A bispecific antibody detects cytotoxic T lymphocytes of unknown antigen specificity in patients with granular lymphocyte-proliferative disorders.
A simple and sensitive method for the detection of cytotoxic T lymphocytes (CTL) of unknown antigen specificity was investigated. Using anti-CD3 Fab' x anti-CD10 Fab' bispecific antibody or intact anti-CD3 monoclonal antibody, we induced cytotoxicity for CD10+, Fc gamma receptor-positive Daudi target cells in peripheral blood mononuclear cells (PBMC) obtained from patients with granular lymphocyte-proliferative disorders (GLPD). The results indicated that the bispecific antibody was much more efficient than the intact anti-CD3 monoclonal antibody in inducing cytotoxicity. Since CD3+CD4-CD8+ granular lymphocytes in patients with GLPD are considered to be in vivo-primed CTL of unknown antigen specificity, this bispecific antibody method may be useful for detecting in vivo-primed CTL within PBMC. By using this bispecific antibody, it will be possible to detect circulating in vivo-primed CTL in other clinical conditions.
Kaneko
T
T
Department of Medicine, Tokyo Women's Medical College.
Oshimi
K
K
Seto
T
T
Okumura
K
K
Mizoguchi
H
H
D000906:Antibodies / Q000276:immunology; D000918:Antibody Specificity / Q000276:immunology; D015703:Antigens, CD / Q000276:immunology; D000943:Antigens, Differentiation / Q000276:immunology; D000945:Antigens, Differentiation, T-Lymphocyte / Q000276:immunology; D000951:Antigens, Neoplasm / Q000276:immunology; D000954:Antigens, Surface / Q000032:analysis; D017252:CD3 Complex; D003602:Cytotoxicity, Immunologic / Q000276:immunology*; D000939:Epitopes / Q000276:immunology; D006801:Humans; D008232:Lymphoproliferative Disorders / Q000276:immunology*; D015260:Neprilysin; D011948:Receptors, Antigen, T-Cell / Q000276:immunology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*
D000906:Antibodies; D015703:Antigens, CD; D000943:Antigens, Differentiation; D000945:Antigens, Differentiation, T-Lymphocyte; D000951:Antigens, Neoplasm; D000954:Antigens, Surface; D017252:CD3 Complex; D000939:Epitopes; D011948:Receptors, Antigen, T-Cell; D015260:Neprilysin