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Mus musculus

ABSTRACT: Sp9 regulates medial ganglionic eminence-derived cortical interneuron development

PROVIDER: PRJNA387134 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR5574921_1.fastq.gz	Fastqsanger.gz
	SRR5574921_2.fastq.gz	Fastqsanger.gz
	SRR5574922_1.fastq.gz	Fastqsanger.gz
	SRR5574922_2.fastq.gz	Fastqsanger.gz
	SRR5574923_1.fastq.gz	Fastqsanger.gz

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Sp9 regulates medial ganglionic eminence-derived cortical interneuron development

Project description:In the mammalian cortex, about 60% of GABAergic interneurons, mainly including parvalbumin-expressing (PV+) and somatostatin (SST+) interneurons are generated from the medial ganglionic eminence (MGE) in the subpallium and tangentially migrate to the cortex. Here we analyze the role of the Sp9 transcription factor in regulating the development of MGE-derived cortical interneurons. We show that SP9 is widely expressed in the MGE subventricular zone (SVZ) and in MGE-derived migrating interneurons. By analyzing Sp9 null and conditional mutant mice, we demonstrate that Sp9 promotes MGE progenitor proliferation in the SVZ and is required for the normal patterning of tangential migration and the laminar distribution of MGE-derived cortical GABAergic interneurons. Loss of Sp9 function results in a ~50% reduction of MGE-derived cortical interneurons, an ectopic aggregation of MGE-derived neurons in the embryonic ventral telencephalon, and an increased ratio of SST+/PV+ cortical interneurons. Finally, we provide evidence that Sp9 regulates MGE derived cortical interneuron development through promoting expression of the Lhx6 and Lhx8 transcription factors.

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ChIP-seq for TCF4 in human medial ganglionic eminence-like organoids (hMGEOs) derived from ihtc-03 cell line.

Project description:To depict the gene regulatory network of TCF4 in interneuron development, We performed chromatin immunoprecipitation-sequencing (ChIP seq) on human medial ganglionic eminence-like organoids (hMGEOs) to identify genome-wide TCF4 binding sites. This study provides compelling evidence to support the biological rationale linking TCF4 to the developing cortical interneuron.

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Project description:We hypothesized that the occurrence of IVH would reduce interneuron neurogenesis in the medial ganglionic eminence and diminish the population of parvalbumin+ and somatostatin+ cortical interneurons. Since Sonic Hedgehog promotes the production of cortical interneurons, we also postulated that the activation of Sonic Hedgehog signaling might restore neurogenesis, cortical interneuron population, and neurobehavioral function in premature newborns with IVH.

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Project description:We have used our protocol for generating cortical interneurons from human embryonic stem cells (hESCs) to study gene expression changes during this process, to identify regulatory networks critical to cortical interneuron development. Samples were collected at day 0 (hESCs), day 15 (ventral telencephalic patterned medial ganglionic eminence-like progenitors), day 35 (immature interneurons), and day 60 (mature interneurons).

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Next Generation Sequencing analysis of Lhx6 heterozygote and null forebrain transcriptomes at post natal day 15

Project description:Here we characterize the changes in the forebrain transcriptome resulting from the deletion of the transcription factor Lhx6, generated by RNA-seq technology with biologic replication. Lhx6 is an essential regulatory gene in the development of cortical interneurons generated in the medial ganglionic eminences of the embryonic brain. This data contains insights into gene networks important for the development of medial ganglionic eminence derived interneurons.

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Project description:During development, newborn interneurons migrate throughout the embryonic brain. Here, we provide evidence that these interneurons act in a paracrine fashion to regulate developmental oligodendrocyte formation. Specifically, we show that medial ganglionic eminence (MGE) interneurons secrete factors that promote genesis of oligodendrocytes from glially-biased cortical precursors in culture. Moreover, when MGE interneurons are genetically ablated in vivo prior to their migration, this causes a deficit in cortical oligodendrogenesis. Modeling of the interneuron-precursor paracrine interaction using transcriptome data identifies the cytokine fractalkine as responsible for the pro-oligodendrocyte effect in culture. This paracrine interaction is important in vivo, since knockdown of the fractalkine receptor CX3CR1 in embryonic cortical precursors, or constitutive knockout of CX3CR1 causes decreased numbers of oligodendrocyte progenitor cells (OPCs) and oligodendrocytes in the postnatal cortex. Thus, in addition to their role in regulating neuronal excitability, interneurons act in a paracrine fashion to promote the developmental genesis of oligodendrocytes. We used microarrays to generate a list of expressed genes in purified medial ganglionic eminence (MGE) interneurons

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Homo sapiens

Project description:Medial Ganglionic Eminence and Cortical Organoids Model Human Brain Development and Interneuron Migration [ATAC-seq]

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