TY - JOUR
T1 - Tyrosine phosphorylation of the FcγRIII(CD16)
T2 - ζ complex in human natural killer cells: Induction by antibody-dependent cytotoxicity but not by natural killing
AU - Vivier, Eric
AU - Morin, Paul
AU - O'Brien, Carmeline
AU - Druker, Brian
AU - Schlossman, Stuart F.
AU - Anderson, Paul
PY - 1991/1/1
Y1 - 1991/1/1
N2 - NK cells are large granular lymphocytes capable of killing certain tumor cells and virally infected cells in a non-MHC-restricted manner. NK cells can also effect an antibody dependent cytotoxicity that is triggered by CD16, an FcR for IgG. In NK cells, CD16 is expressed in association with ζ, a signal transducing subunit of the TCR complex. Here we show that, just as T cell activation via the TCR complex results in tyrosine phosphorylation of ζ TCR, NK cell activation via CD16 results in tyrosine phosphorylation of ζ NK. Whereas antibody-dependent cytotoxicity also results in tyrosine phosphorylation of ζ, natural cytotoxicity does not. Our results indicate that f functions as a transducing element for antibody dependent, but not antibody independent killing by NK cells. Consequently, NK cells are likely to express at least two distinct receptor complexes capable of triggering cytolytic effector function.
AB - NK cells are large granular lymphocytes capable of killing certain tumor cells and virally infected cells in a non-MHC-restricted manner. NK cells can also effect an antibody dependent cytotoxicity that is triggered by CD16, an FcR for IgG. In NK cells, CD16 is expressed in association with ζ, a signal transducing subunit of the TCR complex. Here we show that, just as T cell activation via the TCR complex results in tyrosine phosphorylation of ζ TCR, NK cell activation via CD16 results in tyrosine phosphorylation of ζ NK. Whereas antibody-dependent cytotoxicity also results in tyrosine phosphorylation of ζ, natural cytotoxicity does not. Our results indicate that f functions as a transducing element for antibody dependent, but not antibody independent killing by NK cells. Consequently, NK cells are likely to express at least two distinct receptor complexes capable of triggering cytolytic effector function.
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M3 - Article
C2 - 1701792
AN - SCOPUS:0026021836
SN - 0022-1767
VL - 146
SP - 206
EP - 210
JO - Journal of Immunology
JF - Journal of Immunology
IS - 1
ER -