Budding epithelial morphogenesis driven by cell-matrix versus cell-cell adhesion

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Cell. ;184:3702-3716.e30. doi: https://doi.org/10.1016/j.cell.2021.05.015

Budding epithelial morphogenesis driven by cell-matrix versus cell-cell adhesion Wang (Shaohe) Lab

Wang Shaohe, Matsumoto Kazue, Lish Samantha, Cartagena-Rivera Alexander, Yamada Kenneth

Note: Research in this publication was not performed at Janelia.

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Abstract

Summary Many embryonic organs undergo epithelial morphogenesis to form tree-like hierarchical structures. However, it remains unclear what drives the budding and branching of stratified epithelia, such as in the embryonic salivary gland and pancreas. Here, we performed live-organ imaging of mouse embryonic salivary glands at single-cell resolution to reveal that budding morphogenesis is driven by expansion and folding of a distinct epithelial surface cell sheet characterized by strong cell-matrix adhesions and weak cell-cell adhesions. Profiling of single-cell transcriptomes of this epithelium revealed spatial patterns of transcription underlying these cell adhesion differences. We then synthetically reconstituted budding morphogenesis by experimentally suppressing E-cadherin expression and inducing basement membrane formation in 3D spheroid cultures of engineered cells, which required β1-integrin-mediated cell-matrix adhesion for successful budding. Thus, stratified epithelial budding, the key first step of branching morphogenesis, is driven by an overall combination of strong cell-matrix adhesion and weak cell-cell adhesion by peripheral epithelial cells.

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Budding epithelial morphogenesis driven by cell-matrix versus cell-cell adhesion

Note: Research in this publication was not performed at Janelia.

Abstract

Janelia Authors