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Expression data of mESCs differentiated into Paraxial mesoderm

ABSTRACT: Stem cell-derived tissues have wide potential for modelling developmental and pathological processes as well as cell-based therapy. However, it has proven difficult to generate several key cell types in vitro, including skeletal muscle. In vertebrates, skeletal muscles derive during embryogenesis from the presomitic mesoderm (PSM). Using PSM development as a guide, we establish conditions for the differentiation of monolayer cultures of mouse embryonic stem (ES) cells into PSM-like cells without the introduction of transgenes or cell sorting. We differentiated mouse ESCs in serum-free medium supplemented with Rspo3 ( or as an alternative with Chir 9902) and the Bmp inhibitor LDN193189. In vivo, the PSM cells are first expressing Msgn1 (posterior PSM marker) and then mature to express Pax3 (anterior PSM marker). After 4 days of differentiation of mESCs, Msgn1-positive cells were FACS-sorted and their transcriptome analyzed. After 6 days of differentiation, Pax3-positive cells were sorted and their transcriptome analyzed.

ORGANISM(S): Mus musculus

PROVIDER: GSE71348 | GEO | 2015/08/03

SECONDARY ACCESSION(S): PRJNA291030

REPOSITORIES: GEO

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Expression data of mESCs differentiated into Paraxial mesoderm

Project description:Stem cell-derived tissues have wide potential for modelling developmental and pathological processes as well as cell-based therapy. However, it has proven difficult to generate several key cell types in vitro, including skeletal muscle. In vertebrates, skeletal muscles derive during embryogenesis from the presomitic mesoderm (PSM). Using PSM development as a guide, we establish conditions for the differentiation of monolayer cultures of mouse embryonic stem (ES) cells into PSM-like cells without the introduction of transgenes or cell sorting. We differentiated mouse ESCs in serum-free medium supplemented with Rspo3 ( or as an alternative with Chir 9902) and the Bmp inhibitor LDN193189. In vivo, the PSM cells are first expressing Msgn1 (posterior PSM marker) and then mature to express Pax3 (anterior PSM marker). After 4 days of differentiation of mESCs, Msgn1-positive cells were FACS-sorted and their transcriptome analyzed. After 6 days of differentiation, Pax3-positive cells were sorted and their transcriptome analyzed. Mouse ESCs differentiated for 0, 4 and 6 days in serum-free medium containing a Wnt activator, a BMP inhibitor and DMSO, to study paraxial mesoderm in vitro

2015-08-03 | E-GEOD-71348 | biostudies-arrayexpress

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2015-01-01 | E-GEOD-39614 | biostudies-arrayexpress

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Project description:Stem cell-derived tissues have wide potential for modelling developmental and pathological processes as well as cell-based therapy. However, it has proven difficult to generate several key cell types in vitro, including skeletal muscle. In vertebrates, skeletal muscles derive during embryogenesis from the presomitic mesoderm (PSM). Treatment of mouse ES cells with a combination of the secreted Wnt activator R-Spondin3 and the BMP inhibitor Noggin generated cells expressing the early PSM marker Mesogenin1 (Msgn1) with high efficiency. To confirm their identity, we mapped gene expression profiles at successive stages of PSM differentiation in vivo and showed that the differentiated ES cells closely corresponded to the posterior PSM domain that expresses Msgn1 and then with time in culture matured to acquire the profile of the anterior Pax3 domain. When grafted into injured adult muscle in vivo these Pax3-expressing-cells generated large numbers of muscle fibers. Our system therefore efficiently produces myogenic precursors in vitro by recapitulating stepwise early myogenic differentiation in vivo. These findings should advance the development of cellular therapies for muscle degenerative diseases. Pre Somitic Mesoderm (PSM) were dissected into 7 pieces in Stage E8.5 Mouse embryo. The experiment was designed to have biological triplicate in each pieces. The PSM is a symmetric structure, left and right area were obtained from one embryo, another set of dissection was obtained from another embryo.

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Project description:The transcriptional mechanisms driving lineage specification during development are still largely unknown as the interplay of multiple transcription factors makes it difficult to dissect these molecular events. Using a cell-based differentiation platform to probe transcription function, we investigated the role of the key paraxial mesoderm and skeletal myogenic commitment factors, Msgn1, Tbx6, Foxc1, Pax3, Paraxis, Meox1, Six1 and Myf5, in paraxial mesoderm and skeletal myogenesis. From this study, we define a genetic hierarchy, with Pax3 emerging as the gatekeeper between the presomitic mesoderm and the myogenic lineage. By assaying chromatin accessibility, genomic binding and transcription profiling in mesodermal cells from mouse and human Pax3-induced embryonic stem cells and Pax3-null E9.5 mouse embryos, we identified conserved Pax3 functions in the activation of the skeletal myogenic lineage through modulation of Hedgehog, Notch, and BMP signaling pathways. In addition, we demonstrate that Pax3 molecular function involves chromatin remodeling of its bound elements through an increase in chromatin accessibility and cooperation with Six4 and Tead2 factors. Together, our data provide the first integrated analysis of Pax3 function, demonstrating its ability to remodel chromatin in mesodermal cells from developing embryos and proving a mechanistic footing for the transcriptional hierarchy driving myogenesis.

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