Summary
Pathological neovascularization, a leading cause of blindness, is seen in retinopathy of prematurity, diabetic retinopathy and age related macular degeneration. Using a mouse model of hypoxia-driven retinal neovascularization we find that fibroblast growth factor 21 (FGF21) administration suppresses, and FGF21 deficiency worsens, retinal neovessel growth. The protective effect of FGF21 against neovessel growth was abolished in adiponectin (APN)-deficient mice. FGF21 administration also decreased neovascular lesions in two models of neovascular age-related macular degeneration, very-low-density-lipoproteinreceptor- deficient mice with retinal angiomatous proliferation and laser-induced choroidal neovascularization. FGF21 inhibited TNFα expression but did not alter Vegfa expression in neovascular eyes. These data suggest that FGF21 may be a therapeutic target for pathologic vessel growth in patients with neovascular eye diseases including retinopathy of prematurity, diabetic retinopathy and age-related macular degeneration.