title: NK cells stimulate proliferation of T and NK cells through 2B4/CD48 interactions.
abstract: Few studies have addressed the consequences of physical interactions between NK and T cells, as well as physical interactions among NK cells themselves. We show in this study that NK cells can enhance T cell activation and proliferation in response to CD3 cross-linking and specific Ag through interactions between 2B4 (CD244) on NK cells and CD48 on T cells. Furthermore, 2B4/CD48 interactions between NK cells also enhanced proliferation of NK cells in response to IL-2. Overall, these results suggest that NK cells augment the proliferation of neighboring T and NK cells through direct cell-cell contact. These results provide new insights into NK cell-mediated control of innate and adaptive immunity and demonstrate that receptor/ligand-specific cross talk between lymphocytes may occur in settings other than T-B cell or T-T cell interactions.
authors.affiliation: Center for Infectious Medicine, Department of Medicine, Karolinska Institutet, Huddinge University Hospital, SE-141 86 Stockholm, Sweden.
authors.forename: Erika
authors.initials: E
authors.lastname: Assarsson
authors.forename: Taku
authors.initials: T
authors.lastname: Kambayashi
authors.forename: John D
authors.initials: JD
authors.lastname: Schatzle
authors.forename: Sven O
authors.initials: SO
authors.lastname: Cramer
authors.forename: Arne
authors.initials: A
authors.lastname: von Bonin
authors.forename: Peter E
authors.initials: PE
authors.lastname: Jensen
authors.forename: Hans-Gustaf
authors.initials: HG
authors.lastname: Ljunggren
authors.forename: Benedict J
authors.initials: BJ
authors.lastname: Chambers
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D015703:Antigens, CD / Q000378:metabolism*; D018801:CD2 Antigens / Q000502:physiology; D000071178:CD48 Antigen; D007694:Killer Cells, Natural / Q000502:physiology*; D008213:Lymphocyte Activation; D008562:Membrane Glycoproteins / Q000378:metabolism*; D051379:Mice; D008810:Mice, Inbred C57BL; D008969:Molecular Sequence Data; D011971:Receptors, Immunologic / Q000378:metabolism*; D000071176:Signaling Lymphocytic Activation Molecule Family; D013601:T-Lymphocytes / Q000276:immunology*; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology
chemical_list: D015703:Antigens, CD; D018801:CD2 Antigens; D000071178:CD48 Antigen; C490007:Cd244a protein, mouse; C000604066:Cd48 protein, mouse; D008562:Membrane Glycoproteins; D011971:Receptors, Immunologic; D000071176:Signaling Lymphocytic Activation Molecule Family