Yoshinobu Kanda

Saitama Medical University, Saitama, Saitama, Japan

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Publications (318)1180.91 Total impact

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    ABSTRACT: Cord blood has been investigated as an alternative source for hematopoietic stem cell transplantation, but information about its use for multiple myeloma is limited. The purpose of this study was to evaluate the feasibility of cord blood transplantation (CBT) for patients with multiple myeloma. Eighty-six patients with multiple myeloma who underwent a first CBT between 2001 and 2011 were included in this retrospective study. Sixty-two of them had received other types of stem cell transplantation before CBT. The cumulative incidences of neutrophil engraftment at day 50, grade II-IV acute GVHD, and chronic GVHD were 81.4%, 39.0%, and 19.5%, respectively. The incidence of non-relapse mortality (NRM) at 2 years was 39.0%, but it was only 6.2% in patients who underwent planned tandem autologous/reduced-intensity conditioning CBT (auto/RIC-CBT). Progression-free survival (PFS) and overall survival (OS) at 6 years were 13.0% and 15.2%, respectively. Less than a partial response before CBT and lack of prior transplantation were independent significant adverse factors for PFS, whereas the presence of prior transplantation and planned tandem transplantation were associated with better OS. OS at 6 years in patients who underwent auto/RIC-CBT was 45.9%. In addition, the development of chronic GVHD was associated with superior PFS. In conclusion, we demonstrated that cord blood is feasible as an alternative graft source for myeloma patients. Although CBT provided long-term survival for a fraction of patients, optimal use of this graft requires further clinical studies. Copyright © 2015 American Society for Blood and Marrow Transplantation. Published by Elsevier Inc. All rights reserved.
    Biology of blood and marrow transplantation: journal of the American Society for Blood and Marrow Transplantation 02/2015; · 3.15 Impact Factor
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    ABSTRACT: In Japan, intravenous busulfan (ivBu) is usually given four times per day as an infusion at 0.8 mg/kg over 2 h. However, as this requires a midnight administration, a once-daily infusion of ivBu at 3.2 mg/kg over 3 h has been investigated as a more convenient and safer method. In this study, 20 Japanese patients received once-daily ivBu in conditioning regimens before allogeneic hematopoietic stem cell transplantation (HSCT), and blood samples were obtained just before, and 3, 3.5, 5, 7, 10, and 24 h after the initiation of ivBu infusion. The outcomes of HSCT were evaluated prospectively. The median area under the plasma concentration versus time curve (AUC) of Bu was 5272 μmol × min/L (range 3491-6284 μmol × min/L), and was similar to those in previous once-daily ivBu studies and to the estimated daily AUC in previous 4-times-daily ivBu studies. All of the patients but two, who died early due to infection, achieved neutrophil engraftment at a median of 25 days after transplantation. No patient was diagnosed with veno-occlusive disease according to the criteria established by Jones. No regimen-related toxicity was significantly associated with AUC. In conclusion, once-daily administration of ivBu has a stable pharmacokinetic profile, and was safely performed in Japanese patients.
    International journal of hematology. 02/2015;
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    ABSTRACT: Adult mixed phenotype acute leukemia (MPAL) patients have a poor prognosis, and the therapeutic role of allogeneic stem cell transplantation (allo-SCT) for MPAL remains to be elucidated. Thus, we retrospectively assessed the efficacy of allo-SCT for MPAL. Eighteen patients with MPAL were identified from the transplant outcome database of KSGCT. We also selected 215 patients with acute myeloid leukemia (AML) and acute lymphoblastic leukemia (ALL) as control cohorts using an optimal matching method. The 5-year overall survival (OS) rate of patients with MPAL was 48.1%, and patients in remission at the time of transplant showed significantly better survival than those not in remission (5-year OS: 71.8% vs. 0%, p = 0.001). No significant differences were seen in OS when stratifying patients according to immunophenotype, cytogenetic abnormalities, or the type of induction therapy. The 5-year OS rate of MPAL patients was not significantly different compared with AML control patients (48.1% vs. 48.1%; p = 0.855) or ALL control patients (48.1% vs. 37.8%; p = 0.426). These results suggested that allo-SCT is an effective treatment for MPAL, especially early in the disease course, and innovative transplant approaches are warranted to improve the transplant outcome of MPAL patients who are not in remission. This article is protected by copyright. All rights reserved. This article is protected by copyright. All rights reserved.
