Browse
Submit Data
Databases
API
Help

Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Genome-wide mapping of OCT4, NANOG and CTCF in human embryonic stem cells

ABSTRACT: Transcription factors and their specific interactions with targets are crucial in specifying gene expression programs. To gain insights into the transcriptional regulatory networks in embryonic stem cells, we used chromatin immunoprecipitation coupled to ultra-high-throughput DNA sequencing (ChIP-seq) to map the locations of OCT4, NANOG and CTCF. ChIP-enriched DNA from pooled ChIP samples were analyzed by Solexa sequencing.

ORGANISM(S): Homo sapiens

SUBMITTER: Justin Joseph Gnanakkan

PROVIDER: E-GEOD-20650 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Json Xml

Publications

Transposable elements have rewired the core regulatory network of human embryonic stem cells.

Kunarso Galih G Chia Na-Yu NY Jeyakani Justin J Hwang Catalina C Lu Xinyi X Chan Yun-Shen YS Ng Huck-Hui HH Bourque Guillaume G

Nature genetics 20100606 7

Detection of new genomic control elements is critical in understanding transcriptional regulatory networks in their entirety. We studied the genome-wide binding locations of three key regulatory proteins (POU5F1, also known as OCT4; NANOG; and CTCF) in human and mouse embryonic stem cells. In contrast to CTCF, we found that the binding profiles of OCT4 and NANOG are markedly different, with only approximately 5% of the regions being homologously occupied. We show that transposable elements contr ...[more]

PMID: 20526341

Similar Datasets

OCT4, NANOG and CTCF in human embryonic stem cells

Project description:This SuperSeries is composed of the following subset Series: GSE20650: Genome-wide mapping of OCT4, NANOG and CTCF in human embryonic stem cells GSE21135: OCT4 Knockdown in human embryonic stem cells Refer to individual Series

2010-04-04 | E-GEOD-21200 | biostudies-arrayexpress

Genome-wide mapping of PRDM14 binding sites in human embryonic stem cells

Project description:PRDM14 belongs to the PR (PRDI-BF1 and RIZ) domain proteins (PRDM) family which is a subclass of the SET domain proteins, a common domain found in histone modifying enzymes. PRDM14 has been previously implicated to regulate self-renewal of hESCs as knock-down of PRDM14 induced expression of differentiation marker genes and altered the cellular morphology. We showed that PRDM14 directly regulates the expression of key pluripotency gene POU5F1. Genome-wide location profiling experiments revealed that PRDM14 co-localized extensively with other key transcription factors such as OCT4, NANOG and SOX2. More importantly, in a gain-of-function assay, we showed that PRDM14 is able to enhance the efficiency of reprogramming of human fibroblasts in conjunction with OCT4, SOX2 and KLF4. Hence, PRDM14 exemplifies a key transcription factor that is required for the maintenance of human ESC identity and the reacquisition of pluripotency in human somatic cells. ChIP-seq of PRDM14 in human ESCs

2010-10-20 | E-GEOD-22767 | biostudies-arrayexpress

Nanog, Oct4 and Tet1 interplay in establishing pluripotency.

Project description:A few central transcription factors inside mouse embryonic stem (ES) cells and induced pluripotent stem (iPS) cells are believed to control the cells' pluripotency. Characterizations of pluripotent state were put forward on both transcription factor and epigenetic levels. Whereas core players have been identified, it is desirable to map out gene regulatory networks which govern the reprogramming of somatic cells as well as the early developmental decisions. Here we propose a multiple level model where the regulatory network of Oct4, Nanog and Tet1 includes positive feedback loops involving DNA-demethylation around the promoters of Oct4 and Tet1. We put forward a mechanistic understanding of the regulatory dynamics which account for i) Oct4 overexpression is sufficient to induce pluripotency in somatic cell types expressing the other Yamanaka reprogramming factors endogenously; ii) Tet1 can replace Oct4 in reprogramming cocktail; iii) Nanog is not necessary for reprogramming however its over-expression leads to enhanced self-renewal; iv) DNA methylation is the key to the regulation of pluripotency genes; v) Lif withdrawal leads to loss of pluripotency. Overall, our paper proposes a novel framework combining transcription regulation with DNA methylation modifications which, takes into account the multi-layer nature of regulatory mechanisms governing pluripotency acquisition through reprogramming.

| S-EPMC4857071 | biostudies-literature

OCT4/SOX2-independent Nanog autorepression modulates heterogeneous Nanog gene expression in mouse ES cells.

