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Gelatinase B in proliferative vitreoretinal disorders
A M Abu El-Asrar1, L Dralands, M Veckeneer
1Department of Ophthalmology, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
American Journal of Ophthalmology
|June 30, 1998
Summary
Gelatinase B, an enzyme linked to extracellular matrix breakdown, is significantly elevated in proliferative diabetic retinopathy. This suggests its crucial role in neovascularization in this condition.
Area of Science:
- Ophthalmology
- Biochemistry
- Pathology
Background:
- Proliferative vitreoretinal disorders involve complex pathological changes in the retina.
- Gelatinases are enzymes that degrade extracellular matrix components, potentially contributing to tissue remodeling.
Purpose of the Study:
- To determine the involvement of gelatinases A and B in the pathogenesis of proliferative vitreoretinal disorders.
- To compare gelatinase levels in patients with different vitreoretinal conditions.
Main Methods:
- Prospective study of 101 patients with various retinal conditions.
- Vitreous and serum samples analyzed using quantitative zymography.
- Patients included those with proliferative vitreoretinopathy, non-proliferative retinal detachment, and proliferative diabetic retinopathy.
Main Results:
- Gelatinase A was consistently detected in vitreous and serum samples.
- Gelatinase B was detected more frequently and at higher levels in vitreous samples from patients with proliferative diabetic retinopathy compared to other groups.
- No detectable gelatinase B activity was found in serum samples.
Conclusions:
- Gelatinase B is significantly associated with proliferative diabetic retinopathy.
- Elevated gelatinase B in the vitreous may contribute to neovascularization and extracellular matrix degradation in proliferative diabetic retinopathy.