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Expression data from directly induced neural stem cells

ABSTRACT: Induced pluripotent stem (iPS) cells give rise to neural stem cells, which are applicable for therapeutic transplantation in treatment of neural diseases. However, generation of neural stem cells from iPS cells requires a careful selection of safe iPS clones. We sought to determine whether direct induction of neural stem cells from partially reprogrammed somatic cells is able to generate safer cells rapidly. We have successfully established direct induction system from fibroblast to neural stem cells. To characterize these directly induced neural stem cells, Gene expression profiles were compared with iPS cell or ES cell-derived neurosphere. We used affymetrix microarrays to compare the global gene expression of neurospheres prepared several method. RNA extracted from neurospheres was hybridized to Affymetrix microarrays. The mouse strain used in this study except ES/iPS cells was C57BL/6.

ORGANISM(S): Mus musculus

SUBMITTER: Kenji Yoshida

PROVIDER: E-GEOD-31598 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Expression data from directly induced neural stem cells

Project description:Induced pluripotent stem (iPS) cells give rise to neural stem cells, which are applicable for therapeutic transplantation in treatment of neural diseases. However, generation of neural stem cells from iPS cells requires a careful selection of safe iPS clones. We sought to determine whether direct induction of neural stem cells from partially reprogrammed somatic cells is able to generate safer cells rapidly. We have successfully established direct induction system from fibroblast to neural stem cells. To characterize these directly induced neural stem cells, Gene expression profiles were compared with iPS cell or ES cell-derived neurosphere. We used affymetrix microarrays to compare the global gene expression of neurospheres prepared several method.

2012-04-01 | GSE31598 | GEO

Expression data from neural stem cells treated with endotherial progenitor-derived soluble protein

Project description:Endogenous neural stem cells reside in the mammalian brain during development and within special niche microenvironments during adulthood. We discovered that endothelial progenitor cell-secreted factors promote the self-renewal of adult mouse NSCs in vivo and identified this protein as ECF-L. We also analyzed molecular signalling networks caused by ECF-L in neural stem cells using global gene expression analysis. Neural stem cells were isolated and expanded from adult mouse brain. Neural stem cells were cultured in the presence or absence of ECF-L in the MHM medium. After the designed period of ECF-L treatment, cells were harvested and RNA was extacted, followed by DNA microarray analysis.

2015-04-01 | E-GEOD-57794 | biostudies-arrayexpress

Comparison between mouse ES/iPS derived neurosphere and mouse primary culture of neurospheres obtained from fetal mouse ganglionic eminence

Project description:Recent reports have emphasized the pitfalls of iPSC technology including the potential for immunogenicity of transplanted cells. It is serious safety-related concern for iPSC-based cell therapy. However, preclinical data supporting the safety and efficacy of iPSCs are also accumulating. To address the concern of immunogenicity of ESCs/iPSCs or ESCs/iPSCs-derived neurospheres, global gene expression profiles were compared between undifferentiated mouse ESCs (EB3 line), mouse iPSCs (38C2 line), and ESC/iPSC-derived neurosphere and mouse primary culture of neurosphere obtained from fetal mouse ganglionic eminence. Mouse adult sklin fibroblast was used as a control. We used affymetrix microarrays to compare the global gene expression of neurospheres prepared several origins. Keywords: Expression profiling by array RNA extracted from neurospheres was hybridized to Affymetrix microarrays.

2012-03-01 | E-GEOD-31725 | biostudies-arrayexpress

Quantitative profiling of axonal guidance proteins during the differentiation of human neurospheres

Project description:Axon guidance is required for the establishment of brain circuits. Whether much of the molecular basis of axon guidance is known from animal models, the molecular machinery coordinating axon growth and pathfinding in humans remains to be elucidated. The use of induced pluripotent stem cells (iPSC) from human donors has revolutionized in vitro studies of the human brain. iPSC can be differentiated into neuronal stem cells which can be used to generate neural tissue-like cultures, known as neurospheres, that reproduce, in many aspects, the cell types and molecules present in the brain. Here, we analyzed quantitative changes in the proteome of neurospheres during differentiation. Relative quantification was performed at early time points during differentiation using iTRAQ-based labeling and LC-MS/MS analysis. We identified 6438 proteins, from which 433 were downregulated and 479 were upregulated during differentiation. We show that human neurospheres have a molecular profile that correlates to the fetal brain. During differentiation, upregulated pathways are related to neuronal development and differentiation, cell adhesion and axonal guidance whereas cell proliferation pathways were downregulated. We developed a functional assay to check for neurite outgrowth in neurospheres and confirmed that neurite outgrowth potential is increased after 10 days of differentiation and is enhanced by increasing cyclic AMP levels. The proteins identified here represent a resource to monitor neurosphere differentiation and coupled to the neurite outgrowth assay can be used to functionally explore neurological disorders using human neurospheres as a model.

2021-02-25 | PXD024177 | Pride

Human neurospheres ZIKV infection

Project description:Zika virus (ZIKV) has been associated with microcephaly and other brain abnormalities; however, the molecular consequences of ZIKV to human brain development are still not fully understood. Here we describe alterations in human neurospheres derived from induced pluripotent stem (iPS) cells infected with the strain of Zika virus that is circulating in Brazil. Combining proteomics and mRNA transcriptional profiling, over 500 proteins and genes associated with the Brazilian ZIKV infection were found to be differentially expressed. These genes and proteins provide an interactome map, which indicates that ZIKV controls the expression of RNA processing bodies, miRNA biogenesis and splicing factors required for self-replication. It also suggests that impairments in the molecular pathways underpinning cell cycle and neuronal differentiation are caused by ZIKV. These results point to biological mechanisms implicated in brain malformations, which are important to further the understanding of ZIKV infection and can be exploited as therapeutic potential targets to mitigate it.

