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Apoptotic cell death in rabbit lens after lens extraction
K Kato1, D Kurosaka, T Nagamoto
1Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan.
Investigative Ophthalmology & Visual Science
|October 31, 1997
Summary
Apoptosis and necrosis of lens epithelial cells occur after lens extraction, contributing to secondary cataract formation during wound healing. Understanding these processes may help prevent reepithelialization and delay cataract development.
Area of Science:
- Ophthalmology
- Cell Biology
- Surgical Research
Background:
- Lens extraction is a common surgical procedure.
- Secondary cataracts can develop after lens extraction, impacting visual outcomes.
Purpose of the Study:
- To investigate the occurrence of apoptosis and necrosis in lens epithelial cells following lens extraction in a rabbit model.
Main Methods:
- Lens extraction was performed on 24 rabbit eyes.
- Terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) and transmission electron microscopy were used to analyze cell death.
- Samples were analyzed 1 to 10 days post-surgery.
Main Results:
- Necrotic lens epithelial cells were observed by day 2 in the intracapsular region.
- Apoptotic and necrotic cells appeared by day 5 in the adhesive region, including myofibroblast-like cells.
- Lens epithelial cells on the posterior capsule showed necrotic changes and diminished by days 8-9.
Conclusions:
- Apoptosis of lens epithelial cells is implicated in wound healing and reepithelialization post-lens extraction, contributing to secondary cataracts.
- Further understanding of apoptosis induction could lead to strategies to prevent reepithelialization and delay secondary cataract formation.