Abstract
During early mammalian development, the endoderm germ layer forms the foundation of the respiratory and digestive systems through complex patterning. This intricate process, guided by a series of cell fate decisions, remains only partially understood. Our study introduces innovative genetic tracing codes for 14 distinct endodermal regions using novel mouse strains. By integrating high-throughput and high-precision single-cell RNA sequencing with sophisticated imaging, we detailed the spatiotemporal and genetic lineage differentiation of the endoderm at single-cell resolution. We discovered an unexpected multipotentiality within early endodermal regions, allowing differentiation into various organ primordia. This research illuminates the complex and underestimated phenomenon where endodermal organs develop from multiple origins, prompting a reevaluation of traditional differentiation models. Our findings advance understanding in developmental biology and have significant implications for regenerative medicine and the development of advanced organoid models, providing insights into the intricate mechanisms that guide organogenesis.
Published Version
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