Publications by authors named "Yuki Kasai"

Article Synopsis
  • The study aimed to identify dosimetric factors that predict the risk of brain necrosis (BN) in patients undergoing fractionated stereotactic radiotherapy (SRT) for brain metastases.
  • Researchers used multivariate logistic models to analyze data from patients who received various SRT doses, calculating the volume of normal brain exposed to specific biological doses (VxxEQD2).
  • Results indicated that larger volumes of the brain receiving higher doses (V55EQD2 and V60EQD2) were associated with increased chances of developing symptomatic BN, emphasizing the need for careful planning to minimize exposure.
View Article and Find Full Text PDF

Purpose: Opioid-induced constipation is the most frequent and non-self-limiting adverse effect of opioid analgesia, reducing adherence and interfering with pain relief. This clinical trial aimed to clarify the preventive effect of naldemedine versus placebo for constipation in patients with cancer starting regularly dosed strong opioids therapy.

Methods: This multicenter, double-blinded, randomized, placebo-controlled, confirmatory trial was conducted between July 2021 and May 2023 at four academic hospitals in Japan (Japan Registry of Clinical Trials identifier: jRCTs031200397).

View Article and Find Full Text PDF

Although handheld ultrasound devices (HUDs) are commonplace, their ability to diagnose fecal retention (FR) remains unclear. This prospective observational study examined HUDs' usefulness in diagnosing FR in patients with constipation in a palliative care setting. Between 10 December 2020 and 30 June 2022, we compared rectal ultrasonographic findings obtained using HUDs with clinical manifestations in 64 males and 70 females (48%, 52%, 68 ± 11 years old) with constipation who had undergone computed tomography (CT).

View Article and Find Full Text PDF

Background: Previously, we isolated a mutant of Parachlorella kessleri named strain PK4 that accumulated higher concentrations of lipids than the wild-type strain. Resequencing of the PK4 genome identified mutations in three genes which may be associated with the high-lipid phenotype. The first gene, named CDMT1, encodes a protein with a calcium-dependent membrane association domain; the second gene, named DMAN1, encodes endo-1,4-β-mannanase, while the third gene, named AATPL1, encodes a plastidic ATP/ADP antiporter-like protein.

View Article and Find Full Text PDF

Background/aims: The precise incidence of symptomatic uncomplicated diverticular disease (SUDD) and its effects on the quality of life (QOL) remain unclear, particularly in Asian patients with right-sided SUDD. We assess the prevalence of SUDD and its impact on QOL in a real-world population.

Methods: Five institutional cohorts of patients who received outpatient treatment for unexplained abdominal symptoms from January 15, 2020 to March 31, 2022, were included.

View Article and Find Full Text PDF

Background: Cholesterol levels and bile acid metabolism are important drivers of metabolic dysfunction-associated steatohepatitis (MASH) progression. Using a mouse model, we investigated the mechanism by which cholesterol exacerbates MASH and the effect of colestyramine (a bile acid adsorption resin) and elobixibat (an apical sodium-dependent bile acid transporter inhibitor) concomitant administration on bile acid adsorption and MASH status.

Methods: Mice were fed a high-fat high-fructose diet with varying concentrations of cholesterol to determine changes in fatty liver according to liver status, water intake, defecation status, insulin resistance, bile acid levels, intestinal permeability, atherosclerosis (in apolipoprotein E knockout mice), and carcinogenesis (in diethylnitrosamine mice).

View Article and Find Full Text PDF

Objectives: The objective of the study is to analyze the difference in target dose distributions between Acuros XB (AXB) and collapsed cone convolution (CCC)/superposition and the impact of the tumor locations in clinical cases of stereotactic ablative body radiotherapy (SABR) for lung cancer.

Materials And Methods: Ninety-six patients underwent SABR for lung cancers Kyushu University Hospital from 2014 to 2017. We recalculated clinical plans originally calculated by AXB using CCC with the identical monitor units (MUs) and beam arrangements.

