Related Experiment Videos
Bacterial collagenase. Proposed adjunct to vitrectomy with membranectomy
Archives of Ophthalmology (Chicago, Ill. : 1960)
|October 1, 1980
Summary
Clostridiopeptidase A effectively digested preretinal scar tissue in rabbits without harming the retina. Prompt removal via vitrectomy ensured normal retinal function and morphology, suggesting a novel approach for vitrectomy.
Area of Science:
- Ophthalmology
- Enzyme therapy
- Retinal surgery
Background:
- Preretinal scarring can impair vision and complicate vitreoretinal surgery.
- Current surgical techniques for scar removal carry risks of retinal damage.
Purpose of the Study:
- To evaluate the efficacy and safety of Clostridiopeptidase A (collagenase) for digesting preretinal scar tissue.
- To assess the enzyme's impact on retinal structures and function.
Main Methods:
- Enzymatic digestion of preretinal cicatricial tissue in rabbit eyes using purified Clostridiopeptidase A.
- Light and transmission electron microscopy to examine retinal morphology.
- Assessment of retinal function via electroretinograms post-vitrectomy.
Main Results:
- Clostridiopeptidase A digested preretinal scar tissue within 30 minutes without altering normal retinal morphology.
- Enzyme removal by vitrectomy at 48 hours post-injection resulted in normal electroretinograms and retinal structure.
- Prolonged enzyme exposure (24 hours) led to adverse effects including lens opacities and hemorrhage.
Conclusions:
- Purified Clostridiopeptidase A demonstrates specific collagenase activity against vitreal scar tissue.
- This enzyme holds potential as a novel adjunct to vitrectomy for scar removal, minimizing retinal damage.