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Related Experiment Videos

NK-patterned binding expressed by non-NK mouse leukocytes

G E Piontek, A Grönberg, L Ahrlund-Richter

    International Journal of Cancer
    |August 15, 1982
    PubMed
    Summary

    Natural killer (NK) cells exhibit specific binding patterns to tumor targets, a phenomenon observed even in non-NK leukocytes. This NK-patterned binding is independent of cell lysis and indicates a shared membrane property for NK-binding selectivity.

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    Area of Science:

    • Immunology
    • Cell Biology

    Background:

    • Previous studies showed NK-cell-enriched spleen cells bind selectively to NK-sensitive lymphoma targets.
    • The mechanism and cell types involved in this NK-patterned binding require further investigation.

    Purpose of the Study:

    • To analyze NK-patterned binding using effector cells with varying NK activity.
    • To determine if NK-patterned binding is dependent on cell lysis.
    • To investigate the presence of this binding property in non-NK leukocytes.

    Main Methods:

    • Single-cell target binding assays using NK-active and NK-inactive cells.
    • Cold target competition assays to assess NK-sensitive tumor inhibition.
    • Analysis of binding patterns with non-lytic cell variants, thymocytes, and peritoneal macrophages.

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    Main Results:

    • NK-active cells and a cloned cytotoxic cell line demonstrated NK-patterned binding, correlating with NK sensitivity.
    • Non-lytic variants and thymocytes also exhibited NK-patterned binding, independent of lysis.
    • Peritoneal macrophages showed NK-patterned binding, indicating it is not restricted to T-cell lineage.
    • NK-binding selectivity was observed on various non-NK leukocytes.

    Conclusions:

    • NK-patterned binding is a characteristic of NK cells and occurs independently of cytotoxic activity.
    • The membrane property conferring NK-binding selectivity is present on multiple non-NK leukocyte types.
    • This selectivity is a fundamental feature of leukocyte-target interactions, not exclusive to NK cells.