View Article and Find Full Text PDF
Article Synopsis
  • Chronic Intestinal Pseudo-Obstruction (CIPO) is a rare disorder causing episodes of intestinal blockage without any physical obstruction, and this study aims to understand its progression and care needs in adults.
  • The research looked at 74 patients over 11 years, specifically analyzing their age of onset, nutritional health, treatment methods, and the role of palliative care, noting that 64% of the patients were women.
  • The findings revealed a high prevalence of primary CIPO, many patients required specialized nutrition and decompression treatments, and a significant portion desired palliative care, highlighting the need for improved treatment strategies and psychological support.
View Article and Find Full Text PDF
Article Synopsis
  • - The study aimed to investigate differences in clinical characteristics and pancreatic enzyme abnormalities between patients with functional dyspepsia (FD) alone and those with FD overlapping with irritable bowel syndrome (IBS).
  • - Results showed that patients with FD-IBS overlap reported worse symptoms after eating high-fat meals, even though pancreatic enzyme abnormalities were more prevalent in FD alone patients.
  • - The presence of elevated levels of protease-activated receptor 2 (PAR2) in degranulated eosinophils in the duodenum was found to be significantly higher in the FD-IBS overlap group, suggesting a link to the condition's pathophysiology.
View Article and Find Full Text PDF

Background And Aim: Non-alcoholic fatty liver disease (NAFLD) can progress in non-obese patients as in obese patients. Reports on long-term prognosis in non-obese NAFLD patients are controversial. Therefore, we aimed to examine the long-term prognosis of non-obese patients with NAFLD.

View Article and Find Full Text PDF

Introduction: Non-alcoholic fatty liver disease (NAFLD) is a metabolic syndrome phenotype in the liver and thus obviously associated with metabolic abnormalities, including insulin resistance-related to hyperglycaemic and hyperlipidaemia. The prevalence of NAFLD is increasing worldwide. However, currently, there is no consensus regarding the efficacy and safety of drugs used to treat patients with NAFLD/non-alcoholic steatohepatitis (NASH).

View Article and Find Full Text PDF

Background: Approximately 60% of patients with chronic constipation (CC) have a significantly higher rate of loss of defecation desire (LODD). Bile acids are expected to have a restorative effect on defecation desire (DD) because they lower the rectal sensory threshold, which is an objective index of DD. Elobixibat (EXB) specifically inhibits the ileal bile acid transporter/apical sodium-dependent bile acid transporter, which is a transporter involved in the reabsorption of bile acids in the terminal ileum.

View Article and Find Full Text PDF

Introduction: Chronic constipation (CC) is a functional disorder that negatively impacts the quality of life of patients. This is a protocol for a multicentre, 12-week, randomised, double-blind, placebo-controlled study to test the efficacy and safety of elobixibat (EXB) versus placebo in patients with CC.

Methods And Analysis: This will be a multicentre, double-blind, placebo-control, randomised controlled trial.

View Article and Find Full Text PDF
Article Synopsis
  • A study was conducted to analyze bile acids (BAs) in both blood and stool of patients with nonalcoholic fatty liver disease (NAFLD) compared to healthy participants, as previous reports on this were lacking.
  • The research involved 287 participants, with samples collected to measure various BAs and a marker for BA synthesis across different levels of fibrosis.
  • Findings showed that both fecal and serum BAs were significantly higher in NAFLD patients, especially those with worse fibrosis, indicating that abnormal BA metabolism may contribute to the progression of NAFLD and could be targeted for therapy.
View Article and Find Full Text PDF

Opioid-induced constipation (OIC) may occur in patients receiving opioid treatment, decreasing their quality of life (QOL). We compared the effectiveness of magnesium oxide (MgO) with that of naldemedine (NAL) in preventing OIC. This proof-of-concept, randomized controlled trial (registration number UMIN000031891) involved 120 patients with cancer scheduled to receive opioid therapy.

