title: Prevention of lethal graft-versus-host disease in mice by monoclonal antibodies directed against T cells or their subsets. I. Evidence for the induction of a state of tolerance based on suppression.
abstract: Lethal GVHD in the fully allogeneic BALB/c (donor)-(C57BL x CBA)F1 (recipient) mouse strain combination could be prevented by a single dose of IgG2b monoclonal antibodies (moAb) directed to T cells. The influence of the time of administration of this moAb after GVHD induction and the effect of anti-T cell subset moAb on the development of GVHD was investigated in this study. Moreover, the state of tolerance in the mice that had become long-term chimeras was examined. Anti-Thy-1 treatment of the recipients 1 day before, 2 h before or 1 day after reconstitution almost completely prevented lethal GVHD. A single dose of 100 micrograms of anti-Thy-1 was as effective as four daily doses of 25 micrograms each. Treatment with a single dose of 25 micrograms or with intervals of 4 days between doses of 25 micrograms was statistically significantly less effective. We injected the recipients with moAb directed to the CD4+ or CD8+ T cells subsets. Using a dose of 100 micrograms moAb, anti-CD4 treatment appeared to be less effective than anti-Thy-1 treatment whereas anti-CD8 treatment was not effective at all. A double dose of anti-CD4 was equally effective as anti-Thy-1 treatment. All mice that became long term survivors remained free of signs of GVHD and were > 99% repopulated with donor type cells. Injection of spleen cells from these BALB/c into (C57BL x CBA)F1 chimeric mice was used to reconstitute lethally irradiated BALB/c, BALB.K and (C57BL x CBA)F1 recipients. Lethal GVHD developed in the BALB.K and (C57BL x CBA)F1 recipients but not in the BALB/c recipients.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Department of Immunology, Erasmus University, Rotterdam, The Netherlands.
authors.forename: A C
authors.initials: AC
authors.lastname: Knulst
authors.forename: G J
authors.initials: GJ
authors.lastname: Tibbe
authors.forename: W A
authors.initials: WA
authors.lastname: Noort
authors.forename: C
authors.initials: C
authors.lastname: Bril-Bazuin
authors.forename: R
authors.initials: R
authors.lastname: Benner
authors.forename: H F
authors.initials: HF
authors.lastname: Savelkoul
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology* / Q000627:therapeutic use*; D015704:CD4 Antigens / Q000032:analysis / Q000276:immunology; D016827:CD8 Antigens / Q000032:analysis / Q000276:immunology; D002678:Chimera; D004305:Dose-Response Relationship, Drug; D005260:Female; D005455:Fluorescent Antibody Technique; D006086:Graft vs Host Disease / Q000276:immunology / Q000517:prevention & control*; D007108:Immune Tolerance; D007165:Immunosuppression Therapy; D007518:Isoantibodies / Q000276:immunology / Q000494:pharmacology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D013154:Spleen / Q000166:cytology; D016176:T-Lymphocyte Subsets / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*; D013997:Time Factors
chemical_list: D000911:Antibodies, Monoclonal; D015704:CD4 Antigens; D016827:CD8 Antigens; D007518:Isoantibodies; C035678:anti-Thy antibody