TY  - JOUR
AU  - Kim, Jaeryung
AU  - Park, Jang Ryul
AU  - Choi, Jeongwoon
AU  - Park, Intae
AU  - Hwang, Yoonha
AU  - Bae, Hosung
AU  - Kim, Yongjoo
AU  - Choi, WooJhon
AU  - Yang, Jee Myung
AU  - Han, Sangyeul
AU  - Chung, Tae-Young
AU  - Kim, Pilhan
AU  - Kubota, Yoshiaki
AU  - Augustin, Hellmut
AU  - Oh, Wang-Yuhl
AU  - Koh, Gou Young
TI  - Tie2 activation promotes choriocapillary regeneration for alleviating neovascular age-related macular degeneration.
JO  - Science advances
VL  - 5
IS  - 2
SN  - 2375-2548
CY  - Washington, DC [u.a.]
PB  - Assoc.
M1  - DKFZ-2020-00716
SP  - eaau6732 -
PY  - 2019
N1  - DKFZ-ZMBH Alliance
AB  - 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.
KW  - Angiopoietin-1 (NLM Chemicals)
KW  - Angpt1 protein, mouse (NLM Chemicals)
KW  - Vascular Endothelial Growth Factor A (NLM Chemicals)
KW  - Receptor, TIE-2 (NLM Chemicals)
KW  - Tek protein, mouse (NLM Chemicals)
LB  - PUB:(DE-HGF)16
C6  - pmid:30788433
C2  - pmc:PMC6374104
DO  - DOI:10.1126/sciadv.aau6732
UR  - https://inrepo02.dkfz.de/record/154376
ER  -