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Photoreceptor avascular privilege is shielded by soluble VEGF receptor-1.


ABSTRACT: Optimal phototransduction requires separation of the avascular photoreceptor layer from the adjacent vascularized inner retina and choroid. Breakdown of peri-photoreceptor vascular demarcation leads to retinal angiomatous proliferation or choroidal neovascularization, two variants of vascular invasion of the photoreceptor layer in age-related macular degeneration (AMD), the leading cause of irreversible blindness in industrialized nations. Here we show that sFLT-1, an endogenous inhibitor of vascular endothelial growth factor A (VEGF-A), is synthesized by photoreceptors and retinal pigment epithelium (RPE), and is decreased in human AMD. Suppression of sFLT-1 by antibodies, adeno-associated virus-mediated RNA interference, or Cre/lox-mediated gene ablation either in the photoreceptor layer or RPE frees VEGF-A and abolishes photoreceptor avascularity. These findings help explain the vascular zoning of the retina, which is critical for vision, and advance two transgenic murine models of AMD with spontaneous vascular invasion early in life. DOI:http://dx.doi.org/10.7554/eLife.00324.001.

SUBMITTER: Luo L 

PROVIDER: S-EPMC3687373 | biostudies-literature | 2013 Jun

REPOSITORIES: biostudies-literature

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Photoreceptor avascular privilege is shielded by soluble VEGF receptor-1.

Luo Ling L   Uehara Hironori H   Zhang Xiaohui X   Das Subrata K SK   Olsen Thomas T   Holt Derick D   Simonis Jacquelyn M JM   Jackman Kyle K   Singh Nirbhai N   Miya Tadashi R TR   Huang Wei W   Ahmed Faisal F   Bastos-Carvalho Ana A   Le Yun Zheng YZ   Mamalis Christina C   Chiodo Vince A VA   Hauswirth William W WW   Baffi Judit J   Lacal Pedro M PM   Orecchia Angela A   Ferrara Napoleone N   Gao Guangping G   Young-Hee Kim K   Fu Yingbin Y   Owen Leah L   Albuquerque Romulo R   Baehr Wolfgang W   Thomas Kirk K   Li Dean Y DY   Chalam Kakarla V KV   Chalam Kakarla V KV   Shibuya Masabumi M   Grisanti Salvatore S   Wilson David J DJ   Ambati Jayakrishna J   Ambati Balamurali K BK  

eLife 20130618


Optimal phototransduction requires separation of the avascular photoreceptor layer from the adjacent vascularized inner retina and choroid. Breakdown of peri-photoreceptor vascular demarcation leads to retinal angiomatous proliferation or choroidal neovascularization, two variants of vascular invasion of the photoreceptor layer in age-related macular degeneration (AMD), the leading cause of irreversible blindness in industrialized nations. Here we show that sFLT-1, an endogenous inhibitor of vas  ...[more]

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