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10.1098/rstb.2013.0550 http://scihub22266oqcxt.onion/10.1098/rstb.2013.0550 C4216471!4216471 !25349457     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=25349457 &cmd=llinks): Failed to open stream: HTTP request failed! 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Differential response of epiblast stem cells to Nodal and Activin signalling: a paradigm of early endoderm development in the embryo |pdf=|usr=}}{{25349457 }} gab.com Text Differential response of epiblast stem cells to Nodal and Activin signalling: a paradigm of early endoderm development in the embryo JO: Philos Trans R Soc Lond B Biol Sci http://www.kidney.de/pget.php?&tw=1&pmid=25349457 #FOAvip Mouse epiblast stem cells (EpiSCs) display temporal differences in the upregulation of Mixl1 expression during the initial steps of in vitro differentiation, which can be correlated with their propensity for endoderm differentiation. EpiSCs that upregulated Mixl1 rapidly during differentiation responded robustly to both Activin A and Nodal in generating foregut endoderm and precursors of pancreatic and hepatic tissues. By contrast, EpiSCs that delayed Mixl1 upregulation responded less effectively to Nodal and showed an overall suboptimal outcome of directed differentiation. The enhancement in endoderm potency in Mixl1-early cells may be accounted for by a rapid exit from the progenitor state and the efficient response to the induction of differentiation by Nodal. EpiSCs that readily differentiate into the endoderm cells are marked by a distinctive expression fingerprint of transforming growth factor (TGF)-? signalling pathway genes and genes related to the endoderm lineage. Nodal appears to elicit responses that are associated with transition to a mesenchymal phenotype, whereas Activin A promotes gene expression associated with maintenance of an epithelial phenotype. We postulate that the formation of definitive endoderm (DE) in embryoid bodies follows a similar process to germ layer formation from the epiblast, requiring an initial de-epithelialization event and subsequent re-epithelialization. Our results show that priming EpiSCs with the appropriate form of TGF-? signalling at the formative phase of endoderm differentiation impacts on the further progression into mature DE-derived lineages, and that this is influenced by the initial characteristics of the cell population. Our study also highlights that Activin A, which is commonly used as an in vitro surrogate for Nodal in differentiation protocols, does not elicit the same downstream effects as Nodal, and therefore may not effectively mimic events that take place in the mouse embryo. Twit Text FOAVip Differential response of epiblast stem cells to Nodal and Activin signalling: a paradigm of early endoderm development in the embryo ????Philos Trans R Soc Lond B Biol Sci http://www.kidney.de/pget.php?&tw=1&pmid=25349457 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=25349457 #FOAvip English Wikipedia <ref>{{Cite pmid|25349457 }}</ref> Differential response of epiblast stem cells to Nodal and Activin signalling: a paradigm of early endoderm development in the embryo #MMPMID25349457 Kaufman-Francis K ; Goh HN ; Kojima Y ; Studdert JB ; Jones V ; Power MD ; Wilkie E ; Teber E ; Loebel DA ; Tam PP Philos Trans R Soc Lond B Biol Sci 2014[Dec]; 369 (1657 ): ä PMID25349457 show ga Mouse epiblast stem cells (EpiSCs) display temporal differences in the upregulation of Mixl1 expression during the initial steps of in vitro differentiation, which can be correlated with their propensity for endoderm differentiation. EpiSCs that upregulated Mixl1 rapidly during differentiation responded robustly to both Activin A and Nodal in generating foregut endoderm and precursors of pancreatic and hepatic tissues. By contrast, EpiSCs that delayed Mixl1 upregulation responded less effectively to Nodal and showed an overall suboptimal outcome of directed differentiation. The enhancement in endoderm potency in Mixl1-early cells may be accounted for by a rapid exit from the progenitor state and the efficient response to the induction of differentiation by Nodal. EpiSCs that readily differentiate into the endoderm cells are marked by a distinctive expression fingerprint of transforming growth factor (TGF)-? signalling pathway genes and genes related to the endoderm lineage. Nodal appears to elicit responses that are associated with transition to a mesenchymal phenotype, whereas Activin A promotes gene expression associated with maintenance of an epithelial phenotype. We postulate that the formation of definitive endoderm (DE) in embryoid bodies follows a similar process to germ layer formation from the epiblast, requiring an initial de-epithelialization event and subsequent re-epithelialization. Our results show that priming EpiSCs with the appropriate form of TGF-? signalling at the formative phase of endoderm differentiation impacts on the further progression into mature DE-derived lineages, and that this is influenced by the initial characteristics of the cell population. Our study also highlights that Activin A, which is commonly used as an in vitro surrogate for Nodal in differentiation protocols, does not elicit the same downstream effects as Nodal, and therefore may not effectively mimic events that take place in the mouse embryo. |Animals [MESH] |Cell Differentiation/*physiology [MESH] |Embryonic Stem Cells/*metabolism [MESH] |Endoderm/cytology/*embryology [MESH] |Gene Expression Regulation, Developmental/genetics/*physiology [MESH] |Germ Layers/cytology/*embryology [MESH] |Homeodomain Proteins/metabolism [MESH] |Inhibin-beta Subunits/*metabolism [MESH] |Mice [MESH] |Nodal Protein/*metabolism [MESH] |Signal Transduction/physiology [MESH]Differential response of epiblast stem cells to Nodal and Activin sign(epmc).pdf DeepDyve Pubget Overpricing