Mitsuaki Hosoya

Fukushima Medical University, Hukusima, Fukushima, Japan

Are you Mitsuaki Hosoya?

Claim your profile

Publications (151)295.26 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: The primary manifestations of systemic lupus erythematosus (SLE) are various. One such manifestation is hemophagocytic syndrome (HPS). We here report a child with SLE presenting with HPS as a primary manifestation. In October 2010, an 11-year-old Japanese boy presented with pancytopenia, elevated liver enzymes, hyperferritinemia and hemophagocytosis due to macrophages in the bone marrow, and was diagnosed with HPS. A year later, he was found to have proteinuria and hematuria. Oral aphtha and Raynaud's phenomenon were observed, and the patient showed low serum complement levels and was positive for anti-nuclear antibodies (ANAs). He was subsequently diagnosed with SLE. Moreover, low serum complement levels and ANA positivity were detected in a serum sample preserved at the onset of HPS. The HPS was considered to be a primary manifestation of SLE on the basis of these findings. Based on this case, the presence of an underlying disease, such as SLE, should be investigated in cases of HPS.
    Fukushima journal of medical science 02/2015; 60(2):181-6. DOI:10.5387/fms.2013-24
  • [Show abstract] [Hide abstract]
    ABSTRACT: To assist in the long-term health management of residents and evaluate health impacts after the Tokyo Electric Power Company's Fukushima Daiichi Nuclear Power Plant accident in Fukushima Prefecture, the Fukushima prefectural government decided to conduct the Fukushima Health Management Survey. This report describes the results for residents aged 16 years or older who received the health check examinations and evaluates the data obtained from 2011 and 2012. The target group consisted of residents aged 16 years or older who had lived in the evacuation zone. The health check examinations were performed on receipt of an application for a health check examination from any of the residents. The examinations, including measurements of height, weight, abdominal circumference/body mass index (BMI), blood pressure, biochemical laboratory findings, and peripheral blood findings, were performed as required. 1) A total of 56,399 (30.9%) and 47,009 (25.4%) residents aged 16 years or older received health checks in 2011 and 2012, respectively. 2) In both years, a number of male and female residents in the 16-39 year age group were found to suffer obesity, hyperlipidemia, hyperuricemia, or liver dysfunction, and the prevalence of obesity and hyperlipidemia among residents increased with age. Furthermore, the proportion of residents with hypertension, glucose metabolic abnormalities or renal dysfunction was higher in those aged 40 years or older. 3) The frequencies of obesity, hypertension and hyperlipidemia among residents in 2012 were lower than those in 2011. However, the prevalence of liver dysfunction, hyperuricemia, glucose metabolic abnormalities and renal dysfunction among residents was higher in 2012 than in 2011. These results suggested the number of residents who had lived in the evacuation zone with obesity, hyperlipidemia, hyperuricemia, liver dysfunction, hypertension, glucose metabolic abnormalities, or renal dysfunction increased with age in all age groups. Therefore, we think that it is necessary to continue with health check examinations for these residents in order to ameliorate lifestyle-related disease.
