Arteries are formed by vein-derived endothelial tip cells

Tissue vascularization entails the formation of a blood vessel plexus, which remodels into arteries and veins. Here we show, by using time-lapse imaging of zebrafish fin regeneration and genetic lineage tracing of endothelial cells in the mouse retina, that vein-derived endothelial tip cells contrib...

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Veröffentlicht in:Nature communications 2014-12, Vol.5 (1), p.5758-5758, Article 5758
Hauptverfasser: Xu, Cong, Hasan, Sana S., Schmidt, Inga, Rocha, Susana F., Pitulescu, Mara E., Bussmann, Jeroen, Meyen, Dana, Raz, Erez, Adams, Ralf H., Siekmann, Arndt F.
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container_title Nature communications
container_volume 5
creator Xu, Cong
Hasan, Sana S.
Schmidt, Inga
Rocha, Susana F.
Pitulescu, Mara E.
Bussmann, Jeroen
Meyen, Dana
Raz, Erez
Adams, Ralf H.
Siekmann, Arndt F.
description Tissue vascularization entails the formation of a blood vessel plexus, which remodels into arteries and veins. Here we show, by using time-lapse imaging of zebrafish fin regeneration and genetic lineage tracing of endothelial cells in the mouse retina, that vein-derived endothelial tip cells contribute to emerging arteries. Our movies uncover that arterial-fated tip cells change migration direction and migrate backwards within the expanding vascular plexus. This behaviour critically depends on chemokine receptor cxcr4a function. We show that the relevant Cxcr4a ligand Cxcl12a selectively accumulates in newly forming bone tissue even when ubiquitously overexpressed, pointing towards a tissue-intrinsic mode of chemokine gradient formation. Furthermore, we find that cxcr4a mutant cells can contribute to developing arteries when in association with wild-type cells, suggesting collective migration of endothelial cells. Together, our findings reveal specific cell migratory behaviours in the developing blood vessel plexus and uncover a conserved mode of artery formation. Sprouting of new blood vessels depends on the migration of endothelial tip cells into surrounding tissue. Here the authors reveal the existence of a distinct migratory signalling circuit that guides endothelial cells from developing veins to the leading tip position in developing arteries.
doi_str_mv 10.1038/ncomms6758
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Here we show, by using time-lapse imaging of zebrafish fin regeneration and genetic lineage tracing of endothelial cells in the mouse retina, that vein-derived endothelial tip cells contribute to emerging arteries. Our movies uncover that arterial-fated tip cells change migration direction and migrate backwards within the expanding vascular plexus. This behaviour critically depends on chemokine receptor cxcr4a function. We show that the relevant Cxcr4a ligand Cxcl12a selectively accumulates in newly forming bone tissue even when ubiquitously overexpressed, pointing towards a tissue-intrinsic mode of chemokine gradient formation. Furthermore, we find that cxcr4a mutant cells can contribute to developing arteries when in association with wild-type cells, suggesting collective migration of endothelial cells. Together, our findings reveal specific cell migratory behaviours in the developing blood vessel plexus and uncover a conserved mode of artery formation. 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subjects 14
14/19
14/35
14/63
38/71
631/136/16
631/80/84
64/116
Animal Fins - blood supply
Animal Fins - cytology
Animal Fins - growth & development
Animal Fins - metabolism
Animals
Animals, Genetically Modified
Arteries - cytology
Arteries - growth & development
Arteries - metabolism
Cell Lineage - genetics
Cell Movement
Chemokine CXCL12 - genetics
Chemokine CXCL12 - metabolism
Endothelial Cells - cytology
Endothelial Cells - metabolism
Endothelium, Vascular - cytology
Endothelium, Vascular - growth & development
Endothelium, Vascular - metabolism
Gene Expression Regulation, Developmental
Humanities and Social Sciences
Mice
multidisciplinary
Neovascularization, Physiologic
Receptors, CXCR4 - genetics
Receptors, CXCR4 - metabolism
Retina - cytology
Retina - growth & development
Retina - metabolism
Science
Science (multidisciplinary)
Signal Transduction
Time-Lapse Imaging
Veins - cytology
Veins - growth & development
Veins - metabolism
Zebrafish - genetics
Zebrafish - metabolism
Zebrafish Proteins - genetics
Zebrafish Proteins - metabolism
title Arteries are formed by vein-derived endothelial tip cells
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