title: Induction of antitumor immunity with Fas/APO-1 ligand (CD95L)-transfected neuroblastoma neuro-2a cells.
abstract: Fas/Apo-1 (CD95)-Fas ligand (FasL) system has been implicated in the suppression and stimulation of immune responses. We examined the induction of antitumor immunity with neuroblastoma Neuro-2a cells transfected with FasL cDNA (Neuro-2a+FasL). Neuro-2a+FasL cells expressed FasL on the cell surface and secreted soluble FasL. Histologic and flow cytometric analyses revealed that Neuro-2a+FasL cells caused neutrophils to infiltrate into the injected site, resulting in strong inflammation. Neutrophil infiltration was inhibited by treatment with anti-FasL mAb and did not occur in Fas-deficient lpr mice. Normal syngeneic mice rejected Neuro-2a+FasL cells after the inflammation and acquired tumor-specific protective immunity. CD8+ T cells were responsible for the antitumor immunity. Neuro-2a+FasL cells formed tumors after far longer latency compared with mock-transfected Neuro-2a+Neo cells in nude mice, and immune competent mice rejected Neuro-2a cells but not sarcoma S713a cells when they were injected with Neuro-2a+FasL cells in a mixture. These results suggest that neutrophils attracted through the Fas-FasL system may impair tumor cells by inflammation at the initial step, followed by development of CD8+ T cell-dependent tumor-specific antitumor immunity, leading to complete eradication of tumor cells. Importantly, the treatment with Neuro-2a+FasL cells exhibited therapeutic efficacy against growing tumors.
authors.affiliation: Department of Cancer Therapeutics, Tokyo Metropolitan Institute of Medical Science, Japan. shimizu@rinshoken.or.jp
authors.forename: M
authors.initials: M
authors.lastname: Shimizu
authors.forename: A
authors.initials: A
authors.lastname: Fontana
authors.forename: Y
authors.initials: Y
authors.lastname: Takeda
authors.forename: H
authors.initials: H
authors.lastname: Yagita
authors.forename: T
authors.initials: T
authors.lastname: Yoshimoto
authors.forename: A
authors.initials: A
authors.lastname: Matsuzawa
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000276:immunology; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology; D002465:Cell Movement / Q000276:immunology; D002471:Cell Transformation, Neoplastic / Q000235:genetics / Q000276:immunology; D053222:Fas Ligand Protein; D005434:Flow Cytometry; D015972:Gene Expression Regulation, Neoplastic / Q000276:immunology; D006084:Graft Rejection / Q000276:immunology; D006098:Granulocytes / Q000276:immunology / Q000473:pathology; D016219:Immunotherapy, Adoptive / Q000379:methods*; D007249:Inflammation / Q000276:immunology / Q000473:pathology; D008024:Ligands; D008562:Membrane Glycoproteins / Q000096:biosynthesis / Q000235:genetics* / Q000276:immunology; D051379:Mice; D008805:Mice, Inbred A; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D019463:Mice, Inbred MRL lpr; D008817:Mice, Mutant Strains; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D009447:Neuroblastoma / Q000276:immunology* / Q000473:pathology / Q000628:therapy*; D014162:Transfection / Q000276:immunology*; D014407:Tumor Cells, Cultured; D019014:fas Receptor / Q000235:genetics* / Q000276:immunology
chemical_list: D053222:Fas Ligand Protein; C505658:Fasl protein, mouse; D008024:Ligands; D008562:Membrane Glycoproteins; D019014:fas Receptor