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Related Experiment Videos

Clioquinol toxicity in the dog.

A N Worden, R Heywood, D E Prentice

    Toxicology
    |March 1, 1978
    PubMed
    Summary

    Acute halogenated oxyquinoline intoxication can cause severe symptoms and death in some species. In dogs, repeated clioquinol doses led to neurological damage, suggesting absorption, not just dose, drives toxicity.

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    Area of Science:

    • Toxicology
    • Neuroscience
    • Pharmacology

    Background:

    • Halogenated oxyquinolines are associated with acute intoxication, including convulsions and mortality in certain species.
    • Clioquinol, a halogenated oxyquinoline, has been previously investigated for its toxic effects.

    Purpose of the Study:

    • To investigate the toxicity of repeated clioquinol doses in dogs.
    • To characterize the clinical syndrome and neurological effects induced by clioquinol in dogs.

    Main Methods:

    • Repeated administration of clioquinol to dogs.
    • Clinical observation and assessment of neurological function.
    • Histopathological examination of nervous tissues.

    Main Results:

    • Repeated clioquinol dosing induced anorexia, weight loss, muscle weakness, and emaciation in dogs.
    • Neuropathy of the central nervous system, but not peripheral nerves, was observed in surviving animals.
    • Toxicological manifestations appeared to correlate more with the degree of absorption than the dose level.

    Conclusions:

    • Repeated clioquinol administration in dogs causes a distinct clinical syndrome with central nervous system neuropathy.
    • The absorption of clioquinol is a critical factor in the development of its toxic effects.
    • Further research is needed to elucidate the specific etiology of the observed lesions.

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