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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 Circulation
2014 ; 130
(15
): 1274-86
Nephropedia Template TP
gab.com Text
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English Wikipedia
Alternatively spliced tissue factor promotes plaque angiogenesis through the
activation of hypoxia-inducible factor-1? and vascular endothelial growth factor
signaling
#MMPMID25116956
Giannarelli C
; Alique M
; Rodriguez DT
; Yang DK
; Jeong D
; Calcagno C
; Hutter R
; Millon A
; Kovacic JC
; Weber T
; Faries PL
; Soff GA
; Fayad ZA
; Hajjar RJ
; Fuster V
; Badimon JJ
Circulation
2014[Oct]; 130
(15
): 1274-86
PMID25116956
show ga
BACKGROUND: Alternatively spliced tissue factor (asTF) is a novel isoform of
full-length tissue factor, which exhibits angiogenic activity. Although asTF has
been detected in human plaques, it is unknown whether its expression in
atherosclerosis causes increased neovascularization and an advanced plaque
phenotype. METHODS AND RESULTS: Carotid (n=10) and coronary (n=8) specimens from
patients with stable or unstable angina were classified as complicated or
uncomplicated on the basis of plaque morphology. Analysis of asTF expression and
cell type-specific expression revealed a strong expression and colocalization of
asTF with macrophages and neovessels within complicated, but not uncomplicated,
human plaques. Our results showed that the angiogenic activity of asTF is
mediated via hypoxia-inducible factor-1? upregulation through integrins and
activation of phosphatidylinositol-3-kinase/Akt and mitogen-activated protein
kinase pathways. Hypoxia-inducible factor-1? upregulation by asTF also was
associated with increased vascular endothelial growth factor expression in
primary human endothelial cells, and vascular endothelial growth factor-Trap
significantly reduced the angiogenic effect of asTF in vivo. Furthermore, asTF
gene transfer significantly increased neointima formation and neovascularization
after carotid wire injury in ApoE(-/-) mice. CONCLUSIONS: The results of this
study provide strong evidence that asTF promotes neointima formation and
angiogenesis in an experimental model of accelerated atherosclerosis. Here, we
demonstrate that the angiogenic effect of asTF is mediated via the activation of
the hypoxia-inducible factor-1/vascular endothelial growth factor signaling. This
mechanism may be relevant to neovascularization and the progression and
associated complications of human atherosclerosis as suggested by the increased
expression of asTF in complicated versus uncomplicated human carotid and coronary
plaques.