Publications by authors named "Ohtsuka K"

Background & Aims: Although biologic therapy has revolutionized the treatment of Crohn's disease (CD), surgery remains unavoidable in cases involving ileal complications. We aimed to evaluate the efficacy of biologics on proximal ileal lesions using balloon-assisted enteroscopy (BAE).

Methods: This open-label multicenter prospective study was conducted at tertiary referral centers in Japan.

View Article and Find Full Text PDF

Although small hypervascular tumors are suspected to be pancreatic neuroendocrine tumors (p-NENs), their diagnosis and treatment are challenging. This study evaluated the usefulness of endoscopic ultrasound-guided tissue acquisition (EUS-TA) for diagnosis of small p-NENs. All p-NEN lesions that underwent EUS-TA at our hospital between April 2018 and December 2023 were retrospectively analyzed.

View Article and Find Full Text PDF

Background/aims: The efficacy and safety of tofacitinib for the treatment of refractory ulcerative colitis (UC) has been demonstrated in clinical trials. Although, a series of reports with real-world evidence of its short-term efficacy and safety profiles have already been published, reports of long-term real-world data have been limited. We aimed to show our 3-year evidence on the clinical use of tofacitinib for the treatment of UC, focusing on its efficacy and safety profiles.

View Article and Find Full Text PDF
Article Synopsis
  • * The research involved 110 patients in remission and analyzed data from over 74,000 colonoscopy images, tracking patients for a year to see how well AI could predict relapse events compared to traditional methods.
  • * Results showed that higher AI-based MES scores were linked to a significantly increased relapse rate, and the AI system improved consistency in diagnostic assessments made by non-specialist endoscopists.
View Article and Find Full Text PDF
Article Synopsis
  • The text indicates that there is a correction to a previously published article.
  • The article is identified by its DOI (Digital Object Identifier): 10.1371/journal.pone.0277770.
  • This correction aims to address errors or issues found in the original publication.
View Article and Find Full Text PDF
Article Synopsis
  • A 45-year-old man with a history of Crohn's disease (CD) was effectively treated with vedolizumab and maintained in clinical remission.
  • He experienced complications including elevated liver enzymes, splenomegaly, and thrombocytopenia, leading to a diagnosis of granulomatous hepatitis from a liver biopsy.
  • This case highlights the rare occurrence of liver complications, specifically portal hypertension, linked to granulomatous hepatitis, even when intestinal symptoms of CD remain stable.
View Article and Find Full Text PDF

The field-induced quantum-disordered state of layered honeycomb magnet α-RuCl is a prime candidate for Kitaev spin liquids hosting Majorana fermions and non-Abelian anyons. Recent observations of anomalous planar thermal Hall effect demonstrate a topological edge mode, but whether it originates from Majorana fermions or bosonic magnons remains controversial. Here, we distinguish these origins from combined low-temperature measurements of high-resolution specific heat and thermal Hall conductivity with rotating magnetic fields within the honeycomb plane.

View Article and Find Full Text PDF
Article Synopsis
  • The study examined 354 patients with primary small bowel adenocarcinoma (PSBA) in Japan, revealing a median age of 67 years and a majority being male (61.6%).
  • The majority of tumors were located in the jejunum (66.2%) and ileum (30.4%), with over 76% of patients presenting symptoms at diagnosis, often at an advanced stage.
  • The research found that clinical stage was the main predictor of disease-specific survival, emphasizing the importance of early detection for better patient outcomes.
View Article and Find Full Text PDF

Escherichia albertii is an emerging foodborne pathogen that causes diarrhea. E. albertii has been isolated from various foods, including pork and chicken meat, and environmental waters, such as river water.

View Article and Find Full Text PDF
Article Synopsis
  • This study explored the characteristics and outcomes of stage IV small bowel adenocarcinoma (SBA) in Japan, analyzing data from 128 patients to determine the effectiveness of different treatment strategies.
  • The treatments included chemotherapy alone, surgery alone, surgery combined with chemotherapy, and best supportive care, revealing a median overall survival of 16 months, with the best outcomes seen in those receiving surgery and chemotherapy.
  • Results indicated that patients who underwent surgery or chemotherapy had better survival rates compared to those with best supportive care, and survival did not significantly vary among different chemotherapy regimens.
View Article and Find Full Text PDF

Background And Aims: Image-enhanced endoscopy has attracted attention as a method for detecting inflammation and predicting outcomes in patients with ulcerative colitis (UC); however, the procedure requires specialist endoscopists. Artificial intelligence (AI)-assisted image-enhanced endoscopy may help nonexperts provide objective accurate predictions with the use of optical imaging. We aimed to develop a novel AI-based system using 8853 images from 167 patients with UC to diagnose "vascular-healing" and establish the role of AI-based vascular-healing for predicting the outcomes of patients with UC.

View Article and Find Full Text PDF

Objectives: This study investigates how online frame-of-reference (FOR) training of raters of the objective structured clinical examination (OSCE) for physical therapy students affects assessment accuracy.

Methods: The research was conducted in a 1-month-long randomized controlled trial.

