Definition of human cytomegalovirus-specific target antigens recognized by cytotoxic T cells generated in vitro by using an autologous lymphocyte system.
We developed an in vitro system for the generation of human cytomegalovirus (CMV)-specific cytotoxic T cells (CTL) that avoids the necessity of constituting a panel of HLA-typed fibroblasts. Autologous donor leucocytes were coated with CMV antigens and were used as both stimulator and target cells. With the use of this system, CMV-specific effector cells were efficiently generated from seropositive but not seronegative donors. These CMV-specific effectors were HLA-restricted and had characteristics of T cells. Maximum lymphoproliferation preceded the appearance of maximum CTL activity by 3 to 4 days, and a close correlation was seen between both activities. Mouse anti-CMV monoclonal antibodies were used in blocking experiments in an attempt to define target antigens recognized by CMV-specific cytotoxic lymphocytes. Monoclonal antibodies directed against an early CMV membrane antigen, against neutralization epitopes, or against nuclear inclusion body protein all specifically inhibited CMV-sensitized effector cell activity but did not affect influenza virus-specific lysis. Monoclonal antibodies directed against a normal cell determinant or against poliovirus did not affect CMV-specific CTL activity. CMV-immune cytotoxic T cells could be consistently and specifically inhibited in their lytic activity by pretreating antigen-coated target cells with monoclonal antibodies directed against CMV-related proteins.
B
B
Charpentier
S
S
Michelson
B
B
Martin
D000293:Adolescent; D000328:Adult; D000911:Antibodies, Monoclonal / Q000502:physiology; D000956:Antigens, Viral / Q000276:immunology*; D001667:Binding, Competitive; D003587:Cytomegalovirus / Q000276:immunology*; D003601:Cytotoxicity Tests, Immunologic; D003602:Cytotoxicity, Immunologic; D000939:Epitopes; D005260:Female; D006680:HLA Antigens / Q000276:immunology; D006801:Humans; D008213:Lymphocyte Activation; D008297:Male; D008875:Middle Aged; D010641:Phenotype; D013602:T-Lymphocytes, Cytotoxic / Q000145:classification / Q000276:immunology*
D000911:Antibodies, Monoclonal; D000956:Antigens, Viral; D000939:Epitopes; D006680:HLA Antigens