    European Journal Of Haematology 01/2015; · 2.41 Impact Factor
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    ABSTRACT: Background Bloodstream infections (BSI) are frequently observed after allogeneic hematopoietic stem cell transplant (HSCT), and could cause morbidity and mortality.Methods We retrospectively evaluated the incidence, characteristics of, and risk factors for BSI at both pre- and post-engraftment in 209 adult HSCT patients at our institute between June 2006 and December 2013. The median age at transplantation was 45 years (range, 15–65). A total of 122 patients received bone marrow, 68 received peripheral blood stem cells, and 19 received umbilical cord blood.ResultsThe cumulative incidences of pre- and post-engraftment BSI were 38.9% and 17.2%, respectively. Nine patients had both pre- and post-engraftment BSI. In the pre- and post-engraftment periods, respectively, 67.4% and 84.1% of isolates were gram-positive bacteria (GPB), 28.3% and 11.4% were gram-negative bacteria (GNB), and 4.3% and 4.5% were fungi. Coagulase-negative staphylococci were the most commonly isolated GPB, while Stenotrophomonas maltophilia and Pseudomonas aeruginosa were the most commonly isolated GNB. Pre-engraftment BSI was associated with an increased risk of death. Overall survival at day 180 for patients with or without pre-engraftment BSI was 70.0% and 82.7%, respectively (P = 0.02).Conclusions Risk factors for BSI in the pre-engraftment period were the interval between diagnosis and transplantation (261 days or more), engraftment failure, and high-risk disease status at HSCT in a multivariate analysis. No significant risk factor for BSI in the post-engraftment period was identified by a univariate analysis. These findings may be useful for deciding upon empiric antibacterial treatment for HSCT recipients.
    Transplant Infectious Disease 01/2015; · 1.98 Impact Factor
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    ABSTRACT: We compared the expected medical costs of empirical and preemptive treatment strategies for invasive fungal infection in neutropenic patients with hematological diseases. Based on the results of two clinical trials with different backgrounds reported by Oshima et al. [J Antimicrob Chemother 60(2):350-355; Oshima study] and Cordonnier et al. [Clin Infect Dis 48(8):1042-1051; PREVERT study], we developed a decision tree model that represented the outcomes of empirical and preemptive treatment strategies, and estimated the expected medical costs of medications and examinations in the two strategies. We assumed that micafungin was started in the empirical group at 5 days after fever had developed, while voriconazole was started in the preemptive group only when certain criteria, such as positive test results of imaging studies and/or serum markers, were fulfilled. When we used an incidence of positive test results of 6.7 % based on the Oshima study, the expected medical costs of the empirical and preemptive groups were 288,198 and 150,280 yen, respectively. Even in the case of the PREVERT study, in which the incidence of positive test results was 32.9 %, the expected medical costs in the empirical and preemptive groups were 291,871 and 284,944 yen, respectively. A sensitivity analysis indicated that the expected medical costs in the preemptive group would exceed those in the empirical group when the incidence of positive test results in the former was over 34.4 %. These results suggest that a preemptive treatment strategy can be expected to reduce medical costs compared with empirical therapy in most clinical settings.
