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Acute phase response in infectious disease.

J Gauldie, L Lamontagne, A Stadnyk

    Survey and Synthesis of Pathology Research
    |January 1, 1985
    PubMed
    Summary

    Infectious diseases trigger inflammation, a key host response. Pathogen type influences inflammation and acute phase protein changes, mediated by immune cells like macrophages.

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    Area of Science:

    • Immunology
    • Pathology
    • Biochemistry

    Background:

    • Inflammation is the primary host response to infectious diseases.
    • The type of pathogen (bacteria, viruses, parasites) dictates the inflammatory response and associated plasma protein changes.
    • Macrophages and monocytes play a central role in initiating and modulating the acute phase reaction.

    Purpose of the Study:

    • To elucidate the mechanisms of inflammation and acute phase protein response in infectious diseases.
    • To clarify the role of different pathogens in activating immune cells and inducing acute phase reactions.
    • To investigate the impact of acute phase proteins on host-parasite interactions and immune responses.

    Main Methods:

    • Review of existing literature on host responses to infectious agents.
    • Analysis of inflammatory pathways and immune cell activation (monocytes, macrophages).
    • Examination of cytokine signaling (e.g., interleukin-1, hepatocyte-stimulating factor) and its effect on hepatocytes.

    Main Results:

    • Bacteria typically induce classical inflammation and acute phase protein changes.
    • Viruses, without cytopathology, may evade acute phase protein induction by not activating macrophages.
    • Parasites induce acute phase responses mainly when causing tissue damage and inflammation.

    Conclusions:

    • Macrophage activation by pathogens is crucial for initiating the acute phase reaction via cytokine release.
    • Acute phase proteins influence inflammation, immune function, and host-parasite interactions.
    • Variations in the acute phase reaction may explain differential susceptibility to infections and host defense efficacy.

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