title: Enhancement of B cell responses by the interaction of CD2 with LFA-3.
abstract: Potential effect of the interaction of CD2 with its ligand LFA-3 on B cell responses in vitro was studied to evaluate the action of CD2-LFA-3 in immune responses. It was found that: 1) addition of autologous erythrocytes to unfractional mononuclear cells resulted in enhancement of PWM-induced lymphocyte proliferation, and had no significant influence on non-mitogen stimulation; 2) autologous erythrocytes potentiated the synthesis of immunoglobulins; and 3) costimulating effects of autologous RBC can be depressed by preincubation of PBMNC with anti-CD2 monoclonal antibody (WuTll). The results suggest that preincubation of mononuclear cells with anti-CD2 McAb has a down-regulating effects on B cell responses and the interaction of CD2 with its ligand LFA-3 expressed by RBC is closely related to immune responses.
mesh_terms: D000328:Adult; D000911:Antibodies, Monoclonal; D015703:Antigens, CD / Q000276:immunology*; D000945:Antigens, Differentiation, T-Lymphocyte / Q000276:immunology*; D001402:B-Lymphocytes / Q000166:cytology / Q000276:immunology*; D018801:CD2 Antigens; D018968:CD58 Antigens; D002455:Cell Division; D015536:Down-Regulation / Q000276:immunology; D004912:Erythrocytes / Q000276:immunology*; D006801:Humans; D007136:Immunoglobulins / Q000096:biosynthesis; D008562:Membrane Glycoproteins / Q000276:immunology*; D011971:Receptors, Immunologic / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D000945:Antigens, Differentiation, T-Lymphocyte; D018801:CD2 Antigens; D018968:CD58 Antigens; D007136:Immunoglobulins; D008562:Membrane Glycoproteins; D011971:Receptors, Immunologic