    European Journal of Clinical Microbiology 01/2015; · 2.54 Impact Factor
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    ABSTRACT: Risk of relapse during the unrelated donor coordination period biases comparisons between allogeneic hematopoietic stem cell transplantation from an HLA 8 of 8 allele-matched unrelated donor (8/8 MUD) and that from a related donor with an HLA-1 antigen mismatch in the graft-versus-host (GVH) direction (RD/1AGMM-GVH). To reduce this bias, we performed a decision analysis focusing on acute myeloid leukemia (AML) and acute lymphoblastic leukemia (ALL) in first complete remission (CR1). The primary outcome measure was 5-year survival probability with or without quality-of-life (QOL) adjustment. A baseline analysis showed that the decision to perform MUD transplantation was superior to that to perform RD/1AGMM-GVH transplantation for patients with AML or ALL. However, in the ALL cohort, the direction of superiority was reversed when the interval between CR1 and 8/8 MUD transplantation was >5.5 months (without QOL adjustment) or >6 months (after QOL adjustment) or when overall survival of RD/1AGMM-GVH transplantation improved by 1.3% without QOL adjustment and 2.1% after QOL adjustment. In conclusion, 8/8 MUD should be prioritized in transplantation for AML and ALL in CR1. However, the MUD coordination period and improvements in RD/1AGMM-GVH transplantation might change the donor selection priority in transplantation for ALL in CR1.Blood Cancer Journal (2014) 4, e263; doi:10.1038/bcj.2014.85.
    Blood Cancer Journal 12/2014; 4:e263. · 2.88 Impact Factor
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    ABSTRACT: Objectives Limited data are available on the effect of how cyclophosphamide (CY) and total body irradiation (TBI) are administered. We analyzed the effect of the interval from TBI to hematopoietic stem cell transplantation (HSCT) on the outcome of HSCT. Methods Adult patients who underwent HSCT using myeloablative conditioning consisting of TBI and CY were retrospectively analyzed. They were divided into three groups according to the duration between the start of TBI and HSCT (Group A: 2-4 days, Group B: 5-8 days, Group C: 9-10 days). Results Seventy-five adult patients were included. The 3-year overall survival rate was 56, 47, and 77% in Groups A, B, and C, respectively (P = 0.14). Similarly, there was no significant difference among the three groups with respect to progression-free survival (57, 47, and 72%, P = 0.17), relapse rate (32, 37, and 16%, P = 0.29), or non-relapse mortality (8, 14, and 12%, P = 0.81). In addition, we observed no significant difference among the three groups with respect to the incidence of grade II-IV acute graft-versus-host disease (GVHD) (31, 47, and 32%, respectively, P = 0.56) and that of chronic GVHD (23, 23, and 22%, respectively, P = 0.97). Discussion and conclusion Although recipient immune system at HSCT might be affected by the timing of TBI, the duration between the start of TBI and HSCT did not influence the outcome of HSCT using myeloablative conditioning with TBI and CY.
    Hematology (Amsterdam, Netherlands) 12/2014; · 1.33 Impact Factor
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    ABSTRACT: Cytomegalovirus (CMV)-specific CD8(+) cytotoxic T lymphocytes (CMV-CTLs) play a crucial role in preventing CMV disease. However, the actual in vivo dynamics of CMV-CTL clones after allogeneic hematopoietic stem cell transplantation (alloHCT) are still unclear. Using a single-cell T-cell receptor repertoire analysis, we monitored clones and chimerism of CMV-CTLs in 3 CMV-seropositive alloHCT recipients from CMV-seronegative donors, with or without CMV reactivation. Nearly all of the CMV-CTLs during follow-up were CD45RA(-) CCR7(-) effector memory/CD45RA(+) CCR7(-) effector T cells, and were highly matured. In each case, the use of BV gene families was restricted, especially in BV5, 7, 28, and 29. Although no common predominant CMV-CTL clones were found, several shared motifs of complementarity-determining region-3 were identified among the 3 cases; QGA in all, TGE and TDT in Case 1 and Case 2, and RDRG in Case 2 and Case 3. In all cases, CMV-CTL clones that were detected for the first time after alloHCT persisted as the dominant clones. In Case 1, without CMV reactivation, recipient-derived CMV-CTLs exclusively persisted as a dominant clone, while all CMV-CTLs in the other 2 cases, with CMV reactivation, were donor derived. Clone monitoring and chimerism analyses should help to further clarify novel aspects of immuno-reconstitution after alloHCT. © 2014 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.
