Self-organized blastoids from extended pluripotent stem(EPs)cells possess enormous potential for investigating postimplantation embryo development and related diseases.However,the limited ability of postimplantation d...Self-organized blastoids from extended pluripotent stem(EPs)cells possess enormous potential for investigating postimplantation embryo development and related diseases.However,the limited ability of postimplantation development of Eps-blastoids hinders its further application.In this study,single-cell transcriptomic analysis indicated that the“trophectoderm(TE)-like structure”of EPSblastoids was primarily composed of primitive endoderm(PrE)-related cells instead of TE-related cells.We further identified PrE-like cells in EPS cell culture that contribute to the blastoid formation with TE-like structure.Inhibition of PrE cell differentiation by inhibiting MEK signaling or knockout of Gata6 in EPS cells markedly suppressed EPS-blastoid formation.Furthermore,we demonstrated that blastocyst-like structures reconstituted by combining the EPs-derived bilineage embryo-like structure(BLEs)with either tetraploid embryos or tetraploid TE cells could implant normally and develop into live fetuses.In summary,our study reveals that TE improvement is critical for constructing a functional embryo using stem cells in vitro.展开更多
Stem cell-based embryo models present new opportunities to study early embryonic development.In a recent study,Kagawa et al.identified an approach to create human pluripotent stem cell-based blastoids that resemble th...Stem cell-based embryo models present new opportunities to study early embryonic development.In a recent study,Kagawa et al.identified an approach to create human pluripotent stem cell-based blastoids that resemble the human blastocysts.These blastoids efficiently generated analogs of the EPI,TE,PrE lineages with transcriptomes highly similar to those found in vivo.Furthermore,the formation of these lineages followed the same sequence and pace of blas-tocyst development,and was also dependent on the same pathways required for lineage specification.Finally,the blastoids were capable of attaching to stimulated endometrial cells to mimic the process of implantation.While more comprehensive analysis is needed to confirm its validity and usefulness,this new blastoid system presents the latest development in the attempt to model early human embryogenesis in vitro.展开更多
基金supported by the National Key R&D Program of China(Nos.2020YFA0112500 and 2021YFA1102900)the National Natural Science Foundation of China(Nos.31721003,81630035,82022027,31871448,32000418 and 31820103009)+2 种基金supported by the key project of the Science and Technology of Shanghai Municipality(Nos.19JC1415300 and 21JC1405500)the Shanghai municipal medical and health discipline construction projects(No.2017ZZ02015)the China Postdoctoral Science Foundation 2021M692437 and the Fundamental Research Funds for the Central Universities.
文摘Self-organized blastoids from extended pluripotent stem(EPs)cells possess enormous potential for investigating postimplantation embryo development and related diseases.However,the limited ability of postimplantation development of Eps-blastoids hinders its further application.In this study,single-cell transcriptomic analysis indicated that the“trophectoderm(TE)-like structure”of EPSblastoids was primarily composed of primitive endoderm(PrE)-related cells instead of TE-related cells.We further identified PrE-like cells in EPS cell culture that contribute to the blastoid formation with TE-like structure.Inhibition of PrE cell differentiation by inhibiting MEK signaling or knockout of Gata6 in EPS cells markedly suppressed EPS-blastoid formation.Furthermore,we demonstrated that blastocyst-like structures reconstituted by combining the EPs-derived bilineage embryo-like structure(BLEs)with either tetraploid embryos or tetraploid TE cells could implant normally and develop into live fetuses.In summary,our study reveals that TE improvement is critical for constructing a functional embryo using stem cells in vitro.
基金This work is supported by the Intramural Research Program of the NIH,National Institute of Environmental Health Sciences[Z01ES102745 to G.H.,in part].
文摘Stem cell-based embryo models present new opportunities to study early embryonic development.In a recent study,Kagawa et al.identified an approach to create human pluripotent stem cell-based blastoids that resemble the human blastocysts.These blastoids efficiently generated analogs of the EPI,TE,PrE lineages with transcriptomes highly similar to those found in vivo.Furthermore,the formation of these lineages followed the same sequence and pace of blas-tocyst development,and was also dependent on the same pathways required for lineage specification.Finally,the blastoids were capable of attaching to stimulated endometrial cells to mimic the process of implantation.While more comprehensive analysis is needed to confirm its validity and usefulness,this new blastoid system presents the latest development in the attempt to model early human embryogenesis in vitro.