    Fukushima journal of medical science 02/2015; 60(2):159-69. DOI:10.5387/fms.2014-31
  • Fukushima journal of medical science 02/2015; 60(2):211-2. DOI:10.5387/fms.2014-25
  • [Show abstract] [Hide abstract]
    ABSTRACT: Recombinant human soluble thrombomodulin (rhTM) is a promising therapeutic natural anticoagulant that is comparable to antithrombin, tissue factor pathway inhibitor and activated protein C. In order to clarify the efficacy of rhTM for the treatment of typical hemolytic uremic syndrome (t-HUS), we examined changes in renal damage in t-HUS mice treated with rhTM or vehicle alone. We used severe and moderate t-HUS mice injected with shiga toxin (Stx) and lipopolysaccharide (LPS). The severe t-HUS mice were divided into two subgroups [an rhTM subgroup (Group A) and a saline subgroup (Group B)] along with the moderate t-HUS mice [an rhTM subgroup (Group C) and a saline subgroup (Group D)]. Groups E and F were healthy mice treated with rhTM or saline, respectively. All mice in Group B died at 80-90 h post-administration of Stx2 and LPS whereas all mice in Group A remained alive. Loss of body weight, serum creatinine level, endothelial injury and mesangiolysis scores at 24 h after administration in the t-HUS mice treated with rhTM were lower than those in t-HUS mice treated with saline. The levels of hemoglobin at 6 h and platelet counts at 24 h after administration in Group A were higher than those in Group B. Serum interleukin (IL)-6, IL-1β and tumor necrotic factor (TNF)-α levels at 24 h after administration in Group A were lower than those in Group B. Serum C5b-9 levels at 24 h after the administration and serum fibrinogen degradation product (FDP) at 72 h after the administration of Stx2 and LPS were lower in Group A than in Group B. These results indicate that rhTM might afford an efficacious treatment for t-HUS model mice via the inhibition of further thrombin formation and amelioration of hypercoagulant status. © The Author 2015. Published by Oxford University Press on behalf of ERA-EDTA. All rights reserved.
    Nephrology Dialysis Transplantation 02/2015; DOI:10.1093/ndt/gfv004 · 3.49 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Background We examined the epidemiology, clinical manifestations, and prognosis of pediatric systemic lupus erythematosus (SLE) in Fukushima Prefecture, Japan over a 35-year period.Method We collected the medical records of 37 patients diagnosed with SLE between 1977 and 2013. These children were divided into two groups. Group 1 consisted of 19 patients who were diagnosed between 1977 and 1995, and Group 2 consisted of 18 patients diagnosed between 1996 and 2013. The epidemiology, clinical features, and prognosis were retrospectively compared between the two groups.ResultsThe mean numbers of patients per 100,000 children per year for Group 1 and Group 2 were 0.33 ± 0.25 and 0.35 ± 0.30, respectively. The duration from the onset of symptoms to treatment in Group 2 was shorter than that in Group 1; however, the clinical and laboratory findings at onset did not differ between the two groups. All patients were treated with PSL, and 17 patients in Group 1 and 18 in Group 2 were treated with methylprednisolone pulse therapy. The frequency of administration of cyclophophamide decreased whereas the frequency of administration of cyclosporine, tacrolimus and mizoribine pulse therapy increased in Group 2. The SLEDAI scores at the latest follow-up in Group 2 were lower those in Group1. The survivor rate was 84% in Group 1 and 100% in Group 2.Conclusions Our findings suggest that the frequency and severity of SLE in Group 1 were similar to those in Group 2, and that the prognosis of SLE in Group 2 is better than that in Group 1.
    Pediatrics International 01/2015; DOI:10.1111/ped.12588 · 0.73 Impact Factor
  • Source
  • [Show abstract] [Hide abstract]
    ABSTRACT: We estimated the efficacy of the current single administration of peramivir on the basis of peramivir pharmacokinetics in the upper respiratory tract (URT) and determined the predictive peramivir concentration-time curve to assess its efficacy against viruses with decreased susceptibility to neuraminidase inhibitors. Serum, nasal swab, or aspiration samples were collected from 28 patients treated with 10 mg/kg peramivir. Sequential influenza viral RNA load and susceptibility after peramivir administration were measured using a quantitative real-time reverse transcription-polymerase chain reaction and neuraminidase inhibition assay. The peramivir concentration in serum and URT after a single administration at 10 mg/kg was measured and the predictive blood and URT peramivir concentration-time curve was determined to assess various administration regimens against resistant variants. The serum peramivir concentration decreased to <0.1% of Cmax at 24 h after administration. Rapid elimination of peramivir from URT by 48 h after administration may contribute to an increase in the influenza A viral load after day 3 but not to a decrease in the influenza B viral load, despite the absence of decrease in susceptibility to peramivir. A longer maintenance of high level of peramivir in URT is expected by divided administration rather than once daily administration. When no clinical improvement is observed in patients with normal-susceptibility influenza A and B, peramivir readministration should be considered. In severe cases caused by resistant variants, better inhibitory effectiveness and less frequent adverse events is expected by divided administration rather than the once daily administration with an increased dosage. Copyright © 2014, American Society for Microbiology. All Rights Reserved.
