title: Regulatory role of peritoneal NK1.1+ alpha beta T cells in IL-12 production during Salmonella infection.
abstract: NK1.1+ alpha beta T cells emerge in the peritoneal cavity after an i.p. infection with Salmonella choleraesuis in mice. To elucidate the role of the NK1.1+ alpha beta T cells during murine salmonellosis, mice lacking NK1.1+ alpha beta T cells by disruption of TCR beta (TCR beta-/-), beta 2m (beta 2m-/-), or J alpha 281 (J alpha 281-/-) gene were i.p. inoculated with S. choleraesuis. The peritoneal exudate T cells in wild type (wt) mice on day 3 after infection produced IL-4 upon TCR alpha beta stimulation, whereas those in TCR beta-/-, beta 2m-/-, or J alpha 281-/- mice showed no IL-4 production upon the stimulation, indicating that NK1.1+ alpha beta T cells are the main source of IL-4 production at the early phase of Salmonella infection. Neutralization of endogenous IL-4 by administration of anti-IL-4 mAb to wt mice reduced the number of Salmonella accompanied by increased IL-12 production by macrophages after Salmonella infection. The IL-12 production by the peritoneal macrophages was significantly augmented in mice lacking NK1.1+ alpha beta T cells after Salmonella infection accompanied by increased serum IFN-gamma level. The aberrantly increased IL-12 production in infected TCR beta-/- or J alpha 281-/- mice was suppressed by adoptive transfer of T cells containing NK1.1+ alpha beta T cells but not by the transfer of T cells depleted of NK1.1+ alpha beta T cells or T cells from J alpha 281-/- mice. Taken together, it is suggested that NK1. 1+ alpha beta T cells eliciting IL-4 have a regulatory function in the IL-12 production by macrophages at the early phase of Salmonella infection.
authors.affiliation: Laboratory of Host Defense and Germfree Life, Research Institute for Disease Mechanism and Control, Nagoya University School of Medicine, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Naiki
authors.forename: H
authors.initials: H
authors.lastname: Nishimura
authors.forename: T
authors.initials: T
authors.lastname: Kawano
authors.forename: Y
authors.initials: Y
authors.lastname: Tanaka
authors.forename: S
authors.initials: S
authors.lastname: Itohara
authors.forename: M
authors.initials: M
authors.lastname: Taniguchi
authors.forename: Y
authors.initials: Y
authors.lastname: Yoshikai
mesh_terms: D019264:Adoptive Transfer; D000818:Animals; D000911:Antibodies, Monoclonal / Q000008:administration & dosage; D000941:Antigens / Q000096:biosynthesis; D000950:Antigens, Ly; D000954:Antigens, Surface; D001202:Ascitic Fluid / Q000276:immunology* / Q000382:microbiology; D016207:Cytokines / Q000096:biosynthesis; D015536:Down-Regulation / Q000276:immunology; D005122:Exudates and Transudates / Q000276:immunology / Q000382:microbiology; D007274:Injections, Intraperitoneal; D018664:Interleukin-12 / Q000096:biosynthesis*; D015847:Interleukin-4 / Q000037:antagonists & inhibitors / Q000096:biosynthesis / Q000276:immunology; D037181:Lectins, C-Type; D017710:Lymphocyte Transfusion; D008231:Lymphopenia / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D055651:NK Cell Lectin-Like Receptor Subfamily B; D014176:Protein Biosynthesis; D011506:Proteins; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000235:genetics / Q000276:immunology*; D012481:Salmonella Infections, Animal / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D016176:T-Lymphocyte Subsets / Q000276:immunology* / Q000378:metabolism / Q000637:transplantation
chemical_list: D000911:Antibodies, Monoclonal; D000941:Antigens; D000950:Antigens, Ly; D000954:Antigens, Surface; D016207:Cytokines; C527211:Klrb1c protein, mouse; D037181:Lectins, C-Type; D055651:NK Cell Lectin-Like Receptor Subfamily B; D011506:Proteins; D016693:Receptors, Antigen, T-Cell, alpha-beta; D018664:Interleukin-12; D015847:Interleukin-4