title: Specific cell-mediated cytotoxicity against a virus-infected syngeneic cell line in isogeneic ginbuna crucian carp.
abstract: In the present study, we attempted to determine whether virus-specific cell-mediated cytotoxicity occurs in fish. Experiments were conducted with clonal ginbuna crucian carp (Carassius auratus langsdorfii) (S3n strain), and the syngeneic cell line (CFS). Two infectious viruses were used: infectious pancreatic necrosis virus (IPNV) and eel virus from America (EVA). Peripheral blood leukocytes, which consisted almost entirely (95%) of lymphocytes and thrombocytes, from S3n ginbuna immunized with virus-infected CFS cells lysed the virus-infected CFS cells (immunogen) more completely than CFS cells infected with a different virus (non-immunogen). This specific cell-mediated cytotoxicity of ginbuna against virus-infected CFS cells was efficiently induced as a result of in vivo secondary immunization. A significant specific cytotoxic activity peaked during 7-10 days after the secondary immunization. In addition, effector cells immunized with IPNV-infected syngeneic cells did not lyse IPNV-infected xenogeneic cells. These results support the hypothesis that fish exhibit specific cytotoxicity against virus-infected cells, resembling the specific cytotoxicites of higher vertebrates.
authors.affiliation: Department of Aquatic Biosciences, Tokyo University of Fisheries, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Somamoto
authors.forename: T
authors.initials: T
authors.lastname: Nakanishi
authors.forename: N
authors.initials: N
authors.lastname: Okamoto
mesh_terms: D000818:Animals; D002347:Carps; D002460:Cell Line; D003601:Cytotoxicity Tests, Immunologic; D003602:Cytotoxicity, Immunologic / Q000276:immunology*; D018984:Epitopes, T-Lymphocyte / Q000276:immunology; D006054:Goldfish / Q000276:immunology*; D007111:Immunity, Cellular; D007115:Immunization Schedule; D007117:Immunization, Secondary; D007519:Isoantigens / Q000276:immunology*; D017686:Oncorhynchus mykiss; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology / Q000821:virology
chemical_list: D018984:Epitopes, T-Lymphocyte; D007519:Isoantigens