2018-08-29 | PXD010866 | Pride

ZIKV infection of human neurospheres

2018-10-27 | PXD004588 | Pride

Expression data from dexamethasone treated mouse embryonic neural progenitor/stem cells isolated from wild type C57Bl/6 or caveolin-1 knockout mice

Project description:Neurosphere cultures prepared from E14.5 mouse cerebral cortex at passage 3 were treated for 4 hours with 100 nM dexamethasone We used microarrays to detail the global program of dexamethasone regulated gene expression in embryonic neural progenitor/stem cells. Cerebral cortex was isolated from E14.5 mouse fetuses and cultured as neurospheres for 3 passages prior to treatment with 100 nM dexamethasone or ethanol vehicle for 4 hours.

2014-05-21 | E-GEOD-49804 | biostudies-arrayexpress

Global gene expression analysis in murine iPS cells derived with mouse and human Nanog orthologs

Project description:Nanog null neural stem (NS) cells were reprogrammed to naive pluripotency in 2i/LIF conditions with mouse (m) Nanog and human (h) Nanog. Global gene expression in resulting iPS cells was compared to embryonic stem (ES) cells and nanog null NS cells. Murine iPS cells derived with mouse nanog iPS and human nanog iPS and then compared to embryonic stem cells and nanog null neural stem cells (3 replicates each).

2011-10-23 | E-GEOD-32464 | biostudies-arrayexpress

Dll1 acts as a tumor suppressor in neural stem cells to induce an astroglial lineage-restricted glioblastoma

Project description:There is increasing evidence for tissue stem cells as potential source for cancers. However, the cellular and molecular mechanisms at the origin of this transformation remain elusive. Here we show that Delta-like1 (Dll1) mutation induces the oncogenic transformation of neural stem cell–derived neurospheres into oncogenic spheres capable of generating histological and molecular human glioblastoma (GBM)-like tumors upon subcutaneous and intracranial transplantations into nude mice. Serial transplantation assays suggest that Dll1 spheres tumorigenicity results from the oncogenic transformation of normal neural stem cell into GBM-producing stem cell. Compared differentiation of Dll1 vs. WT spheres shows the presence in Dll1 spheres of a subpopulation of cells which although fated to a glial lineage fail to differentiate terminally, in keeping with the astrocytic promoting function of Delta-Notch. This population of astrocyte progenitors proliferates actively and fails to down-regulate EGFR phosphorylation. These studies suggest that Dll1-induced tumorigenesis is restricted to the astrocytic lineage thereby providing a model for human GBM as well as an explanation for the duality of Notch signaling acting either as an oncogene or a tumor suppressor in stem/progenitor cells derived tumors, depending on the lineage commitment. Comparison between control (WT) and mutants (Dll1-3 and Dll1-5) cells was performed. Two biological replicates (n=3 each replicate) were used, and each replicate (n=3, total RNA pooled) was dye-swaped.

2011-09-23 | E-GEOD-32293 | biostudies-arrayexpress

Generation of CNS neural stem cells and PNS derivatives from neural crest derived peripheral stem cells [Dataset 1]

Project description:Neural crest-derived neural stem cells (NCSCs) from the embryonic PNS can be reprogrammed in neurosphere culture (NS) to rNCSCs that produce CNS progeny, including myelinating oligodendrocytes. Using global gene expression analysis we now demonstrate that rNCSCs completely lose their previous PNS characteristics and acquire the identity of neural stem cells derived from embryonic spinal cord (SCSCs). Reprogramming proceeds rapidly and results in a homogenous population of Olig2-, Sox3- and Lex-positive CNS stem cells. Low-level expression of pluripotency inducing genes Oct4, Nanog and Klf4 argues against a transient pluripotent state during reprogramming. The acquisition of CNS properties is prevented in the presence of BMP4 (BMP NCSCs) as shown by marker gene expression and the potential to produce PNS neurons and glia. In addition, genes characteristic for mesenchymal and perivascular progenitors are expressed, which suggests that BMP NCSCs are directed towards a pericyte progenitor/mesenchymal stem cell (MSC) fate. Adult NCSCs from mouse palate, an easily accessible source of adult NCSCs, display strikingly similar properties. They do not generate cells with CNS characteristics but lose the neural crest markers Sox10 and p75 and produce MSCs. These findings show that embryonic NCSCs acquire a full CNS identity in neurosphere culture. In contrast, MSCs are generated from adult pNCSCs and BMP NCSCs, which reveals that postmigratory NCSCs are a source for MSCs up to the adult stage. Affymetrix Mouse 430_2 arrays were used to compare the gene expression profiles of E12.5 mouse spinal cord-derived neurospheres (SCSCs) and E12.5 DRG-derived neurospheres, cultured in the absence (rNCSCs) or in the presence of BMP4 (BMP NCSCs).

2014-11-01 | E-GEOD-56999 | biostudies-arrayexpress

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