Publications by authors named "Ken-Ichi Yoshida"

Purpose: To elucidate the clinical characteristics of rare orbital pigmented perivascular epithelioid cell tumors (PEComa) with () rearrangement through a literature review.

Observations: A 49-year-old female was referred to our hospital with a mass measuring 16 × 14 mm in the extraconal space of the right orbit. Suspecting hemangioma or distended hematoma clinically, the tumor was completely excised through the right nasal conjunctiva.

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Many urinary free-glycan markers were identified in our previous studies. Here, the clinical utility of these markers was examined. Urine samples taken from 120 healthy subjects and 503 patients with various malignant tumors were analyzed.

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Purpose: To comprehensively summarize the magnetic resonance imaging (MRI) features of angiosarcomas presenting as Stewart-Treves syndrome (STS) through a retrospective case series and systematic review of previous publications.

Materials And Methods: We identified five patients with STS from our institutional database and 25 patients with STS from 15 publications through a systemic review. We reviewed the MR features of 30 patients with STS, including five males and 25 females with a mean age of 59.

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Introduction: The brain uses ketones, mainly 3-hydroxybutyrate (3-HB), as an alternative energy source. Therefore, oral intake of 3-HB may help maintain brain health. Previous studies indicated that achieving a maximum concentration (C) of 3-HB in plasma at 0.

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As the first step toward understanding how NADPH levels are regulated in Bacillus subtilis, we sought to obtain mutant strains with enhanced NADPH levels. Our previous study demonstrated that in a strain of B. subtilis expressing bacterial luciferase derived from Photorhabdus luminescens, artificially enhancing NADPH levels enhanced luciferase luminescence in the colonies.

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Bacillus velezensis S141 helps soybean establish specific symbiosis with strains of Bradyrhizobium diazoefficiens to form larger nodules and improve nitrogen fixation efficiency. In this study, we found that the dry weight of soybean roots increased significantly in the presence of S141 alone under drought conditions. Hence, S141 improved the root growth of soybean under limited water supply conditions.

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Here we present a "breathing" vessel consisting of expanded polytetrafluoroethylene, which allows gas exchange but no liquid permeation. The bacterial culture inside needs only agitation to promote air supply. Using this setup, a Bacillus subtilis cell factory for scyllo-inositol production grew to produce scyllo-inositol efficiently.

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Article Synopsis
  • * A case study focusing on a 51-year-old man with advanced UPS showed significant positive response to the drug pazopanib, which targets multiple cancer-related proteins.
  • * Genomic analysis identified coamplification of specific genes linked to patient response; after 3 years on pazopanib, the tumor shrank, indicating this genetic profile may predict better treatment outcomes.
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The Gram-positive bacterium is extensively used in the industry for the secretory production of proteins with commercial value. To further improve its performance, this microbe has been the subject of extensive genome engineering efforts, especially the removal of large genomic regions that are dispensable or even counterproductive. Here, we present the genome-reduced strain IIG-Bs-27-39, which was obtained through systematic deletion of mobile genetic elements, as well as genes for extracellular proteases, sporulation, flagella formation, and antibiotic production.

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Unlabelled: Mesophilic enzymes, which are active at moderate temperatures, may dominate enzymatic reactions even in the presence of thermophilic crude enzymes. This study was conducted to investigate this hypothesis with mesophilic inositol dehydrogenases (IolG and IolX) produced in HTA426. To ensure the efficient production of mesophilic enzymes, we first screened for promoters induced at moderate temperatures using transcriptome analysis and identified four genes highly expressed at 30°C in the thermophile.

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Biosurfactants have remarkable characteristics, such as environmental friendliness, high safety, and excellent biodegradability. Surfactin is one of the best-known biosurfactants produced by . Because the biosynthetic pathways of biosurfactants, such as surfactin, are complex, mutagenesis is a useful alternative to typical metabolic engineering approaches for developing high-yield strains.

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Dermatofibrosarcoma protuberans (DFSP) is a locally aggressive superficial mesenchymal neoplasm characterized by monomorphic spindle-cell proliferation with a storiform pattern. It can demonstrate pigmentation, myxoid changes, myoid differentiation, plaque-like growth, and fibrosarcomatous features; its varied presentation often complicates diagnosis. We report an extremely rare case of fibrosarcomatous DFSP with features reminiscent of a pleomorphic hyalinizing angiectatic tumor (PHAT) in a 73-year-old male.

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Primary sarcoma of the lung and mediastinum is rare. The diagnosis requires careful exclusion of sarcomatoid carcinoma, sarcomatoid mesothelioma, and metastases from extra-thoracic sites. This review summarizes the key morphologic, immunohistochemical, and molecular characteristics of sarcomas that are encountered in the lung and mediastinum.

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Article Synopsis
  • - Fusion sarcoma is a recently classified type of round-cell sarcoma identified in the 2020 WHO classification, and it's typically treated through surgical removal.
  • - Currently, there is no standard treatment for locally advanced or metastatic fusion sarcoma, making effective therapies critical.
  • - A case study of a middle-aged male with pelvic fusion sarcoma treated with carbon ion radiotherapy showed promising results, maintaining stable disease for 13 months, indicating potential effectiveness of this treatment for advanced cases.
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D-chiro-inositol and scyllo-inositol are known for their health-promoting properties and promising as ingredients for functional foods. Strains of Bacillus subtilis and Corynebacterium glutamicum were created by metabolic engineering capable of inexpensive production of these two rare inositols from myo-inositol, which is the most common inositol in nature. In addition, further modifications have enabled the synthesis of the two rare inositols from the much-cheaper carbon sources, glucose or sucrose.

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Aim: Aeribacillus pallidus PI8 is a Gram-positive thermophilic bacterium that produces thermostable antimicrobial substances against several bacterial species, including Geobacillus kaustophilus HTA426. In the present study, we sought to identify genes of PI8 with antibacterial activity.

Methods And Results: We isolated, cloned, and characterized a thermostable bacteriocin from A.

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In this study, we aimed to investigate the relationship between out-of-hospital natural death (OHND) and ambient temperature and examine the seriousness of the impact of the coronavirus disease-2019 (COVID-19) pandemic on this relationship. We used data from the Osaka Prefectural Office of Medical Examiners between 2018 and 2022 and performed a retrospective observational study. A Poisson regression model was applied to examine the relationship between OHND and temperature in Osaka City.

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Article Synopsis
  • * This strain can protect harmful pathogens in biofilms from biocides, making it a significant concern in healthcare settings.
  • * Research involving NDmed aims to enhance our understanding of biofilms and their genetic dynamics, leveraging modern molecular tools to explore complex bacterial behaviors.
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Malignant giant-cell tumors are extremely rare bone sarcomas that transform from conventional giant-cell tumors during long periods of treatment. Owing to their rarity, no further analysis of their molecular pathogenesis exists, and thus, no standard treatment has been established. Recently, organoid culture methods have been highlighted for recapturing the tumor microenvironment, and we have applied the culture methods and succeeded in establishing patient-derived organoids (PDO) of rare sarcomas.

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Genome-scale engineering enables rational removal of dispensable genes in chassis genomes. Deviating from this approach, we applied greedy accumulation of deletions of large dispensable regions in the Bacillus subtilis genome, yielding a library of 298 strains with genomes reduced up to 1.48 Mb in size.

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