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The Corneal Micropocket Assay: A Model of Angiogenesis in the Mouse Eye
Published on: August 16, 2014
Long-term global retinal microvascular changes in a transgenic vascular endothelial growth factor mouse model
W-Y Shen1, C M Lai, C E Graham
1Centre of Ophthalmology and Visual Science, The University of Western Australia, Nedlands, Perth, WA, Australia.
Diabetologia
|June 6, 2006
Summary
Transgenic mice with moderate vascular endothelial growth factor (VEGF) expression developed diabetic retinopathy-like changes. These changes progressed over time, mimicking the human disease and offering a model for therapeutic testing.
Area of Science:
- Ophthalmology
- Vascular Biology
- Genetics
Background:
- Diabetic retinopathy (DR) pathogenesis involves vascular endothelial growth factor (VEGF).
- Understanding DR progression and developing effective treatments remain critical challenges.
Purpose of the Study:
- To investigate if transgenic mice with photoreceptor-specific VEGF expression (trVEGF029) develop DR-like changes.
- To determine if these DR-like changes progress over time in the trVEGF029 model.
Main Methods:
- Quantitative analysis of human VEGF (hVEGF) expression and serum glucose levels.
- Fundus fluorescein angiography (FA) to assess vascular leakage.
- Quantification of retinal microvasculature changes, including leucostasis, cell loss, and acellular capillaries.
Main Results:
- trVEGF029 mice were normoglycemic with transient hVEGF upregulation.
- Retinal microvascular changes mimicked DR and showed temporal progression.
- DR-like changes correlated with vascular leakage severity, distinguishing mild and moderate phenotypes.
Conclusions:
- Early, short-term hVEGF elevation can initiate progressive retinopathy.
- The trVEGF029 model replicates key features of DR, facilitating mechanistic studies.
- This model serves as a valuable tool for evaluating novel DR therapeutics.
