title: Effect of in vivo exposure to allogeneic cells upon subsequent in vitro T cell responses and upon allograft rejection.
abstract: The effect of intravenous injection of 10(6) BALB/c spleen cells into C57B1/6J recipients was assayed by both mixed lymphocyte culture (MLC) of recipient lymphocytes, and by grafting donor (BALB/c) thyroids into recipient mice. It was observed that a single intravenous injection produced depression of proliferative and cytotoxic T cell responses in MLC of spleen, lymph node and peripheral blood lymphocytes of the recipients. This effect was specific for the sensitizing genotype (MLC of recipient and third-party CBA/H lymphocytes was unaffected), and persisted for several days after sensitization. The pattern of this diminished response suggested that the effect was due to a combination of recruitment of reactive lymphocytes from peripheral lymphoid populations, and the generation of alloantigen (H-2?)-specific suppressor T cells in the spleen. In contrast to these findings in vitro, a similar sensitization led only to accelerated rejection of thyroid allografts in vivo.
mesh_terms: D000818:Animals; D003602:Cytotoxicity, Immunologic; D006084:Graft Rejection; D008198:Lymph Nodes / Q000276:immunology; D007959:Lymphocyte Culture Test, Mixed; D008214:Lymphocytes / Q000528:radiation effects; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D013961:Thyroid Gland / Q000637:transplantation*; D014184:Transplantation, Homologous