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  • Title: Effect of graft-versus-host disease prophylaxis on relapse in patients transplanted for acute myeloid leukemia.
    Author: Weaver CH, Clift RA, Deeg HJ, Storb R, Appelbaum FR, Bensinger W, Doney K, Hansen JA, Martin PO, Sanders J.
    Journal: Bone Marrow Transplant; 1994 Dec; 14(6):885-93. PubMed ID: 7711667.
    Abstract:
    Between November 1978 and September 1988, 184 patients with acute myeloid leukemia in first remission received marrow transplants from HLA-identical siblings after conditioning with 120 mg/kg of cyclophosphamide and 12.0 Gy fractionated total body irradiation. Patients received either cyclosporine (CYA, n = 59), methotrexate (MTX, n = 82), or MTX + CYA (n = 43 as graft-versus-host disease (GVHD) prophylaxis. The probabilities of grades II-IV acute GVHD after CYA, MTX or MTX+CYA were 0.43, 0.48 and 0.28, respectively (p = 0.06). The probability of non-relapse mortality was 0.53, 0.50 and 0.42 at 4 years in patients treated with CYA, MTX, or MTX + CYA, respectively. The probability of relapse was 0.24 in patients receiving CYA, 0.24 in patients receiving MTX and 0.44 in patients receiving MTX + CYA (p = 0.02). The probability of survival at 4 years was 0.54 with CYA, 0.51 with MTX and 0.45 with MTX + CYA. A multivariate analysis of risk factors for relapse examined age, WBC at diagnosis, blast count at diagnosis, percentage of marrow blasts, FAB subtype, the number of remission induction courses to achieve a remission, maintenance therapy, consolidation therapy, marrow cell dose, donor-recipient sex, GVHD prophylaxis regimen and isolation and decontamination in laminar airflow rooms. GVHD prophylaxis with MTX + CYA was independently significantly associated with an increased risk of relapse (relative risk 2.25, p = 0.01). Acute GVHD was associated with increased non-relapse mortality (RR = 3.58, p < 0.0001). The administration of MTX + CYA did not adversely affect survival because patients receiving this regimen experienced less mortality from causes other than relapse when compared with patients receiving either CYA or MTX alone.
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