Pluripotent stem cell-derived model of the post-implantation human embryo

Bailey A. T. Weatherbee, Carlos W. Gantner, Lisa K. Iwamoto-Stohl, Riza M. Daza, Nobuhiko Hamazaki, Jay Shendure and Magdalena Zernicka-Goetz ()
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Bailey A. T. Weatherbee: University of Cambridge
Carlos W. Gantner: University of Cambridge
Lisa K. Iwamoto-Stohl: University of Cambridge
Riza M. Daza: University of Washington School of Medicine
Nobuhiko Hamazaki: University of Washington School of Medicine
Jay Shendure: University of Washington School of Medicine
Magdalena Zernicka-Goetz: University of Cambridge

Nature, 2023, vol. 622, issue 7983, 584-593

Abstract: Abstract The human embryo undergoes morphogenetic transformations following implantation into the uterus, but our knowledge of this crucial stage is limited by the inability to observe the embryo in vivo. Models of the embryo derived from stem cells are important tools for interrogating developmental events and tissue–tissue crosstalk during these stages1. Here we establish a model of the human post-implantation embryo, a human embryoid, comprising embryonic and extraembryonic tissues. We combine two types of extraembryonic-like cell generated by overexpression of transcription factors with wild-type embryonic stem cells and promote their self-organization into structures that mimic several aspects of the post-implantation human embryo. These self-organized aggregates contain a pluripotent epiblast-like domain surrounded by extraembryonic-like tissues. Our functional studies demonstrate that the epiblast-like domain robustly differentiates into amnion, extraembryonic mesenchyme and primordial germ cell-like cells in response to bone morphogenetic protein cues. In addition, we identify an inhibitory role for SOX17 in the specification of anterior hypoblast-like cells2. Modulation of the subpopulations in the hypoblast-like compartment demonstrates that extraembryonic-like cells influence epiblast-like domain differentiation, highlighting functional tissue–tissue crosstalk. In conclusion, we present a modular, tractable, integrated3 model of the human embryo that will enable us to probe key questions of human post-implantation development, a critical window during which substantial numbers of pregnancies fail.

Date: 2023
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DOI: 10.1038/s41586-023-06368-y

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