Glutamine for the Treatment of Patients With Irritable Bowel Syndrome (AT005291)
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government.
Read our disclaimer for details.
New and effective treatments are needed for patients with post-infectious irritable bowel syndrome (PI-IBS). We conducted a randomized, placebo-controlled trial to assess the efficacy and safety of glutamine, an abundant amino acid in the body and the principal fuel for enterocytes, in patients who developed diarrhea-predominant irritable bowel syndrome with increased intestinal permeability following an enteric infection.
Condition or disease
Diarrhea-Predominant Irritable Bowel Syndrome
In a double-blind trial, eligible adults with post-infectious IBS with increased intestinal permeability were randomly assigned to receive either glutamine (5 g three times daily) or placebo for eight weeks. The primary end point was the proportion of patients who had a reduction of ≥50 on the Irritable Bowel Severity Scoring System (IBS-SS).
Change in the Irritable Bowel Symptom Severity Scale [ Time Frame: baseline and 8 weeks following therapy ]
The primary outcome measure will be a change in the Irritable Bowel Symptom Severity Scale (IBS-SS) from baseline to 8 weeks at the conclusion of therapy. The IBS-SS scale ranges from 0 to 500 (worst). A decrease in 50 or greater in the IBS-SS is considered a positive response.
Secondary Outcome Measures :
Intestinal Permeability [ Time Frame: baseline and 8 weeks following therapy ]
The secondary outcome measure will be a change in intestinal permeability from baseline to 8 weeks at the conclusion of therapy. Intestinal permeability is measured by the urinary lactulose/mannitol ratio following ingestion of a solution of lactulose and mannitol.
Stool Frequency [ Time Frame: Baseline and 8 weeks following therapy ]
Baseline and 8 week at the conclusion of therapy
Stool Consistency [ Time Frame: Baseline and 8 weeks following therapy ]
Bristol Stool Scale The Bristol Stool Scale characterizes stool characteristics and ranges from a minimum score of 1 with depicts hard or constipated stool to a maximum score of 7 which is watery or diarrheal stools. In this trial, stool that is less than 7 is better and depicts a good outcome.
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Layout table for eligibility information
Ages Eligible for Study:
18 Years to 72 Years (Adult, Older Adult)
Sexes Eligible for Study:
Accepts Healthy Volunteers:
men and women age 18-72 years old who developed post-infectious diarrhea-predominant IBS (D-IBS)
increased intestinal permeability on Lactulose/Mannitol permeability test
able and willing to cooperate with the study
*absence of alcohol or NSAIDs ingestion for 2 weeks prior to inclusion into study and throughout the study duration
current participation in another research protocol or unable to give informed consent
women with a positive urine pregnancy test or breastfeeding
history of inflammatory bowel disease, lactose intolerance, and/or celiac sprue
+ hydrogen breath test for bacterial overgrowth
+ antiendomysial antibody titer
use of nonsteroidal antinflammatory drug(NSAIDs) 2 weeks before or during the study
known allergy to glutamine
abdominal surgery except for removal of gallbladder, uterus, or appendix