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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Expression data from embryonic stem cells (ESCs) and ESC-like cells

ABSTRACT: The transplantation of ESCs into living recipients causes teratoma formation which accompanies with several biological reactions in both the transplanted cells and recipient. Co-injection of ESCs with somatic cells that influence donor-recipient homogeneity can affect transcriptional profile of transplanted ESCs. We investigated global gene expression of parental ESCs and ESC-like cells derived from teratomas which were formed by different injection conditions to find transcriptional differences according to donor-recipient homogeneity and somatic cell co-injection. Parental ESCs or teratoma-derived ESC-like cells from different treatments were retrieved for RNA extraction and hybridization on Affymetrix microarrays.

ORGANISM(S): Mus musculus

SUBMITTER: Jeong Mook Lim

PROVIDER: E-GEOD-58725 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Expression data from embryonic stem cells (ESCs) and ESC-like cells

Project description:The transplantation of ESCs into living recipients causes teratoma formation which accompanies with several biological reactions in both the transplanted cells and recipient. Co-injection of ESCs with somatic cells that influence donor-recipient homogeneity can affect transcriptional profile of transplanted ESCs. We investigated global gene expression of parental ESCs and ESC-like cells derived from teratomas which were formed by different injection conditions to find transcriptional differences according to donor-recipient homogeneity and somatic cell co-injection.

2014-06-23 | GSE58725 | GEO

Polycomb protein EED is required for selective silencing of pluripotency genes upon ESC differentiation

Project description:Eed (embryonic ectoderm development) is a core component of the Polycomb Repressive Complex 2 (PRC2) which catalyzes the methylation of histone H3 lysine 27 (H3K27). Trimethylated H3K27 (H3K27me3) can act as a signal for PRC1 recruitment in the process of gene silencing and chromatin condensation. Previous studies with Eed KO ESCs revealed a failure to down-regulate a limited list of pluripotency factors in differentiating ESCs. Our aim was to analyze the consequences of Eed KO for ESC differentiation. To this end we first analyzed ESC differentiation in the absence of Eed and employed in silico data to assess pluripotency gene expression and H3K27me3 patterns. We linked these data to expression analyses of wildtype and Eed KO ESCs. We observed that in wildtype ESCs a subset of pluripotency genes including Oct4, Nanog, Sox2 and Oct4 target genes progressively gain H3K27me3 during differentiation. These genes remain expressed in differentiating Eed KO ESCs. This suggests that the deregulation of a limited set of pluripotency factors impedes ESC differentiation. Global analyses of H3K27me3 and Oct4 ChIP-seq data indicate that in ESCs the binding of Oct4 to promoter regions is not a general predictor for PRC2-mediated silencing during differentiation. However, motif analyses suggest a binding of Oct4 together with Sox2 and Nanog at promoters of genes that are PRC2-dependently silenced during differentiation. In summary, our data further characterize Eed function in ESCs by showing that Eed/PRC2 is essential for the onset of ESC differentiation. RNAs obtained from undifferentiated (d0) wild type and Eed KO ESCs and from day 3 (d3) and day 7 (d7) respective Ebs were subjected to Affymetrix Mouse Gene 1.0 ST Array. 24 samples in total.

