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  • Title: Multicenter prospective study of interferon-alpha and conventional chemotherapy versus bone marrow transplantation for newly diagnosed patients with chronic myelogenous leukemia. Kouseisho Leukemia Study Group.
    Author: Ohnishi K, Minami S, Ueda T, Nishimura M, Tsubaki K, Takemoto Y, Takeshita A, Sao H, Kageyama S, Ueda R, Ohno R.
    Journal: Int J Hematol; 2000 Aug; 72(2):229-36. PubMed ID: 11039674.
    Abstract:
    We compared interferon-alpha (IFN-alpha therapy with bone marrow transplantation (BMT) after initial conventional chemotherapy in patients with chronic myelogenous leukemia (CML) in a multicenter prospective study. Ninety patients with Philadelphia chromosome-positive CML in chronic phase were enrolled between 1991 and 1994. Sixty-six of 89 evaluable patients received IFN-alpha after conventional chemotherapy with hydroxyurea or busulfan (IFN-alpha group). Twenty-three patients received allogeneic BMT (BMT group). Fifteen of them received transplants from HLA-identical family donors and 8 from HLA-matched unrelated donors. Forty-seven of 66 patients (71%) in the IFN-alpha group and 17 of 23 patients (74%) in the BMT group achieved complete hematologic response, and 12% in the IFN-alpha group and 13% in the BMT group achieved partial hematologic response. Complete cytogenetic response was induced in 5 (8%), partial cytogenetic response in 8 (12%), and minor cytogenetic response in 12 (18%) in the IFN-alpha group. At a median follow-up of 54 months (range, 30-76 months), in the IFN-alpha group, the predicted 6-year survival rate was 54.5% and the predicted 6-year rate of those remaining in chronic phase was 45.7%. Compared with patients with no cytogenetic response, the patients with some cytogenetic response after IFN-alpha treatment had significantly superior survival and duration of the chronic phase even after correction for the time to response using landmark analysis (P < .05). In the BMT group, the predicted 5-year survival rate was 93.3% for family-donor BMT and 21.9% for unrelated-donor BMT Acute graft-versus-host disease of grade III or IV was observed in 1 of 15 patients who received family-donor BMT and 3 of 8 patients who received unrelated donor BMT. Prior treatment with conventional cytotoxic drugs induced early hematologic response and did not reduce the effect of IFN-alpha on CML. Unrelated-donor transplantation should be offered to some patients according to patient age, HLA-matching status, time from diagnosis to BMT, and risk factors.
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