Publications by authors named "Nana Arai"

Background And Aims: Several studies have shown that the telomere length of engrafted donor cells affects the clinical outcomes in patients with hematologic diseases after allogeneic stem-cell transplantation (allo-SCT). However, the relationship between donor telomere length and clinical outcomes after umbilical-cord blood transplantation (UCBT) remains unknown. The study aim was to assess the relationship between donor telomere length and transplantation outcomes.

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  • * Imaging tests revealed multiple brain and lung nodules, and blood tests indicated symptoms consistent with hemophagocytic syndrome.
  • * A bone marrow examination confirmed the presence of Toxoplasma gondii, leading to treatment; however, the patient ultimately developed multiple organ failure and died shortly after admission.
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  • Most follicular lymphomas (FLs) are typically slow-progressing with good outcomes, but some patients face disease worsening within 24 months (POD24), leading to poorer results.
  • This study aimed to identify predictive risk factors for POD24 and analyze the microenvironment characteristics in FL patients experiencing POD24.
  • The research found that higher Ki-67 expression significantly correlates with POD24 events, and those patients also showed a decrease in certain immune cells, suggesting implications for targeted treatment approaches.
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  • This study compares two chemotherapy regimens used in patients undergoing umbilical cord blood transplantation: Flu/Mel/Bu2 (lower busulfan dose) and Flu/Mel/Bu4 (higher busulfan dose).
  • Researchers analyzed data from 87 adult patients to see if there were differences in nonrelapse mortality, relapse rates, progression-free survival, and overall survival between the two regimens.
  • The results showed no significant differences in outcomes, suggesting that the Flu/Mel/Bu2 regimen is a safe and effective option, particularly for older patients.
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  • Diffuse large B-cell lymphoma (DLBCL) shows varied clinical and genetic characteristics, but differences between primary extranodal and nodal DLBCL, especially involving double-expressor lymphoma (DEL), remain unclear.
  • The study analyzed 61 primary extranodal and 128 nodal DLBCL cases, finding that nodal DLBCL had higher BCL2 expression, while DEL was linked to poor outcomes in extranodal cases.
  • Results indicated that DEL significantly impacted progression-free and overall survival in primary extranodal DLBCL patients, establishing it as a crucial adverse prognostic factor.
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  • * Researchers examined 91 patients with blood cancers and found that those with certain FOXP3 genotypes (FOXP3-3279C/A or FOXP3-3279A/A) are at a significantly higher risk for severe chronic graft-versus-host disease (cGVHD).
  • * The findings suggest that this genetic marker could help predict which patients are more likely to experience severe cGVHD after transplantation, aiding in better patient management.
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Immune checkpoint inhibitor (ICI)-induced thrombocytopenias are rare immune-related adverse events (irAE), but ICI-related thrombotic thrombocytopenic purpura (TTP) is extremely rare. A 79-year-old woman with non-small cell lung cancer received maintenance therapy with the anti-human PD-L1 monoclonal antibody durvalumab. Four weeks after the last infusion, she developed overt TTP.

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Background: There are several psychosocial and ethical issues surrounding the decision to be a living kidney donor. The present study aimed to determine the perceptions of psychosocial and ethical issues that living kidney donors may have, and analyze their psychological characteristics.

Methods: Face-to-face semi-structured interviews were conducted with 15 donors.

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A 75-year-old man who had lymphadenopathy was admitted to our hospital. Histopathological examination of cervical lymph node biopsy specimens showed diffuse proliferation of lymphoma cells with large nuclei. In immunohistochemistry, the lymphoma cells were positive for CD5, CD10, CD20, BCL2, BCL6, and MYC.

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Objectives: Currently, active euthanasia is legalized in only 7 countries worldwide. These countries have encountered problems in its implementation. The study aims to summarize the practical clinical problems in the literature on active euthanasia.

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Background: There are several psychosocial and ethical issues surrounding the decision making of living kidney transplant donors. This study aimed to determine what health care professionals (HPs) consider in their clinical practice and their attitudes toward donors' decision-making processes.

Methods: Face-to-face semistructured interviews were conducted with 15 HPs.

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Isotopic H/D or Li substitution Raman spectroscopy was applied to new kinds of ionic liquids; N-methylimidazole (CIm) and acetic acid (CHCOOH) as the pseudo-protic ionic liquid (pPIL), and both of the neat and the 2,2,3,3-tetrafluoropropyl ether (HFE) diluted Li-glyme solvate ionic liquids (SIL) [Li(Gn)][TFSA] (Gn, glyme n = 3 or 4); TFSA, bis(trifluoromethanesulfonyl)amide) to clarify the proton transfer or the Li solvation/ion pair formation. The isotopic substitution Raman (ISR) spectra were obtained as the difference between the samples containing the same composition except the substituted isotope. The calculated and theoretical ISR spectra were also evaluated for comparison.

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Post-transplant lymphoproliferative disorder (PTLD) and other iatrogenic immunodeficiency-associated lymphoproliferative disorders (OIIA-LPD) are iatrogenic lymphoproliferative disorders (LPD) that develop in association with immunosuppressive treatment in the setting of organ transplantation and autoimmune disease, respectively. Each has a spectrum of pathologies ranging from lymphoid hyperplasia to lymphoma. To clarify the characteristics of the diffuse large B-cell lymphoma (DLBCL) subtype in a cohort of 25 patients with PTLD or OIIA-LPD from our institute, we selected 13 with a histological subtype of DLBCL, including 2 cases of PTLD and 11 of OIIA-LPD.

