Publications by authors named "Kazuhiko Uchiyama"

Background: Proton pump inhibitors (PPIs) and potassium-competitive acid blockers (PCABs) have been reported to alter the gut microbiota. However, the relationship between these alterations and stool properties remains unclear. This study aimed to examine changes in the gut microbiota, stool consistency, and subjective symptoms related to defecation after antacid treatment.

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Water-soluble cellulose acetate (WSCA), derived from natural cellulose and acetate, can be used as a food additive and deliver acetate to the large intestine. In this study, we investigated the effects of dietary WSCA supplementation on impaired glucose metabolism in db/db mice, a model of type 2 diabetes mellitus. db/m and db/db mice were fed either a control diet or a WSCA-supplemented diet for eight weeks.

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Objectives: This study aimed to compare the short-term therapeutic outcomes between conventional endoscopic submucosal dissection (C-ESD) and gel immersion ESD (GI-ESD) for superficial non-ampullary duodenal epithelial tumors (SNADETs).

Methods: A retrospective analysis was conducted on patients with SNADETs who underwent C-ESD or GI-ESD between June 2016 and May 2024. To reduce proficiency bias, the first 50 cases per endoscopist were excluded.

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Background And Aim: The association between vascular cell adhesion molecule-1 (VCAM-1) expression and intestinal mucosal inflammation and between VCAM-1 expression and the clinical course in patients with ulcerative colitis (UC) remains unclear. Therefore, we investigated not only the association between mucosal VCAM-1 expression and mucosal inflammation but also its association with subsequent relapse in UC patients with clinical remission.

Methods: Fifty-eight patients with UC in clinical remission and 16 patients in clinical active who visited Kyoto Prefectural University of Medicine for a 2-year follow-up period were included.

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Introduction: Biopsy-specimen examination is the gold standard for the preoperative histological diagnosis of early gastric cancer (EGC). However, few studies have compared the diagnostic accuracies of biopsy and magnifying endoscopy with narrow-band imaging or blue laser imaging (ME-NBI/BLI). Thus, we compared the diagnostic accuracy of biopsy specimens and ME-NBI/BLI to evaluate whether ME-NBI/BLI is a feasible preoperative diagnostic tool for EGC.

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Zinc is an essential element and important for inflammatory bowel disease patients. Herein, we aimed to elucidate the correlation between serum zinc concentration and various parameters, especially the disease activity index and endoscopic scores, in these patients. We measured serum zinc concentrations in 37 patients with Crohn's disease and 64 with ulcerative colitis and retrospectively analyzed patient characteristics, blood test values, disease activity, and endoscopic scores.

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Objectives: Effective treatments for diarrhea-type irritable bowel syndrome (IBS-D) are limited. Hangeshashinto (HST), an anti-inflammatory Kampo medicine, may offer benefits but its efficacy for IBS-D requires further investigation. This study evaluated IBS-D symptom improvement and gut microbiota changes following HST administration.

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Nivolumab has been approved for unresectable recurrent advanced esophageal cancer. The present study aimed to provide real-world data on diverse patient profiles, including the elderly and those with poor performance status, while exploring therapeutic efficacy biomarkers. This retrospective study included 42 patients with esophageal cancer who received nivolumab after second- or later-line treatment at Kyoto Prefectural University of Medicine (Kyoto, Japan) from February 2020 to December 2021.

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Cancer cachexia is a complex disorder characterized by skeletal muscle loss, which may influence the prognosis of patients with cancer. The cachexia index (CXI) is a new index for cachexia. The present study aimed to assess whether the CXI determined by bioelectrical impedance analysis (BIA) is valuable for predicting survival in patients with gastrointestinal cancer.

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Objectives: A novel self-assembling peptide gel (SAPG) was recently developed for hemostasis during endoscopic resection (ER) as an alternative for electrocoagulation and clip placement. Therefore, this exploratory study aimed to evaluate the hemostatic effect of SAPG on bleeding during ER of the duodenum.

Methods: Patients with superficial duodenal epithelial tumors who underwent endoscopic submucosal dissection (ESD) or cold-snare polypectomy (CSP) between June 2022 and October 2023 were enrolled in the study.

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Background: This study aimed to explore the relationship between ultra-processed foods (UPFs) consumption and gut microbiota in patients with type 2 diabetes (T2D).

Methods: This cross-sectional study included 362 participants with T2D. UPFs consumption was assessed using a brief-type self-administered diet history questionnaire, quantified as the density of UPFs intake (g/1000 kcal).

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With the emergence of immune checkpoint inhibitors(ICIs)in recent years, the treatment outcomes for unresectable recurrent esophageal cancer have improved markedly. In 5-FU+cisplatin(FP)first-line therapy, 5-FU administration takes 5 days and generally requires hospitalization. However, frequent hospitalization for treatment is a crucial issue that must be resolved in terms of time investment and optimal use of hospital resources.

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Background: Ulcerative colitis (UC) is a chronic inflammatory disease of unknown cause, for which no curative treatments have been developed. Cytokines play an important role in the pathogenesis of UC, and therapies targeting specific cytokines have been successful in treating refractory UC. The purpose of this study was to measure mucosal cytokines in UC and identify those that contribute to nonrelapsing mucosal healing (MH) diagnosed by endoscopy.

