Publications by authors named "Yusuke Iwasaki"

Hypochlorous acid (HClO), one of the major reactive oxygen species, is obtained by electrolyzing a sodium chloride solution. HClO is a safe and effective disinfectant and decomposing agent widely used as an alternative to sodium hypochlorite (NaClO). In this study, the authors aimed to evaluate the safety and efficiency of HClO generated by electrolyzing sodium chloride as a decontaminant.

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A germline alteration in the PTEN gene causes a spectrum of disorders conceptualized as PTEN hamartoma tumor syndrome (PHTS), which show high risk of tumor development and a highly variable and complex phenotype. The diagnosis of PHTS is established in a proband by identification of a heterozygous germline PTEN pathogenic variant on molecular genetic testing. In this study, to understand more PTEN-associated clinical phenotype and PHTS in a Japanese population, we extracted 128 germline PTEN rare variants from 113,535 adult Japanese registered in Biobank Japan (BBJ), and categorized 29 pathogenic/likely pathogenic variants in 30 individuals (0.

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Article Synopsis
  • Food business operators need to control hazardous factors in their manufacturing processes to ensure food safety, particularly with beans that may contain cyanogenic compounds.
  • This study aims to establish Critical Control Points (CCPs) for monitoring these compounds and utilizes a method called post-column HPLC with fluorescence detection to analyze them in intermediate products.
  • Results show that cyanoglycoside levels drop significantly throughout the manufacturing process, especially during the shibukiri (soaking and boiling) stage, with final product levels well below safety regulations.
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Objective: Quantifying and managing the matches and training loads of players is important for injury prevention. As rugby union is a full-contact sport and frequent contact injuries occur, it might also be important to quantify and manage players' contact loads. This study aimed to clarify the relationship between contact load and injury incidence in elite rugby union players.

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Glyphosate and glufosinate are the most widely used herbicides worldwide. We developed a simple and rapid analytical method for detecting glyphosate, glufosinate, and their metabolites (-acetyl glyphosate: Gly-A, -acetyl glufosinate: Glu-A, and 3-(hydroxymethylphosphinyl)propanoic acid: MPPA) in soybeans. The method involved extraction with water, trapping in a mini-column containing polymer-based resin with strong anion exchange groups, dehydration with acetonitrile, and solid-phase analytical derivatization at ambient temperature for 1 min using -(-butyldimethylsilyl)--methyl trifluoroacetamide (MTBSTFA), followed by Liquid chromatography-tandem mass spectrometry (LC-MS/MS) determination.

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Glycosaminoglycans (GAGs), including hyaluronic acid (HA), chondroitin sulfate (CS)/dermatan sulfate (DS), heparan sulfate (HS)/heparin (HP), and keratan sulfate (KS), play pivotal roles in living organisms. Generally, GAGs are analyzed after enzymatic digestion into unsaturated or saturated disaccharides. Due to high structural similarity between disaccharides, however, separation during analysis is challenging.

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Purpose: Genetic susceptibility to nonsyndromic renal cell carcinoma (RCC) remains poorly understood, especially for different histological subtypes, as does variations in genetic predisposition in different populations. The objectives of this study were to identify risk genes for RCC in the Canadian population, investigate their clinical significance, and evaluate variations in germline pathogenic variants (PVs) among patients with RCC across the globe.

Materials And Methods: We conducted targeted sequencing of 19 RCC-related and 27 cancer predisposition genes for 960 patients with RCC from Canada and identified genes enriched in rare germline PVs in RCC compared with cancer-free controls.

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The Committee on Pesticides and Veterinary Drugs of the Food Sanitation Council under the Pharmaceutical Affairs and Food Sanitation Council set the maximum residue limits (MRLs) for residual pesticides, veterinary drugs, and feed additives in food commodities according to the basic principles for establishing MRLs for pesticides in food commodities in Japan. The basic principles consist of the following seven concepts: 1. Outline of setting Japanese MRLs for pesticide residue in food commodities; 2.

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To assess the risk of food allergies in foods processed under the Japanese food labeling system, estimating exposure to hidden allergens is necessary. We assessed exposure to egg protein in foods processed according to the Japanese food labeling system. First, we estimated the concentration distribution of egg protein by Bayesian methods using data from the literature and the measurement of food products with precautional declarations in the labeling margin.

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Large-scale multicenter studies demonstrating the safety and effectiveness of transradial iliac artery stenting are lacking. We evaluated the data from a multicenter database in Japan. Transradial iliac artery stenting was performed on 115 lesions in 105 patients.

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Rapid analysis of multiple food allergens is required to confirm the appropriateness of food allergen labelling in processed foods. This study aimed to develop a rapid and reliable method to simultaneously detect trace amounts of seven food allergenic proteins (wheat, buckwheat, milk, egg, crustacean, peanut, and walnut) in processed foods using LC-MS/MS. Suspension-trapping (S-Trap) columns and on-line automated solid-phase extraction were used to improve the complex and time-consuming pretreatment process previously required for allergen analysis using LC-MS/MS.

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Glycosaminoglycans (GAGs), such as heparan sulfate (HS), play essential roles in living organisms. Understanding the functionality of HS and its involvement in disease progression necessitates the sensitive and quantitative detection of HS-derived unsaturated disaccharides. Conventionally, fluorescence derivatization precedes the HPLC analysis of these disaccharides.

