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Zinc and bacterial adherence.

B Sugarman, L R Epps, W A Stenback

    Infection and Immunity
    |September 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Zinc boosts bacterial attachment to host cells by binding to pili, enhancing bacterial virulence. This effect depends on zinc concentration and bacterial piliation, not bacterial viability.

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    Area of Science:

    • Microbiology
    • Bacterial Adherence
    • Virulence Factors

    Background:

    • Bacterial attachment to host cells is crucial for infection.
    • Pili (protein appendages) mediate bacterial adhesion.
    • The role of metal ions, like zinc, in bacterial adherence is not fully understood.

    Purpose of the Study:

    • To investigate the effect of zinc on bacterial attachment to eukaryotic cells.
    • To determine the relationship between zinc concentration, bacterial piliation, and adherence.
    • To explore the mechanism by which zinc influences bacterial adherence.

    Main Methods:

    • Assessing the adherence of piliated and unpiliated Gram-negative and Gram-positive bacteria to HeLa cells in the presence of varying zinc concentrations.
    • Evaluating the effect of bacterial viability and sulfhydryl blockers on zinc-mediated adherence.

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    Main Results:

    • Zinc significantly enhanced the adherence of piliated bacteria (both Gram-negative and Gram-positive) to HeLa cells.
    • The adherence-enhancing effect of zinc was dose-dependent and correlated with the degree of bacterial piliation.
    • Zinc-mediated adherence occurred even with non-viable bacteria and was partially inhibited by sulfhydryl blockers.

    Conclusions:

    • Zinc acts as a virulence factor by augmenting bacterial pili-mediated adherence to host cells.
    • Zinc likely binds to bacterial pili, increasing their affinity for host cell surfaces.
    • These findings highlight a novel mechanism of bacterial pathogenesis involving host-pathogen interactions modulated by metal ions.