Publications by authors named "Yuta Nakamura"

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  • Extracellular vesicles (EVs) from cancer cells can cause normal cells to grow uncontrollably, which might contribute to cancer spread.
  • Researchers created a device using nanowires that effectively removes these EVs without harming the cells.
  • By using this device, they were able to return normal growth to mammary gland cells that had been exposed to cancer cell-derived EVs.
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  • * In a study, ADSCs were administered after neurolysis, resulting in better muscle weight and nerve conduction velocity, indicating improved nerve regeneration, along with reduced tensile strength, which suggests less severe nerve adhesion compared to a control group.
  • * The presence of ADSCs led to increased anti-inflammatory markers, reduced inflammatory cytokines, a shift in macrophage types from harmful (M1) to helpful (M2), and less perineural scarring and more blood vessel growth, highlighting the potential of ADSCs
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We have previously suggested that in rice (Oryza sativa L.) leaves of different ages and N nutrition statuses, photosystems II and I (PSII and PSI, respectively) are regulated depending on N partitioning to Rubisco, which can determine the magnitude of unutilized light energy. The robustness of this mechanism was tested using Rubisco-antisense transgenic rice plants, in which reduced N partitioning to Rubisco markedly increases unutilized light energy.

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Introduction: A bidirectional relationship has been observed between type 2 diabetes mellitus and sarcopenia, especially among older adults. While previous studies have reported that imeglimin improves mitochondrial function, they have not assessed its effects on muscle strength in patients with type 2 diabetes. Therefore, we aimed to investigate the effects of imeglimin on muscle strength in patients with type 2 diabetes.

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Background:  Textual datasets (corpora) are crucial for the application of natural language processing (NLP) models. However, corpus creation in the medical field is challenging, primarily because of privacy issues with raw clinical data such as health records. Thus, the existing clinical corpora are generally small and scarce.

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  • The study aimed to evaluate whether mechanical left ventricular unloading could lower mortality rates in patients with cardiogenic shock who were receiving venoarterial extracorporeal membrane oxygenation (VA-ECMO).
  • A meta-analysis included data from two randomized controlled trials and eleven propensity score-matched studies, involving a total of 9,858 patients, and found that mechanical unloading significantly decreased mortality rates (RR, 0.89; P = 0.0001).
  • While mechanical unloading showed benefits in reducing mortality and improving outcomes, it also resulted in increased risks of major bleeding and hemolysis, indicating a need for careful consideration in clinical practice.
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Purpose: The diagnostic performance of large language artificial intelligence (AI) models when utilizing radiological images has yet to be investigated. We employed Claude 3 Opus (released on March 4, 2024) and Claude 3.5 Sonnet (released on June 21, 2024) to investigate their diagnostic performances in response to the Radiology's Diagnosis Please quiz questions.

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Purpose: Large language models (LLMs) are rapidly advancing and demonstrating high performance in understanding textual information, suggesting potential applications in interpreting patient histories and documented imaging findings. As LLMs continue to improve, their diagnostic abilities are expected to be enhanced further. However, there is a lack of comprehensive comparisons between LLMs from different manufacturers.

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  • The study evaluated the performance of OpenAI's GPT-4 Turbo with Vision (GPT-4TV), which can process both text and images, against the text-only version (GPT-4 T) by using questions from the Japan Diagnostic Radiology Board Examination (JDRBE).
  • A dataset of 139 questions was analyzed, with certified radiologists providing expert answers and scoring the AI's responses for credibility.
  • Results showed that GPT-4TV answered slightly more questions correctly (45%) than GPT-4 T (41%), but this difference wasn't statistically significant, and GPT-4TV received lower legitimacy scores for its responses.
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Background And Purpose: The rise of large language models such as generative pretrained transformers (GPTs) has sparked considerable interest in radiology, especially in interpreting radiologic reports and image findings. While existing research has focused on GPTs estimating diagnoses from radiologic descriptions, exploring alternative diagnostic information sources is also crucial. This study introduces the use of GPTs (GPT-3.

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After the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) epidemic emerged, the virus spread rapidly worldwide, and outbreaks continued to occur intermittently. Here, we present the case of a 5-year-old boy with acute disseminated encephalomyelitis (ADEM) and initial symptoms of dysphoria and pain in the right lower extremity. Around the time of this episode, the patient exhibited no fever or respiratory symptoms.

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New Ru-Pd heterobimetallic complexes were synthesized and structurally characterized utilizing 6,6″-bis(phosphino)-2,2':6',2″-terpyridine as a scaffold for the metal-metal bond. The dicationic Ru-Pd complex was found to exhibit high catalytic activity as a photocatalyst for photochemical reduction of CO to CO under visible light irradiation. This study established a new design of transition metal catalysts that tune photoredox catalysis with metalloligands.

