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Endothelial expression of TGFβ type II receptor is required to maintain vascular integrity during postnatal development of the central nervous system.

Allinson, KR; Lee, HS; Fruttiger, M; McCarty, JH; Arthur, HM; (2012) Endothelial expression of TGFβ type II receptor is required to maintain vascular integrity during postnatal development of the central nervous system. PLOS One , 7 (6) , Article e39336. 10.1371/journal.pone.0039336. Green open access

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Abstract

TGFβ signalling in endothelial cells is important for angiogenesis in early embryonic development, but little is known about its role in early postnatal life. To address this we used a tamoxifen inducible Cre-LoxP strategy in neonatal mice to deplete the TypeII TGFβ receptor (Tgfbr2) specifically in endothelial cells. This resulted in multiple micro-haemorrhages, and glomeruloid-like vascular tufts throughout the cerebral cortices and hypothalamus of the brain as well as in retinal tissues. A detailed examination of the retinal defects in these mutants revealed that endothelial adherens and tight junctions were in place, pericytes were recruited and there was no failure of vascular smooth muscle differentiation. However, the deeper retinal plexus failed to form in these mutants and the angiogenic sprouts stalled in their progress towards the inner nuclear layer. Instead the leading endothelial cells formed glomerular tufts with associated smooth muscle cells. This evidence suggests that TGFβ signalling is not required for vessel maturation, but is essential for the organised migration of endothelial cells as they begin to enter the deeper layers of the retina. Thus, TGFβ signalling is essential in vascular endothelial cells for maintaining vascular integrity at the angiogenic front as it migrates into developing neural tissues in early postnatal life.

Type: Article
Title: Endothelial expression of TGFβ type II receptor is required to maintain vascular integrity during postnatal development of the central nervous system.
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1371/journal.pone.0039336
Publisher version: http://dx.doi.org/10.1371/journal.pone.0039336
Language: English
Additional information: © 2012 Allinson et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This work was supported by a BHF senior research fellowship to HMA and the National Institutes of Neurological Disease and Stroke (R01NS059876) to JM. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Keywords: Animals, Central Nervous System, Endothelial Cells, Mice, Mice, Inbred C57BL, Mice, Knockout, Protein-Serine-Threonine Kinases, Receptors, Transforming Growth Factor beta, Retina
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Institute of Ophthalmology
URI: https://discovery.ucl.ac.uk/id/eprint/1361430
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