View clinical trials related to Irritable Bowel Syndrome.
Filter by:Objective: This study aims elucidate the pathophysiological link between the environment in the colon (mainly the microbiota), the local immune system and activation of the enteric nervous system in patients with post-infectious IBS (PI-IBS) and microscopic colitis (MC) with special emphasis on microbial-mucosa interactions and evaluation of the effect on the immune activation/response as well as how afferent gut-brain signalling leads to abdominal discomfort. Method: The project is based on data from three cohorts of patients, one with PI-IBS and one with MC as well as a gender- and age-matched cohort of healthy individuals. Measurement of perceived sensitivity in the gut will be evaluated by pain-response under mechanical stress using a barostat. The HIT (Human intestinal Tissue)-Chip array will be used to characterize the diversity, stability and functionality of the intestinal microbiota on mucosa level, giving a clue to the interactions with the host and insight to changes leading to the development of the two diseases. Immunohistochemistry and flowcytometry will be used to analyse the location, frequency and phenotype characteristics of lymphoid- and mast cells. Functional analysis of mucosal lymphocytes activated in vitro by products from the intestinal microbiota will be examined by cytokine production using the LuminexTM system. The Ussing chamber technique will allow investigation of the impact of the microbiota and its metabolites on intestinal barrier functions. In this method the sample has access to stressors under standard conditions.
Irritable bowel syndrome (IBS) affects about 15% of the U.S. population. There are still no effective and safe medications approved for the treatment of abdominal pain associated with bowel symptoms in IBS. This study will investigate the effects of an approved medication, Dronabinol, on the movement of food through the stomach and colon in subjects with a history of diarrhea-predominant Irritable Bowel Syndrome (D-IBS).
This study objective is to assess the short and long term effects of partially hydrolyzed guar gum (PHGG) administration on clinical symptoms of IBS and quality of life of these patients.
The purpose of the study is to investigate if patients with Irritable Bowel Syndrome (IBS) who also report bloating are more likely to report clinically important gastrointestinal symptoms after consuming fructose or fructans than after consuming glucose. We will also use MRI imaging to investigate the mechanisms by which those symptoms might be caused. We will also study a parallel group of age and gender frequency matched healthy volunteers to provide descriptive statistics on a likely reference range for the healthy population. Irritable Bowel Syndrome (IBS) is a common chronic condition, the main features of which are pain in the abdomen, an erratic bowel habit and sometimes bloating. Recent research has found that certain carbohydrates (sugars) in the diet can cause symptoms such as discomfort, bloating and wind/gas in people with IBS. These sugars are not well digested in the small bowel. They move to the colon (large bowel) where bacteria act on them by fermentation, producing gas. Some of the gas is absorbed and breathed out through the lungs, where we can measure it. The rest is released as flatulence/ wind, or occasionally belching. People without IBS rarely get symptoms after consuming these sugars. We want to find out what is different in IBS sufferers. We will study fructose and fructans, sugars found in fruit, vegetables and wheat. Fructose draws water into the small bowel but fructans do not so we can compare effects on the small bowel and colon. Participants will attend three times, and on each occasion consume a drink containing either fructose, fructans, or glucose - a sugar that does not cause symptoms. Neither they nor the investigators present will know which drink is which. They will record their symptoms over the next 5 hours. We will observe how many report a clinically important increase in symptoms. To look at what is happening in the bowel we will use a technique called Magnetic Resonance Imaging (MRI). We want to see if more gas, or water, builds up in people with IBS than in healthy volunteers. We will also measure the amount of hydrogen released in the breath to see if this is could be a simple bedside test that agrees with the MRI findings Finding differences between the response of participants to fructose, fructans and glucose could change the way we advise patients, and could lead to the use of MRI as a test for IBS.
After 2 weeks of run-in period, subjects are randomized to either IQP-CL-101 or a matching placebo. Over 8 weeks, the subjects are monitored for improvements in IBS symptoms
Increased physical activity has in the investigators recent study been shown to improve symptoms in irritable bowel syndrome (IBS). The aim of this study was to assess the long term effects of the investigators previous intervention in IBS patients to improve physical activity. The investigators aimed to assess the long term effects on IBS symptoms as well as quality of life, fatigue, depression and anxiety.
This study will evaluate the efficacy of duloxetine in reducing depressive symptoms, abdominal pain, and other symptoms of Irritable Bowel Syndrome (IRS) in a population of outpatients with Major Depressive Disorder MDD and clinical symptoms of IBS.
To evaluate the efficacy and safety of YM060 once daily for female patients with diarrhea-predominant irritable bowel syndrome (D-IBS) for a long-term period (up to 52 weeks).
Background: - Some research studies focus on digestive disorders, such as nutritional, gastrointestinal, and liver disorders. Researchers want to examine and treat people with digestive disorders in order to learn more about these disorders. They also want to study how digestive disorders run in some families. To do so, they will provide standard care to people with digestive disorders. They will also look at relatives of people with digestive disorders, such as parents, children, and siblings. Objectives: - To examine and treat people with digestive disorders. - To evaluate people with digestive disorders for research studies. Eligibility: - Individuals of any age who have digestive disorders. - Individuals at least 2 years of age who are first-degree relatives of the people with digestive disorders. Design: - Participants will have at least one outpatient visit to the National Institutes of Health. The visit will last about 2 hours. - All participants will be screened with a physical exam and medical history. They will also provide different samples for study. Samples may include blood, urine, and stool samples. Saliva and hair samples may also be taken. Skin biopsies and rectal swabs may be collected from adult participants. - Participants with digestive disorders may be able to receive treatment through this study.
The purpose of this study is to analyse the effect of a probiotic supplement on functional intestinal symptoms among subjects diagnosed with irritable bowel syndrome (IBS).