- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05972317
The Stool Microbiome of Treated and Untreated IBS (Irritable Bowel Syndrome) Patients
Generating a Stool Microbiome-based Diagnostic for IBS (Irritable Bowel Syndrome) Patients in Low-FODMAP Treated and Untreated IBS Patients
Irritable bowel syndrome (IBS) is considered the most common gastrointestinal disorder in humans, with an estimated global prevalence of 11%-20% of all humans. Alterations in the gut microbiome are at the center of IBS, and microbiome-induced volatile metabolites in response to dietary exposures is believed to drive a downstream impact on susceptible hosts, thereby driving the disease. However, the characteristics and functions of these metabolites remain unknown to date. The two main mechanisms invoking IBS development and flares include 1) an increase in luminal water content due to malabsorption of small molecules and 2) incrementation of colon gas production generated by the fermentation of small molecules by gut bacteria.Yet to date, a person-specific elucidation of the specific small molecules and bacteria driving IBS, and their downstream effects on the human gut epithelium remain unknown.
Over the past years, it became evident that dietary regimes, and their interactions with the intestinal microbiome, are at the center of IBS symptom generation and alleviation. The most widely used dietary intervention is a highly restrictive diet, the low-Fermentable Oligo-saccharides Di-saccharides Mono-saccharides And Polyols (FODMAP) diet, based on avoidance of multiple food items that contain available fermentable molecules.
The low-FODMAP diet remains an effective line of treatment for IBS patients, yet due to its complexity and unhealthy nature, it remains a last line of treatment and fails to impact the majority of IBS patients.
Study Overview
Status
Conditions
Intervention / Treatment
Study Type
Enrollment (Estimated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Yotam Cohen
- Phone Number: +97289529173
- Email: Yotam.cohen@weizmann.ac.il
Study Contact Backup
- Name: Shimrit Eliyahu Miller
- Email: shimrit.miller@weizmann.ac.il
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Adult
- Older Adult
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Male and Female
- Age - 18-70
Exclusion Criteria:
- Consumption of antibiotics 2 months prior to the first day of the experiment.
- Consumption of probiotic supplements 1 month prior to the first day of the experiment.
- Type 1 or type 2 diabetes diagnosis.
- Pregnancy, fertility treatments, breastfeeding 3 months prior to the first day of the study.
- Chronic disease - to the discretion of the study doctor.
- Cancer and recent anticancer treatment.
- Psychiatric disorders - to the discretion of the study doctor.
- IBD (inflammatory bowel diseases).
- Alcohol or substance abuse.
- BMI > 35.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Diagnostic
- Allocation: Non-Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
No Intervention: Non-IBS
Participants which are not suffering from IBS symptoms.
|
|
Experimental: IBS -low FODMAP
individuals that are diagnosed with IBS according to Rome IV criteria
|
intervention will include a guidance by a clinical dietitian about low FODMAP diet The FODMAP diet has three phases:
|
No Intervention: FODMAP graduates
Individuals who have practiced a low-FODMAP diet in the past
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
IBS-SSS - irritable bowel syndrome severity score system questionnaire
Time Frame: 1 week
|
Severity of symptoms as they are scored in the Rome IV IBS-SSS 75 to <175 to indicate mild IBS, 175 to <300 as moderate, and >300 as severe
|
1 week
|
IBS-QOL questionnaire - irritable bowel syndrome quality of life questionnaire
Time Frame: 1 week
|
Quality of life scores from the Rome IV IBS-QOL 0-100 scale for ease of interpretation with higher scores indicating better IBS specific quality of life
|
1 week
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Stool microbiome differences between the study arms - using fecal samples of participants
Time Frame: 3 months
|
Analysis of stool samples of the different study arms - using shot-gun metagenomics to asses type of microbiota pre and post low-FODMAP diet.
|
3 months
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Eran Elinav, Prof, Weizmann Institute of Science
Study record dates
Study Major Dates
Study Start (Estimated)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 1914-4
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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