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Biol Blood Marrow Transplant. 2008 Aug;14(8):920-6. doi: 10.1016/j.bbmt.2008.05.024.

Sirolimus, tacrolimus, and low-dose methotrexate as graft-versus-host disease prophylaxis in related and unrelated donor reduced-intensity conditioning allogeneic peripheral blood stem cell transplantation.

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Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA.


We assessed the combination of sirolimus, tacrolimus, and low-dose methotrexate as acute graft-versus-host disease (aGVHD) prophylaxis after reduced-intensity conditioning (RIC) allogeneic peripheral blood stem cell (PBSC) transplantation from matched related (MRD, n = 46) and unrelated (URD, n = 45) donors. All patients received fludarabine and intravenous busulfan conditioning followed by transplantation of mobilized PBSC. The median time to neutrophil engraftment was 13 days. The cumulative incidence of grade II-IV and III-IV aGVHD were 16% and 7%, respectively. There was no difference in the incidence of aGVHD between MRD and URD cohorts. Two-year cumulative incidence of extensive chronic GVHD (cGVHD) was 40%. Relapse-free survival (RFS) at 2 years was 34%: 21% in MRD and 45% in URD. Overall survival (OS) at 2 years was 59%: 47% in MRD and 67% in URD. High levels (>90%) of donor derived hematopoiesis were achieved in 59% of patients early after transplantation. The addition of sirolimus to tacrolimus and low-dose methotrexate as GVHD prophylaxis following RIC with fludarabine and low-dose intravenous busulfan is associated with rapid engraftment, low rates of aGVHD, and achievement of high levels of donor chimerism.

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