Volume 195, Issue 2 p. 241-248
Original Article

VEGF-TRAPR1R2 suppresses choroidal neovascularization and VEGF-induced breakdown of the blood–retinal barrier

Yoshitsugu Saishin

Yoshitsugu Saishin

The Departments of Ophthalmology and Neuroscience, The Johns Hopkins University School of Medicine, Maumenee, Baltimore, Maryland

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Yumiko Saishin

Yumiko Saishin

The Departments of Ophthalmology and Neuroscience, The Johns Hopkins University School of Medicine, Maumenee, Baltimore, Maryland

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Kyoichi Takahashi

Kyoichi Takahashi

The Departments of Ophthalmology and Neuroscience, The Johns Hopkins University School of Medicine, Maumenee, Baltimore, Maryland

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Raquel Lima e Silva

Raquel Lima e Silva

The Departments of Ophthalmology and Neuroscience, The Johns Hopkins University School of Medicine, Maumenee, Baltimore, Maryland

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Donna Hylton

Donna Hylton

Regeneron Pharmaceuticals, Tarrytown, New York, New York

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John S. Rudge

John S. Rudge

Regeneron Pharmaceuticals, Tarrytown, New York, New York

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Stanley J. Wiegand

Stanley J. Wiegand

Regeneron Pharmaceuticals, Tarrytown, New York, New York

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Peter A. Campochiaro

Corresponding Author

Peter A. Campochiaro

The Departments of Ophthalmology and Neuroscience, The Johns Hopkins University School of Medicine, Maumenee, Baltimore, Maryland

Maumenee 719, The Johns Hopkins University School of Medicine, 600 N. Wolfe Street, Baltimore, MD 21287-9277.Search for more papers by this author
First published: 12 March 2003
Citations: 183

PAC is the George S. and Dolores Dore Eccles Professor of Ophthalmology and Neuroscience.

Abstract

Vascular endothelial growth factor (VEGF) plays a central role in the development of retinal neovascularization and diabetic macular edema. There is also evidence suggesting that VEGF is an important stimulator for choroidal neovascularization. In this study, we investigated the effect of a specific inhibitor of VEGF, VEGF-TRAPR1R2, in models for these disease processes. VEGF-TRAPR1R2 is a fusion protein, which combines ligand binding elements taken from the extracellular domains of VEGF receptors 1 and 2 fused to the Fc portion of IgG1. Subcutaneous injections or a single intravitreous injection of VEGF-TRAPR1R2 strongly suppressed choroidal neovascularization in mice with laser-induced rupture of Bruch's membrane. Subcutaneous injection of VEGF-TRAPR1R2 also significantly inhibited subretinal neovascularization in transgenic mice that express VEGF in photoreceptors. In two models of VEGF-induced breakdown of the blood–retinal barrier (BRB), one in which recombinant VEGF is injected into the vitreous cavity and one in which VEGF expression is induced in the retina in transgenic mice, VEGF-TRAPR1R2 significantly reduced breakdown of the BRB. These data confirm that VEGF is a critical stimulus for the development of choroidal neovascularization and indicate that VEGF-TRAPR1R2 may provide a new agent for consideration for treatment of patients with choroidal neovascularization and diabetic macular edema. © 2003 Wiley-Liss, Inc.

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