Project description:As part of a benchmarking study aiming to infer gene regulatory network models and transcription factor effects from time-series data, we took daily samples of pluripotent stem cells during in vitro differentiation to definitive endoderm.
Project description:We discovered a role for the transcription factor OTX2 in formation of mouse definitive endoderm (DE). We used CUT&RUN to map OTX2-bound genomic regions and identify OTX2-regulated genes during directed differentiation of EpiSCs to DE
Project description:Optimizing the efficiency of definitive endoderm differentiation is significant for the generation of diverse organ-like structures. In this study, we utilized saracatinib to enhance definitive endoderm differentiation in pluripotent stem cells. We found saracatinib significantly improved the definitive endoderm differentiation at low concentrations. To investigate the impact of 0.5 μM saracatinib on definitive endoderm differentiation of ESC H1 cells, we conducted RNA-seq analysis with differentiated cells with or without 0.5 μM saracatinib treatment.
Project description:This SuperSeries is composed of the following subset Series: GSE16678: MicroRNA expression data from differentiation of human Cyt49 ESCs into definitive endoderm in feeder-free conditions GSE16681: mRNA expression data from differentiation of human ESCs into definitive endoderm, Cyt49 on matrigel GSE16687: MicroRNA expression data from differentiation of human Cyt49 ESCs into definitive endoderm on MEF feeder layers GSE16689: MicroRNA expression data from differentiation of human H9 ESCs into definitive endoderm on MEF feeder layers Refer to individual Series
Project description:We discovered a role for the transcription factor OTX2 in formation of mouse definitive endoderm (DE). We determined the gene expression profiles during conversion of EpiSCs to DE using scRNA-seq. We used dTAG13 to deplete OTX2 at two timepoints of differentiation
Project description:The directed differentiation of induced pluripotent stem (iPS) and embryonic stem (ES) cells into definitive endoderm (DE) would allow the derivation of otherwise inaccessible progenitors for endodermal tissues. However, a global comparison of the relative equivalency of DE derived from iPS and ES populations has not been performed. Recent reports of molecular differences between iPS and ES cells have raised uncertainty as to whether iPS cells could generate autologous endodermal lineages in vitro. Here, we have shown that both mouse iPS and parental ES cells exhibited highly similar in vitro capacity to undergo directed differentiation into DE progenitors. With few exceptions, both cell types displayed similar surges in gene expression of specific master transcriptional regulators and global transcriptomes that define the developmental milestones of DE differentiation. Microarray analysis showed considerable overlap between the genetic programs of DE derived from ES/iPS cells in vitro and authentic DE from mouse embryos in vivo. Intriguingly, iPS cells exhibited aberrant silencing of imprinted genes known to participate in endoderm differentiation, yet retained a robust ability to differentiate into DE. Our results show that, despite some molecular differences, iPS cells can be efficiently differentiated into DE precursors, reinforcing their potential for development of cell-based therapies for diseased endodermal-derived tissues. Comparison of mouse ES cells, mouse iPS cells, and E8.25 Mouse embryos; in the undifferentiated state and definitive endoderm differentiated state. ckit+/Sox2dim =definitive endoderm (day 5 of differentiation in vitro); Sox2bright =undifferentiated ES or iPS cells (day 0 of differentiation); ENDM1+/Epcam+/SSlo=foregut endoderm sorted from mouse E8.25 embryos; Epcam+/ENDM1 negative =sorted comparison population from mouse E8.25 embryos.
Project description:Mouse is the pre-eminent model system for studying genetic regulation of embryonic development. Directed differentiation of pluripotent stem cells (PSCs) has emerged as a powerful complement to in vivo studies of development, allowing for examination of developmental mechanisms at the molecular and cellular level. However, the limited availability of high-quality protocols for directed differentiation of mouse PSCs into defined lineages and organoids has prevented the widespread application of mouse PSC directed differentiation models. Here, we examine the potential of mouse epiblast stem cells (EpiSCs) cultured in media containing Wnt pathway inhibitors (primed ground state conditions) as a starting point for directed differentiation. First, we systematically optimized conditions to generate definitive endoderm that are significantly faster and more efficient than current state-of-the-art protocols for mouse PSCs. Second, we developed a robust protocol for generation of forebrain-patterned organoids. These new models can complement and empower in vivo studies in the mouse and can inform human PSC-based studies of development, which cannot readily be compared to analogous stages in vivo.
Project description:Mouse is the pre-eminent model system for studying genetic regulation of embryonic development. Directed differentiation of pluripotent stem cells (PSCs) has emerged as a powerful complement to in vivo studies of development, allowing for examination of developmental mechanisms at the molecular and cellular level. However, the limited availability of high-quality protocols for directed differentiation of mouse PSCs into defined lineages and organoids has prevented the widespread application of mouse PSC directed differentiation models. Here, we examine the potential of mouse epiblast stem cells (EpiSCs) cultured in media containing Wnt pathway inhibitors (primed ground state conditions) as a starting point for directed differentiation. First, we systematically optimized conditions to generate definitive endoderm that are significantly faster and more efficient than current state-of-the-art protocols for mouse PSCs. Second, we developed a robust protocol for generation of forebrain-patterned organoids. These new models can complement and empower in vivo studies in the mouse and can inform human PSC-based studies of development, which cannot readily be compared to analogous stages in vivo.
Project description:hESCs can differentiate into the three primary embryonic lineages (endoderm, mesoderm, ectoderm) as well as extraembryonic tissues. Definitive endoderm (DE) is the first step into the pathway to endoderm derived tissues: pancreas, liver, gut, lung. We used microarrays to detail the changes in mRNA expression during the transition from pluripotent hESCs into definitive endoderm.