    Antimicrobial Agents and Chemotherapy 12/2014; 59(3). DOI:10.1128/AAC.04263-14 · 4.45 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Background The Great East Japan Earthquake and the Fukushima Daiichi nuclear disaster forced people to evacuate their hometowns. Many evacuees from the government-designated evacuation zone were forced to change their lifestyle, diet, exercise, and other personal habits. The Comprehensive Health Check (CHC), 1 of 4 detailed surveys of The Fukushima Health Management Survey (FHMS), was implemented to support the prevention of lifestyle-related disease. The aim of this study was to analyze changes in red blood cell count (RBC), hemoglobin (Hb) levels, and hematocrit (Ht) levels by comparing data from the medical health checkup before and after the disaster in individuals who were 40 years old or older. Methods Subjects in this study were Japanese men and women living in the vicinity of the Fukushima Daiichi Nuclear Power Plant in Fukushima prefecture. Annual health checkups with a focus on metabolic syndrome for insured persons/dependents aged 40 or older by Health Care Insurers have been conducted since 2008. All analyses in this study were limited to men and women aged 40-90 years. Changes in RBC, Hb levels, Ht levels, and prevalence of polycythemia before and after the disaster were compared. Results First, RBC, Hb, and Ht significantly increased in both men and women evacuees. The evacuation was significantly associated with increased Hb levels after adjustment for age, gender, smoking status, excess ethanol intake, BMI, and baseline Hb level (beta = 0.16, p < 0.001). Furthermore, the prevalence of polycythemia stratified by smoking status or obesity also increased in the evacuee group. Conclusions To our knowledge, this is the first report revealing that the evacuation was associated with the risk of polycythemia. This information could be very important for periodic health checkup and lifestyle recommendations for evacuees in the future.
    BMC Public Health 12/2014; 14:1318. DOI:10.1186/1471-2458-14-1318 · 2.32 Impact Factor
  • 11/2014; 3(2):232-236. DOI:10.1007/s13730-014-0126-1
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Background: Lymphocytes are susceptible to damage from radiation, and the white blood cell (WBC) count, including counts of neutrophils and lymphocytes, is a useful method of dosimetry. According to the basic survey of the Fukushima Health Management Survey (FHMS), among 13 localities where evacuation was recommended, Iitate and Namie had more individuals with external radiation exposure of more than 5 mSv than the other evacuation areas. We analyzed whether or not WBC, neutrophil, and lymphocyte counts decreased after the disaster.Methods: The subjects of this study were 45 278 men and women aged 20 to 99 years (18 953 men and 26 325 women; mean age 56 years) in the evacuation zone who participated in the Comprehensive Health Check (CHC) from June 2011 to the end of March 2012.Results: Significant differences were detected in the mean values of WBC, neutrophil, and lymphocyte counts, and for the proportion of individuals under the minimum standard for WBC and neutrophil counts, among the 13 localities. However, the distribution of individuals at each 200-cell/µL increment in lymphocyte count were similar in these areas, and the WBC, neutrophil, and lymphocyte counts did not decrease in Iitate or Namie specifically.Conclusions: No marked effects of radiation exposure on the distribution of WBC counts, including neutrophil and lymphocyte counts were detected within one year after the disaster in the evacuation zone.
