Tie2 activation promotes choriocapillary regeneration for alleviating neovascular age-related macular degeneration

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Choriocapillary loss is a major cause of neovascular age-related macular degeneration (NV-AMD). Although vascular endothelial growth factor (VEGF) blockade for NV-AMD has shown beneficial outcomes, unmet medical needs for patients refractory or tachyphylactic to anti-VEGF therapy exist. In addition, the treatment could exacerbate choriocapillary rarefaction, necessitating advanced treatment for fundamental recovery from NV-AMD. In this study, Tie2 activation by angiopoietin-2-binding and Tie2-activating antibody (ABTAA) presents a therapeutic strategy for NV-AMD. Conditional Tie2 deletion impeded choriocapillary maintenance, rendering eyes susceptible to NV-AMD development. Moreover, in a NV-AMD mouse model, ABTAA not only suppressed choroidal neovascularization (CNV) and vascular leakage but also regenerated the choriocapillaris and relieved hypoxia. Conversely, VEGF blockade degenerated the choriocapillaris and exacerbated hypoxia, although it suppressed CNV and vascular leakage. Together, we establish that angiopoietin-Tie2 signaling is critical for choriocapillary maintenance and that ABTAA represents an alternative, combinative therapeutic strategy for NV-AMD by alleviating anti-VEGF adverse effects.
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Issue Date
2019-02
Language
English
Article Type
Article
Citation

SCIENCE ADVANCES, v.5, no.2

ISSN
2375-2548
DOI
10.1126/sciadv.aau6732
URI
http://hdl.handle.net/10203/251996
Appears in Collection
NT-Journal Papers(저널논문)ME-Journal Papers(저널논문)MSE-Journal Papers(저널논문)
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