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2015 ; 2015
(ä): 137136
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Inhibition of Corneal Neovascularization by Subconjunctival Injection of
Fc-Endostatin, a Novel Inhibitor of Angiogenesis
#MMPMID26491546
Yoshida J
; Wicks RT
; Zambrano AI
; Tyler BM
; Javaherian K
; Grossman R
; Daoud YJ
; Gehlbach P
; Brem H
; Stark WJ
J Ophthalmol
2015[]; 2015
(ä): 137136
PMID26491546
show ga
We assessed the antiangiogenic effects of subconjunctival injection of
Fc-endostatin (FcE) using a human vascular endothelial growth factor-induced
rabbit corneal neovascularization model. Angiogenesis was induced in rabbit
corneas through intrastromal implantations of VEGF polymer implanted 2?mm from
the limbus. NZW rabbits were separated into groups receiving twice weekly
subconjunctival injections of either saline; 25?mg/mL bevacizumab; 2?mg/mL FcE;
or 20?mg/mL FcE. Corneas were digitally imaged at 5 time points. An angiogenesis
index (AI) was calculated (vessel length (mm) × vessel number score) for each
observation. All treatment groups showed a significant decrease in the vessel
length and AI compared to saline on all observation days (P < 0.001). By day 15,
FcE 2 inhibited angiogenesis significantly better than FcE 20 (P < 0.01). There
was no significant difference between FcE 2 and BV, although the values trended
towards significantly increased inhibition by BV. BV was a significantly better
inhibitor than FcE 20 by day 8 (P < 0.01). FcE was safe and significantly
inhibited new vessel growth in a rabbit corneal neovascularization model. Lower
concentration FcE 2 exhibited better inhibition than FcE 20, consistent with
previous FcE studies referencing a biphasic dose-response curve. Additional
studies are necessary to further elucidate the efficacy and clinical potential of
this novel angiogenesis inhibitor.