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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 Angiogenesis
2018 ; 21
(2
): 267-285
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Selective IKK2 inhibitor IMD0354 disrupts NF-?B signaling to suppress corneal
inflammation and angiogenesis
#MMPMID29332242
Lennikov A
; Mirabelli P
; Mukwaya A
; Schaupper M
; Thangavelu M
; Lachota M
; Ali Z
; Jensen L
; Lagali N
Angiogenesis
2018[May]; 21
(2
): 267-285
PMID29332242
show ga
Corneal neovascularization is a sight-threatening condition caused by
angiogenesis in the normally avascular cornea. Neovascularization of the cornea
is often associated with an inflammatory response, thus targeting VEGF-A alone
yields only a limited efficacy. The NF-?B signaling pathway plays important roles
in inflammation and angiogenesis. Here, we study consequences of the inhibition
of NF-?B activation through selective blockade of the IKK complex I?B kinase ?
(IKK2) using the compound IMD0354, focusing on the effects of inflammation and
pathological angiogenesis in the cornea. In vitro, IMD0354 treatment diminished
HUVEC migration and tube formation without an increase in cell death and arrested
rat aortic ring sprouting. In HUVEC, the IMD0354 treatment caused a
dose-dependent reduction in VEGF-A expression, suppressed TNF?-stimulated
expression of chemokines CCL2 and CXCL5, and diminished actin filament fibers and
cell filopodia formation. In developing zebrafish embryos, IMD0354 treatment
reduced expression of Vegf-a and disrupted retinal angiogenesis. In
inflammation-induced angiogenesis in the rat cornea, systemic selective IKK2
inhibition decreased inflammatory cell invasion, suppressed CCL2, CXCL5, Cxcr2,
and TNF-? expression and exhibited anti-angiogenic effects such as reduced limbal
vessel dilation, reduced VEGF-A expression and reduced angiogenic sprouting,
without noticeable toxic effect. In summary, targeting NF-?B by selective IKK2
inhibition dampened the inflammatory and angiogenic responses in vivo by
modulating the endothelial cell expression profile and motility, thus indicating
an important role of NF-?B signaling in the development of pathologic corneal
neovascularization.