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Corneal changes in magnesium-deficient rats
Huaqing Gong1, Yumiko Takami, Takashi Kitaoka
1Department of Ophlamology and Visual Sciences, Nagasaki Univerity School of Medicine, Japan. hgong@net.nagasaki-u.ac.jp
Cornea
|June 27, 2003
Summary
Magnesium (Mg) deficiency in rats alters corneal structure, affecting epithelial cells and leading to abnormal endothelial cells. This highlights magnesium
Area of Science:
- Ophthalmology
- Nutritional Science
- Cell Biology
Background:
- Magnesium (Mg) is crucial for cellular functions, including structural stabilization.
- The role of trace elements like Mg in corneal health is not fully understood.
- Mg deficiency can impact various physiological processes.
Purpose of the Study:
- To investigate the effects of magnesium deficiency on rat corneas.
- To elucidate the local function of trace elements in corneal integrity.
Main Methods:
- Wistar Kyoto rats were fed a low-Mg diet (0.1 mg Mg/100 g) from birth.
- Control rats received a standard diet with adequate Mg (24 mg Mg/100 g).
- Corneal tissues were analyzed using electron microscopy at 6 weeks of age.
Main Results:
- Mg-deficient rats exhibited lower serum Mg and higher calcium levels.
- Corneal epithelium showed reduced microvilli/microplicae and abnormal mitochondria.
- Nuclei in basal epithelial cells had condensed chromatin; stromal subepithelium contained deposits and macrophages.
- Endothelial cells in Mg-deficient rats were abnormally shaped (pentagonal, square).
Conclusions:
- Mg deficiency induces significant structural changes in corneal epithelial and endothelial cells.
- These corneal alterations may compromise the eye's protective functions.
- Magnesium is essential for maintaining normal corneal structure and function.