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A Mouse Model for Laser-induced Choroidal Neovascularization
Published on: December 27, 2015
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Voluntary Exercise Suppresses Choroidal Neovascularization in Mice
Ryan D Makin1,1,1, Dionne Argyle1,1,1, Shuichiro Hirahara1,1
1,.
Investigative Ophthalmology & Visual Science
|May 28, 2020
Summary
Voluntary exercise significantly reduced choroidal neovascularization (CNV) by 41% in mice. Preconditioning with exercise before laser injury is crucial for improving CNV outcomes.
Area of Science:
- Ophthalmology
- Exercise Physiology
- Immunology
Background:
- Choroidal neovascularization (CNV) is a major cause of vision loss.
- Current treatments for CNV have limitations.
- The role of exercise in modulating CNV is not well understood.
Purpose of the Study:
- To investigate the impact of voluntary exercise on the development of choroidal neovascularization (CNV) in a mouse model.
- To determine if preconditioning exercise or exercise post-injury is more effective in reducing CNV.
Main Methods:
- Age-matched wild-type C57BL/6J mice were divided into sedentary and exercise groups with running wheels.
- CNV was induced by laser injury.
- CNV lesion volumes were quantified using confocal microscopy.
- Macrophage abundance and cytokine expression (Vegfa, Ccl2) were analyzed.
Main Results:
- Voluntary exercise significantly reduced CNV lesion volume by 41% (P = 0.0005) compared to sedentary controls.
- Exercise-trained mice showed reduced F4/80+ macrophage infiltration and lower Vegfa and Ccl2 mRNA expression.
- Exercise initiated only after laser injury did not significantly reduce CNV size.
Conclusions:
- Voluntary exercise, particularly with a preconditioning period before injury, effectively reduces choroidal neovascularization in mice.
- Exercise may attenuate CNV by modulating macrophage infiltration and inflammatory cytokine expression.
- These findings highlight the potential of exercise as a therapeutic or preventative strategy for CNV.
