Identification of genes involved in VEGF-mediated vascular morphogenesis using embryonic stem cell-derived cystic embryoid bodies

Laboratory Investigation; a Journal of Technical Methods and Pathology
Yin-Shan NgPatricia A D'Amore

Abstract

The vasculature forms during development via two processes, vasculogenesis and angiogenesis, in which vessels form de novo from angioblast precursors or as sprouts from pre-existing vessels, respectively. A common and critical aspect of both processes is vascular morphogenesis, which includes branching of endothelial cell cords and lumen formation. Although ample evidence support the central role of vascular endothelial growth factor (VEGF) in both vasculogenesis and angiogenesis, the role of VEGF in vascular morphogenesis is unclear and little is known about the regulation of vascular morphogenesis, in general. We have used the in vitro vessel differentiation system of embryonic stem (ES) cell-derived cystic embryonic bodies (CEB) as a model for studying VEGF-mediated vessel formation. Whereas CEB formed from wild-type ES cells make well-formed vessel-like structures, CEB derived from VEGF-null ES cells contain PECAM-1-positive endothelial cells, but these cells do not participate in vascular morphogenesis. Using gene expression microarray analysis to compare gene expression in these two systems, we have been able to identify many genes and novel ESTs that are downstream of VEGF function, and which may be involved in VEGF-medi...Continue Reading

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Citations

Feb 6, 2010·Proceedings of the National Academy of Sciences of the United States of America·Ming HuZhu Chen
Apr 20, 2010·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Brad A BryanPatricia A D'Amore
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