View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to compare clinical symptoms and eating patterns between patients with functional dyspepsia (FD) and those with functional dyspepsia along with pancreatic enzyme abnormalities (FD-P) in Singapore and Japan.
  • A total of 198 patients were analyzed, focusing on various clinical characteristics, symptoms related to dietary fat intake, and related questionnaires assessing anxiety and quality of life.
  • The findings revealed that while there were no major demographic or clinical differences between the two groups, FD-P patients experienced significantly more epigastric pain and early satiety after fat meals, suggesting these symptoms could help differentiate between the two conditions, particularly in Japan.
View Article and Find Full Text PDF

Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease worldwide. It occurs with a prevalence of up to 25%, of which 10-20% cases progress to nonalcoholic steatohepatitis (NASH), cirrhosis, and liver cancer. The histopathology of NASH is characterized by neutrophilic infiltration, and endotoxins from gram-negative rods have been postulated as a contributing factor.

View Article and Find Full Text PDF

The liver directly accepts blood from the gut and is, therefore, exposed to intestinal bacteria. Recent studies have demonstrated a relationship between gut bacteria and nonalcoholic fatty liver disease (NAFLD). Approximately 10-20% of NAFLD patients develop nonalcoholic steatohepatitis (NASH), and endotoxins produced by Gram-negative bacilli may be involved in NAFLD pathogenesis.

View Article and Find Full Text PDF

Background: Constipation is a common, distressing complication in patients with cancer receiving palliative care. Elobixibat is a novel inhibitor of the ileal bile acid transporter that is used to treat chronic constipation by stimulating bowel function. However, its efficacy in patients with cancer has not been examined.

View Article and Find Full Text PDF

Background And Aim: Gut microbiota composition is associated with the pathogenesis of non-alcoholic fatty liver disease. However, the association between gut microbiota composition and non-alcoholic fatty liver disease in non-obese patients remains unclear. We compared clinical parameters and gut microbiota profiles of healthy controls and non-obese and obese patients with non-alcoholic fatty liver disease.

View Article and Find Full Text PDF

Neuroendocrine tumors (NETs) are rare, but their worldwide incidence is gradually increasing. NETs are generally heterogeneous; however, in rare cases, they have been shown to change their phenotype (i.e.

View Article and Find Full Text PDF

Mass sensors based on the eigenmode shift of coupled cantilevers achieve much higher sensitivity than those based on the single cantilever's eigenfrequency shift. In the former sensors, two identical cantilevers and a weak coupling stiffness between them are required to achieve high sensitivity. However, conventional coupled cantilevers cannot satisfy these requirements because of machining accuracy.

View Article and Find Full Text PDF

Here, we present the complete genome sequence of sp. strain DN11, a denitrifying bacterium capable of anaerobic benzene degradation. The DN11 genome is 4,956,835 bp long with a G+C content of 66.

View Article and Find Full Text PDF

TomoDirect has been reported to have some advantages over TomoHelical in delivering total body irradiation (TBI). This study aimed to investigate the relationships between the number of ports and the dose evaluation indices in low-dose TBI in TomoDirect mode using 2-12 ports and to compare these data with those for the TomoHelical mode in a simulation study. Thirteen patients underwent low-dose TBI in TomoHelical mode from June 2015 to June 2016.

View Article and Find Full Text PDF

We previously developed a self-cloning system that introduces cDNA of the uridine monophosphate synthase gene (cUMPS) of Coccomyxa sp. strain Obi as a selectable marker into uracil-auxotrophic mutants (Ura) of the same alga. Here, we developed a Cre/loxP-based system for the removal of cUMPS flanked by directly repeated loxP sites from the Coccomyxa genome using the intracellular delivery of purified Cre recombinase to generate an Ura strain that was used as a host for second-round transformation using cUMPS as the selection marker.

View Article and Find Full Text PDF