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Cysteamine Prevents the Development of Lens Opacity in a Rat Model of Selenite-Induced Cataract
Cited 16 time in
Web of Science
Cited 19 time in Scopus
- Authors
- Issue Date
- 2012-03
- Citation
- Investigative Ophthalmology and Visual Science, Vol.53 No.3, pp.1452-1459
- Abstract
- PURPOSE. The activation of transglutaminase 2 (TG2) by oxidative stress through TGF beta has been reported to play a crucial role in cataract formation. The authors investigated whether TG2 is involved in selenite-induced cataract formation in rats and whether cysteamine, a chemical inhibitor of TG2, can prevent cataract formation in this model. METHODS. Intracellular TG2 activity was monitored in a human lens epithelial cell (HLE-B3) line and cultured rat lenses after treatment with selenite. Rat pups (13 days old) were injected subcutaneously with sodium selenite (Na2SeO3; 20 mu mol/kg) and intraperitoneally with cysteamine (30, 40, and 60 mg/kg) for 14 days. Lenses were evaluated photographically at days 7 and 14. The concentrations of malondialdehyde and glutathione in the lenses were determined. RESULTS. In HLE-B3 cells or rat lenses, selenite induced intracellular TG activity, which was inhibited by cysteamine. In selenite-treated rats, the rate of cataract formation was significantly reduced by cysteamine (P < 0.001). The mean cataract area in the lenses of cysteamine-treated rats was smaller than that of control rats (P < 0.01). The levels of total and reduced glutathione in the lenses of cysteamine-treated rats extracted at day 14 were higher than those of control rats. CONCLUSIONS. Cysteamine suppresses cataract formation induced by selenite in rats, suggesting that cysteamine can be used as a pharmaceutical intervention to prevent or delay cataract formation. (Invest Ophthalmol Vis Sci. 2012;53:1452-1459) DOI:10.1167/iovs.11-8636
- ISSN
- 0146-0404
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