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

ABSTRACT: 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.

ORGANISM(S): Mus musculus

PROVIDER: GSE108161 | GEO | 2017/12/16

SECONDARY ACCESSION(S): PRJNA422615

REPOSITORIES: GEO

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Comparison of gene expression signature between nascent Lhx6-GFP+ cells from mouse embryonic brain and differentiated Lhx6-GFP+ cells from ES cells (as well as comparing those of Lhx6-GFP+ and Lhx6-GFP- cells from ES cells)

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Sp9 regulates medial ganglionic eminence-derived cortical interneuron development

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Expression data from purified medial ganglionic eminence (MGE) interneurons, 3 biological replicates

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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