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Lens calcium and selenite-induced cataract
Current Eye Research
|February 1, 1984
Summary
Sodium selenite injection in rats rapidly causes nuclear cataracts. This eye condition is linked to increased lens calcium and phosphate levels, and weakened cell adhesion.
Area of Science:
- Ophthalmology
- Toxicology
- Cell Biology
Background:
- Cataracts are a leading cause of blindness.
- Understanding the molecular mechanisms of cataract formation is crucial for developing effective treatments.
- Sodium selenite is a chemical compound with known toxicological effects.
Purpose of the Study:
- To investigate the effects of sodium selenite on the lens.
- To determine the biochemical and structural changes associated with selenite-induced cataracts.
- To elucidate the early events leading to cataract formation.
Main Methods:
- Subcutaneous injection of sodium selenite in young rats.
- Biochemical analysis of lens calcium and inorganic phosphate levels.
- Scanning electron microscopy of cataractous lens tissue.
Main Results:
- Sodium selenite induced nuclear cataracts in rats within 72 hours.
- A three-fold increase in lens calcium and a two-fold increase in lens inorganic phosphate were observed prior to cataract formation.
- Scanning electron microscopy revealed weakened cell-to-cell adhesion in the nuclear cataractous zone.
Conclusions:
- Sodium selenite is a potent inducer of rapid cataract formation in rats.
- Elevated lens calcium and inorganic phosphate are early biochemical markers of selenite-induced cataracts.
- Compromised cell-to-cell adhesion may play a significant role in the pathogenesis of selenite-induced nuclear cataracts.