title: Isolation and functional characteristics of FcR+ and FcR- human monocyte subsets.
abstract: Human peripheral blood monocytes (M phi) were separated into Fc receptor positive (FcR+) and FcR- subsets by rosetting with O,Rh+ human erythrocytes coated with IgG anti-D antibody, followed by density gradient centrifugation and adherence. The FcR+M phi suppressed PHA- and PPD-induced lympho-proliferation and also exhibited a strong cytostatic effect against tumor cell lines in vitro, but were a poor source of antigen-presenting cells. In contrast, the FcR- subset did not cause suppression but was highly active in the presentation of PPD to T cells and in stimulation of both allogeneic mixed lymphocyte reaction (allo-MLR) and autologous (auto-MLR). PWM-induced immunoglobulin secretion in vitro was greatly enhanced by the FcR- but not the FcR+ subset. Nevertheless, both FcR+ and FcR- subsets showed comparable HLA-DR antigen expression. These results indicate that human M phi, like lymphocytes, may consist of several subsets that differ significantly in their immunologic functions.
mesh_terms: D000911:Antibodies, Monoclonal / Q000502:physiology; D000921:Antibody-Producing Cells / Q000378:metabolism; D002460:Cell Line; D002469:Cell Separation / Q000379:methods*; D003602:Cytotoxicity, Immunologic; D006801:Humans; D008213:Lymphocyte Activation; D007959:Lymphocyte Culture Test, Mixed; D008262:Macrophage Activation; D009000:Monocytes / Q000145:classification / Q000276:immunology / Q000378:metabolism*; D010835:Phytohemagglutinins / Q000494:pharmacology; D011043:Pokeweed Mitogens / Q000494:pharmacology; D011961:Receptors, Fc / Q000502:physiology*; D014373:Tuberculin / Q000494:pharmacology
chemical_list: D000911:Antibodies, Monoclonal; D010835:Phytohemagglutinins; D011043:Pokeweed Mitogens; D011961:Receptors, Fc; D014373:Tuberculin