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Tissue Antigens. 2000 Sep;56(3):240-7.

Homogenous expression of killer cell immunoglobulin-like receptors (KIR) on polyclonal natural killer cells detected by a monoclonal antibody to KIR2D.

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  • 1Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland 20852, USA.


The activity of human natural killer (NK) cells is in part regulated by the expression of killer cell immunoglobulin (Ig)-like receptors (KIR) that recognize major histocompatibility complex (MHC) class I and can inhibit NK cell cytotoxicity. A monoclonal anti-KIR antibody was established and designated Lig1. Lig1 was shown to be specific for KIR in cell-surface staining and to react with all KIR2D, except KIR2DL4 which lacks a D1 domain, but not with KIR3D molecules in an enzyme-linked immunoadsorbent assay (ELISA) and Western blotting. Unlike other anti-KIR antibodies, Lig1 did not inhibit binding of KIR-Ig-fusion proteins to MHC-class I expressing cells nor did it interfere with KIR-mediated inhibition of NK cell cytotoxicity in a functional assay. Lig1 reacted with all NK cells in polyclonal NK populations from different donors, demonstrating that all NK cells express at least one KIR2D receptor.

[PubMed - indexed for MEDLINE]
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