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  • Title: Interleukin-2 therapy after allogeneic bone marrow transplantation for acute myelocytic leukemia: studies in a relevant rat model for AML.
    Author: Kloosterman TC, Martens AC, Osterwalder B, Hagenbeek A.
    Journal: Bone Marrow Transplant; 1994 Dec; 14(6):965-73. PubMed ID: 7711675.
    Abstract:
    One of the major problems in the treatment of leukemia with BMT remains leukemia relapse. It has generally been established that allogeneic BMT, compared with autologous BMT, gives rise to a graft-versus-leukemia reaction (GVLR), usually associated with GVHD. To explore a possible role for post-BMT immunotherapy, recombinant human IL-2 therapy has been studied in the Brown Norway acute myelocytic leukemia (BNML), a rat leukemia model relevant for human AML. The antileukemic efficacy of rhIL-2 therapy is studied applying different doses of rhIL-2 after syngeneic or allogeneic BMT. rhIL-2 treatment post-syngeneic BMT showed a small, borderline significant GVLR. Repeated rhIL-2 treatment after allogeneic BMT resulted either in no significant antileukemic effect or in lethal GVHD when 'low' or 'high' doses were administered, respectively. An intermediate dose, however, induced a significant GVLR without the induction of (lethal) GVHD. Transplantation of allogeneic rat BM, which contains only a few lymphocytes, does not result in a significant GVLR or GVHD and thus resembles human HLA-matched allogeneic T cell-depleted (TCD) BMT. In conclusion, from the rat studies presented it appears that the GVLR lost by TCD of the allogeneic graft, may be more than fully compensated by IL-2 treatment post-allogeneic TCD BMT.
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