title: Induction and mechanism of tolerance to bovine serum albumin in mice given total lymphoid irradiation (TLI).
abstract: BALB/c mice given total lymphoid irradiations (TLI) were injected i.p. with bovine serum albumin (BSA) in saline, and challenged with DNP-BSA in complete Freund's adjuvant 6 weeks later. The latter animals made no anti-DNP antibody response as measured by a modified Farr assay, but made a normal anti-DNP response after challenge with DNP-BGG in adjuvant. Normal mice or mice given whole body irradiation were not tolerized by the i.p. injection of BSA in saline. Spleen cells from unresponsive mice (TLI + BSA in saline) suppressed the adoptive secondary anti-DNP response of sublethally irradiated syngeneic hosts given BSA-primed T cells, DNP-BSA-primed B cells, and DNP-BSA in saline. The suppressor cells were antigen specific, and were inactivated by in vitro treatment with anti-Thy 1.2 antiserum and complement. The findings suggest that soluble antigens administered to mice after TLI evoke a state of tolerance that is maintained by antigen-specific suppressor T cells. A similar mechanism may be involved in the maintenance of tolerance to allografts. These findings may have important clinical implications for patients treated with TLI for lymphoid malignancies.
mesh_terms: D000818:Animals; D002417:Cattle; D004136:Dinitrobenzenes / Q000276:immunology; D000939:Epitopes; D005260:Female; D007108:Immune Tolerance; D007116:Immunization, Passive; D007700:Kinetics; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D011828:Radiation Chimera; D012710:Serum Albumin, Bovine / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology; D013950:Thymus Gland / Q000276:immunology
chemical_list: D004136:Dinitrobenzenes; D000939:Epitopes; D012710:Serum Albumin, Bovine