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Related Experiment Videos

Measles infection. Involvement of the complement system

J A Charlesworth, B A Pussell, L P Roy

    Clinical and Experimental Immunology
    |June 1, 1976
    PubMed
    Summary

    Measles infection can trigger pathological complement system activation, potentially via classical or alternative pathways. Abnormal complement patterns suggest the presence of circulating immune complexes in many patients.

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    Area of Science:

    • Immunology
    • Virology
    • Pediatrics

    Background:

    • The complement system is a crucial part of innate immunity.
    • Measles is a highly contagious viral illness, primarily affecting children.
    • Complement activation plays a role in immune responses to viral infections.

    Purpose of the Study:

    • To investigate complement system activation in patients with acute measles.
    • To determine the pathways involved in complement activation during measles infection.
    • To explore the potential link between complement abnormalities and immune complexes in measles.

    Main Methods:

    • Serum samples were collected from fifty patients with acute measles.
    • Complement activation pathways (classical and alternative) were assessed.

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  • Levels of complement components and C3 splitting activity were measured.
  • Presence of immune complexes was evaluated.

    • Main Results:

    • Twenty out of fifty measles patients showed evidence of pathological complement activation.
    • Thirteen patients exhibited patterns consistent with classical pathway activation.
    • Seven patients showed signs of alternative pathway utilization.
    • Eleven patients had isolated C1q reduction, excluded from classical pathway analysis.
    • No detectable immune complexes or C3 splitting activity were found in serum.

    Conclusions:

    • Measles can lead to significant complement system activation.
    • Both classical and alternative complement pathways may be involved.
    • Observed complement abnormalities likely indicate the presence of circulating immune complexes in a high percentage of measles patients.
    • Further research is needed to confirm the presence and significance of immune complexes in measles.