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Astrocyte-derived vascular endothelial growth factor stabilizes vessels in the developing retinal vasculature

Record type: Article

Vascular endothelial growth factor (VEGF) plays a critical role in normal development as well as retinal vasculature disease. During retinal vascularization, VEGF is most strongly expressed by not yet vascularized retinal astrocytes, but also by retinal astrocytes within the developing vascular plexus, suggesting a role for retinal astrocyte-derived VEGF in angiogenesis and vessel network maturation. To test the role of astrocyte-derived VEGF, we used Cre-lox technology in mice to delete VEGF in retinal astrocytes during development. Surprisingly, this only had a minor impact on retinal vasculature development, with only small decreases in plexus spreading, endothelial cell proliferation and survival observed. In contrast, astrocyte VEGF deletion had more pronounced effects on hyperoxia-induced vaso-obliteration and led to the regression of smooth muscle cell-coated radial arteries and veins, which are usually resistant to the vessel-collapsing effects of hyperoxia. These results suggest that VEGF production from retinal astrocytes is relatively dispensable during development, but performs vessel stabilizing functions in the retinal vasculature and might be relevant for retinopathy of prematurity in humans.

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Citation

Connon, Che John, Scott, Andrew, Powner, Michael B., Gandhi, Pranita, Clarkin, Claire, Gutmann, David H., Johnson, Randall S., Ferrara, Napoleone and Fruttiger, Marcus (2010) Astrocyte-derived vascular endothelial growth factor stabilizes vessels in the developing retinal vasculature PLoS ONE, 5, (7), e11863. (doi:10.1371/journal.pone.0011863).

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Published date: 29 July 2010
Organisations: Biomedicine

Identifiers

Local EPrints ID: 339882
URI: http://eprints.soton.ac.uk/id/eprint/339882
ISSN: 1932-6203
PURE UUID: 710b9fda-67bb-4a08-bebe-f231269a1f23

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Date deposited: 31 May 2012 16:56
Last modified: 18 Jul 2017 05:51

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Contributors

Author: Che John Connon
Author: Andrew Scott
Author: Michael B. Powner
Author: Pranita Gandhi
Author: Claire Clarkin
Author: David H. Gutmann
Author: Randall S. Johnson
Author: Napoleone Ferrara
Author: Marcus Fruttiger

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