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Related Experiment Videos

Does the number of cells in the cornea decrease with age? A biochemical study.

H R Liao, S M Hasany, P K Basu

    Canadian Journal of Ophthalmology. Journal Canadien D'Ophtalmologie
    |April 1, 1979
    PubMed
    Summary
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    Corneal cellularity decreases with age. Biochemical analysis of guinea pig corneas revealed less DNA, indicating fewer cells in older animals, suggesting age-related acellularity in the cornea.

    Area of Science:

    • Ophthalmology
    • Biochemistry
    • Gerontology

    Background:

    • The aging process can affect tissue composition and cellularity.
    • Understanding age-related changes in the cornea is crucial for ocular health research.

    Purpose of the Study:

    • To investigate whether the cornea becomes more acellular with increasing age.
    • To quantify age-related cellular content changes in the cornea.

    Main Methods:

    • Biochemical techniques were employed to assess DNA content.
    • Corneal buttons from guinea pigs of varying body weights (age) were analyzed.
    • DNA content per corneal disc was measured and compared to DNA content per diploid cell.

    Main Results:

    • A decrease in DNA content per corneal disc was observed as animal body weight (age) increased.

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  • This reduction in DNA content directly correlates with a reduced total cellular content in the aging cornea.

    • Conclusions:

    • The cornea exhibits a reduction in cellularity with advancing age.
    • Age-related acellularity is a characteristic of the cornea, as evidenced by decreased DNA content.