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Generation of human blastocyst-like structures from pluripotent stem cells.

ABSTRACT: Human blastocysts are comprised of the first three cell lineages of the embryo: trophectoderm, epiblast and primitive endoderm, all of which are essential for early development and organ formation. However, due to ethical concerns and restricted access to human blastocysts, a comprehensive understanding of early human embryogenesis is still lacking. To bridge this knowledge gap, a reliable model system that recapitulates early stages of human embryogenesis is needed. Here we developed a three-dimensional (3D), two-step induction protocol for generating blastocyst-like structures (EPS-blastoids) from human extended pluripotent stem (EPS) cells. Morphological and single-cell transcriptomic analyses revealed that EPS-blastoids contain key cell lineages and are transcriptionally similar to human blastocysts. Furthermore, EPS-blastoids are similar with human embryos that were cultured for 8 or 10 days in vitro, in terms of embryonic structures, cell lineages and transcriptomic profiles. In conclusion, we developed a scalable system to mimic human blastocyst development, which can potentially facilitate the study of early implantation failure that induced by developmental defects at early stage.

SUBMITTER: Fan Y

PROVIDER: S-EPMC8421367 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Generation of human blastocyst-like structures from pluripotent stem cells

Project description:Due to ethical concerns and restricted access to human blastocysts, we lack a comprehensive understanding of early human embryogenesis. A reliable model system that can recapitulate early stages of human embryogenesis would help solve this problem.Here we report a robust three-dimensional (3D), two-step induction protocol for generating blastocyst-like structures (EPS-blastoids) from human extended pluripotent stem (EPS) cells. Morphological and single-cell transcriptomic analyses revealed that EPS-blastoids contain key cell lineages and are transcriptionally similar to human blastocysts. Furthermore, EPS-blastoids also exhibited the developmental potential to undergo post-implantation morphogenesis in vitro to form structures with a cellular composition and transcriptome signature similar to human embryos that had been cultured in vitro for 8 or 10 days. In conclusion, human EPS-blastoids provide a robust new experimental platform for studying early developmental stages of the human embryo.

2021-09-08 | GSE158971 | GEO

Generation of human blastocyst-like structures from pluripotent stem cells

Project description:Human blastocysts are comprised of the first three cell lineages of the embryo: trophectoderm, epiblast, and primitive endoderm, all of which are essential for early development and organ formation1,2. However, due to ethical concerns and restricted access to human blastocysts, we lack a comprehensive understanding of early human embryogenesis. To bridge this knowledge gap, we need a reliable model system that recapitulates early stages of human embryogenesis. Here we report a ∼three-dimensional (3D), two-step induction protocol for generating blastocyst-like structures (EPS-blastoids) from human extended pluripotent stem (EPS) cells. Morphological and single-cell transcriptomic analyses revealed that EPS-blastoids contain key cell lineages and are transcriptionally similar to human blastocysts. Furthermore, EPS-blastoids also exhibited the developmental potential to undergo post-implantation morphogenesis in vitro to form structures with a cellular composition and transcriptome signature similar to human embryos that had been cultured in vitro for 8 or 10 days. In conclusion, human EPS-blastoids provide a new experimental platform for studying early developmental stages of the human embryo.

2021-05-08 | GSE174034 | GEO

Generation of Blastocyst-like Structures from Extended Pluripotent Stem Cells

Project description:A single mouse blastomere from until 8-cell embryo can generate an entire blastocyst. Whether blastomere-like extended pluripotent stem cells (EPS cells) retain a similar generative capacity remains unknown. Here, we established a 3D differentiation system that enabled the generation of blastocyst-like structures from EPS cells (EPS-blastoids) through lineage segregation and self-organization. EPS-blastoids resembled blastocysts in morphology and cell lineage allocation. EPS-blastoids formation recapitulated key morphogenetic events during preimplantation and early postimplantation development in vitro. Upon transfer, some EPS-blastoids underwent implantation, induced decidualization, and generated live, albeit disorganized, tissues in utero. Single cell and bulk RNA-sequencing analysis revealed that EPS-blastoids contained all three blastocyst cell lineages and shared transcriptional similarity with natural blastocysts. We also provide proof-of-concept that EPS-blastoids can be generated from somatic cells via cellular reprograming. EPS-blastoids provide a unique platform for studying early embryogenesis, and pave the way to generate viable synthetic embryos using cultured cells.

