title: IL-2 and IL-7 differentially induce CD4-CD8- alpha beta TCR+NK1.1+ large granular lymphocytes and IL-4-producing cells from CD4-CD8- alpha beta TCR+NK1.1- cells: implications for the regulation of Th1- and Th2-type responses.
abstract: Effector functions of CD4-CD8- double negative (DN) alpha beta TCR+ cells were examined. Among mouse DN alpha beta TCR+ thymocytes, NK1.1+ cells expressing a canonical V alpha 14/J alpha 281 TCR but not NK1.1- cells produce IL-4 upon TCR cross-linking and IFN-gamma upon cross-linking of NK1.1 as well as TCR. Production of IL-4 but not IFN-gamma from DN alpha beta TCR+NK1.1+ cells was markedly suppressed by IL-2. Whereas V alpha 14/J alpha 281 TCR+ cells express NK1.1+, these cells are not the precursor of DN alpha beta TCR+NK1.1+CD16+B220+ large granular lymphocytes (LGL). IL-2 induces rapid proliferation and generation of NK1.1+ LGL from DN alpha beta TCR+NK1.1- but not from DN alpha beta TCR+NK1.1+ cells. LGL cells exhibit NK activity and produce IFN-gamma but not IL-4 upon cross-linking of surface TCR or NK1.1 molecules. In contrast to IL-2, IL-7 does not induce LGL cells or NK activity from DN alpha beta TCR+NK1.1- cells but induces the ability to produce high levels of IL-4 upon TCR cross-linking. Our results show that DN alpha beta TCR+ T cells have several distinct subpopulations, and that IL-2 and IL-7 differentially regulate the functions of DN alpha beta TCR+ T cells by inducing different types of effector cells.
authors.affiliation: Dana-Farber Cancer Institute, Department of Medicine, Harvard Medical School, Boston, MA 02115, USA.
authors.forename: K
authors.initials: K
authors.lastname: Nishizawa
authors.forename: S
authors.initials: S
authors.lastname: Koyasu
mesh_terms: D000818:Animals; D000941:Antigens / Q000276:immunology / Q000378:metabolism*; D000950:Antigens, Ly; D000954:Antigens, Surface; D007111:Immunity, Cellular; D007135:Immunoglobulin Variable Region / Q000235:genetics / Q000276:immunology; D007376:Interleukin-2 / Q000494:pharmacology*; D015847:Interleukin-4 / Q000276:immunology / Q000378:metabolism*; D015851:Interleukin-7 / Q000494:pharmacology*; D037181:Lectins, C-Type; D008213:Lymphocyte Activation; D051379:Mice; D008810:Mice, Inbred C57BL; D055651:NK Cell Lectin-Like Receptor Subfamily B; D010641:Phenotype; D011506:Proteins / Q000276:immunology / Q000378:metabolism*; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000235:genetics; D016176:T-Lymphocyte Subsets / Q000187:drug effects* / Q000276:immunology / Q000378:metabolism; D018417:Th1 Cells / Q000187:drug effects* / Q000276:immunology / Q000378:metabolism; D018418:Th2 Cells / Q000187:drug effects* / Q000276:immunology / Q000378:metabolism
chemical_list: D000941:Antigens; D000950:Antigens, Ly; D000954:Antigens, Surface; D007135:Immunoglobulin Variable Region; D007376:Interleukin-2; D015851:Interleukin-7; 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; D015847:Interleukin-4