Publications by authors named "Tomoko Matsumoto"

Activated partial thromboplastin time (APTT) prolongation occurs due to coagulation factor deficiencies/inhibitors, lupus anticoagulant (LA), and anticoagulant-taking, necessitating discrimination through further testing. Clot waveform analysis (CWA) can discriminate causes while measuring APTT, but conventional CWA exhibits moderate accuracy due to visual judgement and limited parameter use. We applied deep learning (DL) techniques to huge numerical data constituting clot waveforms and their first- and second-derivative curves (CWA curves) to leverage hidden features for developing an accurate classification model.

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Clot-fibrinolysis waveform analysis (CFWA) is an assay used to simultaneously evaluate coagulation and fibrinolysis reactions. Although the assay detected the reaction via transmittance changes, there was no evidence that the transmittance changes indicated reactions. This study aimed to demonstrate that transmittance changes indicate coagulation and fibrinolysis reactions by detecting relative markers.

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ACTIN DEPOLYMERIZING FACTORs (ADFs) regulate the organization and dynamics of actin microfilaments (AFs) by cleavage and depolymerization of AFs. The Arabidopsis thaliana genome encodes 11 ADF genes grouped into 4 subclasses. Subclass I ADFs, ADF1, -2, -3, and -4, are expressed in all vegetative tissues and are reportedly involved in the regulation of plant growth, and abiotic and biotic stress responses.

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Background: These days, various surgical techniques such as trans-anal, trans-perineal total mesorectal excision, and transvaginal natural orifice transluminal endoscopic surgery have been utilized with flexibility, which was not possible before the laparoscopic era.

Methods: From January 2014 to January 2023, 40 cases of c(yc)T4b rectal cancer underwent local curative surgery laparoscopically at Kansai Medical University Hospital. In 25 consecutive cases, we adopted multiple approaches (trans-anal total mesorectal excision, transvaginal natural orifice transluminal endoscopic surgery, trans-perineal total mesorectal excision, or prone position first abdominoperineal excision) to remove the deepest part of the tumor indicated by MRI last as the specimen-oriented surgery.

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Introduction: Deep vein thrombosis (DVT) is a common condition associated with significant morbidity and mortality. However, the detailed mechanisms of coagulation and fibrinolysis in DVT have not been adequately investigated. Recently, clot-fibrinolysis waveform analysis (CFWA) has been developed to assess coagulation and fibrinolysis reactions as one global assay.

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Gene editing in human induced pluripotent stem (iPS) cells with programmable nucleases facilitates reliable disease models, but methods using double-strand break repair often produce random on-target by-products. Prime editing (PE) combines Cas9 nickase with reverse transcriptase and PE guide RNA (pegRNA) encoding a repair template to reduce by-products. We implemented a GMP-compatible protocol for transfecting Cas9- or PE-2A-mCherry plasmids to track and fractionate human iPS cells based on PE expression level.

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Article Synopsis
  • * Results indicated that patients with ileostomy had significantly increased serum creatinine and decreased estimated glomerular filtration rates compared to those with colostomy, particularly among individuals already experiencing kidney issues preoperatively.
  • * The study found that ileostomy created a higher risk for developing new kidney disease post-surgery, identifying both ileostomy and hypertension as independent risk factors.
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Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), the causative agent of COVID-19, continues to spread around the world with serious cases and deaths. It has also been suggested that different genetic variants in the human genome affect both the susceptibility to infection and severity of disease in COVID-19 patients. Angiotensin-converting enzyme 2 (ACE2) has been identified as a cell surface receptor for SARS-CoV and SARS-CoV-2 entry into cells.

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By focusing on colexification, we detected central emotions sharing semantic commonalities with many other emotions in terms of a semantic relationship of both similarity and associativity. In analysis, we created colexification networks from multiple languages by assigning a concept to a vertex and colexification to an edge. We identify concepts of emotions with a large weight in the colexification network and specify central emotions by finding hub emotions.

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ACTIN DEPOLYMERIZING FACTOR (ADF) is a conserved protein that regulates the organization and dynamics of actin microfilaments. Eleven ADFs in the Arabidopsis thaliana genome are grouped into four subclasses, and subclass I ADFs, ADF1-4, are all expressed throughout the plant. Previously, we showed that subclass I ADFs function in the regulation of the response against powdery mildew fungus as well as in the regulation of cell size and endoreplication.

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Phytoextraction is a low-cost and eco-friendly method for removing pollutants, such as arsenic (As), from contaminated soil. One of the most studied As hyperaccumulators for soil remediation include Pteris vittata. Although phytoextraction using plant-assisted microbes has been considered a promising soil remediation method, microbial harnessing has not been achieved due to the complex and difficult to understand interactions between microbes and plants.

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Aging is known as one of the important risk factors for coronary artery disease (CAD). We explore whether an association of metabolic syndrome (Met-) increases subclinical atherosclerosis among elderly diabetic subjects estimating the plaque score () of the carotid artery. A total of 187 subjects were enrolled.

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Inflammatory activity and hypoxia in atherosclerotic plaques are associated with plaque instability and thrombotic complications. Recent studies show that vascular cell metabolism affects atherogenesis and thrombogenicity. This study aimed to identify the metabolites in macrophage-rich unstable plaques that modulate atherogenesis and serve as potential markers of plaque instability.

