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Mus musculus

ABSTRACT: Transcriptome profiling of Dmrta2 KO neural progenitor cells derived from mouse embryonic stem cells (mESCs)

PROVIDER: PRJNA356066 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR5071650_1.fastq.gz	Fastqsanger.gz
	SRR5071650_2.fastq.gz	Fastqsanger.gz
	SRR5071651_1.fastq.gz	Fastqsanger.gz
	SRR5071651_2.fastq.gz	Fastqsanger.gz
	SRR5071652_1.fastq.gz	Fastqsanger.gz

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Project description:DNA methylation is known to regulate cell differentiation and neuronal function in vivo. Here we examined whether deficiency of a de novo DNA methyltransferase, Dnmt3a, affects in vitro differentiation of mouse embryonic stem cells (mESCs) to neuronal and glial cell lineages. We found that Dnmt3a-/- neural stem cells (NSCs) derived from mESCs have globally reduced methylcytosine levels and precociously differentiates into astrocytes and oligodendrocytes, consistent with our previous findings in the more severely hypomethylated Dnmt1-/- NSCs. Moreover, Dnmt3a-/- NSC proliferation rate was significantly increased when compared to control. Thus, our work revealed a novel role for Dnmt3a in regulating both timing of neural cell differentiation and cell proliferation in NSCs. Dnmt3a KO vs. WT neural stem cells; 3 biological replicates of each.

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Project description:Comparison of genomic data from neural progenitor cells derived from mouse embryonic stem cells under different experimetnal conditions in vitro and invivo. We conducted genome-wide RNA sequencing of immunoprecipitated specific ribosome-associated mRNA using RiboTag methods from: (i) mouse embryonic stem cell (ESC), (ii) derived neural progenitor cells, (iii) differentiated neural progenitor cells (in vitro), (iv) grafted neural progenitor cells (recovered from different in vivo tissue enivornments - healthy spinal cord, spinal cord injury lesions) and (v) host astrocytes using GFAp-Cre RiboTag mice.

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FASN-dependent de novo lipogenesis is required for brain development

Project description:Fate and behaviour of neural progenitor cells is tightly regulated during mammalian brain development. Metabolic pathways, such as glycolysis and oxidative phosphorylation, that are required for supplying energy and providing molecular building blocks to generate cells, govern progenitor function. However, the role of de novo lipogenesis, which is the conversion of glucose into fatty acids through the multi-enzyme protein fatty acid synthase (FASN), for brain development remains unknown. Using Emx1Cre-mediated, tissue-specific deletion of Fasn in the mouse embryonic telencephalon, we show that loss of FASN causes severe microcephaly, largely due to altered polarity of apical, radial glia progenitors (APs) and reduced progenitor proliferation. Further, genetic deletion and pharmacological inhibition of FASN in human embryonic stem cell (ESC)-derived forebrain organoids identifies a conserved role of FASN-dependent lipogenesis for radial glia cell polarity and progenitor expansion in the developing human forebrain. Thus, our data establish a role of de novo lipogenesis for mouse and human brain development and identify a link between progenitor cell polarity and lipid metabolism.

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Project description:The inner cell mass of the mouse pre-implantation blastocyst is comprised of epiblast progenitor and primitive endoderm cells of which cognate embryonic (mESCs) or extra-embryonic (XEN) stem cell lines can be derived. Importantly, each stem cell type retains the defining properties and lineage restriction of their in vivo tissue of origin. Recently, we demonstrated that XEN-like cells arise within mESC cultures. This raises the possibility that mESCs can generate self-renewing XEN cells without the requirement for gene manipulation. We have developed a novel approach to convert mESCs to XEN cells (cXEN) using growth factors. We confirm that the down-regulation of the pluripotency transcription factor Nanog and the expression of primitive endoderm-associated genes Gata6, Gata4, Sox17 and Pdgfra are necessary for cXEN cell derivation. This approach highlights an important function for Fgf4 in cXEN cell derivation. Paracrine FGF-signalling compensates for the loss of endogenous Fgf4, which is necessary to exit mESC self-renewal, but not for XEN cell maintenance. Our cXEN protocol also reveals that distinct pluripotent stem cells respond uniquely to differentiation promoting signals. cXEN cells can be derived from mESCs cultured with Erk- and Gsk3-inhibitors (2i) and LIF, similarly to conventional mESCs. However, we find that epiblast stem cells (EpiSCs) derived from the post-implantation embryo are refractory to cXEN cell establishment, consistent with the hypothesis that EpiSCs represent a pluripotent state distinct from mESCs. In all, these findings suggest that the potential of mESCs includes the capacity to give rise to both extra-embryonic and embryonic lineages. A total of eight samples were analyzed. Three mouse embryonic stem cell (mESC) lines were used as a negative control, 2 embryo-derived extraembryonic endoderm (XEN) cell lines were used as a positive control, 3 converted XEN (cXEN) cells were used as the experiemental cell lines.

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