Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Dissecting the cell autonomous and non-autonomous effects of DNMT1 deletion in cortical somatostatinergic interneurons

ABSTRACT: The development of cortical circuits, made up of excitatory neurons and inhibitory interneurons, is a fine-tuned and vital process during brain development. Aberrations affecting the establishment of these circuits are implicated in several neuropsychiatric and neurological disorders. While excitatory neurons originate in cortical proliferative zones, inhibitory interneurons migrate from the basal telencephalon into the cortex. This migration is regulated by intrinsic genetic programs and extrinsic cues. Here, we aimed to identify the role of the DNA methyltransferase 1 (DNMT1) in controlling the expression of key genes implicated in the development and migration of post-mitotic somatostatin-positive interneurons as well as its impact on the rest of the cortical population.

ORGANISM(S): Mus musculus

PROVIDER: GSE298336 | GEO | 2025/06/18

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Identifying the role of DNMT1 in gene expression regulation in somatostatinergic interneurons during embryonic corticogenesis

Project description:The establishment of neuronal circuits, made up of excitatory neurons and inhibitory interneurons, is a fine-tuned process during corticogenesis and is pivotal for a functional brain. Developmental aberrations affecting these circuits are implicated in several neuropsychiatric disorders. While excitatory neurons originate in cortical proliferative zones, inhibitory interneurons migrate from the basal telencephalon into the cortex. This migration is regulated by intrinsic genetic programs and extrinsic cues. Here, we aimed to identify the role of the DNA methyltransferase 1 (DNMT1) in controlling the expression of key genes implicated in mouse cortical interneuron development and the migration of somatostatin-expressing interneurons within the developing cortex.

2025-07-30 | GSE300332 | GEO

Identifying the role of DNMT1 in gene expression regulation in somatostatinergic interneurons during embryonic corticogenesis [RNA-Seq]

2025-06-18 | GSE276516 | GEO

Identifying the role of DNMT1 on methylation signatures in somatostatinergic interneurons during embryonic corticogenesis [EM-seq]

Project description:The establishment of neuronal circuits, made up of excitatory neurons and inhibitory interneurons, is an intricately regulated process during development and is vital for proper brain function. Its perturbations are increasingly implicated in several neuropsychiatric disorders. While excitatory neurons are born in proliferative zones of the cortex, cortical inhibitory interneurons are born in the basal telencephalon and migrate into the cortex. This process is regulated by intrinsic genetic programs as well as extrinsic cues. Here, we aimed to characterize the role of the DNA methyltransferase 1 (DNMT1) in controlling the methylation of key genes implicated in the development and the migration of somatostatin-expressing interneurons within the developing murine cortex.

2025-06-18 | GSE298865 | GEO

Neocortical layer 4 in adult mouse differs in major cell types and circuit organization between primary sensory areas

Project description:Layer 4 (L4) of mammalian neocortex plays a crucial role in cortical information processing, yet a complete census of its cell types and connectivity remains elusive. Using whole-cell recordings with morphological recovery, we identified one major excitatory and seven inhibitory types of neurons in L4 of adult mouse visual cortex (V1). Nearly all excitatory neurons were pyramidal and all somatostatin-positive (SOM+) non-fast-spiking interneurons were Martinotti cells. In contrast, in somatosensory cortex (S1), excitatory neurons were mostly stellate and SOM+ interneurons were non-Martinotti. These morphologically distinct SOM+ interneurons corresponded to different transcriptomic cell types and were differentially integrated into the local circuit with only S1 neurons receiving local excitatory input. We propose that cell type specific circuit motifs, such as the Martinotti/pyramidal and non-Martinotti/stellate pairs, are used across the cortex as building blocks to assemble cortical circuits.

2019-08-06 | GSE134378 | GEO

Expression profiling in cortical GABAergic neurons at neonate

Project description:During embryonic development, GABAergic interneurons, a main inhibitory component in the cerebral cortex, migrate tangentially from the ganglionic eminence (GE) to cerebral cortex. After reaching the cerebral cortex, they start to extend their neurites for constructing local neuronal circuits around the neonatal stage. Aberrations in migration or neurite outgrowth are implicated in neurological and psychiatric disorders such as epilepsy, schizophrenia and autism. Previous studies revealed that in the early phase of cortical development the neural population migrates tangentially from the GE in the telencephalon and several genes have been characterized as regulators of migration and specification of GABAergic interneurons. However, much less is known about the molecular mechanisms of GABAergic interneurons-specific maturation at later stages of development. Here, we performed genome-wide screening to identify genes related to the later stage by flow cytometry based-microarray (FACS-array) and identified 247 genes expressed in cortical GABAergic interneurons. Among them, Dgkg, a member of diacylglycerol kinase family, was further analyzed. Correlational analysis revealed that Dgkg is dominantly expressed in somatostatin (SST)-expressing GABAergic interneurons. The functional study of Dgkg using GE neurons indicated alteration in neurite outgrowth of GABAergic neurons. This study shows a new functional role for Dgkg in GABAergic interneurons as well as the identification of other candidate genes for their maturation.

