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The bovine complement system

W D Linscott, R P Triglia

    Advances in Experimental Medicine and Biology
    |January 1, 1981
    PubMed
    Summary

    Researchers developed methods to measure bovine complement system components, finding high levels of some factors in adult serum and low levels in fetal serum. This research aids in understanding bovine immunology and complement function.

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    Area of Science:

    • Immunology
    • Biochemistry
    • Veterinary Science

    Background:

    • The bovine complement system is crucial for immune responses.
    • Quantifying complement components is essential for immunological studies.

    Purpose of the Study:

    • To develop and validate methods for titrating bovine complement components.
    • To compare complement component levels in adult and fetal bovine sera.

    Main Methods:

    • Developed non-hemolytic titration methods for C3b-inactivator, C2, C3, and C4.
    • Utilized hemolytic assays for other classical complement components (except C2).
    • Assessed heat stability of complement components at 56°C.

    Main Results:

    • Established sensitive assays detecting components at high serum dilutions (up to 1:100,000).
    • Adult bovine serum showed high titers for C1, C4, C5, C7, and C9; low for C2 and C8.
    • Fetal bovine serum had significantly lower levels of most components compared to adults, with undetectable C3 functional activity in most samples.

    Conclusions:

    • The developed methods allow for sensitive quantification of bovine complement components.
    • Significant differences exist in complement profiles between adult and fetal bovine sera.
    • Heat lability and inhibitor effects influence complement component stability and assay results.

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