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  • Title: Effect of graft-versus-host disease prophylaxis on 3-year disease-free survival in recipients of unrelated donor bone marrow (T-cell Depletion Trial): a multi-centre, randomised phase II-III trial.
    Author: Wagner JE, Thompson JS, Carter SL, Kernan NA, Unrelated Donor Marrow Transplantation Trial.
    Journal: Lancet; ; 366(9487):733-41. PubMed ID: 16125590.
    Abstract:
    BACKGROUND: Graft-versus-host disease (GVHD) reduces the efficacy of unrelated donor bone marrow transplantation in patients with lymphohaemopoietic malignancy. A multi-centre, randomised trial was undertaken to determine the effects of ex-vivo T-cell depletion versus methotrexate and cyclosporine immunosuppression on 3-year disease-free survival. METHODS: Between Mar 1, 1995, and Oct 31, 2000, 405 patients with lymphohaemopoietic malignancy, from 15 participating centres, were randomly assigned to undergo transplantation with either T-cell depleted marrow and cyclosporine A (TCD arm; n=201) or methotrexate and cyclosporine A after transplantation of T-replete marrow (M/C arm; n=204). The primary outcome was 3-year disease-free survival and was analysed by intention to treat. FINDINGS: Five patients died before transplantation. Seven in the TCD arm received T-replete grafts. Disease-free survival at 3 years was 27% (95% CI 21-33) and 34% (27-40) in recipients of TCD and M/C, respectively (p=0.16). TCD was associated with significantly more rapid neutrophil recovery (15 days vs 20 days, p<0.0001), less grade III-IV acute GVHD (18%vs 37%, p<0.0001), reduced grade III-IV toxicities (19%vs 29%, p=0.017), reduced duration of initial hospitalisation, but higher risk of chronic myelogenous leukaemia relapse (20%vs 7%, p=0.009) and cytomegalovirus infection (28%vs 17%, p=0.023) than was M/C. INTERPRETATION: Disease-free survival at 3 years did not differ between TCD and M/C groups. Relapse and opportunistic infection are important obstacles to successful unrelated donor bone marrow transplantation, irrespective of the method of GVHD prophylaxis used.
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