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Ocular neovascularisation and excessive vascular permeability.
1Department of Ophthalmology, The Johns Hopkins University School of Medicine, Maumenee 719, 600 N. Wolfe Street, Baltimore, MD 21287-9277, USA. pcampo@jhmi.edu
Expert Opinion on Biological Therapy
|September 1, 2004
Summary
Vascular endothelial growth factor (VEGF) and Tie2/angiopoietin pathways drive eye diseases causing blindness. Targeting these pathways, alongside antiangiogenic proteins, offers new therapeutic strategies for visual impairment.
Area of Science:
- Ophthalmology
- Molecular Biology
- Angiogenesis Research
Background:
- Ocular vascular leakage and neovascularization are leading causes of vision loss.
- Molecular signaling pathways controlling ocular vascularization are critical for understanding and treating these diseases.
Purpose of the Study:
- To define the molecular signals regulating vascular permeability and neovascularization in the eye.
- To explore potential therapeutic targets within these signaling pathways.
Main Methods:
- Investigated the roles of vascular endothelial growth factor (VEGF) family members and their receptors (VEGFR1, VEGFR2, neuropilins).
- Examined the modulation of VEGF signaling by the Tie2 receptor and angiopoietins.
- Considered the influence of antiangiogenic proteins like endostatin.
Main Results:
- VEGF family members are key stimulators of ocular neovascularization and vascular permeability.
- The Tie2/angiopoietin system modulates VEGF signaling.
- Antiangiogenic proteins, such as endostatin, counteract these stimulatory pathways.
Conclusions:
- The balance between proangiogenic and antiangiogenic factors determines the outcome of ocular vascular diseases.
- Gene transfer presents a potential method to modulate these balances for therapeutic benefit.
- Clinical trials are evaluating the translation of these findings into novel therapies for vision-threatening conditions.