2019-08-03 | GSE135289 | GEO

Generation of human blastocyst-like structures from pluripotent stem cells

Project description:Generation of human blastocyst-like structures from pluripotent stem cells

| PRJNA667174 | ENA

Generation of human blastocyst-like structures from pluripotent stem cells

Project description:Generation of human blastocyst-like structures from pluripotent stem cells

| PRJEB44768 | ENA

Generation of human blastocyst-like structures from pluripotent stem cells

Project description:Generation of human blastocyst-like structures from pluripotent stem cells

| PRJNA727994 | ENA

Generation of functional lungs via conditional blastocyst complementation using pluripotent stem cells.

Project description:Millions of people worldwide with incurable end-stage lung disease die because of inadequate treatment options and limited availability of donor organs for lung transplantation1. Current bioengineering strategies to regenerate the lung have not been able to replicate its extraordinary cellular diversity and complex three-dimensional arrangement, which are indispensable for life-sustaining gas exchange2,3. Here we report the successful generation of functional lungs in mice through a conditional blastocyst complementation (CBC) approach that vacates a specific niche in chimeric hosts and allows for initiation of organogenesis by donor mouse pluripotent stem cells (PSCs). We show that wild-type donor PSCs rescued lung formation in genetically defective recipient mouse embryos unable to specify (due to Ctnnb1cnull mutation) or expand (due to Fgfr2cnull mutation) early respiratory endodermal progenitors. Rescued neonates survived into adulthood and had lungs functionally indistinguishable from those of wild-type littermates. Efficient chimera formation and lung complementation required newly developed culture conditions that maintained the developmental potential of the donor PSCs and were associated with global DNA hypomethylation and increased H4 histone acetylation. These results pave the way for the development of new strategies for generating lungs in large animals to enable modeling of human lung disease as well as cell-based therapeutic interventions4-6.

| S-EPMC9169232 | biostudies-literature

Targeted organ generation using Mixl1-inducible mouse pluripotent stem cells in blastocyst complementation.

Project description:Generation of functional organs from patients' own cells is one of the ultimate goals of regenerative medicine. As a novel approach to creation of organs from pluripotent stem cells (PSCs), we employed blastocyst complementation in organogenesis-disabled animals and successfully generated PSC-derived pancreas and kidneys. Blastocyst complementation, which exploits the capacity of PSCs to participate in forming chimeras, does not, however, exclude contribution of PSCs to the development of tissues-including neural cells or germ cells-other than those specifically targeted by disabling of organogenesis. This fact provokes ethical controversy if human PSCs are to be used. In this study, we demonstrated that forced expression of Mix-like protein 1 (encoded by Mixl1) can be used to guide contribution of mouse embryonic stem cells to endodermal organs after blastocyst injection. We then succeeded in applying this method to generate functional pancreas in pancreatogenesis-disabled Pdx1 knockout mice using a newly developed tetraploid-based organ-complementation method. These findings hold promise for targeted organ generation from patients' own PSCs in livestock animals.

| S-EPMC4291089 | biostudies-other

Generation of blastocyst-like structures from human embryonic stem cells

Project description:This SuperSeries is composed of the SubSeries listed below.

2021-01-24 | GSE150578 | GEO

Generation of tooth-like structures from integration-free human urine induced pluripotent stem cells.

Project description:BackgroundTooth is vital not only for a good smile, but also good health. Yet, we lose tooth regularly due to accidents or diseases. An ideal solution to this problem is to regenerate tooth with patients' own cells. Here we describe the generation of tooth-like structures from integration-free human urine induced pluripotent stem cells (ifhU-iPSCs).ResultsWe first differentiated ifhU-iPSCs to epithelial sheets, which were then recombined with E14.5 mouse dental mesenchymes. Tooth-like structures were recovered from these recombinants in 3 weeks with success rate up to 30% for 8 different iPSC lines, comparable to H1 hESC. We further detected that ifhU-iPSC derived epithelial sheets differentiated into enamel-secreting ameloblasts in the tooth-like structures, possessing physical properties such as elastic modulus and hardness found in the regular human tooth.ConclusionOur results demonstrate that ifhU-iPSCs can be used to regenerate patient specific dental tissues or even tooth for further drug screening or regenerative therapies.

| S-EPMC4230506 | biostudies-literature

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