    Transplant Infectious Disease 11/2014; · 1.98 Impact Factor
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    ABSTRACT: Because the efficacy of donor lymphocyte infusion (DLI) for acute myeloid leukemia (AML) relapse after allogeneic hematopoietic stem cell transplantation (HSCT) remains uncertain, especially in the Asian population, a nationwide registry study was retrospectively performed by the Adult AML Working Group of the Japan Society for Hematopoietic Cell Transplantation (JSHCT) to identify the factors affecting the patient survival after DLI. Among 143 adult AML patients who received DLI for the treatment of the first hematological relapse after HSCT, the overall survival (OS) rates at one year, two years and five years were 32% ± 4%, 17% ± 3% and 7% ± 3% respectively. Complete remission (CR) at the time of DLI, which was obtained in 8% of the patients, was the strongest predictive factor for survival after DLI. Therefore, long-term survival after DLI was achieved almost exclusively in patients who successfully achieved a CR prior to DLI, indicating the limited efficacy of DLI in a minority of patients.
    Biology of Blood and Marrow Transplantation 11/2014; 20(11). · 3.35 Impact Factor
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    ABSTRACT: Elderly patients with non-Hodgkin lymphoma (NHL) have a poor prognosis. Owing to treatment-related toxicities, there is no standard chemotherapy for the elderly patients, especially those aged 70 years or older. In this study, we retrospectively evaluated the efficacy and toxicity of reduced-dose (two-thirds) R-CHOP chemotherapy as an initial chemotherapy for 45 patients aged 70 years or older with B-cell NHL. The WHO classification of NHL included diffuse large B-cell lymphoma (DLBCL) (31), mantle cell lymphoma (5), follicular lymphoma (4), extranodal marginal zone lymphoma (1), Burkitt lymphoma (1), and B-cell lymphoma whose further types were unclassified (3). The incidences of grade 4 neutropenia and febrile neutropenia (FN) were 51·1 and 15·6%, respectively. Efficacy was evaluated in patients with DLBCL. The overall and complete response (CR) rates were 96·7 and 90·0%, respectively. Two-year event-free survival (EFS) and overall survival (OS) were 84·4 and 89·2%, respectively. There was no treatment-related mortality. In conclusion, two-thirds R-CHOP chemotherapy is a promising treatment for elderly patients with B-cell NHL in terms of its efficacy and toxicity.
    Journal of chemotherapy (Florence, Italy) 10/2014; · 1.07 Impact Factor
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    ABSTRACT: Recent advances in allogeneic hematopoietic stem cell transplantation (allo-HSCT) have led to increasing use of this modality in older patients who tend to have been more heavily pretreated, and have more comorbidities. Thus, the evaluation of comorbidity is of increasing importance to more precisely assess the benefits and risks of the transplant procedure. Researchers from Seattle have developed the hematopoietic cell transplantation-specific comorbidity index (HCT-CI) that was associated with the risk of mortality in several retrospective studies. However, its clinical utility has not been extensively documented in prospective studies. The aim of the present study was to evaluate the utility of the HCT-CI prospectively in a multicenter setting. Overall survival (OS) and non-relapse mortality (NRM) at 2 years was 59% and 20%, respectively (n=243). We found that the HCT-CI in its original scale failed to predict OS and NRM in this set of patients. Thus, we applied a flexible HCT-CI risk scoring system (re-stratified low-risk, defined as score 0-3, and a high-risk score: 4 or higher). The flexible HCT-CI was found to predict 2-year NRM and OS better than the original HCT-CI (NRM: p=0.01, OS: p=0.003). In subgroup analysis, we evaluated the usefulness of the original HCT-CI with patients excluding cord blood (n=186). Both 2y-OS and 2y-NRM were not significantly different according to the original HCT-CI (p=0.304, p=0.996), but with the flexible HCT-CI, there were significant differences in 2y-OS and 2y–NRM (p=0.005, p=0.005). Multivariate analysis identified age >50, performance status (PS) <90, donor type (HLA-mismatched/unrelated donor), and the flexible HCT-CI ≥4 as significant predictors for worse OS at 2 years. However, the flexible HCT-CI did not remain a significant predictor for NRM at 2 years in multivariate analysis, whereas age, PS and donor type did. The HCT-CI did not consistently predict both NRM and OS, but it still can be a useful tool in combination with other factors such as PS and age. Furthermore, the HCT-CI, although potentially useful for capturing pre-transplant comorbidity and risk-assessment, may need further validation prior to its adoption for routine clinical use.
