title: The comparison of cell-mediated immunity induced by immunization with porin, viable cells and killed cells of Salmonella typhimurium.
abstract: A marked level of cell-mediated immunity (CMI) to Salmonella typhimurium-infection in mice, as determined by acquired resistance, delayed-type hypersensitivity, interleukin-2 production and interferon-gamma production, was induced by immunization with porin or viable cells but not with killed cells of S. typhimurium LT2. When the up-regulation of immune system to each immunogen was studied by comparing increases of Ia-bearing macrophages, the immunization with porin or viable cells, but not killed cells, could stimulate the immune system for more than 14 days. Interleukin-1 (IL-1) production of macrophages to each immunogen was also examined; the result showed that immunization with porin or viable cells could induce a notable level of IL-1 production, while killed cells could not. However, when the abilities to induce these immune responses were compared between UV-killed and heat-killed cells, UV-killed cells were superior to heat-killed cells. These results suggested that the ineffectiveness of immunogen that lacked CMI-inducing ability might be ascribed to the denaturation of antigen and the insufficient inductions of Ia-bearing macrophages and IL-1 production.
authors.affiliation: Department of Microbiology, Meiji College of Pharmacy, Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Matsui
authors.forename: T
authors.initials: T
authors.lastname: Arai
mesh_terms: D000818:Animals; D001425:Bacterial Outer Membrane Proteins / Q000276:immunology*; D006968:Hypersensitivity, Delayed / Q000276:immunology; D007111:Immunity, Cellular; D007371:Interferon-gamma / Q000096:biosynthesis; D007376:Interleukin-2 / Q000096:biosynthesis; D008264:Macrophages / Q000276:immunology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D018272:Porins; D012481:Salmonella Infections, Animal / Q000276:immunology* / Q000517:prevention & control; D012486:Salmonella typhimurium / Q000276:immunology*; D014613:Vaccines, Attenuated / Q000276:immunology*; D015164:Vaccines, Inactivated / Q000276:immunology*
chemical_list: D001425:Bacterial Outer Membrane Proteins; D007376:Interleukin-2; D018272:Porins; D014613:Vaccines, Attenuated; D015164:Vaccines, Inactivated; D007371:Interferon-gamma