2017-12-01 | GSE93295 | GEO

Group 2 innate lymphoid cells promote inhibitory synapse development and social behavior [snRNA-Seq]

Project description:The innate immune system shapes brain development and is implicated in neurodevelopmental diseases. It is critical to define the relevant immune cells and signals and their impact on brain circuits. Here we show that group 2 innate lymphoid cells (ILC2s) and their cytokine Interleukin-13 (IL-13) signal directly to inhibitory interneurons to increase inhibitory synapse density in the developing brain. ILC2s expanded and produced IL-13 in the developing brain meninges. Loss of ILC2s or IL-13 signaling to interneurons decreased inhibitory, but not excitatory, cortical synapses. Conversely, ILC2s and IL-13 were sufficient to increase inhibitory 30 synapses. Loss of this signaling pathway led to selective impairments in social interaction. These data define a type 2 neuroimmune circuit in early life that shapes inhibitory synapse development and behavior.

2024-11-01 | GSE270237 | GEO

Individual Human Cortical Progenitors Can Produce Excitatory and Inhibitory Neurons

Project description:The cerebral cortex is a cellularly-complex structure comprised of a rich diversity of neuronal and glial cell types. Cortical neurons can be broadly categorized into two classes—glutamatergic excitatory neurons and GABAergic inhibitory interneurons. Previous developmental studies in rodents have led to the prevailing model that while excitatory neurons are born from progenitors located in the cortex, cortical interneurons are born from a separate population of progenitors located outside of the developing cortex in the ganglionic eminences1-5. However, the developmental potential of human cortical progenitors has not been thoroughly explored. Here we show that in addition to excitatory neurons and glia, human cortical progenitors are also capable of producing GABAergic neurons with the transcriptional characteristics and morphologies of cortical interneurons. By developing a cellular barcoding tool called “ScRNAseq-compatible Tracer for Identifying Clonal Relationships” (STICR), we were able to perform clonal lineage tracing of 1912 primary human cortical progenitors from six specimens and capture both the transcriptional identities and clonal relationships of their resulting progeny. A subpopulation of cortically-born GABAergic neurons were transcriptionally similar to cortical interneurons born from the caudal ganglionic eminence and these cells were frequently related to excitatory neurons and glia. Thus, our results demonstrate that individual human cortical progenitors can generate both excitatory neurons and cortical interneurons, providing a new framework for understanding the origins of neuronal diversity in the human cortex.

2021-11-06 | GSE187875 | GEO

Role of Astrocytes in critical periods

Project description:Brain postnatal development is characterized by critical periods of experience dependent remodeling. Maturation of local circuits inhibitory neurons terminate this period of enhanced plasticity. Astroglial cells are known to influence excitatory and inhibitory synaptic transmission as well as network activity through active signaling mechanisms. Although these can be developmentally regulated, the role of astrocytes in the timing of post-natal critical period is unknown. Here we show in the visual cortex that astrocytes con-trol the maturation of inhibitory neurons and thereby closure of the critical period. We uncover a novel underlying pathway involving regulation of the extracellular matrix that allows interneurons maturation via astroglial connexin signaling. We find that timing of the critical period closure is controlled by a marked upregulation of the astroglial protein connexin 30 that inhibits expression of the matrix degrading enzyme MMP9 through the RhoA-GTPase pathway. Our results thus demonstrate that astrocytes not only influ-ence neuronal activity but are also key elements in the experience–dependent wiring of brain circuits. Therefore, astrocytes represent a new cellular partner to consider in our understanding of the post-natal shaping of neuronal activities, hence providing a new target to alleviate malfunctions associated to im-paired closure of the critical period and settling of synaptic circuits.

2022-05-12 | PXD020448 | Pride

Distinct molecular programs regulate synapse specificity in cortical inhibitory circuits

Project description:How neuronal connections are established and organized in functional networks determines brain function. In the mouse cerebral cortex, different classes of GABAergic interneurons exhibit specific connectivity patterns that underlie their ability to shape temporal dynamics and information processing. Much progress has been made parsing interneuron diversity, yet the molecular mechanisms by which interneuron subtype-specific connectivity motifs emerge remain unclear. Here we investigate transcriptional dynamics in different classes of interneurons during the formation of cortical inhibitory circuits. We found that whether the interneurons synapse with pyramidal neurons on their dendrites, soma, or axon initial segment is determined by synaptic molecules that are expressed in a subtype-specific manner. Thus cell-specific molecular programs that unfold during early postnatal development underlie the connectivity patterns of cortical interneurons.

2019-01-25 | GSE120161 | GEO

ChIP-seq investigating the influence of astrocytes on the epigenetic landscape of developing cortical neurons

Project description:Astrocytes are implicated in neuronal development, particularly excitatory synaptogenesis, but their genome-wide impact is unclear. Using cell-type specific ChIP-seq we show that cortical astrocytes induce widespread changes in developing cortical neurons in histone marks associated with active open chromatin and repressed/condensed chromatin. Rat cortical neurons were maintained in the presence or absence of mouse astrocytes, ChIP-seq performed, and mixed-species ChIP-seq reads sorted according to species.

2024-05-16 | E-MTAB-14081 | biostudies-arrayexpress

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data