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How does a regime change influence elite mobility? By collecting data on elites after the Meiji Restoration in Japan in 1868, through which Japan transitioned from a feudal regime to a modern regime, we provide new evidence that the impact of the regime change on elite mobility varies across the stages of the regime change. We analyze the impact of the regime change from two aspects: (1) the composition of elites or elite membership and (2) the internal hierarchy within them. The regime change opened an opportunity for commoners to join the elite group.

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Objectives: The process for reimbursement of medical technologies in Japan is complex, and to date, it has not been well described overall. This article aims to provide an overview of the reimbursement system for medical technologies in Japan, including the reimbursement application process and the payment decision making.

Methods: Conduct review for relevant health policy and regulation and gather opinion from the key stakeholders.

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Aims: Reactive atrial-based anti-tachycardia pacing (rATP) in pacemakers (PMs) and cardiac resynchronization therapy defibrillators (CRT-Ds) has been reported to prevent progression of atrial fibrillation, and this reduced progression is expected to decrease the risk of complications such as stroke and heart failure (HF). This study aimed to assess the cost-effectiveness of rATP in PMs and CRT-Ds in the Japanese public health insurance system.

Methods And Results: We developed a Markov model comprising five states: bradycardia, post-stroke, mild HF, severe HF, and death.

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Article Synopsis
  • Scientists studied the effect of radiation on baby mice in their mom's belly and found that while the moms had more changes in their blood cells from radiation, the babies had fewer.
  • They used special techniques to look at the blood cells and discovered that some baby mice did have changes, but it was not as common as in their moms.
  • The researchers think that although baby mice make these changes, most of those cells go away before they grow up, making it look like the radiation didn't affect them as much.
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Somatic polyploidization often increases cell and organ size, thereby contributing to plant biomass production. However, as most woody plants do not undergo polyploidization, explaining the polyploidization effect on organ growth in trees remains difficult. Here we developed a new method to generate tetraploid lines in poplars through colchicine treatment of lateral buds.

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Disturbances in the balance between coagulation, anticoagulation and fibrinolysis may lead to thrombosis or haemorrhage. Simultaneous assessments of thrombin and plasmin facilitate overall understandings of pathological haemostasis, especially for thrombophilia. Here, we characterized coagulation-fibrinolysis potentials in plasmas with thrombophilia using anticoagulants-mediated thrombin-plasmin generation assay (T/P-GA).

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When patients with hemophilia A develop factor VIII (FVIII) inhibitors, FVIII replacement therapy becomes ineffective. Although immune-tolerance induction (ITI) therapy has been used to eradicate inhibitors, treatment is unsuccessful in approximately 30% of cases. However, the mechanism behind treatment failure remains unclarified.

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An 8-year-old Japanese boy with no underlying disease presented with severe intramuscular hematoma of the hip, and was admitted for a disseminated intravascular coagulation-like state with fibrinolytic dominance. Laboratory examinations revealed severe hyper-fibrinolysis with elevated markers, markedly shortened euglobulin clot lysis time, mildly decreased prothrombin, and severely decreased fibrinogen and factor XIII. Natural fibrin precipitates rapidly appeared in citrate-treated, ethylene-diamine-tetra-acetic-treated, and heparin-treated samples, but not in argatroban-treated samples, indicating that the mechanism of thrombin and fibrin formation was Ca-independent.

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The secondary cell wall (SCW) in the xylem is one of the largest sink organs of carbon in woody plants, and is considered a promising sustainable bioresource for biofuels and biomaterials. To enhance SCW formation in poplar ( sp.) xylem, we developed a self-reinforced system of SCW-related transcription factors from , involving VASCULAR-RELATED NAC-DOMAIN7 (VND7), SECONDARY WALL-ASSOCIATED NAC-DOMAIN PROTEIN 1/NAC SECONDARY WALL THICKENING-PROMOTING FACTOR3 (SND1/NST3), and MYB46.

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Introduction: Adult T-cell leukemia-lymphoma (ATL) is a mature T-cell lymphoproliferative neoplasm caused by human T-cell leukemia virus type-1 infection. There is no standard treatment for relapsed or refractory (r/r) ATL, and clinical outcomes are poor. This systematic review examined the survival outcomes for r/r ATL treated with various systemic therapies.

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Article Synopsis
  • Global coagulation potential in patients with acquired hemophilia A (PwAHA) was evaluated using clot waveform analysis (CWA) and thrombin/plasmin generation assays, revealing significant impairment correlated with factor VIII activity (FVIII:C) levels.
  • During the study, median FVIII:C levels were low upon admission (3.3 IU/dL) and improved over time, yet overall coagulation parameters remained severely impaired (T1) for about a month post-treatment.
  • The findings indicate that the global coagulation function in PwAHA is more compromised than FVIII:C levels suggest, highlighting the need for careful monitoring over the treatment period.
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Synopsis of recent research by authors named "Tomoko Matsumoto"

  • - Tomoko Matsumoto's recent research highlights advancements in gene editing techniques specifically in human induced pluripotent stem cells, demonstrating the efficacy of prime editing to minimize unwanted by-products while enabling precise genetic alterations.
  • - Her studies also explore the association between surgical methods, such as loop ileostomy versus colostomy, and their impact on renal function, addressing critical health implications for patients with pre-existing renal conditions.
  • - Additionally, Matsumoto investigates various biological phenomena, including the role of ACE2 in SARS-CoV-2 infection, metabolic syndrome on subclinical atherosclerosis in older adults, and the dynamics of actin depolymerizing factors in plants, contributing to a multifaceted understanding of health and disease.