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Hypoxia-Induced Retinal Angiogenesis in Zebrafish as a Model to Study Retinopathy
Södertörns högskola, Institutionen för livsvetenskaper.
Södertörns högskola, Institutionen för livsvetenskaper.
Vise andre og tillknytning
2008 (engelsk)Inngår i: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 3, nr 7, s. e2748-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Mechanistic understanding and defining novel therapeutic targets of diabetic retinopathy and age-related macular degeneration (AMD) have been hampered by a lack of appropriate adult animal models. Here we describe a simple and highly reproducible adult fli-EGFP transgenic zebrafish model to study retinal angiogenesis. The retinal vasculature in the adult zebrafish is highly organized and hypoxia-induced neovascularization occurs in a predictable area of capillary plexuses. New retinal vessels and vascular sprouts can be accurately measured and quantified. Orally active anti-VEGF agents including sunitinib and ZM323881 effectively block hypoxia-induced retinal neovascularization. Intriguingly, blockage of the Notch signaling pathway by the inhibitor DAPT under hypoxia, results in a high density of arterial sprouting in all optical arteries. The Notch suppression-induced arterial sprouting is dependent on tissue hypoxia. However, in the presence of DAPT substantial endothelial tip cell formation was detected only in optic capillary plexuses under normoxia. These findings suggest that hypoxia shifts the vascular targets of Notch inhibitors. Our findings for the first time show a clinically relevant retinal angiogenesis model in adult zebrafish, which might serve as a platform for studying mechanisms of retinal angiogenesis, for defining novel therapeutic targets, and for screening of novel antiangiogenic drugs.

sted, utgiver, år, opplag, sider
2008. Vol. 3, nr 7, s. e2748-
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URN: urn:nbn:se:sh:diva-14141DOI: 10.1371/journal.pone.0002748ISI: 000264302900019Scopus ID: 2-s2.0-50249086022OAI: oai:DiVA.org:sh-14141DiVA, id: diva2:467033
Tilgjengelig fra: 2011-12-18 Laget: 2011-12-16 Sist oppdatert: 2017-12-08bibliografisk kontrollert

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