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Related Experiment Videos

Polyphosphate-mediated protection from cellular intoxication with Clostridium difficile toxin B.

I Florin, M Thelestam

    Biochimica Et Biophysica Acta
    |October 12, 1984
    PubMed
    Summary

    Polyphosphorylated compounds, including ATP, delay Clostridium difficile toxin B

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    Area of Science:

    • Microbiology
    • Cell Biology
    • Toxicology

    Background:

    • Clostridium difficile toxin B causes cell damage.
    • Understanding toxin B's cellular interactions is crucial.

    Purpose of the Study:

    • To investigate the effect of polyphosphorylated compounds on C. difficile toxin B-induced cell damage.
    • To elucidate the mechanism of protection offered by ATP.

    Main Methods:

    • Incubation of human lung fibroblasts with C. difficile toxin B.
    • Addition of various polyphosphorylated compounds (ATP, nucleoside phosphates, polyphosphates, polyphosphorylated sugars) at different concentrations and time points.
    • Assessment of cytopathogenic effect and toxin-cell interactions.

    Main Results:

    • Polyphosphorylated compounds, notably ATP, dose-dependently delayed toxin B's cytopathogenic effect.
    • The protective effect was independent of ATP's energy production, toxin inactivation, or initial toxin binding.
    • ATP protected cells even when added post-toxin binding, and toxin remained neutralizable by antitoxin.

    Conclusions:

    • C. difficile toxin B likely possesses a polyphosphate-binding site distinct from the receptor-binding site.
    • This polyphosphate-binding site is involved in post-binding cellular interactions.
    • Polyphosphorylated compounds may offer a novel therapeutic strategy against C. difficile toxin B.

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