title: V delta 2+ gamma delta T lymphocytes are cytotoxic to the MCF 7 breast carcinoma cell line and can be detected among the T cells that infiltrate breast tumors.
abstract: In order to study the potential role of gamma delta T lymphocytes in cytotoxicity against breast carcinoma cells, normal peripheral blood gamma delta cells were isolated and triggered with an alloantigenic lymphoblastoid B cell line and recombinant interleukin-2 and cloned. The clones expressed a CD3+V gamma 9+V delta 2+CD4-CD8- (or CD8+) phenotype. Five clones were cytotoxic to the Molt 4 T cell leukemia, but not to the alloantigen, whereas one clone lysed the alloantigen, but not the Molt 4 line. Clones that were cytotoxic to Molt 4 were either spontaneously cytotoxic against MCF 7 breast carcinoma cells or could be induced to kill MCF 7 cells by monoclonal antibodies specific for the gamma delta T cell receptor. In situ staining demonstrated that V delta 2+ as well as other subsets of gamma delta T cells can be detected in the lymphocytic infiltrate within breast carcinomas. These data showing that V delta 2+ T cells can recognize and kill cells of breast carcinoma lineage in vitro, and that cells expressing V delta 2 genes in their T cell receptor structure can be detected in the tumor, suggest that further studies of the nature of the interactions between V delta 2 T cells and breast carcinoma cells are warranted.
authors.affiliation: Department of Medicine F, Chaim Sheba Medical Center, Tel Aviv, Israel.
authors.forename: I
authors.initials: I
authors.lastname: Bank
authors.forename: M
authors.initials: M
authors.lastname: Book
authors.forename: M
authors.initials: M
authors.lastname: Huszar
authors.forename: Y
authors.initials: Y
authors.lastname: Baram
authors.forename: I
authors.initials: I
authors.lastname: Schnirer
authors.forename: H
authors.initials: H
authors.lastname: Brenner
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology; D001943:Breast Neoplasms / Q000276:immunology*; D002999:Clone Cells / Q000276:immunology; D003602:Cytotoxicity, Immunologic; D005260:Female; D006801:Humans; D016246:Lymphocytes, Tumor-Infiltrating / Q000276:immunology*; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000032:analysis* / Q000276:immunology; D016176:T-Lymphocyte Subsets / Q000276:immunology; D013601:T-Lymphocytes / Q000166:cytology / Q000276:immunology* / Q000648:ultrastructure; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*; D014407:Tumor Cells, Cultured / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal; D016692:Receptors, Antigen, T-Cell, gamma-delta