Anti-angiogenic effect of caffeic acid on retinal neovascularization

Area of Science:

• Ophthalmology
• Vascular Biology
• Pharmacology

Background:

• Pathological angiogenesis is a leading cause of vision loss, affecting conditions like retinopathy of prematurity (ROP), diabetic retinopathy, and age-related macular degeneration.
• Retinopathy of prematurity (ROP) is a serious proliferative disease affecting the retinal vasculature in premature infants.

Purpose of the Study:

• To investigate the anti-angiogenic potential of caffeic acid (CA) in retinal endothelial cells and a mouse model of ROP.
• To explore the relationship between CA's antioxidant activity and its effect on VEGF expression and neovascularization.

Main Methods:

• Assessed the effect of CA on VEGF-induced proliferation, migration, and tube formation of retinal endothelial cells in vitro.
• Evaluated CA's inhibitory activity on H(2)O(2)-induced reactive oxygen species (ROS) production and VEGF expression.
• Examined the efficacy of CA in suppressing retinal neovascularization in an oxygen-induced retinopathy (OIR) mouse model, a model for ROP.

Main Results:

• Caffeic acid (CA) inhibited VEGF-induced proliferation of retinal endothelial cells in a concentration-dependent manner.
• CA completely blocked VEGF-induced migration and tube formation of retinal endothelial cells.
• CA demonstrated antioxidant activity by inhibiting ROS production and VEGF expression, and significantly suppressed retinal neovascularization in the OIR mouse model without causing retinal cytotoxicity.

Conclusions:

• Caffeic acid (CA) exhibits significant anti-angiogenic and antioxidant properties relevant to retinal vascular diseases.
• CA effectively reduces retinal neovascularization in an animal model of ROP, suggesting its potential as a therapeutic agent.
• CA may be a promising candidate for treating ROP and other vaso-proliferative retinopathies.