    Biology of Blood and Marrow Transplantation 10/2014; · 3.35 Impact Factor
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    ABSTRACT: Background Cytomegalovirus (CMV) reactivation still remains a major problem following allogeneic hematopoietic stem cell transplantation (HSCT).Patients and methodsIn this study, we analyzed an immunoglobulin allotype, IgG1m(f), in CMV-seropositive HSCT recipients and their donors to distinguish donor-derived antibody from recipient-derived antibody. Eight donor-recipient pairs were informative regarding the appearance of donor-derived immunoglobulin-G (IgG), as the recipients were homozygous null for the IgG1m(f) allotype and the donors were IgG1m(f) positive. In these patients, total IgG, IgM, and allotype-specific IgG against CMV were measured by enzyme-linked immunosorbent assay. All subjects were monitored for at least 9 months after HSCT with (n = 5) or without (n = 3) CMV reactivation.ResultsDonor-derived CMV IgG tended to be elevated earlier in patients with CMV-seropositive donors than in those with CMV-seronegative donors. In 1 patient with a CMV-negative donor, donor-derived CMV IgG was not detected until late CMV reactivation. In 3 patients without CMV reactivation, donor-derived CMV IgG was also elevated within 1–6 months after HSCT.Conclusion In conclusion, the CMV serostatus of the donor may be related to the timing of the appearance of donor-derived CMV IgG and the reconstitution of humoral immunity against CMV, regardless of the CMV antigenemia level after HSCT.
    Transplant Infectious Disease 10/2014; · 1.98 Impact Factor
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    ABSTRACT: We report a case of severe oral infection with a high fever due to Lactobacillus rhamnosus during induction chemotherapy for acute myeloid leukemia. The patient did not improve on treatment with meropenem, clindamycin, or vancomycin until neutrophil recovery. Since L. rhamnosus GG is used in dairy products, and the patient ingested dairy products daily before starting chemotherapy, we suspected an association between the ingestion of dairy products and the development of infection. Pulsed-field gel electrophoresis using two different restriction enzymes showed that the strain isolated from the patient was identical to the L. rhamnosus GG strain isolated from dairy products and ATCC #53103. This was confirmed by a PCR assay with species-specific L. rhamnosus GG primers. Since Lactobacillus infection, particularly L. rhamnosus infection, can be fatal in immunocompromised hosts, we should consider Lactobacillus as a causative organism when Gram-positive rods are detected during treatment with broad-spectrum antibiotics and vancomycin. The causal association between the ingestion of dairy products containing Lactobacillus and Lactobacillus infection in immunocompromised hosts warrants further study.
    International Journal of Hematology 08/2014; · 1.68 Impact Factor
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    ABSTRACT: In unrelated hematopoietic SCT (HSCT), HLA allele mismatch has been shown to have a significant role. To clarify the importance of HLA allele mismatch in the GVH direction in related HSCT, we retrospectively evaluated 2377 patients who received stem cells from an HLA serologically matched related donor in the GVH direction using the database of the Japan Society for Hematopoietic Cell Transplantation. The cumulative incidences of grade II-IV and grade III-IV acute GVHD in patients with an HLA allele-mismatched donor (n=133, 5.6%) were significantly higher than those in patients with an HLA allele-matched donor. Multivariate analyses showed that the presence of HLA allele mismatch was associated with increased risks of grade II-IV and grade III-IV acute GVHD. In particular, HLA-B mismatch and multiple allele mismatches were associated with an increased risk of acute GVHD. The presence of HLA allele mismatch was associated with an inferior OS owing to an increased risk of non-relapse mortality (NRM). In conclusion, the presence of HLA allele mismatch in the GVH direction in related HSCT was associated with increased risks of GVHD and NRM, which led to an inferior OS. HLA allele typing is recommended in related HSCT.Bone Marrow Transplantation advance online publication, 7 July 2014; doi:10.1038/bmt.2014.141.
