VEGF-TRAPR1R2 suppresses choroidal neovascularization and VEGF-induced breakdown of the blood–retinal barrier†
Yoshitsugu Saishin
The Departments of Ophthalmology and Neuroscience, The Johns Hopkins University School of Medicine, Maumenee, Baltimore, Maryland
Search for more papers by this authorYumiko Saishin
The Departments of Ophthalmology and Neuroscience, The Johns Hopkins University School of Medicine, Maumenee, Baltimore, Maryland
Search for more papers by this authorKyoichi Takahashi
The Departments of Ophthalmology and Neuroscience, The Johns Hopkins University School of Medicine, Maumenee, Baltimore, Maryland
Search for more papers by this authorRaquel Lima e Silva
The Departments of Ophthalmology and Neuroscience, The Johns Hopkins University School of Medicine, Maumenee, Baltimore, Maryland
Search for more papers by this authorDonna Hylton
Regeneron Pharmaceuticals, Tarrytown, New York, New York
Search for more papers by this authorJohn S. Rudge
Regeneron Pharmaceuticals, Tarrytown, New York, New York
Search for more papers by this authorStanley J. Wiegand
Regeneron Pharmaceuticals, Tarrytown, New York, New York
Search for more papers by this authorCorresponding 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 authorYoshitsugu Saishin
The Departments of Ophthalmology and Neuroscience, The Johns Hopkins University School of Medicine, Maumenee, Baltimore, Maryland
Search for more papers by this authorYumiko Saishin
The Departments of Ophthalmology and Neuroscience, The Johns Hopkins University School of Medicine, Maumenee, Baltimore, Maryland
Search for more papers by this authorKyoichi Takahashi
The Departments of Ophthalmology and Neuroscience, The Johns Hopkins University School of Medicine, Maumenee, Baltimore, Maryland
Search for more papers by this authorRaquel Lima e Silva
The Departments of Ophthalmology and Neuroscience, The Johns Hopkins University School of Medicine, Maumenee, Baltimore, Maryland
Search for more papers by this authorDonna Hylton
Regeneron Pharmaceuticals, Tarrytown, New York, New York
Search for more papers by this authorJohn S. Rudge
Regeneron Pharmaceuticals, Tarrytown, New York, New York
Search for more papers by this authorStanley J. Wiegand
Regeneron Pharmaceuticals, Tarrytown, New York, New York
Search for more papers by this authorCorresponding 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 authorPAC 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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