Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 2 de 2
Filter
Add more filters










Database
Language
Publication year range
1.
Stem Cell Reports ; 19(5): 618-628, 2024 May 14.
Article in English | MEDLINE | ID: mdl-38579708

ABSTRACT

SOX2 is a transcription factor involved in the regulatory network maintaining the pluripotency of embryonic stem cells in culture as well as in early embryos. In addition, SOX2 plays a pivotal role in neural stem cell formation and neurogenesis. How SOX2 can serve both processes has remained elusive. Here, we identified a set of SOX2-dependent neural-associated enhancers required for neural lineage priming. They form a distinct subgroup (1,898) among 8,531 OCT4/SOX2/NANOG-bound enhancers characterized by enhanced SOX2 binding and chromatin accessibility. Activation of these enhancers is triggered by neural induction of wild-type cells or by default in Smad4-ablated cells resistant to mesoderm induction and is antagonized by mesodermal transcription factors via Sox2 repression. Our data provide mechanistic insight into the transition from the pluripotency state to the early neural fate and into the regulation of early neural versus mesodermal specification in embryonic stem cells and embryos.


Subject(s)
Enhancer Elements, Genetic , Mesoderm , Neural Stem Cells , SOXB1 Transcription Factors , SOXB1 Transcription Factors/metabolism , SOXB1 Transcription Factors/genetics , Animals , Mice , Neural Stem Cells/metabolism , Neural Stem Cells/cytology , Mesoderm/cytology , Mesoderm/metabolism , Neurogenesis , Gene Expression Regulation, Developmental , Octamer Transcription Factor-3/metabolism , Octamer Transcription Factor-3/genetics , Cell Differentiation/genetics , Nanog Homeobox Protein/metabolism , Nanog Homeobox Protein/genetics , Cell Lineage/genetics , Smad4 Protein/metabolism , Smad4 Protein/genetics , Embryonic Stem Cells/metabolism , Embryonic Stem Cells/cytology , Mouse Embryonic Stem Cells/metabolism , Mouse Embryonic Stem Cells/cytology , Chromatin/metabolism , Protein Binding
2.
Development ; 150(10)2023 05 15.
Article in English | MEDLINE | ID: mdl-37082965

ABSTRACT

Cardiac lineage specification in the mouse is controlled by TGFß and WNT signaling. From fly to fish, BMP has been identified as an indispensable heart inducer. A detailed analysis of the role of Bmp4 and its effectors Smad1/5, however, was still missing. We show that Bmp4 induces cardiac mesoderm formation in murine embryonic stem cells in vitro. Bmp4 first activates Wnt3 and upregulates Nodal. pSmad1/5 and the WNT effector Tcf3 form a complex, and together with pSmad2/3 activate mesoderm enhancers and Eomes. They then cooperate with Eomes to consolidate the expression of many mesoderm factors, including T. Eomes and T form a positive- feedback loop and open additional enhancers regulating early mesoderm genes, including the transcription factor Mesp1, establishing the cardiac mesoderm lineage. In parallel, the neural fate is suppressed. Our data confirm the pivotal role of Bmp4 in cardiac mesoderm formation in the mouse. We describe in detail the consecutive and cooperative actions of three signaling pathways, BMP, WNT and Nodal, and their effector transcription factors, during cardiac mesoderm specification.


Subject(s)
Heart , Transcription Factors , Mice , Animals , Cell Differentiation/genetics , Transcription Factors/metabolism , Mesoderm/metabolism , Transforming Growth Factor beta/metabolism , Wnt Signaling Pathway/genetics , Bone Morphogenetic Protein 4/metabolism
SELECTION OF CITATIONS
SEARCH DETAIL