title: Functional analysis of TCR gamma delta+ T cells in tumour-infiltrating lymphocytes (TIL) of human pancreatic cancer.
abstract: In six patients with advanced pancreatic carcinoma, TIL and tumour-draining lymphocytes (TDL) were isolated from primary pancreatic tumour and regional lymph nodes. In comparison with TDL and peripheral blood lymphocytes (PBL), TIL contained a comparatively higher percentage of TCR gamma delta+ cells, although they were still a small fraction. By 2 weeks culture with rIL-2 and immobilized OKT-3 antibody, the TCR gamma delta+ cells in TIL were preferentially expanded at the early culture periods, although it was temporary. In four cases, the TCR gamma delta+ and CD8+ TCR alpha beta+ TIL were separated by negative sorting using flowcytometry. All the TCR gamma delta+ TIL were CD4-, CD8- (double negative), and one of the TIL lines was mostly composed of delta TCS1+ cells, while the others were delta TCS1-. In comparison with CD8+ TCR alpha beta+ TIL, all the TCR gamma delta+ TIL exhibited much stronger lytic activity against freshly isolated autologous pancreatic cancer cells. However, all the gamma delta+ TIL also exhibited a strong non-MHC-restricted cytotoxicity, and there was no correlation between the lytic pattern and the percentage of delta TCS1+ cells. These data suggest that the TCR gamma delta+ T cells can proliferate vigorously in a certain condition, and if successfully expanded in vitro they might be helpful material for effective adoptive immunotherapy.
authors.affiliation: First Department of Surgery, Tokyo University, Japan.
authors.forename: J
authors.initials: J
authors.lastname: Kitayama
authors.forename: Y
authors.initials: Y
authors.lastname: Atomi
authors.forename: H
authors.initials: H
authors.lastname: Nagawa
authors.forename: A
authors.initials: A
authors.lastname: Kuroda
authors.forename: T
authors.initials: T
authors.lastname: Mutoh
authors.forename: M
authors.initials: M
authors.lastname: Minami
authors.forename: T
authors.initials: T
authors.lastname: Juji
mesh_terms: D000368:Aged; D003602:Cytotoxicity, Immunologic; D005260:Female; D006801:Humans; D008213:Lymphocyte Activation; D016246:Lymphocytes, Tumor-Infiltrating / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000276:immunology*; D010641:Phenotype; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000032:analysis*
chemical_list: D016692:Receptors, Antigen, T-Cell, gamma-delta