Recombinant human granulocyte colony-stimulating factor (G-CSF) combined conditioning regimen for allogeneic bone marrow transplantation (BMT) in standard-risk myeloid leukemia

S Takahashi, Y Oshima, S Okamoto, K Nishiwaki, H Nagayama, T Inoue, A Tojo, K Tani, S Asano
American Journal of Hematology 1998, 57 (4): 303-8
We previously suggested that using a combined conditioning regimen including rhG-CSF with allogeneic BMT in refractory AML and CML in blast crisis might reduce the rate of relapse and improve disease-free survival, without any major side effects. In this study, we used the same protocol for 10 AML patients in complete remission (CR) and 6 CML patients in the chronic phase (CP). We compared disease-free survival as well as toxic side effects of the regimen with 6 AML patients in CR and 6 CML patients in CP treated with chemoradiotherapy without G-CSF. The conditioning regimen consisted of TBI and high-dose AraC. RhG-CSF was infused continuously at a dose of 5 microg/kg/day, starting 24 hr before the initial dose of total body irradiation (TBI) until the end of AraC therapy. In all 28 cases, there were no early stage deaths due to regimen-related toxicity (RRT). None of the 10 AML cases treated with the G-CSF combined regime relapsed. In 6 AML cases treated conventionally without G-CSF, one patient died of infection and another relapsed. There were no relapses in either CML group. In the combined G-CSF group, one patient died of interstitial pneumonitis 48 days after BMT, while the rest of the CML cases are still alive. There were no relapses with rhG-CSF and no serious adverse effects in terms of RRT, acute graft vs. host disease (GVHD), or leukocyte recovery.

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