    Bone Marrow Transplantation 07/2014; · 3.47 Impact Factor
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    ABSTRACT: Background Previous studies have shown that most patients lose immunity to measles, mumps, and rubella (MMR) during long-term follow-up after allogeneic hematopoietic stem cell transplantation (HSCT), and immunizations against them have been investigated. However, these previous studies mainly targeted pediatric patients and information in adult patients is still insufficient. Methods We evaluated the immunity to MMR in 45 adult allogeneic HSCT patients. None of these patients received vaccination after HSCT. Results The seropositive rates at six years after allogeneic HSCT were estimated to be less than 44% for measles, less than 10% for mumps, and less than 36% for rubella. Thirteen of the 16 female patients who were 16-39 years old were negative or equivocal for rubella. Patients who developed grade II-IV acute graft-versus-host disease tended to become seronegative for measles and rubella at two years after HSCT, although the difference was not statistically significant. Conclusions This study showed that most adult patients lost immunity to MMR after allogeneic HSCT. Although we did not evaluate the safety and efficacy of vaccination in this study, most HSCT guidelines recommend vaccination for HSCT recipients without active chronic graft-versus-host disease or ongoing immunosuppressive therapy at 24 months after HSCT. Immunization against rubella is especially important for female patients of reproductive age. Further studies will be necessary to evaluate the effect of vaccination on the antibody response in adult allogeneic HSCT recipients.
    Hematology (Amsterdam, Netherlands) 07/2014; · 1.33 Impact Factor
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    ABSTRACT: Objectives We performed a meta-analysis to evaluate the impact of systemic antibiotic prophylaxis in hematopoietic stem cell transplantation (HSCT) recipients. Methods We collected reports from PubMed, the Cochrane Library, EMBASE, CINAHL, and Web of Science, along with references cited therein. We included prospective, randomized studies on systemic antibiotic prophylaxis in HSCT recipients. Results Seventeen trials with 1453 autologous and allogeneic HSCT recipients were included. Systemic antibiotic prophylaxis was compared with placebo or no prophylaxis in 10 trials and with non-absorbable antibiotics in two trials. Systemic antibiotics other than fluoroquinolones were evaluated in five of these 12 trials. Four trials evaluated the effect of the addition of antibiotics for gram-positive bacteria to fluoroquinolones. One trial compared two different systemic antibiotic regimens: fluoroquinolones versus trimethoprim-sulfamethoxazole. As a result, systemic antibiotic prophylaxis reduced the incidence of febrile episodes (OR 0.16; 95%CI 0.09-0.30), clinically or microbiologically documented infection (OR 0.38; 95%CI 0.22-0.63) and bacteremia (OR 0.31; 95% CI 0.16-0.59) without significantly affecting all-cause mortality or infection-related mortality. Conclusions Systemic antibiotic prophylaxis successfully reduced the incidence of infection. However, there was no significant impact on mortality. The clinical benefits of prophylaxis with fluoroquinolones were inconclusive because of the small number of clinical trials evaluated.
