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. 2025 Aug 21;188(17):4754-4772.e18.
doi: 10.1016/j.cell.2025.05.035. Epub 2025 Jun 18.

Digital reconstruction of full embryos during early mouse organogenesis

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Free article

Digital reconstruction of full embryos during early mouse organogenesis

Peng Xie et al. Cell. .
Free article

Abstract

Early organogenesis is a crucial stage in embryonic development, characterized by extensive cell fate specification to initiate organ formation but also by a high susceptibility to developmental defects. Here, we profiled 285 serial sections from six E7.5-E8.0 embryos to generate full spatiotemporal transcriptome and signal maps during early organogenesis at single-cell resolution. By developing SEU-3D, we reconstructed digital embryos, enabling investigation of regionalized gene expression in the native spatial context. We established a space-informed gene-cell co-embedding approach, systematically characterized the spatial atlas of endoderm and mesoderm derivatives, and elucidated signaling networks across germ layers and cell types. Furthermore, we characterized a primordium determination zone (PDZ) formed along the anterior embryonic-extraembryonic interface at E7.75, and it revealed that the coordinated signaling communications contribute to the formation of cardiac primordium. Collectively, the high-resolution "digital embryo" provides significant insights into early organogenesis and a unique spatial platform for studying development and diseases.

Keywords: cross-germ-layer signal communication; digital embryo; early organogenesis; primordium determination zone; single-cell 3D transcriptome; cardiac crescent.

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Conflict of interest statement

Declaration of interests The authors declare no competing interests.

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