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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

gamma-Interferon induced by S. aureus protein A augments natural killing and ADCC.

Staphylococcus aureus produces a protein identified as protein A (SpA) with a molecular weight of 41,000 (ref. 1) which binds to the Fc region of many types of mammalian IgG2, activates complement, blocks opsonins and is both chemotactic and mitogenic. SpA has been used for various immunological purposes including removal of immune complexes, arming effector cells with antibody, distinguishing between antibody-dependent cell-mediated cytotoxicity (ADCC) and natural killing (NK), and exerting anti-tumor activity. We have now demonstrated that SpA induces the production of gamma interferon (IFN-gamma) in nonadherent, T lymphocyte-depleted (E-), Fc receptor-bearing (FcR+) human peripheral blood lymphocytes. Our data also suggest that IFN-gamma is a potent stimulator of both NK and ADCC activity.[1]


  1. gamma-Interferon induced by S. aureus protein A augments natural killing and ADCC. Catalona, W.J., Ratliff, T.L., McCool, R.E. Nature (1981) [Pubmed]
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