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    Involvement of cell surface macromolecules sensitive to alkylating ketones in lysis by human peripheral blood NK cells.

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    Authors
    Dawson, Maureen M
    Shipton, Ursula
    Moore, Michael
    Affiliation
    Immunology, Paterson Laboratories, Chistie Hospital and Holt Radium Institute, Manchester, M20 9BX, UK.
    Issue Date
    1985-01
    
    Metadata
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    Abstract
    Natural cytotoxicity (mediated by the B73.1+ subset) of human peripheral blood lymphocytes against the K-562 erythroleukaemia cell line is dramatically inhibited in a dose-dependent manner, by the small molecular weight protease inhibitors, tosyl-L-lysyl chloromethyl ketone (TLCK) and tosylamide phenyl-ethyl-chloromethyl-ketone (TPCK), incorporated into the cytotoxicity assay or after brief effector cell (but not target cell) pre-treatment. The alkylating ketones primarily affect post-binding events in the lytic process by interference with cellular functions dependent upon protein synthesis. Although non-toxic under the conditions used, recovery of cytolytic function requires at least 72 h, implicating involvement of protein(s) with a minimum turnover time of 3 days. Protection of effector cell function from TLCK by prior treatment with the lectin Lens culinaris (lentil) agglutinin, which binds human peripheral blood lymphocytes to a three-fold greater extent than concanavalin A, indicated that the initial action of the agent is with cell surface rather than intracytoplasmic components. The data suggest that the alkylating ketones inhibit natural killer function by slowly reversible functional inactivation of cell-surface protease(s), which although not cytotoxic per se, may control the secretion of soluble lytic factors.
    Citation
    Involvement of cell surface macromolecules sensitive to alkylating ketones in lysis by human peripheral blood NK cells. 1985, 59 (1):91-100 Clin Exp Immunol
    Journal
    Clinical and Experimental Immunology
    URI
    http://hdl.handle.net/10541/117167
    PubMed ID
    3971601
    Type
    Article
    Language
    en
    ISSN
    0009-9104
    Collections
    All Paterson Institute for Cancer Research

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