Vascular endothelial growth factor and diabetic retinopathy: role of oxidative stress.

Abstract:

:Retinal neovascularization and macular edema are central features of diabetic retinopathy, a major cause of blindness in working age adults. The currently established treatment for diabetic retinopathy targets the vascular pathology by laser photocoagulation. This approach is associated with significant adverse effects due the destruction of neural tissue and is not always effective. Characterization of the molecular and cellular processes involved in vascular growth and hyperpermeability has led to the recognition that the angiogenic growth factor and vascular permeability factor VEGF (vascular endothelial growth factor) play a pivotal role in the retinal microvascular complications of diabetes. Thus, VEGF represents an important target for therapeutic intervention in diabetic retinopathy. Agents that directly inhibit the actions of VEGF and its receptors show considerable promise, but have not proven to be completely effective in blocking pathological angiogenesis. Therefore, a better understanding of the molecular events that control VEGF expression and mediate its downstream actions is important to define more precise therapeutic targets for intervention in diabetic retinopathy. This review highlights the current understanding of the process by which VEGF gene expression is regulated and how VEGF's biological effects are altered during diabetes. In particular, cellular and molecular alterations seen in diabetic models are considered in the context of high glucose-mediated oxidative stress effects on VEGF expression and action. Potential therapeutic strategies for preventing VEGF overexpression or blocking its pathological actions in the diabetic retina are considered.

journal_name

Curr Drug Targets

journal_title

Current drug targets

authors

Caldwell RB,Bartoli M,Behzadian MA,El-Remessy AE,Al-Shabrawey M,Platt DH,Liou GI,Caldwell RW

doi

10.2174/1389450054021981

keywords:

subject

Has Abstract

pub_date

2005-06-01 00:00:00

pages

511-24

issue

4

eissn

1389-4501

issn

1873-5592

journal_volume

6

pub_type

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