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Related Experiment Videos

In vitro sensitization to embryonic antigens

K Friend, I Hellström, K E Hellström

    International Journal of Cancer
    |December 15, 1976
    PubMed
    Summary

    Lymphoid cells from virgin mice show specific cytotoxicity against tumor cells, while multiparous mice display broader immune responses. This research explores immune reactions to shared antigens between tumor and embryonic cells.

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    Area of Science:

    • Immunology
    • Cancer Research
    • Developmental Biology

    Background:

    • Neoplastic cells can share antigens with normal embryonic cells.
    • Immune responses to tumor-associated antigens are crucial for cancer immunity.
    • Understanding the specificity of immune reactions is key to developing effective cancer therapies.

    Purpose of the Study:

    • To investigate the cytotoxic activity of lymphoid cells from virgin and multiparous mice against tumor and normal cells.
    • To determine the specificity of primary and secondary immune responses to antigens shared by neoplastic and embryonic cells.
    • To explore the influence of culture conditions and cell types on lymphoid cell cytotoxicity.

    Main Methods:

    • Microcytotoxicity assay was used to assess the cytotoxic activity of lymphoid cells.
    • Lymphoid cells were cultured with syngeneic mouse embryo fibroblasts (MEF) or a methylcholanthrene-induced sarcoma cell line (1315).
    • Target cells included 1315 tumor cells, MEF of various developmental stages, and adult skin fibroblasts.

    Main Results:

    • Lymphoid cells from virgin mice exhibited cytotoxicity towards 1315 tumor cells but not normal fibroblasts.
    • Lymphoid cells from multiparous mice showed broader cytotoxicity, targeting tumor cells and, in some cases, MEF and skin fibroblasts.
    • Cytotoxicity varied depending on the developmental stage of MEF used for lymphoid cell culture.

    Conclusions:

    • Lymphoid cells can mediate both primary and secondary immune reactions in vitro against antigens shared by neoplastic and normal embryonic cells.
    • Primary immune reactions appear more specific to embryonic tumor antigens than secondary reactions.
    • The parity of the mouse influences the specificity and breadth of the immune response to tumor-associated antigens.

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