title: Evidence for differentiation of NK1+ cells into cytotoxic T cells during acute rejection of allogeneic bone marrow grafts.
abstract: The ability of lethally irradiated C57BL/6 mice to acutely reject H-2d bone marrow is due to a lymphocyte population that is NK1+, ASGM1+, CD4-, CD8-, CD3+. Transfer of spleen cells from C57BL/6 mice expressing these antigens into nonresponder 129 mice adoptively transfers the ability to reject H-2d marrow grafts. The specificity of this rejection maps to the H-2D major histocompatibility complex (MHC) region. Transplantation of high doses of H-2d marrow into C57BL/6 overrides the acute rejection mechanism leading to graft survival. During growth of the graft, a cytolytic activity develops that is due to ASGM1+, CD8+ cytolytic T lymphocytes (CTLs) with H-2Ld specificity. The possibility that the ASGM1+, CD8+ CTLs are descendents of the CD3+, NK1+, ASGM1+, CD8- cells responsible for acute rejection is investigated by adoptive cell transfer experiments. We show that beige mice that lack NK1+ cells as well as the ability to acutely reject H-2d marrow fail to generate specific CTLs after transplantation with a high dose of H-2d marrow. Transfer of highly purified NK1+ cells from B6.PL-Ly-2a/Ly-3a (Lyt-2.1) into beige mice together with H-2d marrow leads to generation of Lyt-2.1 CTLs from donor NK1+ cells. These results show that specific CTLs are generated from NK1+ cells during acute marrow graft rejection.
authors.affiliation: University of Southern California, Kenneth Norris Jr. Comprehensive Cancer Center, Los Angeles 90033.
authors.forename: G
authors.initials: G
authors.lastname: Dennert
authors.forename: C
authors.initials: C
authors.lastname: Knobloch
authors.forename: S
authors.initials: S
authors.lastname: Sugawara
authors.forename: B
authors.initials: B
authors.lastname: Yankelevich
mesh_terms: D000818:Animals; D000945:Antigens, Differentiation, T-Lymphocyte; D016026:Bone Marrow Transplantation / Q000276:immunology*; D016827:CD8 Antigens; D002454:Cell Differentiation / Q000276:immunology; D006084:Graft Rejection / Q000276:immunology*; D006183:H-2 Antigens; D064532:Histocompatibility Antigen H-2D; D007116:Immunization, Passive; D007519:Isoantigens; D007694:Killer Cells, Natural / Q000276:immunology*; D051379:Mice; D008815:Mice, Inbred Strains; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*; D014184:Transplantation, Homologous; D014916:Whole-Body Irradiation
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D016827:CD8 Antigens; D006183:H-2 Antigens; D064532:Histocompatibility Antigen H-2D; D007519:Isoantigens