Publications by authors named "Naoki Wada"

The increasing plastic production causes serious problems in the marine environment, and the main source of plastic waste comes from the fishing and aquaculture industries. Although there have been various efforts to develop aquaculture equipment with marine biodegradable plastics, an urgent need is to develop an assay to evaluate their biodegradation in aquaculture environments. This study focused on evaluating the biodegradation of biomass plastic in recirculating aquaculture systems (RAS) that mimic freshwater, brackish water, and saltwater aquacultures.

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COVID-19 is now considered endemic in many countries. On May 8, 2023, Japan reclassified COVID-19 from a pandemic to an endemic status, shifting surveillance from universal to sentinel reporting and transitioning the testing and treatment cost of COVID-19 from public funding to individual health insurance coverage. Restrictions on movement, events, and business hours were lifted, potentially increasing cases and complicating tracking.

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In baseball pitching, pivot leg is known to play an important role in linear acceleration down the mound. However, its contribution to the rotational movements of the proximal segments such as pelvis and upper body remains unknown. This study aimed to investigate the association between the pivot leg rotation, pelvis rotation, and trunk separation during the stride phase of baseball pitching in relation to ball speed.

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This study presents a novel synthetic method to synthesize fully bio-based cellulose esters from natural aldehydes in a multi-functional ionic liquid (as a solvent for cellulose and as an esterification and oxidation catalyst) in atmospheric oxygen. The aerobic oxidative esterification of cellulose with high atom economy proceeded under metal-free conditions without any additional catalysts or activators.

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Glucagon-like peptide-1 (GLP-1) is an incretin produced by enteroendocrine preproglucagon (PPG)-expressing cells in response to nutrient ingestion that potentiates insulin secretion. The voltage-gated Ca channel has been reported previously to be involved in glucose-stimulated GLP-1 secretion; in this study, we show that PPG-cells in upper and lower small intestine substantially express the voltage-gated Ca channel αδ-1 subunit (Caαδ-1). In vitro experiments using NCI-H716 cells demonstrate that inhibition of Caαδ-1 by gabapentin (GBP), an inhibitory ligand of the αδ subunit, attenuates glucose-stimulated intracellular calcium elevation and reduces GLP-1 secretion.

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Aims: Exercise stress echocardiography (ESE) is often used to identify heart failure with preserved ejection fraction (HFpEF) in patients presenting dyspnea. However, diagnostic criteria have not been standardized. Here, we sought to develop ESE-based criteria to diagnose HFpEF in dyspneic patients.

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Introduction: We investigated the subsequent trends in age and antithrombotic therapy in patients who underwent transurethral resection of bladder tumor (TURBT) and examined the rate of perioperative complications.

Methods: Medical records of patients who underwent TURBT were retrospectively analyzed. We arbitrarily divided the observation years into three periods (I: 2007-2013, II: 2014-2018, and III: 2019-2023) to compare the trends in age and frequency of perioperative complications after TURBT between patients taking and those not taking antithrombotic drugs.

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Background: Immune-mediated necrotizing myopathy (IMNM) is a type of autoimmune myositis. Anti-signal recognition particle (SRP) antibodies are highly specific to this disease.

Case: A 76-year-old woman presented with a 4-month history of acute progressive limb muscle weakness and dysphagia.

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Lignocellulosic biomass-based plastics provide a sustainable alternative to petroleum-based plastics by converting agricultural by-products into value-added materials, promoting a circular economy. This study investigates the development of thermoplastics from sugar beet pulp (SBP), a by-product rich in cellulose and pectin. A one-pot direct transesterification process was used to fully substitute hydroxy groups in SBP with acyl chains of varying lengths (C2-C10), achieving up to 96 % substitution.

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Aims: Left ventricular (LV) diastolic dysfunction and heart failure with preserved ejection fraction (HFpEF) are common cardiac complications of patients with systemic sclerosis (SSc). Exercise stress echocardiography is often used in symptomatic patients with SSc to detect abnormal increases in pulmonary pressures during exercise, but the pathophysiologic and prognostic significance of exercise stress echocardiography to assess the presence of HFpEF in these patients is unclear.

Methods And Results: Patients with SSc (n=140) underwent ergometry exercise stress echocardiography with simultaneous expired gas analysis.

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Article Synopsis
  • Adult T-cell leukemia/lymphoma (ATLL) is a type of cancer linked to HTLV-1 virus infection, with the WHO's new 5th Edition classification outlining essential and desirable diagnostic criteria for its identification.
  • A new diagnostic method combining HBZ-ISH and tax-PCR enhances detection of HTLV-1 in cases where only preserved tissue samples are available, alongside traditional Southern blot techniques.
  • The review addresses the morphological and phenotypic characteristics of ATLL, noting the prevalence of certain phenotypes, genetic abnormalities, and emphasizing the need for further research and classification in understanding the disease's complex nature.
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We report a case of retroperitoneal abscess mimicking a malignant retroperitoneal tumor. A 77-yearold woman was referred to our hospital because of retroperitoneal tumor without any symptoms. The tumor was located just behind the inferior vena cava, and the tumor size was about 38 mm.

