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Related Experiment Videos

Cord factor not toxic in rats.

R Saito, A Tanaka, K Sugiyama

    The American Review of Respiratory Disease
    |October 1, 1975
    PubMed
    Summary

    Cord factor, a toxic substance, caused severe illness and death in mice but was tolerated by rats. This highlights significant species-specific differences in cord factor toxicity.

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    Area of Science:

    • Immunology
    • Toxicology
    • Comparative Medicine

    Background:

    • Cord factor is a virulence factor produced by Mycobacterium tuberculosis.
    • Understanding its toxicity is crucial for developing effective treatments and vaccines.
    • Species-specific responses to toxins can impact preclinical research.

    Purpose of the Study:

    • To compare the systemic toxicity and local inflammatory effects of cord factor in mice and rats.
    • To identify potential species-specific differences in cord factor's biological activity.

    Main Methods:

    • Mice and rats were administered cord factor via intraperitoneal injection.
    • Systemic toxicity was assessed by monitoring general condition and mortality.
    • Local inflammatory activity was evaluated by measuring footpad swelling.

    Main Results:

    • Mice exhibited severe systemic toxicity, including poor general condition and high mortality.
    • Mice showed significant local inflammation, indicated by marked footpad swelling.
    • Rats did not display significant toxic reactions, with only ascites accumulation observed after high-dose, repeated injections.

    Conclusions:

    • Cord factor demonstrates marked species-specific toxicity, with mice being highly susceptible compared to rats.
    • These findings are critical for interpreting preclinical studies involving cord factor and related mycobacterial components.
    • Rats may serve as a more suitable model for studying certain aspects of cord factor's effects due to their lower susceptibility.

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