    Journal of Epidemiology 10/2014; 25(1). DOI:10.2188/jea.JE20140092 · 2.86 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Idiopathic hyperammonemia (IHA) has been described as a complication of intensive chemotherapy for the treatment of hematologic malignancy but has subsequently been found in patients undergoing bone marrow transplantation and in those with solid tumors treated with 5-fluorouracil. Although IHA is a rare complication, it is sometimes associated with high mortality in hematologic malignancies. Here we report the case of a 15-year-old boy in whom hyperammonemia developed during the initial treatment with prednisolone for newly diagnosed acute lymphoblastic leukemia and who survived after early detection and oral lactulose therapy. To the best of our knowledge, this is the first report of IHA that was not induced by intensive chemotherapy, stem cell transplantation, or asparaginase therapy in a patient with newly diagnosed leukemia, but developed during an initial treatment with a steroid. Early detection of IHA by measuring the plasma ammonia level in patients with neurological symptoms may improve the outcome.
    Journal of Pediatric Hematology/Oncology 09/2014; DOI:10.1097/MPH.0000000000000255 · 0.96 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Background Despite improvements in first-line therapies, the outcomes of relapsed or refractory childhood acute leukaemia that has not achieved complete remission after relapse, has relapsed after stem cell transplantation (SCT), has primary induction failure and has relapsed with a very unfavourable cytogenetic risk profile, are dismal.Objectives and Methods We evaluated the feasibility and efficacy of T-cell-replete haploidentical peripheral blood stem cell transplantation (haplo-SCT) with low-dose anti-human thymocyte immunoglobulin (ATG), tacrolimus, methotrexate and prednisolone (PSL) in 14 paediatric patients with high-risk childhood acute leukaemia.ResultsAll patients achieved complete engraftment. The median time to reaching an absolute neutrophil count of more than 0.5 × 109 L−1 was 14 days. Acute graft-vs-host disease (aGVHD) of grades II–IV and III–IV developed in 10 (71%) and 2 (14%) patients, respectively. Treatment-related mortality and relapse occurred in one (7%) patient and six (43%) patients, respectively. Eleven patients were alive and seven of them were disease-free with a median follow-up of 36 months (range: 30–159 months). The probability of event-free survival after 2 years was 50%.Conclusion These findings indicate that T-cell-replete haplo-SCT, with low-dose ATG and PSL, provides sustained remission with an acceptable risk of GVHD in paediatric patients with advanced haematologic malignancies.
    Transfusion Medicine 09/2014; 24(5). DOI:10.1111/tme.12150 · 1.26 Impact Factor
  • Kei Ogasawara, Yoshinobu Honda, Mitsuaki Hosoya
    [Show abstract] [Hide abstract]
    ABSTRACT: Cerebro-costo-mandibular syndrome (CCMS) is a rare disorder characterized by multiple rib abnormalities, micrognathia described as Pierre–Robin sequence, and cerebral involvement. Appropriate management of respiratory distress immediately after birth is crucial to rescue these patients. A boy, having a mother with Pierre–Robin sequence and a sister with CCMS, was diagnosed prenatally with CCMS and successfully treated with ex utero intrapartum treatment (EXIT) at 36 weeks 6 days of gestation. EXIT would be an effective option for rescuing patients with prenatally diagnosed CCMS and preventing neonatal hypoxia.
    Pediatrics International 08/2014; 56(4). DOI:10.1111/ped.12299 · 0.73 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Acute focal bacterial nephritis (AFBN) is a localized bacterial infection of the kidney presenting as an inflammatory mass without frank abscess formation. We report a case of acute focal bacterial nephritis without pyuria in a five-month-old boy presenting with high urinary β2-microglobulin (β2-MG) and N-Acetyl-β-(D)-Glucosaminidase (NAG) levels. The infant initially presented with high-grade fever, and plain computed tomography (CT) showed a nearly isodense mass, and contrast-enhanced abdominal CT showed a wedge-shaped hypodense lesion. Enterococcus was detected in the subsequent urine culture. A diagnosis of AFBN was made on the basis of his high inflammatory reaction, contrast-enhanced abdominal CT findings and high urinary β2-MG and NAG levels. He was treated with Ceftriaxone and subsequent improvement in inflammatory reaction and contrast-enhanced CT findings were observed. Voiding cystourethrogram (VCUG) showed a grade V right VUR. This case suggests that urinary β2-MG and NAG levels may be useful additional markers for the diagnosis of AFBN without pyuria.