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  • * Sixteen participants were treated with imeglimin over three months, but results showed no significant changes in their metabolic rates or body composition.
  • * However, levels of growth differentiation factor 15 (GDF15) increased, suggesting it may serve as a potential marker for imeglimin's effectiveness in treating type 2 diabetes.
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The main goals of acquired hemophilia A (AHA) therapy are to arrest bleeding using bypass agents and eradicate FVIII inhibitors using immunosuppressive therapy (IST). We treated a total of 25 patients with AHA in the past 10 years at Gunma University Hospital. Fifteen patients (60%) underwent rehabilitation during hospitalization.

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We investigated the influence of sarcopenia on treatment outcomes in elderly patients receiving medical therapy for lower urinary tract symptoms (LUTS). We included male patients with LUTS aged ≥ 75 years who had not changed their medication for 1 year. Current conditions were estimated using IPSS, overactive bladder symptoms score (OABSS), and screening tool for sarcopenia (SARC-F).

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Aims: The diagnosis of heart failure with preserved ejection fraction (HFpEF) remains challenging based on resting assessments. Exercise echocardiography is often used to unmask abnormalities that develop during exercise, but the diagnostic criteria have not been standardized. This study aimed to elucidate how cardiologists utilize exercise echocardiography to diagnose HFpEF in real-world practice.

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  • Identifying CD30 expression through immunohistochemistry is crucial for treating lymphomas with CD30-targeting antibody-drug conjugates, but no standardized staining protocol existed prior to this study.
  • The research compared three automated immunostaining platforms (Bond III, Dako Omnis, Ventana BenchMark ULTRA) using varying dilutions of a primary antibody to determine effective staining conditions.
  • The study found that adjusting antibody dilutions and cutoff values can achieve consistent CD30 staining across different platforms, with high concordance rates for diagnosing peripheral T-cell lymphomas.
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Metabolic dysfunction-associated steatohepatitis (MASH) is a progressive form of nonalcoholic fatty liver disease characterised by fat accumulation, inflammation, oxidative stress, fibrosis, and impaired liver regeneration. In this study, we found that heme oxygenase-1 (HO-1) is induced in both MASH patients and in a MASH mouse model. Further, hepatic carbon monoxide (CO) levels in MASH model mice were >2-fold higher than in healthy mice, suggesting that liver HO-1 is activated as MASH progresses.

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Background: Left atrial (LA) dysfunction is common in heart failure (HF) with preserved ejection fraction. However, data on the pathophysiologic impacts of impaired LA functional reserve remained limited. We sought to determine the association of abnormal LA dynamics during exercise with cardiovascular reserve, exercise capacity, and clinical outcomes.

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Objective: Detrusor underactivity (DU) is a common cause of lower urinary tract symptoms (LUTS). To date, no consensus has been reached on the urodynamic criteria for defining DU. We previously proposed the area under the curve of the Watts factor (WF-AUC) as a new parameter for diagnosing DU.

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We present three cases of bilateral metachronous testicular tumors. The patient in case 1 had a history of left orchiectomy for undescended testis at the age of 19. The pathological findings revealed germ cell neoplasia in situ.

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The prenatal diagnosis of fetal heart disease potentially influences parental decision-making regarding pregnancy termination. Existing literature indicates that the severity, whether in complexity or lethality, significantly influences parental decisions concerning abortion. However, questions remain as to how fetal heart disease severity impacts parental decisions, given recent advancements in postsurgical outcomes.

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Aims: Cardiopulmonary exercise testing (CPET) combined with exercise echocardiography (CPETecho) allows simultaneous assessments of cardiac, pulmonary, and ventilation in heart failure (HF) with preserved ejection fraction (HFpEF). This study sought to determine whether simultaneous assessment of CPET variables could provide additive predictive value over exercise stress echocardiography in patients with dyspnoea.

Methods And Results: CPETecho was performed in 443 patients with suspected HFpEF (240 HFpEF and 203 controls without HF).

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SMARCB1 is a gene known to cause carcinogenesis in many soft tissue tumors, including malignant rhabdoid tumors and epithelioid sarcoma. Since the first report of a subtype of sinonasal carcinoma characterized by a deficiency of the SMARCB1 gene in 2014 to date, fewer than 200 cases have been reported. We report a case of SMARCB1-deficient sinonasal carcinoma with clear cell morphology.

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Article Synopsis
  • The study focuses on heart failure with preserved ejection fraction (HFpEF), aiming to improve classification by incorporating exercise assessments alongside clinical characteristics.
  • A total of 265 HFpEF patients were tested through exercise stress echocardiography, leading to the identification of three distinct phenogroups based on various clinical and exercise-related parameters.
  • The phenogroups revealed differences in cardiac function, exercise capacity, and prognosis, with two groups showing higher rates of mortality and heart failure events compared to the third group.
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