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Inflammatory cytokines play a role in hematopoiesis and development of myelodysplastic syndromes (MDS). Although increased serum levels of inflammatory cytokines are associated with poor survival in MDS patients, clinical management does not include assessment of inflammation. We investigated the significance of inflammation in MDS using serum C-reactive protein (CRP) levels, an indicator of the degree of systemic inflammation that can be used in routine practice.

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It has been reported that aqueous lithium ion batteries (ALIBs) can operate beyond the electrochemical window of water by using a superconcentrated electrolyte aqueous solution. The liquid structure, particularly the local structure of the Li, which is rather different from conventional dilute solution, plays a crucial role in realizing the ALIB. To reveal the local structure around Li, the superconcentrated LiTFSA (TFSA: bis(trifluoromethylsulfonil)amide) aqueous solutions were investigated by means of Raman spectroscopic experiments, high-energy X-ray total scattering measurements, and the neutron diffraction technique with different isotopic composition ratios of Li/Li and H/D.

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Hemophagocytic lymphohistiocytosis (HLH) is an uncontrolled hyperinflammatory disorder driven by an overactive immune system that results in high mortality. Post-transplant-associated hemophagocytic lymphohistiocytosis (PT-HLH) is a type of secondary HLH that occurs following allogeneic hematopoietic stem cell transplantation (allo-HSCT). The clinical features of PT-HLH remain unclear and diagnostic and prognostic tools have not yet been established.

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To clarify proton conduction mechanism in protic ionic liquids (PILs) and -PILs (PILs), equimolar mixtures of -methylimidazole (CIm) with fluorinated acetic acids were investigated by Raman spectroscopy, X-ray scattering, and dielectric relaxation spectroscopy (DRS). Only the ionic species exist in the equimolar mixture of CIm and HTFA (HTFA: trifluoroacetic acid). On the other hand, the equimolar mixture of CIm and HDFA (HDFA: difluoroacetic acid) consists of both ionic and electrically neutral species.

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Neutron diffraction measurements on Li/Li isotopically substituted 10 and 33 mol % *LiTFSA (lithium bis(trifluoromethylsulfonyl)amide)-AN- (acetonitrile-) and 10 and 33 mol % *LiTFSA-DMF-(-dimethylformamide-) solutions have been carried out in order to obtain structural insights on the first solvation shell of Li in highly concentrated organic solutions. Structural parameters concerning the local structure around Li have been determined from the least squares fitting analysis of the first-order difference function derived from the difference between carefully normalized scattering cross sections observed for Li-enriched and natural abundance solutions. In 10 mol % LiTFSA-AN- solution, 3.

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Although follicular lymphoma (FL) is a pathological entity characterized by relatively uniform histological and molecular findings, its clinical course is highly variable. Establishment of therapeutic strategies based on a simple and practical prognostic model is important. C-reactive protein (CRP) is an adverse prognostic marker for various tumors and aggressive lymphomas.

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Lithium-glyme solvated ionic liquids (Li-G SILs) and superconcentrated electrolyte solutions (SCESs) are expected to be promising electrolytes for next-generation lithium secondary batteries. The former consists of only the oligoether glyme solvated lithium ion and its counteranion, and the latter contains no full solvated Li ion by the solvents due to the extremely high Li salt concentration. Although both of them are similar to each other, it is still unclear that both should be room-temperature ionic liquids.

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Hemotropic mycoplasmas are common pathogens in animals, but it remains unclear what role these pathogens play in human infections. We report clinical and biologic characterization of Candidatus Mycoplasma haemohominis infection in a 42-year-old man in Japan. The patient had severe hemophagocytic syndrome 1 month after an accidental needlestick injury.

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Objective: The refined disease risk index (R-DRI) is a well-designed prognostic parameter that is based on only the disease type and status and is used for stratifying patients undergoing allogeneic hematopoietic stem cell transplantation (allo HSCT) into 4 risk groups. However, the application of the R-DRI for rare diseases has remained unclear.

Methods: We evaluated 135 patients who underwent allo HSCT for hematological malignancies including rare diseases, such as acute leukemia of ambiguous lineage, acute T-cell leukemia/lymphoma, extranodal natural killer T-cell lymphoma, and lymphoblastic lymphoma, at our institute.

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Methotrexate (MTX) in combination with a calcineurin inhibitor has been commonly used for prophylaxis of graft-versus-host disease (GVHD) following umbilical cord blood transplantation (UCBT) in Japan. However, the appropriate prophylactic MTX dosage in UCBT has not been established to date. To determine the preferential GVHD prophylaxis in UCBT, this study retrospectively investigated the administration of short-term MTX for 2 days versus 3 days.

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Cardiac involvement during lymphoma often causes complications, including arrhythmia. A 68-year-old male with cardiac tamponade was diagnosed with diffuse large B-cell lymphoma with cardiac involvement based on the presence of the tumor mass in the myocardium and lymphoma cells in the pericardial effusion. He developed atrial fibrillation, ventricular tachycardia, and atrial flutter after initiating chemotherapy.

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