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Related Experiment Videos

Fish lymphocytes respond to human IL-1.

B A Hamby, E M Huggins, L B Lachman

    Lymphokine Research
    |January 1, 1986
    PubMed
    Summary
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    Interleukin-1 (IL-1) from humans can stimulate catfish lymphocytes, demonstrating that IL-1 crosses phylogenetic classes. This finding expands our understanding of immune system communication across diverse species.

    Area of Science:

    • Immunology
    • Comparative immunology
    • Interspecies immune interactions

    Background:

    • Interleukin-1 (IL-1) is known to mediate immune responses and can cross species barriers within mammals.
    • Previous research indicates IL-1's ability to interact across mammalian species.

    Purpose of the Study:

    • To investigate whether Interleukin-1 (IL-1) can cross phylogenetic classes, specifically from human to fish.
    • To determine if human IL-1 can influence the immune cell proliferation in catfish.

    Main Methods:

    • Human peripheral blood lymphocytes (PBL) were used as the source of IL-1.
    • Catfish PBL were isolated using density gradient centrifugation.
    • Blastogenic transformation assays were performed using suboptimal concentrations of the T cell mitogen Concanavalin A (ConA).

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  • Neutralization experiments with anti-human IL-1 antibody were conducted to assess specificity.

    • Main Results:

    • Human IL-1 significantly potentiated the proliferative response of catfish lymphocytes to ConA.
    • Human IL-1 showed minimal direct stimulatory effect on catfish lymphocytes alone.
    • The augmentation of catfish lymphocyte proliferation by human IL-1 was significantly reduced by anti-human IL-1 antibodies, indicating specificity.

    Conclusions:

    • Interleukin-1 (IL-1) can indeed cross phylogenetic boundaries, functioning between human and fish immune cells.
    • This study provides evidence for conserved functions of IL-1 across a wide evolutionary distance.
    • The findings suggest potential for conserved mechanisms in immune signaling pathways across vertebrate classes.