5 years ago

Critical role of caveolin-1 in ocular neovascularization and multitargeted antiangiogenic effects of cavtratin via JNK [Medical Sciences]

Critical role of caveolin-1 in ocular neovascularization and multitargeted antiangiogenic effects of cavtratin via JNK [Medical Sciences]
Yida Jiang, Bin Wang, Xianchai Lin, Xuri Li, Geng Tian, Zhongshu Tang, Zhimin Ye, Liying Xing, Qishan Chen, Xiangke Yin, Chunsik Lee, Rong Ju, Fan Zhang, Yuxiang Du, Yizhi Liu, Jia Mi, Wei Chen, Xiangrong Ren, Shasha Wang, William C. Sessa, Yihai Cao, Lijuan Huang, Zhiqin Gao

Ocular neovascularization is a devastating pathology of numerous ocular diseases and is a major cause of blindness. Caveolin-1 (Cav-1) plays important roles in the vascular system. However, little is known regarding its function and mechanisms in ocular neovascularization. Here, using comprehensive model systems and a cell permeable peptide of Cav-1, cavtratin, we show that Cav-1 is a critical player in ocular neovascularization. The genetic deletion of Cav-1 exacerbated and cavtratin administration inhibited choroidal and retinal neovascularization. Importantly, combined administration of cavtratin and anti–VEGF-A inhibited neovascularization more effectively than monotherapy, suggesting the existence of other pathways inhibited by cavtratin in addition to VEGF-A. Indeed, we found that cavtratin suppressed multiple critical components of pathological angiogenesis, including inflammation, permeability, PDGF-B and endothelial nitric oxide synthase expression (eNOS). Mechanistically, we show that cavtratin inhibits CNV and the survival and migration of microglia and macrophages via JNK. Together, our data demonstrate the unique advantages of cavtratin in antiangiogenic therapy to treat neovascular diseases.

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