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In this study, a public seminar on risk communication methods was conducted to raise awareness and disseminate accurate knowledge about residual pesticides to consumers. Additionally, surveys on consumer awareness were conducted on the attendees before and after the seminar to evaluate its effectiveness. Responses were obtained from 84 participants.

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Article Synopsis
  • Sesame is a common allergen that can trigger adverse reactions in allergic individuals, prompting the need for reliable detection methods in food products.
  • A new sandwich ELISA method was developed, utilizing two monoclonal antibodies and a unique extraction buffer, which is highly specific for detecting sesame proteins in both processed and raw foods.
  • The method has a very low limit of detection (0.013 µg/g) and shows good recovery rates (67% to 81%) across various food samples, making it a dependable tool for ensuring accurate sesame labeling and safety for allergic consumers.
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Numerous variants of unknown significance (VUSs) exist in hereditary breast and ovarian cancers. Although multiple methods have been developed to assess the significance of BRCA1/2 variants, functional discrepancies among these approaches remain. Therefore, a comprehensive functional evaluation system for these variants should be established.

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Several compounds with different physical properties are present in foods, biological components, and environmental samples, and there are cases in which these must be analyzed simultaneously. However, it is difficult to extract compounds with different physical properties from the same sample using a single method. In the present study, we examined the optimal conditions for the QuEChERS extraction of several kinds of compounds from orange juice using design of experiments (DoE) and response surface methodology (RSM) to determine the optimal ratio of organic solvent to sodium chloride.

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  • Ossification of the posterior longitudinal ligament of the spine (OPLL) is a disease that can cause serious neurological issues, and its causes are not fully understood, particularly in relation to type 2 diabetes and high body mass index (BMI).
  • A comprehensive meta-analysis involving 22,016 Japanese individuals identified 14 significant genetic markers linked to OPLL, with 8 being newly discovered, and further analyses pointed to specific genes associated with the disease.
  • The research revealed that increased BMI and high bone mineral density could have a causal relationship with OPLL, and different subtypes of the disease were identified, particularly highlighting a strong correlation between BMI and thoracic OPLL.
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Purpose: Germline pathogenic variants in CHEK2 confer moderately elevated breast cancer risk (odds ratio, OR ∼ 2.5), qualifying carriers for enhanced breast cancer screening. Besides pathogenic variants, dozens of missense CHEK2 variants of uncertain significance (VUS) have been identified, hampering the clinical utility of germline genetic testing (GGT).

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Background: infection is a well-known risk factor for gastric cancer. However, the contribution of germline pathogenic variants in cancer-predisposing genes and their effect, when combined with infection, on the risk of gastric cancer has not been widely evaluated.

Methods: We evaluated the association between germline pathogenic variants in 27 cancer-predisposing genes and the risk of gastric cancer in a sample of 10,426 patients with gastric cancer and 38,153 controls from BioBank Japan.

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  • - The study aimed to explore the genetic factors linked to age-related macular degeneration (AMD) specifically within a Japanese population by conducting a genome-wide association study (GWAS).
  • - Researchers analyzed data from nearly 4,000 AMD patients and over 16,000 controls, identifying six genetic loci significantly associated with AMD, including two novel loci not previously linked to the disease.
  • - The findings also revealed that these novel loci were associated with another eye condition, central serous chorioretinopathy (CSC), suggesting potential shared genetic mechanisms between AMD and CSC.
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Background & Aims: The heritability and actionability of variants in homologous recombination-related genes in biliary tract cancers (BTCs) are uncertain. Although associations between BTC and BRCA germline variants have been reported, homologous recombination deficiency has not been investigated in BTCs.

Methods: We sequenced germline variants in 27 cancer-predisposing genes in 1,292 BTC cases and 37,583 controls without a personal nor family history of cancer.

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Upper urinary tract urothelial carcinoma is a rare cancer that has been associated with mismatch repair genes such as MLH1, MSH2, MSH6 and PMS2. In addition, patients with pathogenic variants of cancer-predisposing genes such as BRCA1 and BRCA2 have been reported. However, how cancer-predisposing genes affect the risk of upper urinary tract urothelial carcinoma in the Japanese population remains unclear.

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The application of advanced molecular technology has significantly expanded lymphoma classification, allowing risk stratification and treatment optimization. Limited evidence suggests the presence of a genetic predisposition in lymphoma, indicating the potential for better individualized clinical management based on a novel lymphoma classification. Herein, we examined the impact of germline pathogenic variants in 27 cancer-predisposing genes with lymphoma risk and explored the clinical characteristics of pathogenic variant carriers.

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  • - The study investigates the impact of germline variants in genes related to homologous recombination repair on advanced prostate cancer (PCa) outcomes, particularly regarding hormonal therapy effectiveness.
  • - Researchers analyzed germline DNA from 549 Japanese men with metastatic or castration-resistant PCa and found that 8% carried pathogenic variants, mainly in BRCA2, HOXB13, PALB2, and ATM.
  • - Significant associations were noted between these gene variants and reduced survival time, indicating that mutations in BRCA1, BRCA2, PALB2, and ATM may serve as independent indicators of poor hormonal therapy response in advanced PCa.
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Active ingredients may be ingested through foods, and they can cause several interactions in the human body. Although drug-drug or drug-food interactions are evaluated before the approval of medicines, several functional food interactions are not well-documented because of the wide range of possible combinations of interactions. In this study, we examined the chemical reactions between hydroxycinnamic acids (HCAs), a group of polyphenols, and metal ions in artificial gastric juice or artificial intestinal fluid.

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