title: Activated, but not resting, T cells can be recognized and killed by syngeneic NK cells.
abstract: We demonstrate that IL-2-activated NK cells or lymphokine-activated killer cells recognize and kill syngeneic CD4(+) and CD8(+) T cells that have been activated by APCs. Induction with APC required TCR-specific Ag, and lysis was perforin mediated. Brefeldin A, which disrupts protein transport, inhibited the sensitivity induced by activation. In BALB/c, expression of NKG2D ligands correlated with lysis and could be inhibited by brefeldin A. As well, addition of anti-NKG2D mAb to a killing assay completely abrogated lysis. Transduction of mouse NKG2D into a human NK cell line, YTSeco, conferred upon it the ability to kill activated BALB/c T cells, indicating that NKG2D is necessary for recognition. Our data provide a basis for studying a role for NK cells in T cell regulation.
authors.affiliation: Department of Medical Biophysics, Ontario Cancer Institute, Toronto, Canada.
authors.forename: Brian A
authors.initials: BA
authors.lastname: Rabinovich
authors.forename: Jennifer
authors.initials: J
authors.lastname: Li
authors.forename: John
authors.initials: J
authors.lastname: Shannon
authors.forename: Rose
authors.initials: R
authors.lastname: Hurren
authors.forename: Jan
authors.initials: J
authors.lastname: Chalupny
authors.forename: David
authors.initials: D
authors.lastname: Cosman
authors.forename: Richard G
authors.initials: RG
authors.lastname: Miller
mesh_terms: D000818:Animals; D002460:Cell Line; D003601:Cytotoxicity Tests, Immunologic; D003602:Cytotoxicity, Immunologic / Q000235:genetics; D006801:Humans; D007399:Interphase / Q000276:immunology*; D015979:Killer Cells, Lymphokine-Activated / Q000276:immunology / Q000378:metabolism; D007694:Killer Cells, Natural / Q000276:immunology* / Q000378:metabolism; D008024:Ligands; D008213:Lymphocyte Activation / Q000235:genetics; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D016513:Mice, SCID; D008822:Mice, Transgenic; D015778:Minor Histocompatibility Antigens / Q000378:metabolism; D055655:NK Cell Lectin-Like Receptor Subfamily K; D011971:Receptors, Immunologic / Q000235:genetics / Q000378:metabolism / Q000502:physiology; D055607:Receptors, Natural Killer Cell; D011993:Recombinant Fusion Proteins / Q000378:metabolism / Q000502:physiology; D013045:Species Specificity; D016176:T-Lymphocyte Subsets / Q000276:immunology* / Q000378:metabolism
chemical_list: C527085:KLRK1 protein, human; C527086:Klrk1 protein, mouse; D008024:Ligands; D015778:Minor Histocompatibility Antigens; D055655:NK Cell Lectin-Like Receptor Subfamily K; D011971:Receptors, Immunologic; D055607:Receptors, Natural Killer Cell; D011993:Recombinant Fusion Proteins; C114735:minor H antigen H60