Human macrophages armed with murine immunoglobulin G2a antibodies to tumors destroy human cancer cells

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Science  26 Aug 1983:
Vol. 221, Issue 4613, pp. 865-867
DOI: 10.1126/science.6879183


Macrophages isolated from tumor-bearing patients as well as cultured human monocytes express Fc receptors that cross-react strongly with murine immunoglobulins of the G2a but only slightly or not at all with the G1, G2b, or G3 subclasses. Such macrophages in the presence of murine immunoglobulin G2a monoclonal antibodies to tumors mediated the killing of tumor cells in vitro. These data suggest that monoclonal antibodies of the G2a subclass may be useful in the immunotherapy of human cancer.