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Diminished bacterial defences with intralipid.

G W Fischer, K W Hunter, S R Wilson

    Lancet (London, England)
    |October 18, 1980
    PubMed
    Summary
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    Intralipid, a lipid emulsion, was found to worsen bacterial infections in mice by hindering immune cell function. This suggests Intralipid may increase the risk of sepsis in patients.

    Area of Science:

    • Immunology
    • Microbiology
    • Nutritional Science

    Background:

    • Parenteral nutrition often utilizes lipid emulsions like Intralipid.
    • The impact of Intralipid on host-pathogen interactions requires further elucidation.
    • Neutrophil function is critical for combating bacterial infections.

    Purpose of the Study:

    • To investigate the effect of Intralipid on bacterial clearance and virulence.
    • To assess the in vitro impact of Intralipid on human neutrophil chemotaxis.
    • To determine the potential clinical implications of Intralipid in bacterial sepsis.

    Main Methods:

    • Animal models were used to study bacterial clearance and virulence following Intralipid administration.
    • In vitro assays were performed to measure human neutrophil chemotaxis in the presence of Intralipid.

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  • Statistical analyses were employed to evaluate the significance of observed effects.

    • Main Results:

    • Intralipid administration impaired the host's ability to clear bacteria in a murine model.
    • Bacterial virulence was enhanced in the presence of Intralipid.
    • Human neutrophil chemotaxis was significantly inhibited by Intralipid in vitro.

    Conclusions:

    • Intralipid negatively impacts key components of the innate immune system.
    • The findings suggest a potential mechanism by which Intralipid may increase sepsis risk.
    • Clinical monitoring for infection may be warranted in patients receiving Intralipid.