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  Analysis of Oct4-dependent transcriptional networks regulating self-renewal and pluripotency in human embryonic stem cells

Babaie, Y., Herwig, R., Greber, B., Brink, T. C., Wruck, W., Groth, D., et al. (2006). Analysis of Oct4-dependent transcriptional networks regulating self-renewal and pluripotency in human embryonic stem cells. Stem Cells, Stem Cells Express, Epub-Epub. doi:10.1634/stemcells.2006-0426.

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 Creators:
Babaie, Yasmin, Author
Herwig, Ralf1, Author              
Greber, Boris2, Author
Brink, Thore C.3, Author              
Wruck, Wasco2, Author
Groth, Detlef2, Author
Lehrach, Hans3, Author              
Burdon, Tom, Author
Adjaye, James4, Author              
Affiliations:
1Bioinformatics (Ralf Herwig), Dept. of Vertebrate Genomics (Head: Hans Lehrach), Max Planck Institute for Molecular Genetics, Max Planck Society, ou_1479648              
2Max Planck Society, ou_persistent13              
3Dept. of Vertebrate Genomics (Head: Hans Lehrach), Max Planck Institute for Molecular Genetics, Max Planck Society, ou_1433550              
4Molecular Embryology and Aging (James Adjaye), Dept. of Vertebrate Genomics (Head: Hans Lehrach), Max Planck Institute for Molecular Genetics, Max Planck Society, ou_1479654              

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Free keywords: Human embryonic stem cells; Inner cell mass; Trophoblast; Pluripotency; RNA interference; OCT4; CDX2 Microarrays
 Abstract: The POU domain transcription factor OCT4 is a key regulator of pluripotency in the early mammalian embryo and is highly expressed in the inner cell mass of the blastocyst. Consistent with its essential role in maintaining pluripotency, Oct4 expression is rapidly downregulated during formation of the trophoblast lineage. To enhance our understanding of the molecular basis of this differentiation event in humans, we used a functional genomics approach involving RNA interference-mediated suppression of OCT4 function in a human ESC line and analysis of the resulting transcriptional profiles to identify OCT4-dependent genes in human cells. We detected altered expression of >1,000 genes, including targets regulated directly by OCT4 either positively (NANOG, SOX2, REX1, LEFTB, LEFTA/EBAF DPPA4, THY1, and TDGF1) or negatively (CDX2, EOMES, BMP4, TBX18, Brachyury [T], DKK1, HLX1, GATA6, ID2, and DLX5), as well as targets for the OCT4-associated stem cell regulators SOX2 and NANOG. Our data set includes regulators of ACTIVIN, BMP, fibroblast growth factor, and WNT signaling. These pathways are implicated in regulating human ESC differentiation and therefore further validate the results of our analysis. In addition, we identified a number of differentially expressed genes that are involved in epigenetics, chromatin remodeling, apoptosis, and metabolism that may point to underlying molecular mechanisms that regulate pluripotency and trophoblast differentiation in humans. Significant concordance between this data set and previous comparisons between inner cell mass and trophectoderm in human embryos indicates that the study of human ESC differentiation in vitro represents a useful model of early embryonic differentiation in humans.

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Language(s): eng - English
 Dates: 2006-10-26
 Publication Status: Published in print
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 Identifiers: eDoc: 305656
DOI: 10.1634/stemcells.2006-0426
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Title: Stem Cells
Source Genre: Journal
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Pages: - Volume / Issue: Stem Cells Express Sequence Number: - Start / End Page: Epub - Epub Identifier: ISSN: 1066-5099