Extrinsic and intrinsic mechanisms directing epithelial cell sheet replacement during Drosophila metamorphosis.

Abstract excerpt

The fusion of epithelial sheets is an essential morphogenetic event. Here, we study the development of the abdomen of Drosophila as a model of bounded epithelia expansion and uncover a complex multistep process for the generation of the adult epidermis from histoblasts, founder cells that replace the larval cells during metamorphosis. We find that histoblasts experience a biphasic cell cycle and emit apical...

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