title: Interleukin-2-activated murine cell lines with macrophage- and B-lymphoblast-lytic activity.
abstract: Interleukin-2 (IL-2)-activated murine killer cell lines with macrophage- and B-lymphoblastic-lytic activity were established, and their target specificity, surface markers, recognition-related structures, and requirements for optimal cell growth were characterized. Sustained growth of IL-2-activated lymphocytes was supported by the combination of IL-2 and IL-4-enriched T cell conditioned medium (CM), but was not supported by IL-2 alone or the combination of IL-2 and IL-3-containing CM in the presence of macrophages (M phi). The established line required continuous contact with M phi to maintain anti-M phi cytolytic activity. Flow cytometric analysis showed that the original line isolated by the first cloning was Thyl+, CD4-, and weakly CD8+, FcR+. The majority of these cells were CD3+ and TCR-V beta 8+. From this line, the CD3+, TCR-V beta 8+ and CD3-, TCR-V beta 8- clones were isolated by subcloning. The former clone showed Thyl+, CD3+, CD4-, CD8-, TCR-V beta 8+, FcR(+)-phenotype, and the latter clone showed Thyl+, CD3-, CD4-, CD8-, TCR-V beta 8-, FcR- phenotype. The original line and subclones showed a similar target specificity and killed resident or thioglycollate (TG)-induced peritoneal M phi and B-lymphoblasts, but did not kill T-lymphoblasts. Allogeneic M phi, M phi-like cell line P388D1, and B cell hybridoma were sensitive, whereas fresh lymphocytes, T cell lymphoma BW5147, natural killer (NK)-sensitive YAC-1, and NK-resistant P815 tumor cells were resistant to lysis by these cytotoxic lines. The addition of anti-H-2 heteroserum, anti-MHC class 1, anti-MHC class II, anti-CD3, or anti-TCR-V beta 8 monoclonal antibody (mAb) to assay cultures did not inhibit the anti-M phi cytolysis by these killer cells. In addition, the CD3- TCR-V beta 8- clone killed M phi and B lymphoblasts better than the CD3+, TCR-V beta 8+ clone. These results suggest that cytotoxic lines established in this study do not use the T cell receptor (TCR) molecules to recognize target cells and the MHC molecules are not involved in recognition. Anti-LFA-1 mAb partially inhibited anti-M phi-lysis, suggesting that the cell contact between targets and effectors is important in cytolysis. Our present data suggest that the culture condition containing IL-2, IL-4, and M phi may support the continuous growth of non-MHC-restricted killer cells with relative target specificity against M phi and B-lymphoblasts.
authors.affiliation: First Department of Internal Medicine, Toyama Medical and Pharmaceutical University, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Suzuki
authors.forename: M
authors.initials: M
authors.lastname: Ikemoto
authors.forename: A
authors.initials: A
authors.lastname: Yokoyama
authors.forename: T
authors.initials: T
authors.lastname: Kamitani
authors.forename: N
authors.initials: N
authors.lastname: Yamashita
authors.forename: M
authors.initials: M
authors.lastname: Maruyama
authors.forename: S
authors.initials: S
authors.lastname: Yano
mesh_terms: D000818:Animals; D000943:Antigens, Differentiation / Q000276:immunology; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology*; D017252:CD3 Complex; D002460:Cell Line; D003602:Cytotoxicity, Immunologic; D007111:Immunity, Cellular; D007376:Interleukin-2 / Q000494:pharmacology*; D015979:Killer Cells, Lymphokine-Activated / Q000276:immunology*; D016169:Lymphocyte Function-Associated Antigen-1 / Q000276:immunology; D008264:Macrophages / Q000276:immunology*; D008285:Major Histocompatibility Complex; D051379:Mice; D008815:Mice, Inbred Strains; D011948:Receptors, Antigen, T-Cell / Q000276:immunology; D011961:Receptors, Fc / Q000276:immunology; D017452:Receptors, IgG
chemical_list: D000943:Antigens, Differentiation; D000945:Antigens, Differentiation, T-Lymphocyte; D017252:CD3 Complex; D007376:Interleukin-2; D016169:Lymphocyte Function-Associated Antigen-1; D011948:Receptors, Antigen, T-Cell; D011961:Receptors, Fc; D017452:Receptors, IgG