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Updated: Jun 2, 2026
09:28
Oxygen-Induced Retinopathy Model for Ischemic Retinal Diseases in Rodents
Published on: September 16, 2020
Choroidal involution is a key component of oxygen-induced retinopathy
Zhuo Shao1, Allison L Dorfman, Swathi Seshadri
1Department of Ophthalmology and Pharmacology, Hôpital Sainte-Justine Research Center, Montreal, Canada.
Investigative Ophthalmology & Visual Science
|May 7, 2011
Summary
Retinopathy of prematurity (ROP) causes vision loss by damaging both retinal and choroidal blood vessels. This study reveals choroidal degeneration in ROP and suggests therapies should focus on preserving these vital choroidal vessels.
Area of Science:
- Ophthalmology
- Vascular Biology
- Developmental Biology
Background:
- Retinopathy of prematurity (ROP) is a leading cause of pediatric visual impairment.
- ROP is traditionally linked to abnormal retinal vascularization.
- Emerging evidence suggests potential involvement of other ocular vascular beds.
Purpose of the Study:
- To investigate the impact of oxygen-induced retinopathy (OIR) on the choroidal vasculature in a rat model.
- To determine if choroidal vascular changes correlate with photoreceptor dysfunction in OIR.
- To explore the role of 15-deoxy-Δ12,14-PGJ(2) (15d-PGJ(2)) in OIR-associated vascular changes.
Main Methods:
- Utilized rat models of OIR mimicking human ROP.
- Employed immunohistology and vascular corrosion casting to analyze ocular vasculature.
- Conducted in vitro and ex vivo studies on choroidal explants and performed intravitreal injections to assess 15d-PGJ(2) effects.
Main Results:
- Demonstrated significant vascular deficiency in both the retinal and choroidal plexuses in OIR models.
- Identified sustained, central choroidal degeneration linked to photoreceptor loss and functional deficits.
- Showed that 15d-PGJ(2) significantly contributes to choroidal vascular decay.
Conclusions:
- Established pronounced and sustained choroidal vascular involution as a key feature in ROP development.
- Highlighted the critical role of choroidal vasculature in ROP pathogenesis.
- Recommended considering choroidal preservation in therapeutic strategies for ROP.
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