Busulfex (i.v. BU) and CY regimen before SCT: Japanese-targeted phase II pharmacokinetics combined study

S. W. Kim, S. J. Mori, R. Tanosaki, T. Fukuda, M. Kami, H. Sakamaki, T. Yamashita, Y. Kodera, S. Terakura, S. Taniguchi, S. Miyakoshi, N. Usui, S. Yano, Y. Kawano, Y. Nagatoshi, M. Harada, Y. Morishima, S. Okamoto, A. M. Saito, Y. OhashiR. Ueda, Y. Takaue

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


To evaluate the toxicity and efficacy of an i.v. preparation of BU (12.8 mg/kg), combined with CY (120 mg/kg), a prospective study was performed on 30 Japanese patients (median age, 30 years) with hematologic malignancies undergoing hematopoietic SCT (28 allogeneic transplants from an HLA-matched donor and 2 autologous transplants). There were no significant toxicities, and all but one patient showed evidence of granulocyte engraftment at a median of 14 days for allogeneic and 11 days for autologous transplantation. Grades II-IV acute and chronic GVHD occurred in 9 (9/27, 33%) and 16 patients (16/27, 59%), respectively. Non-relapse mortality at days 100 and 365 was 3 and 17%, respectively. The pharmacokinetics of i.v. BU showed close inter- and intrapatient consistency; the area under the plasma concentration-time curve of the first administration remained at less than 1500 μmol min/l in 27 of the 29 patients (93%), and between 900 and 1350 μmol min/l in 22 patients (73%). As all of the profiles overlap with data from non-Japanese patients, we conclude that racial factors may not seriously influence the bioactivity of i.v. BU.

Original languageEnglish
Pages (from-to)611-617
Number of pages7
JournalBone Marrow Transplantation
Issue number8
Publication statusPublished - 2009
Externally publishedYes

ASJC Scopus subject areas

  • Hematology
  • Transplantation


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