Participants: The participants were 36 physical therapists without experience assessing clinical skills using the OSCE.

View Article and Find Full Text PDF

Objectives: The purpose of this study was to capture the lifestyle characteristics of traumatic brain injury (TBI) patients by administering the Frenchay Activities Index (FAI), a self-assessment questionnaire used for assessing life-related activities, among TBI patients.

Methods: This study was conducted using the revised FAI Self-Assessment Form, administering an interview-based questionnaire survey to TBI patients and healthy participants. The target group comprised 60 traumatic brain injury patients who had progressed from at least 1 year since the injury, with a comparison group of 788 healthy participants.

View Article and Find Full Text PDF

Objective: The association between the severity of COVID-19 and gastrointestinal (GI) bleeding is unknown. This study aimed to determine whether the severity of COVID-19 is a risk factor for GI bleeding.

Design: A multicentre, retrospective cohort study was conducted on hospitalised patients with COVID-19 between January 2020 and December 2021.

View Article and Find Full Text PDF

Background/aims: Endoscopic activity confirmed by enteroscopy is associated with poor clinical outcome in Crohn's disease (CD). We investigated which of the existing biomarkers best reflects endoscopic activity in CD patients including the small bowel, and whether their combined use can improve accuracy.

Methods: One hundred and four consecutive patients with ileal and ileocolonic type CD who underwent balloon-assisted enteroscopy (BAE) from October 2021 to August 2022 were enrolled, with clinical and laboratory data prospectively collected and analyzed.

View Article and Find Full Text PDF

The diazo-transfer reaction of nonactivated ketone under mild reaction conditions was developed. Various nonactivated ketones such as aryl methyl ketones, -alkyl methyl ketones, and cyclic ketones were transformed into their corresponding α-diazoketones in one step by treating 2-azido-1,3-bis(2,6-diisopropylphenyl)imidazolium hexafluorophosphate (IPrAP) in the presence of PrNH in ethylene glycol. In the reaction of IPrAP with -alkyl methyl ketone and -alkyl aryl ketones, migratory amidation proceeded under the reaction conditions to afford the corresponding amides.

View Article and Find Full Text PDF

Ankle-foot orthosis (AFO) is known to correct abnormal gait patterns and improve walking stability and speed in patients with hemiparesis. To quantify these benefits in post-stroke gait, a three-dimensional motion analysis of gait pattern was conducted. Forty patients with hemiparesis were enrolled.

View Article and Find Full Text PDF

Guidewires play a crucial role in endoscopic retrograde cholangiopancreatography. The ability to pass through stenosis, and the ability to seek the desired biliary branch are particularly important. In this study, we aimed to compare these specific abilities in various guidewires by using a bile duct model.

View Article and Find Full Text PDF

A 30-year-old female patient presented with monthly episodes of severe intermittent upper abdominal pain, especially after consuming fatty meals. Over a period of 5 years, she visited the emergency department 21 times due to the intensity of the pain. Although the pain appeared consistent with biliary pain, both blood and imaging tests showed no abnormalities.

View Article and Find Full Text PDF

The MRE11A-RAD50-NBS1 complex activates the ataxia-telangiectasia mutated (ATM) pathway and plays a central role in genome homeostasis. The association of RAD50 mutations with disease remains unclear; hence, we adopted a medaka rad50 mutant to demonstrate the significance of RAD50 mutation in pathogenesis using the medaka as an experimental animal. A 2-base pair deletion in the rad50 gene was introduced into transparent STIII medaka using the CRISPR/Cas9 system.

View Article and Find Full Text PDF

Background: COPD is characterized by progressive and irreversible air flow limitations. Single-inhaler therapies (SITTs) incorporating an inhaled corticosteroid, a long-acting muscarinic antagonist, and a long-acting β-agonist have been shown to effectively alleviate symptoms and improve lung function. Fluticasone-furoate/umeclidinium/vilanterol (F/U/V) and budesonide/glycopyrronium/formoterol (B/G/F) are available as SITT in Japan.

View Article and Find Full Text PDF

An analytical method based on LC-MS/MS was developed for the determination of chlorothalonil metabolite I in livestock products. Chlorothalonil metabolite I in livestock products was extracted with acetone. The crude extracts were defatted by acetonitrile and n-hexane partitioning.

View Article and Find Full Text PDF

Introduction: Leucine-rich alpha-2 glycoprotein (LRG) is a newly studied biomarker for inflammatory diseases. This study aimed to investigate whether LRG can be used for evaluating transmural activity in patients with Crohn's disease (CD).

Methods: We performed magnetic resonance enterography (MRE) in 227 consecutive patients with CD from June 2020 to August 2021.

View Article and Find Full Text PDF

Behcet's disease (BD) is a multisystem immune-mediated inflammatory disorder that occasionally involves the gastrointestinal tract. Reports on gastrointestinal involvement of BD are relatively rare, of which gastroduodenal involvement is particularly rare. Endoscopic features of gastroduodenal lesions are unknown, and treatment strategies have not been established.

View Article and Find Full Text PDF