title: Antitumor vaccine effect of irradiated murine neuroblastoma cells producing interleukin-2 or granulocyte macrophage-colony stimulating factor.
abstract: We have examined vaccination effects of cytokine-producing murine neuroblastoma cells (C1300). C1300 cells retrovirally transduced with interleukin-2 (IL-2) or granulocyte macrophage-colony stimulation factor (GM-CSF) gene were established. Their in vitro proliferation rates and the class I expression of major histocompatibility complex were not different from those of wild-type cells. Five-Gy irradiation of the respective cytokine producers slightly reduced the in vitro cell growth but treatment with 15 Gy significantly impaired the proliferation. In contrast, the secretion of both cytokines from the respective transduced cells was retained compared with the cell growth. We immunized syngeneic mice with irradiated wild-type cells as a control or cytokine-producing cells and challenged the mice with unirradiated wild-type cells. The control mice developed tumors of the challenged wild-type cells, on the contrary, the mice which had received irradiated IL-2 or GM-CSF producers did not. Thus, IL-2- or GM-CSF-expressing syngeneic tumor cells can be potentially used as a tumor vaccine by inducing protective immunity against low immunogenic neuroblastomas in the inoculated hosts.
authors.affiliation: Department of Pediatric Surgery, School of Medicine, Chiba University, Chuo-ku, Chiba 260-8670, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Yoshida
authors.forename: H
authors.initials: H
authors.lastname: Enomoto
authors.forename: K
authors.initials: K
authors.lastname: Kawamura
authors.forename: K
authors.initials: K
authors.lastname: Takenaga
authors.forename: M
authors.initials: M
authors.lastname: Tanabe
authors.forename: N
authors.initials: N
authors.lastname: Ohnuma
authors.forename: S
authors.initials: S
authors.lastname: Sakiyama
authors.forename: M
authors.initials: M
authors.lastname: Tagawa
mesh_terms: D000818:Animals; D019496:Cancer Vaccines; D002455:Cell Division / Q000528:radiation effects; D002999:Clone Cells; D005260:Female; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000096:biosynthesis*; D007376:Interleukin-2 / Q000096:biosynthesis*; D051379:Mice; D009368:Neoplasm Transplantation; D009447:Neuroblastoma / Q000378:metabolism* / Q000473:pathology / Q000532:radiotherapy*; D014407:Tumor Cells, Cultured
chemical_list: D019496:Cancer Vaccines; D007376:Interleukin-2; D016178:Granulocyte-Macrophage Colony-Stimulating Factor