    The Journal of infection 07/2014; · 4.13 Impact Factor
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    ABSTRACT: Several high-risk HLA-allele mismatch combinations (HR-MMs) for severe acute GVHD have been identified by analyzing transplant outcomes in Japanese unrelated hematopoietic stem cell transplantation recipients. In this study, we reanalyzed the effects of HR-MMs in three transplantation time periods. We confirmed that the incidence of grade III-IV acute GVHD in the HR-MM group was significantly higher than that in the low-risk (LR) MM group (hazard ratio [HR] 2.74, p<0.0001) in the early time period (1993-2001). However, the difference in the incidence of grade III-IV acute GVHD between the HR-MM and LR-MM groups was not statistically significant (HR 1.06, p=0.85 and HR 0.40, p=0.21, respectively) in the mid (2002-2007) and late (2008-2011) time periods. Similarly, survival in the HR-MM group was significantly inferior to that in the LR-MM group (HR 1.46, p=0.019) in the early time period, whereas the difference in survival between the two groups was not statistically significant in the mid and late time periods (HR 1.06, p=0.75 and HR 0.82, p=0.58, respectively). In conclusion, the adverse impact of HR-MM has become less significant over time periods. Unrelated transplantation with a single HR-MM could be a viable option in the absence of a matched unrelated donor or an unrelated donor with a single LR-MM.
    Biology of blood and marrow transplantation: journal of the American Society for Blood and Marrow Transplantation 04/2014; · 3.15 Impact Factor
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    ABSTRACT: The relative desirabilities of an unrelated donor with a bidirectional 1-locus mismatch (1MM-Bi), a 1-locus mismatch only in the graft-versus-host direction (1MM-GVH), or a 1-locus mismatch only in the host-versus-graft direction (1MM-HVG) are not yet clear. We analyzed adult patients with leukemia or myelodysplastic syndrome who received a first allogeneic stem cell transplant from an HLA-A, -B, -C, and -DRB1 matched or 1-allele mismatched unrelated donor in Japan. The effects of 1MM-Bi (n=1020), 1MM-GVH (n=83), and 1MM-HVG (n=83) compared with a zero mismatch (0MM) (n=2570) were analyzed after adjusting for other significant variables. The risk of grade 3-4 acute graft-versus-host disease (GVHD) was higher with marginal significance in the 1MM-GVH group than in the 0MM group (hazard ratio, 1.85; P=0.014). However, there was no significant difference in overall or non-relapse mortality between the 1MM-GVH and 0MM groups. There was no significant difference in acute GVHD or overall or non-relapse mortality between the 1MM-HVG and 0MM groups. The risks of acute GVHD and overall mortality were significantly higher in the 1MM-Bi group than in the 0MM group. These findings indicate that unrelated donors with 1MM-GVH and 1MM-HVG are both good candidates for patients without an HLA-matched unrelated donor in a Japanese cohort.
    Biology of Blood and Marrow Transplantation 02/2014; 20(2). · 3.35 Impact Factor
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    ABSTRACT: Conditioning regimens consisting of reduced-dose cyclophosphamide (CY) and fludarabine (FDR) have been investigated for use in allogeneic hematopoietic stem cell transplantation (allo-HSCT) in patients with aplastic anemia to reduce the toxicities associated with CY. However, the ideal dose of CY has not been identified. In addition, little information is available regarding donor cell chimerism after allo-HSCT with these regimens. Therefore, we retrospectively analyzed 13 patients who underwent allo-HSCT with half-dose CY (100 mg/kg in total), FDR, and anti-thymocyte globulin at total doses of 2.5-10 mg/kg at our center. All the patients except one, who died due to encephalopathy on day 20, achieved neutrophil engraftment a median of 18.5 days after HSCT with complete donor-type chimerism. Two patients who received a graft from an HLA-matched donor subsequently developed mixed chimerism (MC) associated with transfusion-dependent cytopenia. One became transfusion-independent after donor lymphocyte infusion, but continues to exhibit MC. The other regained complete donor-type chimerism after the cessation of cyclosporine, but remains transfusion-dependent. These findings suggest that a conditioning regimen with half-dose CY and FDR is effective for achieving neutrophil engraftment and complete donor-type chimerism. However, subsequent MC may be observed, especially after HLA-matched HSCT.
