[Mini-transplantation from HLA-mismatched donors].

Bone marrow transplantation(BMT) from genotypically human leukocyte antigen (HLA)-matched siblings improves long-term survival in patients with hematologic malignancies. However, more than 70% of patients who could benefit from allogeneic BMT do not have a matched sibling donor. Furthermore, allogeneic BMT has been limited to young patients because of the increased risk for regimen-related toxicity and graft-versus-host disease(GVHD) that occurs with increasing age. HLA-haploidentical minitransplantation may solve these problems. In minitransplants using a preconditioning regimen consisting of fludarabine, busulfan and anti-T-lymphocyte globulin and a GVHD prophylaxis of tacrolimus and methylprednisolone, we showed that minitransplantation from HLA-haploidentical related donors was possible.