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Nat Cell Biol. 2014 Dec;16(12):1146-56. doi: 10.1038/ncb3070. Epub 2014 Nov 24.

SOX17 links gut endoderm morphogenesis and germ layer segregation.

Author information

1
1] Developmental Biology Program, Sloan Kettering Institute, 1275 York Avenue, New York 10065, USA [2] Biochemistry, Cell and Molecular Biology Program, Weill Graduate School of Medical Sciences of Cornell University, New York 10065, USA.
2
Developmental Biology Program, Sloan Kettering Institute, 1275 York Avenue, New York 10065, USA.

Abstract

Gastrulation leads to three germ layers--ectoderm, mesoderm and endoderm--that are separated by two basement membranes. In the mouse embryo, the emergent gut endoderm results from the widespread intercalation of cells of two distinct origins: pluripotent epiblast-derived definitive endoderm (DE) and extra-embryonic visceral endoderm (VE). Here we image the trajectory of prospective DE cells before intercalating into the VE epithelium. We show that the transcription factor SOX17, which is activated in prospective DE cells before intercalation, is necessary for gut endoderm morphogenesis and the assembly of the basement membrane that separates gut endoderm from mesoderm. Our results mechanistically link gut endoderm morphogenesis and germ layer segregation, two central and conserved features of gastrulation.

PMID:
25419850
PMCID:
PMC4250291
DOI:
10.1038/ncb3070
[Indexed for MEDLINE]
Free PMC Article
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