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Establishment of mouse primitive endoderm stem cell lines [scRNA-Seq II]

ABSTRACT: The mammalian blastocyst consists of three distinct cell types: epiblast, trophoblast (TB), and primitive endoderm (PrE). Although embryonic stem cells (ESCs) and trophoblast stem cells (TSCs) retain the functional properties of Epi and TB, the currently available extraembryonic endoderm cells (XENC) do not fully recapitulate the developmental potential of PrE. Here we report derivation of primitive endoderm stem cells (PrESCs) in mice. PrESCs express both PrE and pluripotency marker genes like founder PrE. These cells are efficiently incorporated into PrE upon blastocyst injection, generate functionally competent PrE-derived tissues, and support fetal development of PrE-depleted blastocysts in chimeras. Establishment of PrESCs therefore represents a significant step-forward in elucidating the mechanisms for PrE specification and subsequent pre- and post-implantation development.

ORGANISM(S): Mus musculus

PROVIDER: GSE185461 | GEO | 2021/12/31

REPOSITORIES: GEO

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Primitive endoderm stem cell lines in mice

Project description:A blastocyst consists of three distinctive cell types: epiblast (EPI), trophoblast (TB), and primitive endoderm (PrE). Stem cell lines representing EPI and TB (embryonic stem (ES) cells and trophoblast stem (TS) cells) have been derived and they contribute to epiblast derivatives and trophoblast derivatives of stem cell-blastocyst chimeras, respectively. Although derived from PrE, extraembryonic endoderm (XEN) cells contribute to only a limited part of parietal endoderm (PE) but rarely to other PrE derivatives. Here we describe the establishment of primitive endoderm stem (PrES) cell lines in mice. PrES cells were derived and maintained in a serum-free media containing CHIR99021, FGF4, heparin, and PDGF-AA. RNA-seq analysis revealed that the transcriptome of PrES cells is globaly different from XEN cells: PrES cells express not only endoderm markers (Dab2, Gata4, Gata6, Sox17, etc.), but also pluripotent markers (Pou5f1, Cdh1, Nanog, Zfp42, etc.), and resembles in vivo founder PrE. PrES cells were rapidly and efficiently incorporated into PrE after blastocyst injection and efficiently contributed to all PrE derivatives, including PE, VE (visceral endoderm), and MZE (marginal zone endoderm) in chimeras. Importantly, PrES cells rescued embryonic lethality of PrE-depleted blastocysts by complementing all PrE derivatives. PrES cells thus not only contribute to understanding of the mechanisms of PrE specification but also provide a critical resource for artificial embryo reconstitution by stem cells alone.

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Project description:The mammalian blastocyst consists of three distinct cell types: epiblast, trophoblast, and primitive endoderm (PrE). Although stem cell lines that retain functional properties of epiblasts or trophoblasts have been established, establishment of stem cell lines that fully retain developmental potential of PrE has long been awaited. Here we report derivation of primitive endoderm stem (PrES) cells, which are capable to give rise functional PrE derived tissues and support fetal development of PrE-depleted blastocysts in chimeras, in mice. ES (#1M), TS cell (#1F), PrES (#6-5), and XEN (#6-5) cells were dissociated to single cells by incubation with 0.05% trypsin-EDTA at 37 °C for 3 min. The cells were resuspended in DMEM (Thermo Fisher Scientific) with 10% FBS, 1 × glutamine-penicillin-streptomycin, 0.1mM β-ME. The cells were replated alone or in combinations of each at a concentration of 20 cells per microwell (1.3×103 cells/dish) on 60mm EZSPHERE® SP dishes (Iwaki) and were placed at 37 °C and 5% CO2 for 1 day or 3 days.

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The immune checkpoint molecule, B7-H4/VTCN1, guides differentiation and suppresses proinflammatory responses and MHC class I expression in an embryonic stem cell-derived model of primitive human trophoblast III

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BMP4 signalling directs primitive endoderm-derived XEN cells to an extraembryonic visceral endoderm identity

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The primitive endoderm supports lineage plasticity to enable regulative development [CUT&Tag]

Project description:Mammalian blastocyst formation involves the sequential specification of trophectoderm and the differentiation of inner cell mass into either epiblast or primitive endoderm. During this time, the embryo maintains a window of plasticity and able to redirect its cellular fate when challenged experimentally. In this context, we found that the primitive endoderm alone was capable of regenerating a complete blastocyst and continue normal postimplantation development. We identify an in vitro population similar to the early primitive endoderm in vivo that exhibits plasticity, forms three dimensional embryoid structures and exhibits multilineage competence in chimera assays. Here, we find OCT4 as the main player in collaborating with endodermal transcription factors to maintain pluripotent enhancers in a state that is primed for activation mediated by JAK/STAT signalling. Our observations support the notion that transcription factor persistence underlies plasticity in regulative development and highlights the importance of primitive endoderm in perturbed development.

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