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Morphogenesis of extra-embryonic tissues directs the remodelling of the mouse embryo at implantation
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Morphogenesis of extra-embryonic tissues directs the remodelling of the mouse embryo at implantation
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Journal Article
Morphogenesis of extra-embryonic tissues directs the remodelling of the mouse embryo at implantation
2019
Overview
Mammalian embryos change shape dramatically upon implantation. The cellular and molecular mechanism underlying this transition are largely unknown. Here, we show that this transition is directed by cross talk between the embryonic epiblast and the first extra-embryonic tissue, the trophectoderm. Specifically, we show via visualisation of a Cdx2-GFP reporter line and pharmacologically mediated loss and gain of function experiments that the epiblast provides FGF signal that results in differential fate acquisition in the multipotent trophectoderm leading to the formation of a tissue boundary within this tissue. The trophectoderm boundary becomes essential for expansion of the tissue into a multi-layered epithelium. Folding of this multi-layered trophectoderm induces spreading of the second extra-embryonic tissue, the primitive endoderm. Together, these events remodel the pre-implantation embryo into its post-implantation cylindrical shape. Our findings uncover how communication between embryonic and extra-embryonic tissues provides positional cues to drive shape changes in mammalian development during implantation.
How the shape of the pre-implantation murine embryo changes dramatically upon implantation is unclear. Here, the authors use live imaging with a cdx2-GFP reporter line in combination with loss of function experiments to demonstrate that FGF signalling mediated trophectoderm morphogenesis orchestrates this process.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 14/1
/ 14/19
/ 64/60
/ Animals
/ Cancer
/ Embryo Implantation - physiology
/ Embryo, Mammalian - diagnostic imaging
/ Embryo, Mammalian - embryology
/ Embryos
/ Endoderm
/ Female
/ Fibroblast Growth Factors - metabolism
/ Germ Layers - diagnostic imaging
/ Humanities and Social Sciences
/ Ligands
/ Male
/ Mammals
/ Mice
/ Science
/ Tissues
