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Glucose consumption in cultured corneal cells
C A Zurawski1, B E McCarey, F H Schmidt
1Department of Ophthalmology, Emory University School of Medicine, Atlanta, GA 30322.
Current Eye Research
|April 1, 1989
Summary
Cultured corneal cells, including epithelium, endothelium, and keratocytes, show reduced glucose consumption with lower glucose availability. This study quantifies how glucose levels impact these vital ocular cell types.
Area of Science:
- Ophthalmology
- Cell Biology
- Biochemistry
Background:
- Corneal cells rely on glucose for energy.
- Understanding glucose metabolism is crucial for ocular health and disease management.
Purpose of the Study:
- To measure glucose consumption rates in cultured corneal epithelium, endothelium, and keratocytes.
- To determine the impact of reduced glucose availability on these consumption rates.
Main Methods:
- Incubation of cultured epithelium (EPI), endothelium (ENDO), and keratocytes (K) in Krebs-Ringers solutions with varying glucose concentrations.
- Measurement of glucose consumption rates over time for each cell type.
Main Results:
- All three cell types exhibited asymptotic glucose decrease over time.
- At aqueous-like glucose concentrations, consumption rates were EPI: 6.7, ENDO: 7.4, K: 9.0 µg/cm²/hr.
- A 66% reduction in glucose (90 to 30 mg%) decreased consumption by 74% (EPI), 61% (ENDO), and 44% (K).
Conclusions:
- Corneal cell glucose consumption is directly related to glucose availability.
- Epithelium, endothelium, and keratocytes demonstrate differential sensitivity to glucose reduction.