Project description:NANOG, OCT4 and SOX2 form the core network of transcription factors supporting embryonic stem (ES) cell self-renewal. While OCT4 and SOX2 expression is relatively uniform, ES cells fluctuate between states of high NANOG expression possessing high self-renewal efficiency, and low NANOG expression exhibiting increased differentiation propensity. NANOG, OCT4 and SOX2 are currently considered to activate transcription of each of the three genes, an architecture that cannot readily account for NANOG heterogeneity. Here, we examine the architecture of the Nanog-centred network using inducible NANOG gain- and loss-of-function approaches. Rather than activating itself, Nanog activity is autorepressive and OCT4/SOX2-independent. Moreover, the influence of Nanog on Oct4 and Sox2 expression is minimal. Using Nanog:GFP reporters, we show that Nanog autorepression is a major regulator of Nanog transcription switching. We conclude that the architecture of the pluripotency gene regulatory network encodes the capacity to generate reversible states of Nanog transcription via a Nanog-centred autorepressive loop. Therefore, cellular variability in self-renewal efficiency is an emergent property of the pluripotency gene regulatory network.

| S-EPMC3545296 | biostudies-literature

ChIP-Seq of OCT4, NANOG, p300 in 3iL Human Embryonic Stem Cells

Project description:Human embryonic stem cells (hESCs) are isolated from the inner cell mass of the blastocysts. The pluripotent properties of hESCs enable the derivation of cell-types or tissues of different lineages for potential applications such as therapeutics discovery and regenerative medicine. Even though hESCs are pluripotent, differences have been observed when compared to the native pluripotent epiblast cells of the blastocyst. We use a chemical approach (3iL: 3 small molecule inhibitor and cytokine) to induce an expression signature that more closely resembles native pluripotent cells. This experiment is the transcription factor binding data of the study.

2013-12-05 | E-MTAB-2044 | biostudies-arrayexpress

ChIP Seq of Oct4, Nanog, H3K27me3 in Oct4+/+ and Oct4 +/- mES cells

Project description:ChIP Seq of Oct4, Nanog, H3K27me3 in Oct4+/+ and Oct4 +/- mES cells

| PRJEB1833 | ENA

Mapping of transcription factor binding sites in mouse embryonic stem cells

Project description:Transcription factors and their specific interactions with targets are crucial in specifying gene expression programs. To gain insights into the transcriptional regulatory networks in embryonic stem cells, we use chromatin immunoprecipitation coupled to ultra-high-throughput DNA sequencing (ChIP-seq) to map the locations of thirteen sequence specific transcription factors (Nanog, Oct4, STAT3, Smad1, Sox2, Zfx, c-Myc, n-Myc, Klf4, Esrrb, Tcfcp2l1, E2f1 and CTCF) and two transcription regulators (p300 and Suz12). These factors are known to play different roles in ES cell biology as components of the LIF and BMP signaling pathways, self-renewal regulators and key reprogramming factors. Our study provides insights into the integration of the signaling pathways to the ES cell-specific transcription circuitries. Intriguingly, we find specific genomic regions extensively targeted by different transcription factors. Collectively, the comprehensive mapping of transcription factor binding sites identifies important features of the transcriptional regulatory networks that define ES cell identity. Keywords: Transcription factor binding sites in undifferentiated mouse embryonic stem cells ChIP-enriched DNA from pooled ChIP samples were analyzed by Solexa sequencing.

2008-06-12 | E-GEOD-11431 | biostudies-arrayexpress

OCT4/POU5F1 is required for NANOG expression in bovine blastocysts.