2014-08-28 | E-GEOD-49305 | biostudies-arrayexpress

Parthenogenetic stem cells for tissue-engineered heart repair

Project description:Uniparental parthenotes are considered an unwanted byproduct of in vitro fertilization. In utero parthenote development is severely compromised by defective organogenesis and in particular by defective cardiogenesis. Although developmentally compromised, apparently pluripotent stem cells can be derived from parthenogenetic blastocysts. Here we hypothesized that nonembryonic parthenogenetic stem cells (PSCs) can be directed toward the cardiac lineage and applied to tissue-engineered heart repair. We first confirmed similar fundamental properties in murine PSCs and embryonic stem cells (ESCs), despite notable differences in genetic (allelic variability) and epigenetic (differential imprinting) characteristics. Haploidentity of major histocompatibility complexes (MHCs) in PSCs is particularly attractive for allogeneic cell-based therapies. Accordingly, we confirmed acceptance of PSCs in MHC-matched allotransplantation. Cardiomyocyte derivation from PSCs and ESCs was equally effective. The use of cardiomyocyte-restricted GFP enabled cell sorting and documentation of advanced structural and functional maturation in vitro and in vivo. This included seamless electrical integration of PSC-derived cardiomyocytes into recipient myocardium. Finally, we enriched cardiomyocytes to facilitate engineering of force-generating myocardium and demonstrated the utility of this technique in enhancing regional myocardial function after myocardial infarction. Collectively, our data demonstrate pluripotency, with unrestricted cardiogenicity in PSCs, and introduce this unique cell type as an attractive source for tissue-engineered heart repair. 8 samples in total. Parthenogenetic stem cells (PSC): - PSC_1 - PSC_2 - PSC_3 Embryoid body (EB) assays of parthenogenetic stem cells: - EB_PSC_1 - EB_PSC_2 Embryonic stem cells (ESC): - ESC_1 - ESC_2 - ESC_3

2013-02-23 | E-GEOD-30868 | biostudies-arrayexpress

HP1? has distinct subnuclear localizations, chromatin binding features and functions in embryonic stem cells and differentiating cells [expression]

Project description:We used microarrays to identify the gene expression changes in Cbx1-/- (HP1beta) knockout embryonic stem cells (ESCs) and Cbx5-/- (HP1alpha) knockout ESCs compared to WT ESCs and in embryoid bodies (EBs) differentiated from those three ESC types. ESCs were grown and the pluripotent SSEA1-positive cells from all ESC types using MACS were sorted and harvested or sorted and differentiated into EBs. Total RNA from all samples was extracted.

2015-08-02 | E-GEOD-65121 | biostudies-arrayexpress

Polycomb-like 2 associates with PRC2 and is required for mouse embryonic stem cell

Project description:Polycomb group (PcG) proteins are highly conserved epigenetic transcriptional repressors important for the control of numerous developmental gene expression programs and have recently been implicated in the modulation of embryonic stem cell (ESC) identity. We identified the PcG protein PCL2 (polycomb-like 2) in a genome-wide screen for novel regulators of self-renewal and pluripotency and predicted that it would play an important role in mouse ESC fate determination. Using multiple biochemical strategies, we provide evidence that PCL2 is a novel Polycomb Repressive Complex 2 (PRC2)-associated protein in mouse ESCs. Knockdown of Pcl2 in ESCs resulted in heightened self-renewal characteristics, defects in differentiation and altered patterns of histone methylation. Through integration of global gene expression and promoter occupancy analyses of both PCL2 and PRC2 components EZH2 and SUZ12, we have predicted PCL2 target genes and formulated regulatory networks describing the role of PCL2 both in modulating transcription of ESC self-renewal genes in undifferentiated ESCs as well as developmental regulators during early commitment and differentiation. Cells were stably expressing Pcl2 shRNA or shRNA mismatch control sequences. Hybridizations of three biological replicates for both the control and Pcl2 shRNA clone were performed.

2010-02-22 | E-GEOD-16364 | biostudies-arrayexpress

Transcription profiling of mouse embryonic stem cells after 1, 3, and 5 days LIF differentiation, and 1 and 2 days RA differentiation to predict and test of novel networks regulating embryonic stem cell self-renewal and commitment

