title: CD2 and other surface molecules in the regulation of non-MHC-restricted cytolytic function.
abstract: The effect of anti-CD2 and Fc receptor binding molecules on the cytolytic function of a highly enriched population of CD3- large granular lymphocytes (LGL) was studied. These cells could mediate natural killer (NK) activity, antibody-dependent cellular cytotoxicity (ADCC) and lectin-dependent cellular cytotoxicity (LDCC). Both ADCC and LDCC were enhanced by anti-CD2. The enhanced LDCC could also be observed with IL-2-activated LGL. However, NK cell activity was usually slightly diminished or unaffected by anti-CD2 binding. Immune complex and aggregated human IgG had no effect on ADCC but an anti-CD16 showed a dose-dependent inhibition of ADCC, reversible by anti-HLA-ABC and anti-CD2. Cross-linking of LGL surface-bound anti-CD2 caused an almost complete inhibition of LDCC and ADCC but had much less effect on NK activity. These experiments show that ADCC and LDCC mediated by CD3- LGL can be influenced by perturbing the CD2 molecule. NK activity was, however, affected differently, suggesting some basic differences in the pathway of ADCC and NK function.
authors.affiliation: Emory University School of Medicine, Department of Pathology and Laboratory Medicine, Atlanta, Georgia 30322.
authors.forename: W C
authors.initials: WC
authors.lastname: Chan
authors.forename: G
authors.initials: G
authors.lastname: Ye
authors.forename: S
authors.initials: S
authors.lastname: Link
authors.forename: A C
authors.initials: AC
authors.lastname: Mawle
authors.forename: J K
authors.initials: JK
authors.lastname: Nicholson
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology; D000920:Antibody-Dependent Cell Cytotoxicity; D000945:Antigens, Differentiation, T-Lymphocyte / Q000276:immunology*; D000954:Antigens, Surface / Q000276:immunology*; D018801:CD2 Antigens; D003602:Cytotoxicity, Immunologic; D006801:Humans; D007074:Immunoglobulin G / Q000276:immunology; D007694:Killer Cells, Natural / Q000276:immunology; D008214:Lymphocytes / Q000276:immunology*; D008562:Membrane Glycoproteins / Q000276:immunology; D011961:Receptors, Fc / Q000276:immunology*; D011971:Receptors, Immunologic / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface; D018801:CD2 Antigens; D007074:Immunoglobulin G; D008562:Membrane Glycoproteins; D011961:Receptors, Fc; D011971:Receptors, Immunologic