Publications by authors named "Kazuya Tsuboi"

Article Synopsis
  • Lysosomal storage disorders and peroxisomal disorders are rare diseases caused by the buildup of substances in cells, and their prevalence in Japan was previously unknown.
  • A nationwide survey gathered data from 504 medical institutions, resulting in responses from 303, to estimate the total number of patients with these disorders in Japan.
  • Findings indicated that Fabry disease had the highest estimated patient count (1,658), while other disorders like Gaucher and Pompe had fewer patients, and birth prevalence rates were calculated for each disorder.
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Background: In Japan, newborn and high-risk screening for Fabry disease (FD), an inherited X-linked disorder caused by GLA mutations, using dried blood spots was initiated in 2006. In newborn screening, 599,711 newborns were screened by December 2018, and 57 newborns from 54 families with 26 FD-associated variants were detected. In high-risk screening, 18,235 individuals who had symptoms and/or a family history of FD were screened by March 2019, and 236 individuals from 143 families with 101 FD-associated variants were detected.

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Objectives: Information on the relationship between myocardial damage assessed by myocardial scintigraphy and prognosis in patients with Anderson-Fabry disease (AFD) is lacking. We therefore aimed to investigate the prognostic impacts of myocardial thallium-201 (Tl) and iodine-123 beta-methyl 15-para-iodophenyl 3(R, S)-methylpentadecanoic acid (I-BMIPP) dual scintigraphy in patients with AFD.

Methods: Eighteen consecutive patients with AFD underwent resting myocardial Tl/I-BMIPP dual scintigraphy.

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We investigated the otological aspects of Fabry disease (FD) in patients with normal hearing. Forty-one patients (21 men, 20 women) with bilaterally normal hearing were recruited, and their otological symptoms and hearing evaluations, which included pure tone audiometry (PTA) and distortion product otoacoustic emission (DPOAE), were investigated. Ten of the 21 male (47.

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Fabry disease is an inborn error metabolisms caused by deficiency of α-galactosidase A activity, and results in glycolipid accumulation of in multiple tissues or organs. Skin lesions occurred in Fabry disease are characterized by angiokeratoma, including acroparesthesia or hypohydrosis, among others. There are important characteristics for the diagnosis of Fabry disease.

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Background: Fabry disease is an X-linked lysosomal storage disorder and shows globotriosylceramide (Gb3) accumulation in multiple organs, resulting from a deficiency of α-galactosidase. In patients with Fabry disease, cardiovascular disease occurs at an early age. Previous studies have shown that serum levels of high-density lipoprotein-cholesterol (HDL-C) increase in this disease, yet its clinical significance for cardiovascular disease remains unclear.

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Background: Fabry disease (FD) is an X-linked lysosomal storage disorder resulting from the α-galactosidase A gene mutations. Enzyme-replacement-therapy (ERT) products for FD currently used include agalsidase alfa and agalsidase beta. There are many reports on efficacy and safety of ERT.

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The behaviors of laser-induced plasma and fuel spray were investigated by visualizing images with an ultra-high-speed camera. Time-series images of laser-induced plasma in a transient spray were visualized using a high-speed color camera. The effects of a shockwave generated from the laser-induced plasma on the evaporated spray behavior were investigated.

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Background: Enzyme replacement therapy (ERT) is the only approved therapy for Fabry disease. In June 2009, there was a worldwide shortage of agalsidase beta, necessitating dose reductions or switching to agalsidase alfa in some patients.

Case Presentation: We present two cases of Fabry disease (a parent and a child) who received agalsidase beta for 27 months at the licensed dose and 10 months at a reduced dose, followed by a switch to agalsidase alfa for 28 months.

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Background: Between 2009 and 2012, there was a worldwide shortage of agalsidase-β for the treatment of Fabry disease. Therefore, alternative treatments were needed, including switching to a different enzyme-replacement therapy.

Purpose: This is an ongoing observational study assessing the effects of switching from agalsidase-β (1.

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Purpose: Fabry disease is a rare, X-linked, inherited lysosomal storage disorder that can be treated with the enzymes agalsidasealfa (Replagal) and agalsidase beta (Fabrazyme). Currently, there is a global shortage of agalsidase beta, and this has increased global demand for agalsidase alfa. We assess the feasibility of switching patients on agalsidase beta treatment to agalsidase alfa instead.