    International journal of hematology 02/2014; · 1.17 Impact Factor
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    ABSTRACT: We previously reported that the baseline C-reactive protein level did not predict infectious events after hematopoietic cell transplantation (HCT). Procalcitonin (PCT) has recently emerged as a powerful biomarker for the early diagnosis of bacterial infection. We evaluated the ability of the baseline PCT level to predict early infectious events after HCT in 79 recipients who received HCT between 2008 and 2012. The high-PCT group (0.07 ng/mL, n=27) frequently experienced documented infection (DI) (21.2% vs 44.4% at day 30, P=0.038) and bloodstream infection (BSI) (15.4% vs 37.0% at day 30, P=0.035). In a multivariate analysis, however, the baseline PCT level was not significantly associated with DI (HR 2.01, P=0.089) or BSI (HR 2.28, P=0.084). Localized infection, such as anal canal problems, before the start of conditioning was seen in 26 patients. When we stratified the patients according to the presence of elevated PCT and localized infection, the group with elevated PCT and localized infection (n=17) was significantly associated with increased DI (HR 3.40, P=0.0074) and BSI (HR 3.59 P=0.0078) after HCT. A larger prospective observation is warranted to confirm the impact of the baseline PCT level and clinical features on the outcome of HCT.Bone Marrow Transplantation advance online publication, 13 January 2014; doi:10.1038/bmt.2013.217.
    Bone marrow transplantation 01/2014; · 3.00 Impact Factor

Publication Stats

4k Citations
1,180.91 Total Impact Points


  • 2014
    • Saitama Medical University
      • Department of Hematology and Oncology
      Saitama, Saitama, Japan
  • 2008–2014
    • Jichi Medical University
      • Division of Hematology
      Totigi, Tochigi, Japan
  • 2013
    • Tokyo Women's Medical University
      Edo, Tōkyō, Japan
  • 2012
    • Duke University Medical Center
      • Division of Cellular Therapy
      Durham, North Carolina, United States
  • 2004–2012
    • Keio University
      • School of Medicine
      Tokyo, Tokyo-to, Japan
  • 2011
    • Chiba Kaihin Municipal Hospital
      Tiba, Chiba, Japan
    • Chiba University
      • Department of Hematology
      Chiba-shi, Chiba-ken, Japan
    • Tokyo Metropolitan Ohtsuka Hospital
      Edo, Tōkyō, Japan
    • Cincinnati Children's Hospital Medical Center
      Cincinnati, Ohio, United States
  • 2001–2011
    • National Cancer Center, Japan
      • Endoscopy Division
      Edo, Tōkyō, Japan
  • 2000–2011
    • University Hospital Medical Information Network
      Edo, Tōkyō, Japan
    • National Institute for Basic Biology
      Okazaki, Aichi, Japan
  • 1995–2011
    • The University of Tokyo
      • • Department of Hematology and Oncology
      • • Department of Internal Medicine
      • • Department of Cell Therapy and Transplantation Medicine
      • • Division of Internal Medicine
      • • Faculty & Graduate School of Medicine
      Edo, Tōkyō, Japan
  • 2000–2009
    • Toranomon Hospital
      Edo, Tōkyō, Japan
  • 2000–2008
    • Tokyo Medical University
      • Division of Hematology
      Edo, Tōkyō, Japan
  • 2007
    • Yokohama City University
      • Department of Hematology
      Yokohama, Kanagawa, Japan
    • University of Michigan
      • Division of Hematology and Oncology
      Ann Arbor, MI, United States
  • 1999–2007
    • High Energy Accelerator Research Organization
      • Radiation Science Research Center
      Tsukuba, Ibaraki, Japan
  • 2005
    • Kyushu University
      • Division of Internal Medicine
      Fukuoka-shi, Fukuoka-ken, Japan
  • 2001–2003
    • National Hospital Organization Kyushu Cancer Center
      Hukuoka, Fukuoka, Japan
  • 1996–2002
    • Tokyo Metropolitan Komagome Hospital
      Edo, Tōkyō, Japan