Project description:Mammalian preimplantation development involves two lineage specifications: first, the CDX2-expressing trophectoderm (TE) and a pluripotent inner cell mass (ICM) are separated during blastocyst formation. Second, the pluripotent epiblast (EPI; expressing NANOG) and the differentiated primitive endoderm (PrE; expressing GATA6) diverge within the ICM. Studies in mice revealed that OCT4/POU5F1 is at the center of a pluripotency regulatory network. To study the role of OCT4 in bovine preimplantation development, we generated OCT4 knockout (KO) fibroblasts by CRISPR-Cas9 and produced embryos by somatic cell nuclear transfer (SCNT). SCNT embryos from nontransfected fibroblasts and embryos produced by in vitro fertilization served as controls. In OCT4 KO morulae (day 5), ∼70% of the nuclei were OCT4 positive, indicating that maternal OCT4 mRNA partially maintains OCT4 protein expression during early development. In contrast, OCT4 KO blastocysts (day 7) lacked OCT4 protein entirely. CDX2 was detected only in TE cells; OCT4 is thus not required to suppress CDX2 in the ICM. Control blastocysts showed a typical salt-and-pepper distribution of NANOG- and GATA6-positive cells in the ICM. In contrast, NANOG was absent or very faint in the ICM of OCT4 KO blastocysts, and no cells expressing exclusively NANOG were observed. This mimics findings in OCT4-deficient human blastocysts but is in sharp contrast to Oct4-null mouse blastocysts, where NANOG persists and PrE development fails. Our study supports bovine embryogenesis as a model for early human development and exemplifies a general strategy for studying the roles of specific genes in embryos of domestic species.

| S-EPMC5856541 | biostudies-literature

SUMOylation represses Nanog expression via modulating transcription factors Oct4 and Sox2.

Project description:Nanog is a pivotal transcription factor in embryonic stem (ES) cells and is essential for maintaining the pluripotency and self-renewal of ES cells. SUMOylation has been proved to regulate several stem cell markers' function, such as Oct4 and Sox2. Nanog is strictly regulated by Oct4/Sox2 heterodimer. However, the direct effects of SUMOylation on Nanog expression remain unclear. In this study, we reported that SUMOylation repressed Nanog expression. Depletion of Sumo1 or its conjugating enzyme Ubc9 increased the expression of Nanog, while high SUMOylation reduced its expression. Interestingly, we found that SUMOylation of Oct4 and Sox2 regulated Nanog in an opposing manner. SUMOylation of Oct4 enhanced Nanog expression, while SUMOylated Sox2 inhibited its expression. Moreover, SUMOylation of Oct4 by Pias2 or Sox2 by Pias3 impaired the interaction between Oct4 and Sox2. Taken together, these results indicate that SUMOylation has a negative effect on Nanog expression and provides new insights into the mechanism of SUMO modification involved in ES cells regulation.

| S-EPMC3382131 | biostudies-literature

Effects of ectopic Nanog and Oct4 overexpression on mesenchymal stem cells.

Project description:Mesenchymal stem cells (MSCs) represent a source of pluripotent cells that are already in various phases of clinical application. However, the use of MSCs in tissue engineering has been hampered largely due to their limitations, including low proliferation, finite life span, and gradual loss of their stem cell properties during ex vivo expansion. Nanog and Oct4 are key transcription factors essential to the pluripotent and self-renewing phenotypes of undifferentiated embryonic stem cells (ESCs). To determine whether Nanog and Oct4 improve human bone marrow-MSC quality, we therefore established stable Nanog and Oct4 overexpressing MSCs using a lentiviral system and showed that this promoted cell proliferation and enhanced colony formation of MSCs. In differentiating MSCs, Nanog, and Oct4, overexpression had converse effects on adipogenesis of MSCs and Nanog overexpression slowed down adipogenesis, whereas Oct4 overexpression improved adipogenesis. Nanog and Oct4 overexpression both improved chondrogenesis. Microarray data showed many differences in transcriptional targets in undifferentiated MSCs overexpressing Nanog and Oct4. These results provide insight into the improvement of the stemness of MSCs by genetic modification with stemness-related genes.

| S-EPMC3190294 | biostudies-literature

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data