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Endothelial Cells Control Pancreatic Cell Fate at Defined Stages through EGFL7 Signaling

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Mus musculus Homo sapiens

PROVIDER: GSE63845 | GEO | 2014/12/04

SECONDARY ACCESSION(S): PRJNA269248

REPOSITORIES: GEO

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Endothelial Cells Control Pancreatic Cell Fate at Defined Stages through EGFL7 Signaling

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Endothelial cells control pancreatic cell fate at defined stages through EGFL7 signaling.

Project description:Although endothelial cells have been shown to affect mouse pancreatic development, their precise function in human development remains unclear. Using a coculture system containing human embryonic stem cell (hESC)-derived progenitors and endothelial cells, we found that endothelial cells play a stage-dependent role in pancreatic development, in which they maintain pancreatic progenitor (PP) self-renewal and impair further differentiation into hormone-expressing cells. The mechanistic studies suggest that the endothelial cells act through the secretion of EGFL7. Consistently, endothelial overexpression of EGFL7 in vivo using a transgenic mouse model resulted in an increase of PP proliferation rate and a decrease of differentiation toward endocrine cells. These studies not only identified the role of EGFL7 as the molecular handle involved in the crosstalk between endothelium and pancreatic epithelium, but also provide a paradigm for using hESC stepwise differentiation to dissect the stage-dependent roles of signals controlling organogenesis.

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