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The specific hypotheses are:
Gluten supplementation for four weeks increases small intestinal permeability and accelerates colonic transit in patients with irritable bowel syndrome with diarrhea (IBS-D) or functional diarrhea (FD) who are HLA-DQ2 positive.
The study design is a double-blind, randomized, controlled, parallel-group, 6-week study comparing the effects of gluten rich versus gluten free diets in diarrhea or diarrhea predominant IBS patients. All participants will keep a daily bowel pattern diary throughout the study. All participants will have negative serum tissue transglutaminase (TTg) assay, and anti-endomysial antibody test, if TTg is positive or equivocal. All participants will have the following studies performed both before and after the 4-week dietary intervention:
1. Stool samples to check markers of inflammation such as fecal calprotectin.
2. Blood samples to check markers of inflammation and for genetic testing.
3. After ingestion of the mannitol, lactulose and sucralose sugars, urine samples to indirectly measure small intestinal and colonic permeability.
4. After sedation, upper gastrointestinal endoscopy and flexible sigmoidoscopy to obtain 6 mucosal biopsies from the small bowel and sigmoid colon for immunohistochemical analysis.
5. Scintigraphy to measure gastrointestinal transit.
Allocation: Randomized, Control: Active Control, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator), Primary Purpose: Treatment
Gluten free diet, Gluten rich diet
Published on BioPortfolio: 2014-07-23T21:09:43-0400
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A diet which is devoid of GLUTENS from WHEAT; BARLEY; RYE; and other wheat-related varieties. The diet is designed to reduce exposure to those proteins in gluten that trigger INFLAMMATION of the small intestinal mucosa in patients with CELIAC DISEASE.
A malabsorption syndrome characterized by collagenous mucosal lesions of the SMALL INTESTINE, atrophy of MICROVILLI, severe malabsorption, diarrhea, and MALNUTRITION often refractory to a gluten-free diet.
A diet rich in DIETARY CARBOHYDRATES.
A diet that contains limited amounts of CARBOHYDRATES. This is in distinction to a regular DIET.
Regular course of eating and drinking adopted by a person or animal. This does not include DIET THERAPY, a specific diet prescribed in the treatment of a disease.
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