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  • Previous research on large language models (LLMs) in medicine focused mainly on text, but new multimodal LLMs, like GPT-4V, can now also interpret images.
  • This study evaluated GPT-4V's performance on visual questions from the Japanese National Medical Licensing Examination by testing its accuracy with and without images in 108 questions.
  • Results showed no significant difference in accuracy between the two conditions, indicating that the inclusion of images did not notably enhance GPT-4V's ability to answer the medical questions.
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  • - The study examined the seasonal trends and demographics related to distal radius fractures in Japan using hospital data from April 2011 to March 2016.
  • - A total of 105,025 patients were analyzed, with a notable higher incidence of fractures in females (especially those aged 50+) during winter, particularly in eastern Japan.
  • - The findings suggest that distal radius fractures are more common in colder months, highlighting the need for awareness and preventive measures during winter, especially in snowy areas.
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Purpose: The purpose of this study was to investigate the longitudinal MRI characteristic of COVID-19-vaccination-related axillary lymphadenopathy by evaluating the size, T2-weighted signal intensity, and apparent diffusion coefficient (ADC) values.

Methods: COVID-19-vaccination-related axillary lymphadenopathy was observed in 90 of 433 health screening program participants on the chest region of whole-body axial MRIs in 2021, as reported in our previous study. Follow-up MRI was performed at an interval of approximately 1 year after the second vaccination dose from 2022 to 2023.

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Aim: Clinical trials showed the efficacy of sodium-glucose cotransporter 2 inhibitors for type 1 diabetes (T1D) by significant reductions in body weight and glycaemic variability, but elevated susceptibility to ketoacidosis via elevated glucagon secretion was a potential concern. The Suglat-AID evaluated glucagon responses and its associations with glycaemic control and ketogenesis before and after T1D treatment with the sodium-glucose cotransporter 2 inhibitor, ipragliflozin.

Methods: Adults with T1D (n = 25) took 50-mg open-labelled ipragliflozin daily as adjunctive to insulin.

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Background/aim: The recurrence rate following the excision of tenosynovial giant cell tumors (TSGCT) of the hand is very high. Intraoperative application of a surgical microscope has been reported. However, to date, there are no reports of medium-term outcomes related to this technique.

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Spinal epidural abscess (SEA) is an abscess that forms between the dura mater and vertebrae. SEA is characterized by back pain and neuropathy associated with fever, of which early diagnosis and treatment are necessary to avoid irreversible neurological sequelae. However, its diagnosis is often difficult because specific symptoms are rarely present in the early stages of the disease.

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Background Aims: Monocytes, derived from hematopoietic stem cells (HSCs), play a pivotal role in the immune response to cancer. Although they are an attractive source of cell therapy for cancer, a method for ex vivo expansion has not yet been established. Monocytes differentiated from pluripotent stem cells (PSCs), including induced pluripotent stem cells (iPSCs), can be an alternative source of HSC-derived monocytes because of their self-renewal and pluripotency.

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The prediction of gene structure within the genome sequence is the starting point of genome analysis, and its accuracy has a significant impact on the quality of subsequent analyses. Gene structure prediction is roughly divided into RNA-Seq-based methods, ab initio-based methods, homology-based methods, and the integration of individual prediction methods. Integrated methods are mainstream in recent genome projects because they improve prediction accuracy by combining or taking the best individual prediction findings; however, adequate prediction accuracy for eukaryotic species has not yet been achieved.

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The rate of cell proliferation is a crucial factor in cell production under good manufacturing practice (GMP) control. In this study, we identified a culture system for induced pluripotent cells (iPSCs) that supports cell proliferation and viability and maintains the cells in an undifferentiated state even at 8 days after seeding. This system involves the use of dot pattern culture plates that have been coated with a chemically defined scaffold which has high biocompatibility.

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Background And Objectives: Few studies exist on resistant starch in rice grains. The Okinawa Institute of Science and Technology Graduate University (OIST) has developed a new rice (OIST rice, OR) rich in resistant starch. This study aimed to clarify the effect of OR on postprandial glucose concentrations.

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In new drug development, cells or animals are treated with the selected candidate compound to confirm its efficacy and safety in nonclinical studies. Clinical laboratory tests are carried out using samples from experimental animals in these studies. The clinical laboratory test method validation in nonclinical fields should be conducted keeping in mind that the circumstances differ from those in clinical settings.

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Introduction: The amino acid 5-aminolevulinic acid (5-ALA) is the first heme biosynthetic precursor. The combination of 5-ALA with sodium ferrous citrate (SFC) enhances heme production, leading to increased adenosine triphosphate (ATP) production in mitochondria. We investigated whether administering 5-ALA/SFC improves glucose tolerance with an increase in insulin secretion in patients with maternally inherited diabetes and deafness (MIDD), which is characterized by an insulin secretory disorder due to impaired mitochondrial ATP production.

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