Project description:Here we report a potent, acetyl-lysine competitive and cell active inhibitor, PFI-3, that tightly binds to the bromodomain present in BRG1/BRM and the fifth bromodomain in Polybromo (BAF180). The high specificity of PFI-3 was achieved based on a novel binding mode of a salicylic acid head group that led to the replacement of water molecules typically maintained in bromodomain inhibitor complexes. Embryonic stem cells exposure to PFI-3 led to deprivation of stemness and deregulated lineage specification. Furthermore, differentiation of trophoblast stem cells in the presence of PFI-3 was dramatically enhanced. TSC were treated with PF1-3 or control compound in stemness or differentiation conditions, 2 replicates were used for treatment in stemness and differentiation conditions together with 2 control replicates in stemness and one during differentiation; DFKZ genomics and proteomics
Project description:Trophoblast stem cells (TSC) global transcriptome in stemness conditions after treatment with Lsd1 inhibitor or induction of Lsd1 depletion [RNA-seq]
Project description:Elf5 is a transcription factor with pivotal roles in the trophoblast compartment where it reinforces a trophoblast stem cell (TSC)-specific transcriptional circuit. However, Elf5 is also present in differentiating trophoblast cells that have ceased to express other TSC genes such as Cdx2 and Eomes. In the current study we aimed to elucidate the context-dependent role of Elf5 at the interface between TSC self-renewal and onset of differentiation. We demonstrate that precise levels of Elf5 are critical for normal expansion of the TSC compartment and embryonic survival, as Elf5 overexpression triggers precocious trophoblast differentiation. Through integration of protein interactome, transcriptome and genome-wide chromatin immunoprecipitation data we reveal that this abundance-dependent function is mediated through a shift in preferred Elf5 binding partners; in TSCs, Elf5 interaction with Eomes recruits Tfap2c to triply occupied sites at TSC-specific genes driving their expression. By contrast, the Elf5 and Tfap2c interaction becomes predominant as their protein levels increase. This triggers binding to double and single occupancy sites that harbour the cognate Tfap2c motif, causing activation of the associated differentiation-promoting genes. These data place Elf5 at the centre of a stoichiometry-sensitive transcriptional network where it acts as molecular switch governing the balance between TSC proliferation and differentiation.
Project description:In this study we introduced Sox21 as a new regulator of trophoblast stem cell (TSC) differentiation. The transcriptome of different cell types were analyzed and compared to identify a TSC gene signature. In order to identify novel TSC specific genes, we performed genome-wide expression profiling of TSCs, embryonic stem cells, epiblast stem cells, and mouse embryo fibroblasts derived from mice of the same genetic background (129S1/SvImJ).
Project description:This dataset is part of a study that aims to compare in vivo human trophoblast differentiation into EVTs to different in vitro trophoblast organoids using single-cell and single-nuclei RNA sequencing. This specific dataset includes scRNA-seq and snRNA-seq data from trophoblast stem cells (TSCs). Trophoblast stem cell (TSC) lines BTS5 and BTS11 derived by Okae and colleagues were grown as described previously (Okae et al. 2018) together with EVT differentiation media. This study shows that the main regulatory programs mediating EVT invasion in vivo are preserved in in vitro models of EVT differentiation from primary trophoblast organoids and trophoblast stem cells. Data for primary trophoblast organoids is available under E-MTAB-12650.
Project description:Trophoblast stem cells (TSC) have recently been derived from human embryos, and early first trimester placenta; however, aside from ethical challenges, the unknown disease potential of these cells limits their scientific utility. We have previously established a BMP4-based two-step protocol for differentiation of primed human pluripotent stem cells (hPSC) into functional trophoblast; however, those trophoblast could not be maintained in a self-renewing TSC-like state. Here, we use the first step from this protocol, followed by a switch to a newly-developed TSC media, to derive bona-fide TSC. We show that these cells resemble placenta- and naïve hPSC-derived TSC, based on their transcriptome, as well as in vitro and in vivo differentiation potential. We conclude that primed hPSC can be used to generate functional TSC, through a simple protocol which can be applied to a widely-available set of existing hPSC, including induced pluripotent stem cells derived from patients with known birth outcomes.
Project description:Trophoblast stem cells (TSC) have recently been derived from human embryos, and early first trimester placenta; however, aside from ethical challenges, the unknown disease potential of these cells limits their scientific utility. We have previously established a BMP4-based two-step protocol for differentiation of primed human pluripotent stem cells (hPSC) into functional trophoblast; however, those trophoblast could not be maintained in a self-renewing TSC-like state. Here, we use the first step from this protocol, followed by a switch to a newly-developed TSC media, to derive bona-fide TSC. We show that these cells resemble placenta- and naïve hPSC-derived TSC, based on their transcriptome, as well as in vitro and in vivo differentiation potential. We conclude that primed hPSC can be used to generate functional TSC, through a simple protocol which can be applied to a widely-available set of existing hPSC, including induced pluripotent stem cells derived from patients with known birth outcomes.
Project description:In this study we introduced Sox21 as a new regulator of trophoblast stem cell (TSC) differentiation. The transcriptome of different cell types were analyzed and compared to identify a TSC gene signature.
Project description:This study aims to compare in vivo human trophoblast differentiation into EVTs to different in vitro trophoblast organoids using single-cell and single-nuclei RNA sequencing. The study includes two type of systems: human primary trophoblast organoids (PTO) and trophoblast stem cells (TSCs). Trophoblast stem cell (TSC) lines BTS5 and BTS11 derived by Okae and colleagues were grown as described previously (Okae et al. 2018) and together with EVT media. Primary trophoblast organoids (PTO) were grown and differentiated into EVT as previously described by Turco & Sheridan (Turco et al 2018; Sheridan et al 2020). This study shows that the main regulatory programs mediating EVT invasion in vivo are preserved in in vitro models of EVT differentiation from primary trophoblast organoids and trophoblast stem cells.
Project description:In this study we identified that Sirt1 is important for mouse trophoblast stem cell (TSC) differentiation. The transcriptome of wild-type and Sirt1-null TSC were analyzed to identify dysregulation of signaling pathways.
