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Immunosuppression by human seminal plasma.

S Saxena, P Jha, A Farooq

    Immunological Investigations
    |June 1, 1985
    PubMed
    Summary
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    Human seminal plasma exhibits immunosuppressive properties affecting T-cell mediated immunity. This seminal immunosuppression is not linked to sperm count or protein levels in donors.

    Area of Science:

    • Immunology
    • Reproductive Biology

    Background:

    • Normal human seminal plasma possesses immunosuppressive characteristics.
    • These properties impact various in vitro immune responses, including lymphocyte blastogenesis and rosette formation.

    Purpose of the Study:

    • To investigate the immunosuppressive properties of human seminal plasma.
    • To determine if seminal immunosuppression correlates with sperm density or seminal plasma protein content.
    • To explore potential implications in acquired immunodeficiency syndrome.

    Main Methods:

    • Assessed in vitro immune parameters: lymphocyte blast transformation (PHA, ConA, LPS), E & EAC rosette formation, and mixed lymphocyte culture.
    • Analyzed semen samples from 86 donors with varying sperm counts (azoospermic, oligospermic, normospermic, polyspermic).

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  • Correlated seminal plasma immunosuppression with sperm density and protein concentration.

    • Main Results:

    • Human seminal plasma demonstrated immunosuppressive effects on multiple in vitro immune parameters.
    • The observed immunosuppression appears to be mediated by T-cells.
    • No correlation was found between seminal plasma immunosuppression and sperm density or protein content across donor groups.

    Conclusions:

    • Human seminal plasma has significant immunosuppressive activity, primarily T-cell mediated.
    • Seminal immunosuppression is independent of sperm density and seminal plasma protein levels.
    • The role of seminal immunosuppression in the context of acquired immunodeficiency syndrome warrants further investigation.