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Taurine prevents galactose-induced cataracts
J I Malone1, S A Benford, J Malone
1Department of Pediatrics, College of Medicine, University of South Florida, Tampa 33612.
Journal of Diabetes and Its Complications
|January 1, 1993
Summary
Taurine supplementation significantly reduced galactose-induced cataracts in rabbit lenses. This suggests taurine acts as an antioxidant, protecting against sugar cataractogenesis by lowering lipid peroxidation.
Area of Science:
- Ophthalmology
- Biochemistry
- Cell Biology
Background:
- Sugar cataracts are a significant cause of vision impairment.
- Galactosemia can lead to cataract formation due to galactitol accumulation.
- The role of oxidative stress and specific protective molecules in cataractogenesis requires further investigation.
Purpose of the Study:
- To investigate the protective effect of taurine against galactose-induced cataracts in rabbit lenses.
- To explore the relationship between taurine levels, lipid peroxidation, and cataract formation.
Main Methods:
- Intact rabbit lenses were cultured in media with glucose or galactose, with or without taurine.
- Cataract formation was assessed over 72 hours.
- Lens water content, taurine levels, and malondialdehyde (lipid peroxidation indicator) were measured.
Main Results:
- Galactose significantly induced cataracts, while taurine reduced their incidence.
- Lens water content did not differ between cataractous and non-cataractous lenses, ruling out edema as a primary factor.
- Cataractous lenses showed lower taurine and higher malondialdehyde levels, indicating increased lipid peroxidation.
- Taurine levels correlated inversely with malondialdehyde, suggesting an antioxidant role.
Conclusions:
- Taurine demonstrates a protective effect against sugar-induced cataracts.
- This protection is likely mediated by an antioxidant mechanism, reducing lipid peroxidation.
- Taurine may be a potential therapeutic agent for preventing or delaying cataract formation.