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• W4385060007 abstract "Embryonic development is a complex process integrating cell fate decisions and morphogenesis in a spatiotemporally controlled manner. Previous studies with model organisms laid the foundation of our knowledge on post-implantation development; however, studying mammalian embryos at this stage is a difficult and laborious process. Early attempts to recapitulate mammalian development in vitro begun with embryoid bodies (EBs), in which aggregates of mouse embryonic stem cells (mESCs) were shown to differentiate into spatially arranged germ layers. A more revised version of EBs, gastruloids, improved the germ layer differentiation efficiency and demonstrated cell fate patterning on multiple axes. However, gastruloids lack anterior neural progenitors that give rise to brain tissues in the embryo. Here, we report a novel culture protocol to coax mESCs into post-implantation epiblast-like (EPI) aggregates in high throughput on bioengineered microwell arrays. We show that upon inhibition of the Wnt signaling pathway, EPI aggregates establish an extended axial patterning, leading to co-derivation of anterior neural progenitors and posterior tissues. Our approach is amenable to large-scale studies aimed at identifying novel regulators of gastrulation and anterior neural development that is currently out of reach with existing embryoid models. This work should contribute to the advancement of the nascent field of synthetic embryology, opening up exciting perspectives for various applications of pluripotent stem cells in disease modeling and tissue engineering. Key features A new gastruloid culture system to model post-implantation mouse embryonic development in vitro High-throughput formation of epiblast-like aggregates on hydrogel microwells Builds upon conventional gastruloid cultures and provides insight into the role of Wnt signaling for the formation of anterior neural tissues Graphical overview." @default.
• W4385060007 created "2023-07-23" @default.
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• W4385060007 date "2023-01-01" @default.
• W4385060007 modified "2023-09-27" @default.
• W4385060007 title "A New Approach to Generate Gastruloids to Develop Anterior Neural Tissues" @default.
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• W4385060007 doi "https://doi.org/10.21769/bioprotoc.4722" @default.
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