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Related Experiment Videos

Circulating antispermatozoa immunoglobulin G in men after vasectomy.

W L Quinlivan, H Sullivan, N Olsher

    Fertility and Sterility
    |March 1, 1975
    PubMed
    Summary

    Vasectomy induces circulating antibodies, specifically immunoglobulin G, that target human spermatozoa, causing immobilization and agglutination. These immune responses were not observed in non-vasectomized men, indicating a vasectomy-specific immunological effect.

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    Area of Science:

    • Immunology
    • Reproductive Biology
    • Urology

    Background:

    • Vasectomy is a common form of male sterilization.
    • The immunological consequences of vasectomy are not fully understood.
    • Previous studies suggest potential immune responses to sperm antigens post-vasectomy.

    Purpose of the Study:

    • To investigate the presence and nature of antibodies against spermatozoa in men following vasectomy.
    • To determine if these antibodies contribute to sperm immobilization and agglutination.
    • To compare immunological markers in vasectomized versus non-vasectomized men.

    Main Methods:

    • Sera analysis from ten vasectomized men and 22 control subjects.
    • Spermatozoa immobilization and agglutination tests.

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  • Passive hemagglutination assays.
  • Isolation and testing of Immunoglobulin G (IgG) fraction from sera.

    • Main Results:

    • Sera from vasectomized men induced significant spermatozoa immobilization and agglutination.
    • Positive passive hemagglutination tests were observed in vasectomized individuals.
    • Immunoglobulin G (IgG) isolated from vasectomized men's sera replicated these effects.
    • Control group (non-vasectomized men) showed no such immune reactions.

    Conclusions:

    • Vasectomy elicits a circulating antibody response, primarily Immunoglobulin G (IgG), directed against spermatozoa.
    • These antibodies appear to be responsible for the observed sperm immobilization and agglutination.
    • The findings suggest a specific immunological consequence of vasectomy affecting sperm function.