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Article Synopsis
  • * The study involved 2,962 patients in Japan, using upper gastrointestinal endoscopy to assess various conditions related to GERD and to analyze the correlation of symptoms using the FSSG and GSRS scoring systems.
  • * Results indicate that FSSG and GSRS scores are effective in diagnosing the severity of reflux esophagitis, with FSSG scores linked to mucosal atrophy and GSRS scores relating to the functionality of the gastroesophageal flap.
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Texture and color enhancement imaging (TXI) may improve the visibility of gastric tumors and allow their early detection. However, few reports have examined the utility of TXI. Between June 2021 and October 2022, 56 gastric tumors in 51 patients undergoing endoscopic submucosal dissection at Fukuchiyama City Hospital were evaluated preoperatively using conventional white light imaging (WLI), narrow-band imaging (NBI), and TXI modes 1 and 2.

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  • * Research with mice and cultured cells shows that Uro A increases mucin 2 expression and thickens colonic mucus without affecting tight junctions, which are crucial for maintaining barrier integrity.
  • * Uro A treatment also reduces gut permeability and inflammation, promotes beneficial bacteria, and works through specific signaling pathways (Nrf2 and AhR) to enhance mucus secretion and support intestinal health.
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Patients with diarrhea-predominant irritable bowel syndrome (IBS-D) show excessive peristalsis, and antispasmodic agents may be useful therapeutic agents. There are few reports on the use of Kampo medicines for the treatment of IBS-D. Shakuyakukanzoto (SKT) is a Kampo medicine that is effective against abdominal pain.

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  • Advanced gastric cancer is aggressive, and this study investigated the impact of ascites (fluid in the abdomen) on patient survival rates, using CT scans to classify ascites as none, small, moderate, or massive.
  • Patients without ascites had better overall survival (43.5% at 1 year) compared to those with ascites (29.1%), with moderate or massive ascites leading to even poorer outcomes (28.0% at 1 year).
  • Key factors influencing overall survival included cancer type (specifically diffuse-type gastric cancer), the degree of ascites, and the effectiveness of chemotherapy, with moderate or massive ascites significantly impacting survival.
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Background And Aims: This retrospective study aimed to compare the short- and long-term outcomes of endoscopic submucosal dissection and laparoscopic and endoscopic cooperative surgery in patients with superficial non-ampullary duodenal epithelial tumors.

Patients And Methods: We investigated consecutive patients with SNADETs > 10 mm in size who underwent ESD (ESD group) or LECS (LECS group) between January 2015 and March 2021. The data was used to analyze the clinical course, management, survival status, and recurrence between the two groups.

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Background And Aims: Free D-amino acids, which have different functions from L-amino acids, have recently been discovered in various tissues. However, studies on the potential interactions between intestinal inflammation and D-amino acids are limited. We examined the inhibitory effects of D-alanine on the pathogenesis of intestinal inflammation.

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  • * A cohort of 61 active UC patients was analyzed, focusing on various clinical factors like age, sex, disease type, and activity levels before treatment with the suppositore.
  • * It was found that lower activity scores and specific disease types, particularly in females, predicted better efficacy of the 5-ASA suppositories, which can help optimize patient compliance and treatment outcomes.
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  • H. pylori is a known carcinogen linked to gastric cancer, and while eradicating it lowers GC risk, cases of recurrence still occur.
  • This study aimed to explore the link between gastric mucosa-associated microbiota (G-MAM) and early gastric cancer (EGC) in patients who successfully got rid of H. pylori at least 5 years prior.
  • Results showed significant differences in certain microbial populations between patients with EGC and those without, suggesting that changes in G-MAM may play a role in cancer development even after H. pylori has been eradicated.
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Background And Objective: Several endoscopic resection methods have been developed as less invasive treatments for superficial non-ampullary duodenal epithelial tumours. This study aimed to compare outcomes of conventional endoscopic mucosal resection and underwater endoscopic mucosal resection for superficial non-ampullary duodenal epithelial tumours, including resection depth and rate of the muscularis mucosa contained under the lesion.

Methods: This single-centre retrospective cohort study conducted from January 2009 to December 2021 enrolled patients who underwent conventional endoscopic mucosal resection and underwater endoscopic mucosal resection for superficial non-ampullary duodenal epithelial tumours and investigated their clinicopathological outcomes using propensity score matching.

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  • Aortic stenosis (AS) can be linked to gastrointestinal bleeding, known as Heyde's syndrome, which is often caused by gastrointestinal angiodysplasias, although its prevalence and characteristics were previously unclear.
  • This study examined patients with severe AS who underwent transcatheter aortic valve implantation (TAVI) to assess the frequency and endoscopic features of angiodysplasia, particularly focusing on those with moderate to severe anemia.
  • Findings revealed that patients with anemia had a significantly higher rate of angiodysplasia and active bleeding compared to those without anemia, indicating a notable connection between severe AS and digestive tract complications.
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  • The study aimed to develop a new endoscopic evaluation index using linked color imaging (LCI) to predict histological healing in patients with ulcerative colitis (UC) who are in clinical remission.
  • Researchers evaluated 92 patients with a Mayo endoscopic subscore of 1 or less during colonoscopy, counting various indicators of inflammation and healing in biopsies taken from the colon.
  • Results showed that LCI index readings correlated significantly with histological healing, suggesting that the new LCI index could be a valuable tool for assessing treatment outcomes in UC patients.
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