in the disease.
2018-07-01 | GSE93577 | GEO
Project description:One of the earliest pathophysiological perturbations in Alzheimer’s Disease (AD) may arise from dysfunction of fast-spiking parvalbumin (PV) interneurons (PV-INs). Defining early protein-level (proteomic) alterations in PV-INs can provide key biological and translationally relevant insights. Here, we use cell-type-specific in vivo biotinylation of proteins (CIBOP) coupled with mass spectrometry to obtain native-state proteomes of PV interneurons. PV-INs exhibited proteomic signatures of high metabolic, mitochondrial, and translational activity, with over-representation of causally linked AD genetic risk factors. Analyses of bulk brain proteomes indicated strong correlations between PV-IN proteins with cognitive decline in humans, and with progressive neuropathology in humans and mouse models of Aβ pathology. Furthermore, PV-IN-specific proteomes revealed unique signatures of increased mitochondrial and metabolic proteins, but decreased synaptic and mTOR signaling proteins in response to early Aβ pathology. PV-specific changes were not apparent in whole-brain proteomes. These findings showcase the first nativestate PV-IN proteomes in mammalian brain, revealing a molecular basis for their unique vulnerabilities in AD
2024-03-04 | PXD043963 | Pride
Project description:We developed an affinity purification approach to isolate tagged nuclei in mice (similar to INTACT; [Deal R.B. and Henikoff S. A simple method for gene expression and chromatin profiling of individual cell types within a tissue. Dev. Cell 18,1030-1040. (2010)]) and used it to characterize genome-wide patterns of transcription, DNA methylation, and chromatin accessibility in 3 major neuron classes of the neocortex (excitatory pyramidal neurons, parvalbumin (PV)-positive GABAergic interneurons, and vasoactive intestinal peptide (VIP)-positive GABAergic interneurons). By combining cell purification and integrative analysis, our findings relate the phenotypic and functional complexity of neocortical neurons to their underlying transcriptional and epigenetic diversity.
2015-06-17 | GSE63137 | GEO