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2014 ; 141
(7
): 1465-72
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Dynamin 2 regulation of integrin endocytosis, but not VEGF signaling, is crucial
for developmental angiogenesis
#MMPMID24598168
Lee MY
; Skoura A
; Park EJ
; Landskroner-Eiger S
; Jozsef L
; Luciano AK
; Murata T
; Pasula S
; Dong Y
; Bouaouina M
; Calderwood DA
; Ferguson SM
; De Camilli P
; Sessa WC
Development
2014[Apr]; 141
(7
): 1465-72
PMID24598168
show ga
Here we show that dynamin 2 (Dnm2) is essential for angiogenesis in vitro and in
vivo. In cultured endothelial cells lacking Dnm2, vascular endothelial growth
factor (VEGF) signaling and receptor levels are augmented whereas cell migration
and morphogenesis are impaired. Mechanistically, the loss of Dnm2 increases focal
adhesion size and the surface levels of multiple integrins and reduces the
activation state of ?1 integrin. In vivo, the constitutive or inducible loss of
Dnm2 in endothelium impairs branching morphogenesis and promotes the accumulation
of ?1 integrin at sites of failed angiogenic sprouting. Collectively, our data
show that Dnm2 uncouples VEGF signaling from function and coordinates the
endocytic turnover of integrins in a manner that is crucially important for
angiogenesis in vitro and in vivo.
|Animals
[MESH]
|Animals, Newborn
[MESH]
|Blood Vessels/*embryology/growth & development
[MESH]