title: Relation of H-2 expression on murine RCT(+) sarcoma cells to lung colonization and sensitivity to NK cells.
abstract: Murine RCT(+) sarcoma cells were sorted using a fluorescence-activated cell sorter with regard to the expression of H-2 antigens and then an increased H-2-expressing subclone was established, and named RCT(+)H-2+. The experimental metastasis of RCT(+) cells was compared with that of RCT(+)H-2+ cells by counting pulmonary colonies on the 21st day after i.v. inoculation of tumor cells (5-10 x 10(4)/mouse). When mice were inoculated with RCT(+) cells, mean numbers of pulmonary colonies were 2.1(range 0-6), 2.8(range 0-7) using 5 x 10(4) and 1 x 10(5) cells, respectively. On the other hand, in the mice inoculated with RCT(+)H-2+ cells, figures obtained were 7.0(range 4-16), 31.9(range 13-79), using 5 x 10(4) and 1 x 10(5) cells, respectively. The survival rate of RCT(+)H-2+ cells was higher than that of RCT(+) cells, when this was assayed in the early stage after i.v. injection of 51Cr-labeled cells (1 x 10(5) cells/mouse). In addition, RCT(+)H-2+ cells were more resistant than RCT(+) cells to lysis mediated by natural killer cells. These data suggest that an increase in metastatic ability was paralleled by an increase in the H-2 antigen expression and a decrease in sensitivity to the natural killer cells.
authors.affiliation: Second Department of Surgery, Toyama Medical and Pharmaceutical University, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Masuyama
authors.forename: H
authors.initials: H
authors.lastname: Ochiai
authors.forename: S
authors.initials: S
authors.lastname: Ishizawa
authors.forename: K
authors.initials: K
authors.lastname: Tazawa
authors.forename: S
authors.initials: S
authors.lastname: Niwayama
authors.forename: M
authors.initials: M
authors.lastname: Fujimaki
mesh_terms: D000818:Animals; D000951:Antigens, Neoplasm / Q000032:analysis; D003602:Cytotoxicity, Immunologic; D006183:H-2 Antigens / Q000032:analysis*; D006649:Histocompatibility Antigens / Q000032:analysis; D007694:Killer Cells, Natural / Q000276:immunology*; D008175:Lung Neoplasms / Q000556:secondary*; D008297:Male; D051379:Mice; D008809:Mice, Inbred C3H; D010844:Picibanil / Q000494:pharmacology; D012513:Sarcoma, Experimental / Q000276:immunology*; D013154:Spleen / Q000276:immunology
chemical_list: D000951:Antigens, Neoplasm; D006183:H-2 Antigens; D006649:Histocompatibility Antigens; C029237:tumor-associated transplantation antigen; D010844:Picibanil