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Related Experiment Videos

VEGF localisation in diabetic retinopathy

M Boulton1, D Foreman, G Williams

  • 1University Department of Ophthalmology, Manchester Royal Eye Hospital.

The British Journal of Ophthalmology
|August 26, 1998
PubMed
Summary

Vascular Endothelial Growth Factor (VEGF) is present in diabetic retinopathy tissues, with staining intensity correlating to disease severity. Laser therapy for proliferative diabetic retinopathy reduces VEGF levels, suggesting its role in the condition.

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Area of Science:

  • Ophthalmology
  • Molecular Biology
  • Pathology

Background:

  • Diabetic retinopathy (DR) is a leading cause of vision loss.
  • Vascular Endothelial Growth Factor (VEGF) is implicated in neovascularization.

Purpose of the Study:

  • To investigate VEGF staining patterns in various stages of diabetic retinopathy.
  • To compare VEGF expression in diabetic preretinal membranes versus non-diabetic membranes.

Main Methods:

  • Immunohistochemistry was used to detect VEGF (VEGF165 and VEGF121,165,189) in human retinal tissues.
  • Tissues included normal retinas, diabetic retinas at different stages, and excised preretinal membranes.

Main Results:

  • VEGF was largely absent in normal retinas but present in most diabetic tissues.

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  • Staining intensity correlated with DR severity, being highest in proliferative stages.
  • Laser photocoagulation reduced VEGF staining to basal levels in treated retinas.
  • Both fibrovascular and fibrocellular membranes showed moderate to intense VEGF staining.

    • Conclusions:

    • VEGF plays a role in both early and proliferative stages of diabetic retinopathy.
    • VEGF expression is altered by disease progression and laser treatment.