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Inamoto, Y. et al.

Inamoto, Oba, Miyamura, Terakura, Tsujimura, Kuwatsuka, Tokunaga, Kasai, Murata, Naoe, Kodera,

Stable engraftment after a conditioning regimen with fludarabine and melphalan for bone marrow transplantation from an unrelated donor.

Graft failure and nonrelapse mortality (NRM) are major obstacles after the first unrelated-donor bone marrow transplantation (UD-BMT) with reduced-intensity conditioning. We evaluated UD-BMT with fludarabine (5 x 25 mg/m2) and melphalan (2 x 90 mg/m2) treatment combined with short-term methotrexate and tacrolimus (n = 20) or cyclosporine (n = 2) therapy for 22 patients with hematologic malignancies who were ineligible for conventional conditioning. Only 9 patients were in remission at transplantation. Seventeen patients underwent HLA-matched or DRB1 allele-mismatched transplantation, and 5 patients underwent HLA-A allele-mismatched or serologically HLA-DR-mismatched transplantation. Regimen-related toxicities were tolerable, although transient oral mucositis, hepatobiliary enzyme elevation, and diarrhea were observed frequently. All evaluable patients achieved sustained neutrophil engraftment, and all patients tested showed complete donor chimerism on day 28. With a median follow-up of 16 months, NRM and overall survival rates at 1 year were 19% and 81%, respectively, among the patients who underwent HLA-matched or DRB1 allele-mismatched transplantation. Acute graft-versus-host disease (GVHD) of grades II to IV occurred in 26% of the patients. The cumulative incidence of chronic GVHD was 44%. Despite the small number of patients and the short follow-up period, this reduced-intensity regimen enabled satisfactory engraftment and achievement of rapid complete donor chimerism with tolerable toxicities in the patients, including those who underwent HLA-mismatched UD-BMT.[1]

References

Stable engraftment after a conditioning regimen with fludarabine and melphalan for bone marrow transplantation from an unrelated donor. Inamoto, Y., Oba, T., Miyamura, K., Terakura, S., Tsujimura, A., Kuwatsuka, Y., Tokunaga, M., Kasai, M., Murata, M., Naoe, T., Kodera, Y. Int. J. Hematol. (2006) [Pubmed]

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