    Fukushima journal of medical science 07/2014; DOI:10.5387/fms.2014-3
  • [Show abstract] [Hide abstract]
    ABSTRACT: Malignant peritoneal mesothelioma in children is a very rare disease and has a poor prognosis. Unlike malignant mesothelioma in adults, there is no clear causal association between this very rare malignancy in children and asbestos exposure. We report a case of peritoneal mesothelioma in an 11-year-old boy who presented with ascites. He was diagnosed with malignant mesothelioma on the basis of histopathological findings. His disease showed resistance to pemetrexed, but was treated successfully with platinum-based therapy with gemcitabine. He has achieved long-term survival in partial remission with stable disease.
    Anti-Cancer Drugs 07/2014; 25(9). DOI:10.1097/CAD.0000000000000143 · 1.89 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: AimSome patients with severe IgA nephropathy (IgAN) are resistant to multi-drug combination therapy; however, there have been few reports on the risk factors for non-responsiveness to treatment for severe IgAN. We, therefore, evaluated the risk factors for non-responsiveness to treatment in cases of severe IgAN.Methods We collected data on 44 children who had been diagnosed with IgAN with diffuse mesangial proliferation and treated with multi-drug combination therapy. The children were divided into two groups based on the prognosis at the latest follow-up. Group 1 consisted of 30 children with normal urine and 9 children with minor urinary abnormalities and Group 2 consisted of 4 children with persistent nephropathy and one child with renal insufficiency. The clinical, laboratory, and pathological findings for both groups were analyzed.ResultsThe age at the onset in Group 2 was higher than that in Group1. C3 deposits and high chronicity index values at the first renal biopsy were more frequently found in Group 2 than in Group 1 patients. IgA deposits, serum IgA and MRP 8/14 levels, and glomerular and interstitial MRP8+CD68+ scores at the second biopsy were all higher in Group 2 than in Group 1 patients.Conclusions Our results, although based on only a small number of patients in a retrospective study, suggest that age, presence of C3 deposits and interstitial changes at the onset, and persistent renal inflammatory activation may be risk factors for non-responsiveness to treatment for IgAN with diffuse mesangial proliferation.
    Nephrology 03/2014; DOI:10.1111/nep.12232 · 1.86 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Most wheezing episodes in infants are caused and exacerbated by virus-induced lower respiratory tract infections. However, there are few reports of epidemiologic and clinical virus-specific research with a focus on virus-induced wheezing. The purpose of the current study was to characterize the clinical presentation of virus-induced wheezing in pediatric patients <3 years of age who were hospitalized with lower respiratory tract infections. Of the 412 patients in the study, 216 were followed for 3 years. Nasopharyngeal aspirates collected from the patients at the time of admission were examined for the presence of respiratory syncytial virus (RSV), rhinovirus (RV), parainfluenza-3 virus (PIV-3), human metapneumovirus (hMPV), and influenza virus (Flu) using reverse-transcription polymerase chain reaction and rapid diagnostic tests. Clinical signs were assessed using a severity scoring system. In patients with wheezing at the time of admission, RSV, RV, RSV+RV, Flu, PIV-3, and hMPV were detected in 33, 14, 8, 8, 5, and 3 % of samples, respectively. There were no differences in age and severity scores between patients harboring more prevalent viruses (RSV and RV) and those with less common infections. Patients with wheezing and RV-positive aspirates at the time of admission were more likely to develop subsequent wheezing during the following 3 years. Conclusion: RSV and RV infections are factors in the development and exacerbation of wheezing after virus-induced lower respiratory tract infections. Moreover, RV-induced wheezing may be associated with subsequent recurrent wheezing and the development of asthma.
