title: Feasibility of reduced intensity hematopoietic stem cell transplantation from an HLA-matched unrelated donor.
abstract: To evaluate the feasibility of reduced intensity stem cell transplantation (RIST) with bone marrow from a matched unrelated donor (MUD), we retrospectively investigated 20 patients with hematological disorders who received RIST in the Tokyo SCT consortium from January 2000 to October 2002. The preparative regimens were fludarabine-based (150-180 mg/m(2), n=18) or cladribine-based (0.77 mg/kg, n=2). To enhance engraftment, antithymocyte globulin (ATG) and 4 or 8 Gy total body irradiation (TBI) were added to these regimens in nine and 11 patients, respectively. GVHD prophylaxis was cyclosporine with or without methotrexate. In all, 19 achieved primary engraftment. Three developed graft failure (one primary, two secondary), and five died of treatment-related mortality within 100 days of transplant. Seven of the 19 patients who achieved initial engraftment developed grade II-IV acute GVHD, and seven of 13 patients who survived >100 days developed chronic GVHD. At a median follow-up of 5.5 months, estimated 1-year overall survival was 35%. Compared with a TBI-containing regimen, an ATG-containing regimen was associated with a high risk of graft failure (30 vs 0%, P=0.0737). This study supports the feasibility of RIST from MUD; however, procedure-related toxicities remain significant in its application to patients.
authors.affiliation: Department of Hematology, Toranomon Hospital, Tokyo, Japan.
authors.forename: E
authors.initials: E
authors.lastname: Kusumi
authors.forename: M
authors.initials: M
authors.lastname: Kami
authors.forename: K
authors.initials: K
authors.lastname: Yuji
authors.forename: T
authors.initials: T
authors.lastname: Hamaki
authors.forename: N
authors.initials: N
authors.lastname: Murashige
authors.forename: A
authors.initials: A
authors.lastname: Hori
authors.forename: R
authors.initials: R
authors.lastname: Kojima
authors.forename: Y
authors.initials: Y
authors.lastname: Kishi
authors.forename: S-W
authors.initials: SW
authors.lastname: Kim
authors.forename: J
authors.initials: J
authors.lastname: Ueyama
authors.forename: S
authors.initials: S
authors.lastname: Miyakoshi
authors.forename: R
authors.initials: R
authors.lastname: Tanosaki
authors.forename: S
authors.initials: S
authors.lastname: Morinaga
authors.forename: S
authors.initials: S
authors.lastname: Mori
authors.forename: Y
authors.initials: Y
authors.lastname: Heike
authors.forename: Y
authors.initials: Y
authors.lastname: Muto
authors.forename: S
authors.initials: S
authors.lastname: Masuo
authors.forename: S
authors.initials: S
authors.lastname: Taniguchi
authors.forename: Y
authors.initials: Y
authors.lastname: Takaue
mesh_terms: D000328:Adult; D000368:Aged; D000961:Antilymphocyte Serum / Q000008:administration & dosage; D016026:Bone Marrow Transplantation / Q000009:adverse effects / Q000379:methods / Q000401:mortality; D017338:Cladribine / Q000008:administration & dosage; D005240:Feasibility Studies; D005260:Female; D006086:Graft vs Host Disease / Q000188:drug therapy / Q000209:etiology / Q000517:prevention & control; D006402:Hematologic Diseases / Q000628:therapy; D018380:Hematopoietic Stem Cell Transplantation / Q000009:adverse effects / Q000379:methods* / Q000401:mortality; D006648:Histocompatibility; D006650:Histocompatibility Testing; D006801:Humans; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000628:therapy; D012189:Retrospective Studies; D016019:Survival Analysis; D019172:Transplantation Conditioning / Q000009:adverse effects / Q000379:methods* / Q000401:mortality; D014181:Transplantation Immunology; D016896:Treatment Outcome; D014740:Vidarabine / Q000008:administration & dosage / Q000031:analogs & derivatives*; D014916:Whole-Body Irradiation
chemical_list: D000961:Antilymphocyte Serum; D017338:Cladribine; D014740:Vidarabine; C024352:fludarabine