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Background: Fabry disease (FD) is a rare X-linked lysosomal storage disorder and is included in the Specified Disease Treatment Research Program in Japan, which subsidizes medical care for beneficiaries with rare and other, designated diseases. However, no report on the epidemiologic features of Fabry disease has been published in Japan.

Methods: We used clinical research data reports submitted to the program between 2003 and 2008 to assess the epidemiologic features of 315 beneficiaries with FD.

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Purpose: Fabry disease is a rare, X-linked, inherited lysosomal storage disorder that can be treated with the enzymes agalsidase alfa (Replagal) and agalsidase beta (Fabrazyme). Currently, there is a global shortage of agalsidase beta, and this has increased global demand for agalsidase alfa. We assess the feasibility of switching patients on agalsidase beta treatment to agalsidase alfa instead.

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We report a case of lasting fever and cough with pulmonary infiltrates progressing 4 months after adjuvant radiotherapy following surgery for breast cancer. Chest radiography and computed tomography demonstrated alveolar opacities outside the irradiated pulmonary area. Laboratory data revealed neutrophilia and increased levels of C-reactive protein.

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One Japanese pedigree of familial essential thrombocythemia (FET) inherited in an autosomal-dominant manner is presented. A unique point mutation, serine 505 to asparagine 505 (Ser505Asn), was identified in the transmembrane domain of the c-MPL gene in all of the 8 members with thrombocythemia, but in none of the other 8 unaffected members in this FET family. The Ba/F3 cells expressing the mutant Asn505 acquired interleukin 3 (IL-3)-independent survival capacity, whereas those expressing wild-type Ser505 did not.

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Therapy-related myelodysplastic syndrome and therapy-related acute myelocytic leukemia (AML) are now recognized as hematologic malignancies that occur a few years after chemotherapy for primary malignancy with alkylating agents or topoisomerase II inhibitors. The secondary leukemia is usually AML and sometimes is preceded by a myelodysplastic syndrome. Acute lymphoblastic leukemia (ALL) as a secondary leukemia is quite rare, and secondary T-cell ALL after AML is even rarer.

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We report a case of chronic myelogeneous leukaemia (CML) in B-lineage lymphoid blastic crisis (BC) having chromosome abnormality, inv(16)(p13;q22) in addition to Philadelphia chromosome, in 20/20 marrow metaphase. Inv(16)(p13;q22) was not observed in cells of chronic phase or accelerate phase. Abnormalities of chromosome 16, including inv(16)(p13;q22), del(16)(q22) and t(16;16)(p13;q22), have been reported mostly in acute myelomonocytic leukaemia (AML), (FAB M4-Eo), and some in CML-BC and myelodysplastic syndrome (MDS) cases.

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A patient with Down syndrome (DS) at the time of diagnosis of acute lymphoblastic leukemia (ALL) had a relapse with acute myeloid leukemia (AML) after 4 years of complete remission. Although the diagnosis was AML, the leukemic blasts at relapse showed an immunoglobulin H rearrangement that turned out to be identical to that of the initial ALL blasts. It is thought that the leukemic precursor cells of this patient had the potential to differentiate into both lymphoid and myeloid lineages.

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B-Cell chronic lymphocytic leukemia (B-CLL) / small lymphocytic lymphoma (SLL) consists of heterogeneous diseases that are distinguished by morphological, immunophenotypic and molecular features. MUM1 (multiple myeloma oncogene 1) is a protooncogene that is deregulated as a result of (6;14)(p25;q32) chromosomal translocation in multiple myeloma, and is also expressed in a variety of malignant lymphoma entities. We examined the expression of MUM1 in B-CLL / SLL, and found that 2 of 4 B-CLL-derived cell lines and 14 of 29 patients' specimens expressed MUM1 by immunohistochemical analysis.

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Nasal natural killer (NK)/T-cell lymphoma is characterized by an aggressive clinical course and poor prognosis. The term "NK/T-cell" lymphoma includes both the NK-cell type and the T-cell type, which are classified by immunophenotyping and according to T-cell receptor (TCR) rearrangement. In addition, CD56+ T-cell lymphoma is defined as NK-like T-cell lymphoma.

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