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Related Experiment Videos

A permeability test for acute corneal toxicity.

D Maurice, T Singh

    Toxicology Letters
    |May 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a new method using sulforhodamine B (SRB) penetration in mouse corneas to measure acute corneal toxicity. This technique offers a reliable index for assessing chemical damage to the corneal epithelium.

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    Area of Science:

    • Ophthalmology
    • Toxicology
    • Corneal Research

    Background:

    • Assessing corneal toxicity is crucial for eye safety.
    • Existing methods may not accurately reflect acute epithelial damage.
    • A sensitive and quantitative assay is needed for corneal toxicity testing.

    Purpose of the Study:

    • To develop and validate a novel in vivo method for quantifying acute corneal epithelial toxicity.
    • To establish a numerical index for corneal toxicity based on dye penetration.
    • To correlate this index with known toxic substances.

    Main Methods:

    • Measuring sulforhodamine B (SRB) penetration into mouse corneas after exposure to test substances.
    • Utilizing a paired-eye design in freshly killed mice.

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  • Calculating a ratio of SRB penetration as an index of corneal toxicity.

    • Main Results:

    • The SRB penetration ratio serves as a reliable index of acute corneal epithelial toxicity.
    • A 50% increase in the index is detectable with 6 animals at a 95% confidence level.
    • Sodium hydroxide (NaOH) and benzalkonium chloride (BAK) produced dose-dependent increases in the toxicity index, correlating with observed ocular injury.

    Conclusions:

    • The SRB penetration assay provides a sensitive and quantitative measure of acute corneal toxicity.
    • This method can effectively distinguish and quantify chemical-induced damage to the corneal epithelium.
    • The findings support the use of this assay in toxicological assessments of ocular substances.