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Review

Anti-angiogenic therapy of proliferative diabetic retinopathy

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Pages 395-407 | Published online: 24 Feb 2005
 

Abstract

Proliferative diabetic retinopathy (PDR) remains one of the major causes of acquired blindness in developed nations. This is true despite the development of laser treatment, which can prevent blindness in the majority of those who develop this complication. The hallmark of PDR is neovascularisation (NV), abnormal angiogenesis that may ultimately cause severe vitreous cavity bleeding and/or retinal detachment. Pharmacologic therapy aimed at preventing NV, as an adjunct to laser treatment, or as an alternative to laser treatment, would be a welcome addition to the armamentarium. PDR could be prevented by improved metabolic control or by pharmacologically blunting the biochemical consequences of hyperglycaemia (e.g., with aldose reductase inhibitors, inhibitors of non-enzymatic glycation or by protein kinase C (PKC) inhibition). The angiogenesis in PDR could be treated via growth factor (e.g., vascular endothelial growth factor (VEGF), insulin like growth factor-1) blockade, integrin (e.g., α-v β-3) blockade or extracellular matrix alteration (e.g., with steroid compounds), or interference with intracellular signal transduction pathways (e.g., PKC and mitogen activated protein kinase pathway proteins). Numerous potentially useful anti-angiogenic compounds are in development, but two drugs are presently in clinical trials for the treatment of the preproliferative stage of PDR.

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