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Related Experiment Videos

Polychlorinated biphenyls poisoning in monkey eye.

Y Ohnishi, T Kohno

    Investigative Ophthalmology & Visual Science
    |September 1, 1979
    PubMed
    Summary

    Polychlorinated biphenyl (PCB) poisoning in humans causes skin and eye issues. A key sign is a white, cheesy discharge from the Meibomian gland duct when the eyelid is squeezed.

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    Area of Science:

    • Toxicology
    • Ophthalmology
    • Dermatology

    Background:

    • Polychlorinated biphenyls (PCBs) are environmental toxins known to cause adverse health effects.
    • Cutaneous and ocular manifestations are recognized consequences of human PCB exposure.
    • Meibomian gland dysfunction is a potential indicator of systemic toxicity.

    Purpose of the Study:

    • To identify specific ocular signs associated with polychlorinated biphenyl (PCB) poisoning in humans.
    • To investigate the histopathological changes in the Meibomian gland ductal epithelium in a relevant animal model.

    Main Methods:

    • Clinical observation of human patients with suspected PCB poisoning.
    • Histopathological examination of Meibomian gland ductal epithelium from rhesus monkeys exposed to PCBs.

    Main Results:

    • A characteristic white, cheesy secretion from the Meibomian gland duct orifice was observed in humans.
    • Histopathology revealed abnormal hyperkeratosis of the ductal epithelium in rhesus monkeys.

    Conclusions:

    • The Meibomian gland secretion is a potential clinical sign of PCB intoxication in humans.
    • Hyperkeratosis of the Meibomian gland ductal epithelium may be a contributing factor to the observed secretion.

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