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Dietary restriction retards age-related decrease in cell population of rat corneal endothelium.

M J Nadakavukaren, K L Fitch, A Richardson

    Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.)
    |January 1, 1987
    PubMed
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    Calorie restriction in aging rats significantly reduced corneal endothelial cell size. This dietary intervention appears to slow age-related cell loss and enlargement, a novel finding in aging research.

    Area of Science:

    • Ophthalmology
    • Gerontology
    • Cell Biology

    Background:

    • Corneal endothelial cells (CECs) undergo age-related changes, including cell loss and compensatory enlargement.
    • Understanding factors influencing these age-related changes is crucial for maintaining ocular health.
    • Dietary interventions are increasingly explored for their impact on aging processes.

    Purpose of the Study:

    • To investigate the effect of calorie restriction on the surface area of corneal endothelial cells in aging Fischer 344 rats.
    • To determine if dietary restriction influences age-related changes in CECs.

    Main Methods:

    • Comparison of corneal endothelial cell surface areas in 12- and 18-month-old male Fischer 344 rats.
    • Two dietary groups were studied: ad libitum feeding and calorie-restricted feeding.

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    Main Results:

    • Calorie-restricted rats in both age groups exhibited a statistically significant reduction in mean corneal endothelial cell area.
    • Dietary restriction was associated with smaller CECs compared to ad libitum fed rats.

    Conclusions:

    • Dietary restriction retards the age-related loss of corneal endothelial cells.
    • Calorie restriction appears to prevent the compensatory enlargement of remaining CECs in aging rats.
    • This study provides the first evidence that dietary restriction mitigates age-related CEC loss.