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Anomalous acute inflammatory response in rabbit corneal stroma
J W Ruberti1, S D Klyce, M K Smolek
1Department of Biomedical Engineering, Tulane University, New Orleans, USA. j-ruberti@nwu.edu
Investigative Ophthalmology & Visual Science
|August 11, 2000
Summary
Acute corneal stromal edema after epithelial debridement is linked to inflammatory pathways. Nonsteroidal anti-inflammatory drugs (NSAIDs) significantly reduced this swelling, suggesting a role for the cyclooxygenase pathway in this response.
Area of Science:
- Ophthalmology
- Corneal Physiology
- Inflammation Research
Background:
- Epithelial debridement can induce corneal stromal edema.
- The precise mechanisms and mediators of this acute swelling remain unclear.
Purpose of the Study:
- To investigate the nature and cause of acute stromal edema following epithelial debridement in rabbit corneas.
- To determine the role of inflammatory pathways in this edema response.
Main Methods:
- Rabbit corneas were subjected to epithelial debridement using either a scalpel or a rotating brush.
- Stromal swelling was measured in vitro using specular microscopy.
- The effect of diclofenac sodium (a nonsteroidal anti-inflammatory drug) on swelling was evaluated.
Main Results:
- Epithelial debridement caused significant and rapid stromal swelling, particularly in the anterior stroma.
- The observed swelling pattern suggests increased anterior swelling or osmotic pressure, not altered endothelial function.
- Diclofenac sodium pretreatment significantly reduced the post-debridement stromal swelling.
Conclusions:
- Acute stromal edema post-epithelial injury involves messenger/enzymatic activity, potentially similar to apoptosis.
- The cyclooxygenase pathway is implicated due to NSAID efficacy in reducing swelling.
- This edema mechanism may be a general inflammatory response for cell mobilization.