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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Transcription profiling of human embryonic stem cells and their differentiated progeny grown in chemically defined conditions

ABSTRACT: Comparison of H9 human embryonic stem cells, grown in chemically defined and animal-product free conditions, with their differentiated progeny - mesendodermal progenitors arisen as the result of changes made to chemically defined hESC growth conditions. Contributes to a larger work on the use of chemically defined growth conditions to direct hESC differentiation.

ORGANISM(S): Homo sapiens

SUBMITTER: Matthew Trotter

PROVIDER: E-MEXP-930 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Early cell fate decisions of human embryonic stem cells and mouse epiblast stem cells are controlled by the same signalling pathways.

Vallier Ludovic L Touboul Thomas T Chng Zhenzhi Z Brimpari Minodora M Hannan Nicholas N Millan Enrique E Smithers Lucy E LE Trotter Matthew M Rugg-Gunn Peter P Weber Anne A Pedersen Roger A RA

PloS one 20090630 6

Human embryonic stem cells have unique value for regenerative medicine, as they are capable of differentiating into a broad variety of cell types. Therefore, defining the signalling pathways that control early cell fate decisions of pluripotent stem cells represents a major task. Moreover, modelling the early steps of embryonic development in vitro may provide the best approach to produce cell types with native properties. Here, we analysed the function of key developmental growth factors such a ...[more]

PMID: 19564924

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Project description:Human Embryonic Stem Cells (hESC) grown in chemically defined medium (CDM) supplemented with Activin and FGF were compared to hESCs grown for 48 hours in CDM supplemented with FGF2 and SB431542, an inhibitor of Activin/Nodal signalling. The objective of this experiment was to discover the identity of genes controlled by Activin/Nodal signalling in hESCs.<br><br>

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Project description:Understanding the molecular mechanisms controlling early cell fate decisions in mammals is a major objective towards the development of robust methods for the differentiation of human pluripotent stem cells into clinically relevant cell types. Here, we used human embryonic stem cells (hESCs) to study specification of definitive endoderm in vitro. Using a combination of whole genome expression and ChIP-seq analyses, we established a hierarchy of transcription factors regulating endoderm specification. Importantly, pluripotency factors, namely NANOG, OCT4 and SOX2 have an essential function in this network by actively directing differentiation. Indeed, these transcription factors control the expression of EOMES, which marks the onset of endoderm specification. In turn, EOMES interacts with SMAD2/3 to initiate the transcriptional network governing endoderm formation. Together, these results provide for the first time a comprehensive molecular model connecting the transition from pluripotency to endoderm specification during mammalian development. ChIP-Seq of Eomesodermin binding in human embyonic stem cells, differentiated towards an endodermal fate for 48h in chemically-defined culture media. Includes an input DNA control. Supplementary file GSE26097_README.txt contains descriptions of the raw data files and processed data files.

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