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Roundabout4 is essential for angiogenesis in vivo.


ABSTRACT: Stereotypical patterns of vascular and neuronal networks suggest that specific genetic programs tightly control path determination and, consequently, angiogenesis and axon-guidance mechanisms. Our study focuses on one member of the roundabout family of receptors, which traditionally mediate repulsion from the midline. Here, we characterize a fourth member of this family, roundabout4 (robo4), which is the predominant roundabout (robo) that is expressed in embryonic zebrafish vasculature. Gene knockdown and overexpression approaches show that robo4 is essential for coordinated symmetric and directed sprouting of intersomitic vessels and provide mechanistic insights into this process. Also, human robo4 gene functionally compensates for loss of robo4 gene function, suggesting evolutionary conservation. This article reports an endothelial-specific function for a robo gene in vertebrates in vivo.

SUBMITTER: Bedell VM 

PROVIDER: S-EPMC1088354 | biostudies-literature | 2005 May

REPOSITORIES: biostudies-literature

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roundabout4 is essential for angiogenesis in vivo.

Bedell Victoria M VM   Yeo Sang-Yeob SY   Park Kye Won KW   Chung Jeffrey J   Seth Pankaj P   Shivalingappa Venkatesha V   Zhao Jinhua J   Obara Tomoko T   Sukhatme Vikas P VP   Drummond Iain A IA   Li Dean Y DY   Ramchandran Ramani R  

Proceedings of the National Academy of Sciences of the United States of America 20050422 18


Stereotypical patterns of vascular and neuronal networks suggest that specific genetic programs tightly control path determination and, consequently, angiogenesis and axon-guidance mechanisms. Our study focuses on one member of the roundabout family of receptors, which traditionally mediate repulsion from the midline. Here, we characterize a fourth member of this family, roundabout4 (robo4), which is the predominant roundabout (robo) that is expressed in embryonic zebrafish vasculature. Gene kno  ...[more]

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