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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Commun
2017 ; 8
(1
): 1574
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Pericytes regulate VEGF-induced endothelial sprouting through VEGFR1
#MMPMID29146905
Eilken HM
; Diéguez-Hurtado R
; Schmidt I
; Nakayama M
; Jeong HW
; Arf H
; Adams S
; Ferrara N
; Adams RH
Nat Commun
2017[Nov]; 8
(1
): 1574
PMID29146905
show ga
Pericytes adhere to the abluminal surface of endothelial tubules and are required
for the formation of stable vascular networks. Defective endothelial
cell-pericyte interactions are frequently observed in diseases characterized by
compromised vascular integrity such as diabetic retinopathy. Many functional
properties of pericytes and their exact role in the regulation of angiogenic
blood vessel growth remain elusive. Here we show that pericytes promote
endothelial sprouting in the postnatal retinal vasculature. Using genetic and
pharmacological approaches, we show that the expression of vascular endothelial
growth factor receptor 1 (VEGFR1) by pericytes spatially restricts VEGF
signalling. Angiogenic defects caused by pericyte depletion are phenocopied by
intraocular injection of VEGF-A or pericyte-specific inactivation of the murine
gene encoding VEGFR1. Our findings establish that pericytes promote endothelial
sprouting, which results in the loss of side branches and the enlargement of
vessels when pericyte function is impaired or lost.