VEGFR1-mediated pericyte ablation links VEGF and PlGF to cancer-associated retinopathy.

Abstract

VEGF coordinates complex regulation of cellular regeneration and interactions between endothelial and perivascular cells; dysfunction of the VEGF signaling system leads to retinopathy. Here, we show that systemic delivery of VEGF and placental growth factor (PlGF) by protein implantation, tumors, and adenoviral vectors ablates pericytes from the mature retinal vasculature through the VEGF receptor 1 (VEGFR1)-mediated signaling pathway, leading to increased vascular leakage. In contrast, we demonstrate VEGF receptor 2 (VEGFR2) is primarily expressed in nonvascular photoreceptors and ganglion cells. Moreover, blockade of VEGFR1 but not VEGFR2 significantly restores pericyte saturation in mature retinal vessels. Our findings link VEGF and PlGF to cancer-associated retinopathy, reveal the molecular mechanisms of VEGFR1 ligand-mediated retinopathy, and define VEGFR1 as an important target of antiangiogenic therapy for treatment of retinopathy.

DOI: 10.1073/pnas.0911661107

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@article{Cao2010VEGFR1mediatedPA, title={VEGFR1-mediated pericyte ablation links VEGF and PlGF to cancer-associated retinopathy.}, author={Renhai Cao and Yuan Xue and Eva-Maria Eleonora Hedlund and Zhaodong Zhong and Katerina Tritsaris and Barbara Tondelli and Franco Lucchini and Zhenping Zhu and Steen Dissing and Yihai Cao}, journal={Proceedings of the National Academy of Sciences of the United States of America}, year={2010}, volume={107 2}, pages={856-61} }