Localization of the terminal C5b-9 complement complex in the human aortic atherosclerotic wall

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Quantitative Analysis and Characterization of Atherosclerotic Lesions in the Murine Aortic Sinus
06:43

Quantitative Analysis and Characterization of Atherosclerotic Lesions in the Murine Aortic Sinus

Published on: December 7, 2013

F Niculescu, H Rus, A Cristea

    Immunology Letters
    |January 1, 1985
    PubMed

    Insights

    The terminal C5b-9 complement complex was found in fibrous plaques, suggesting its role in atherosclerosis progression. Fatty streaks lacked these deposits, indicating C5b-9 is specific to advanced lesions.

    Area of Science:

    • Immunology
    • Cardiovascular Pathology
    • Atherosclerosis Research

    Background:

    • Atherosclerosis involves complex inflammatory processes.
    • The role of the complement system in lesion development is not fully understood.

    Purpose of the Study:

    • To investigate the presence and localization of the terminal C5b-9 complement complex in human atherosclerotic plaques.
    • To determine if C5b-9 deposition correlates with plaque morphology and other immune markers.

    Main Methods:

    • Indirect immunofluorescence and immunoperoxidase staining were used.
    • Analysis was performed on aortic fibrous plaques and fatty streaks.

    Main Results:

    • Terminal C5b-9 deposits were identified in fibrous plaques, often associated with IgG, IgA, IgM, Clq, C3c, and C4.
    • Fatty streaks showed no detectable C5b-9 or complement component deposits.

    Conclusions:

    • The presence of assembled C5b-9 in fibrous plaques suggests complement activation is involved in atherosclerotic lesion progression.
    • C5b-9 deposition is specific to more advanced atherosclerotic lesions, unlike early fatty streaks.

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