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Significance Developing effective antiangiogenesis strategies remains clinically challenging. Unlike physiological angiogenesis, pathological angiogenesis comprises of many microvessels that do not fully mature or develop functionally, because the cell fate decision about which endothelial cells become the tip and lead the following stalk cells is dysregulated. We devised a specific theoretical framework to decipher the cross-talk between two crucial players of the decision-making process of tip and stalk cell fate: VEGF and Notch-Delta-Jagged signaling. We find that high expression of Jagged, but not Delta, can destabilize the terminal differentiation into tip or stalk cells and give rise to a hybrid tip/stalk phenotype, a phenotype that can transform physiological into pathological angiogenesis. Our results offer insights into why tumor-stroma communication often implicates Jagged.

Jagged mediates differences in normal and tumor angiogenesis by affecting tip-stalk fate decision