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Vitamin E inhibits proliferation of human Tenon's capsule fibroblasts in vitro
A L Haas1, D Boscoboinik, D S Mojon
1University Eye Clinic, Inselspital, Bern, Switzerland.
Abstract:
Failure of glaucoma surgery is mostly due to fibrocellular scar formation, derived from Tenon's capsule fibroblasts. In high-risk cases, postoperative Tenon's capsule fibroblast proliferation is inhibited by mitomycin C or 5-fluorouracil. Toxicity to other ocular cell types and the risk of ocular hypotony limits the use of these agents. We have found that d-alpha-tocopherol (vitamin E) was able to inhibit proliferation of in vitro human Tenon's capsule fibroblasts obtained from seven different donors. At 48 h, inhibition of cell proliferation was 30-78% (mean 60%) for 50 microM d-alpha-tocopherol and 46-97% (mean 77%) for 100 microM d-alpha-tocopherol. This inhibition was statistically significant. No cytotoxic effects were observed.
Insights
Vitamin E (d-alpha-tocopherol) effectively inhibits human Tenon's capsule fibroblast proliferation, a key factor in glaucoma surgery failure. This finding suggests vitamin E as a potential safer alternative to current anti-scarring agents.
Area of Science:
- Ophthalmology
- Cell Biology
- Surgical Research
Background:
- Glaucoma surgery failure is frequently caused by fibrocellular scar formation originating from Tenon's capsule fibroblasts.
- Current treatments like mitomycin C and 5-fluorouracil inhibit fibroblast proliferation but have toxicity concerns and risks of ocular hypotony.
Purpose of the Study:
- To investigate the potential of d-alpha-tocopherol (vitamin E) to inhibit the proliferation of human Tenon's capsule fibroblasts in vitro.
- To assess the safety and efficacy of vitamin E as a potential anti-scarring agent in glaucoma surgery.
Main Methods:
- Human Tenon's capsule fibroblasts from seven different donors were cultured in vitro.
- Cells were treated with varying concentrations of d-alpha-tocopherol (50 microM and 100 microM).
- Cell proliferation was measured after 48 hours, and cytotoxicity was assessed.
Main Results:
- d-alpha-tocopherol significantly inhibited human Tenon's capsule fibroblast proliferation in a dose-dependent manner.
- At 50 microM, inhibition ranged from 30-78% (mean 60%); at 100 microM, inhibition ranged from 46-97% (mean 77%).
- No cytotoxic effects were observed at the tested concentrations.
Conclusions:
- d-alpha-tocopherol demonstrates potent anti-proliferative effects on human Tenon's capsule fibroblasts.
- Vitamin E represents a promising, non-toxic alternative for preventing scar formation in glaucoma surgery.
- Further research is warranted to explore its clinical application in ophthalmic surgery.