    European Journal of Pediatrics 02/2014; 173(7). DOI:10.1007/s00431-014-2277-7 · 1.98 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The incidence of obesity-related glomerulopathy (ORG) has increased over the last decade, but there have been few reports on ORG in Japanese children. Reported herein are two children with ORG identified on school urinary screening (SUS). Patient 1 was a 12-year-old boy in whom proteinuria was first detected on SUS. His body mass index (BMI) was 33.8 kg/m(2) and he had hypertension and hyperuricemia. Patient 2, a 10-year-old boy, also had proteinuria identified on SUS. His BMI was 34.8 kg/m(2) , and he had fatty liver, hyperuricemia, and hypercholesterolemia. Both were diagnosed with ORG based on obesity, proteinuria, and renal pathological findings. After treatment, including candesartan, food restriction and physical exercise, urinary protein excretion was decreased in both cases. We believe that such school urinary screening programs may be effective for the early identification and treatment of children with ORG.
    Pediatrics International 02/2014; 56(1):115-8. DOI:10.1111/ped.12213 · 0.73 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Background There have been a number of reports on large outbreaks of hemolytic uremic syndrome (HUS), but there have been no long-term studies of sporadic HUS in Japan. This study therefore investigated the epidemiology and prognosis of HUS in Fukushima Prefecture over a 26 year period. Methods The medical records of 26 patients with HUS between 1987 and 2012 were collected. These children were divided into two groups: those with HUS following an episode of gastroenteritis, often with bloody diarrhea (D + HUS; n = 24) and those with HUS not associated with prodromal diarrhea (D–HUS; n = 2). The D + HUS group was further subdivided into group A (11 patients requiring dialysis) and group B (13 patients not requiring dialysis). The epidemiological and clinical data, as well as prognosis, were retrospectively investigated for each group. ResultsApproximately 90% of HUS patients belonged to the D + HUS group. In this group, the mean number of patients per year from 1987 to 1999, and from 2000 to 2012 was 0.92 ± 0.95, and 1.08 ± 0.86, respectively. On admission, lactate dehydrogenase (LDH), alanine aminotransferase (ALT), blood urea nitrogen (BUN), serum creatinine and serum fibrinogen degradation product (FDP) levels in group A were all higher than in group B. Serum albumin level and estimated glomerular filtration rate (eGFR) in group A were lower than in group B. At 6 months after the onset of HUS in the D + HUS group, renal function was normal. Conclusions The frequency of HUS was constant from 1987 to 2012 in Fukushima. and serum LDH, ALT, BUN, creatinine, and FDP levels as well as eGFR might be risk factors for dialysis in D + HUS children.
    Pediatrics International 02/2014; 56(1). DOI:10.1111/ped.12193 · 0.73 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Myeloid/natural killer cell precursor acute leukemia (MNKL) is an aggressive disease with a high relapse rate even after allogeneic hematopoietic stem cell transplantation (SCT). We report a patient with MNKL who had a donor lymphocyte infusion (DLI) for relapse after T cell-replete human leukocyte antigen (HLA)-haploidentical SCT, but relapsed again 20 months later with loss of mismatched HLA. This case suggests that a strong graft-versus-leukemia effect of haploidentical SCT can be expected in MNKL patients. In the haploidentical setting, DLI should be considered for patients with relapsed leukemia whose leukemic cells have not lost HLA cell surface expression. Pediatr Blood Cancer © 2014 Wiley Periodicals, Inc.
    Pediatric Blood & Cancer 01/2014; 61(10). DOI:10.1002/pbc.24962 · 2.35 Impact Factor

Publication Stats

1k Citations
295.26 Total Impact Points

Institutions

  • 1998–2015
    • Fukushima Medical University
      • • Department of Pediatrics
      • • Division of Medicine
      • • Department of Microbiology
      Hukusima, Fukushima, Japan
  • 2003
    • Kumamoto University
      • Department of Child Development
      Kumamoto, Kumamoto Prefecture, Japan
  • 1993
    • Tokushima Bunri University
      • Faculty of Pharmaceutical Sciences
      Tokusima, Tokushima, Japan
  • 1992
    • KU Leuven
      • Department of Biomedical Kinesiology
      Leuven, VLG, Belgium
    • University of South Florida
      • Department of Chemistry
      Tampa, FL, United States