Project description:Stem cell fate is governed by the integration of intrinsic and extrinsic positive and negative signals upon inherent transcriptional networks. To identify novel embryonic stem cell (ESC) regulators and assemble transcriptional networks controlling ESC fate, we performed temporal expression microarray analyses of ESCs following the initiation of commitment and integrated these data with known genome-wide transcription factor binding. Effects of forced under- or over-expression of predicted novel regulators, defined as differentially expressed genes with potential binding sites for known regulators of pluripotency, demonstrated greater than 90% correspondence with predicted function, as assessed by functional and high content assays of self-renewal. We next assembled 43 theoretical transcriptional networks in ESCs, 82% (23 out of 28 tested) of which were supported by analysis of genome-wide expression in Oct4 knockdown cells. By using this integrative approach we have, for the first time, formulated novel networks describing gene repression of key developmental regulators in undifferentiated ESCs and successfully predicted the outcomes of genetic manipulation of these networks. Experiment Overall Design: 1, 3, and 5 days LIF differentiated ESCs, and 1 and 2 days RA differentiated ESCs

2008-06-15 | E-GEOD-7506 | biostudies-arrayexpress

Functional cooperativity between Myc and PI3K signaling for indefinite self-renewal property of embryonic stem cells

Project description:We explored the relationship between Myc activity and PI3K signaling in ESCs. Our data demonstrate that Myc and PI3K signaling function cooperatively for supporting pluripotent property of ESCs. Moreover, our data demonstrate that exposure of ESCs to 2i condition render both Myc and PI3K dispensable for preserving ESC status. Effect of PI3K inhibitor, LY4294002 on EBRTcH3 ESCs or their derivatives overexpressing c-Myc (wild-type or T58A mutant) was examined. Effect of LY4294002 on EBRTcH3 ESCs under 2i conditions was also examined. Furthermore, effect of Max expression ablation was compared between ESCs and those overexpressing p110 alpha.

2014-10-30 | E-GEOD-60344 | biostudies-arrayexpress

Expression data from control and Snai1 knockout embryonic stem cells (ESCs)

Project description:Snail1 is a master epithelial-mesenchymal trisition (EMT) factor but its role in ESC maintenance is unknown. We used microarrays to compare the global gene expression between control and Snai1 knockout ESCs. RNA extracted from control and Snai1 knockout ESCs were hybridizated on Affymetrix microarrays.

2013-12-10 | E-GEOD-53107 | biostudies-arrayexpress

Gene expression profiles in human ESCs and ESC-derived purified cardiomyocytes

Project description:Differences of metabolism-related gene expression profiles in human ESCs and ESC-derived purified cardiomyocytes were analyzed and successfully identified. Human ESCs and ESC-derived purified cardiomyocytes were used for this experiment.

2016-03-31 | E-GEOD-77518 | biostudies-arrayexpress

MS-based quantitative proteomic analysis of embryonic stem cells with normal and reduced expression of Rsl24d1.

Project description:Embryonic stem cell (ESC) fate decisions are regulated by a complex molecular circuitry that requires tight and coordinated gene expression regulations at multiple levels from chromatin organization to mRNA processing. Recently, ribosome biogenesis and translation have emerged as key pathways that efficiently control stem cell homeostasis. However, the molecular mechanisms underlying the regulation of these pathways remain largely unknown to date. Here, we analyzed the expression, in mouse ESCs, of over 300 genes involved in ribosome biogenesis and we identified RSL24D1 as the most differentially expressed between self-renewing and differentiated ESCs. RSL24D1 is highly expressed in multiple mouse pluripotent stem cell models and its expression profile is conserved in human ESCs. RSL24D1 is associated with nuclear pre-ribosomes and is required for the maturation and the synthesis of 60S subunits in mouse ESCs. Interestingly, RSL24D1 depletion significantly impairs global translation, particularly of key pluripotency factors, including POU5F1 and NANOG, as well as components of the polycomb repressive complex 2 (PRC2). Consistently, RSL24D1 is required for mouse ESC self-renewal and proliferation. Taken together, we show that RSL24D1-dependant ribosome biogenesis is required to both sustain the expression of pluripotent transcriptional programs and silence developmental programs, which concertedly dictate ESC homeostasis.

2023-01-10 | PXD030497 | Pride

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