Intracolonic FODMAP Infusion in Healthy Volunteers (ICOF)

Universitaire Ziekenhuizen KU Leuven

Status: Completed

Conditions: Irritable Bowel Syndrome

Treatments: Dietary Supplement: Fermentable Oligo-, Di- Monosaccharides And Polyols (FODMAPs)

Study type: Interventional

Funder types: Other

Identifiers

NCT06488534

S67510

Details and patient eligibility

About

Irritable bowel syndrome (IBS) is one of the most common chronic diseases of the gut-brain axis. The underlying pathophysiology is multifactorial, poorly understood and differs between the subtypes: constipation-dominant IBS, diarrhea-dominant IBS, mixed IBS, and unspecified IBS. Although it is considered a motility disorder, no uniform motility patterns have been found in IBS patients and no link has yet been found between the motility patterns and the typical complaints such as nausea, fullness, cramps and flatulence. These symptoms are often diagnosed after a meal and research has shown that especially fermentable oligo, di, monosaccharides and polyols (FODMAPs) give rise to symptoms. Many studies have tested the effect of these FODMAPs after oral administration, but little is known about their direct effect on the colon. In this double-blind cross-over study, 15 healthy volunteers are subjected to 3 colonoscopies in which a catheter is placed to measure the pressures in the large intestine and to administer the dissolved FODMAPs. Volunteers will follow a diet low in fiber and FODMAPs 3 days before each study visit. In addition, they will have to record their daily bowel movements during the week of their study visit and fill in 2 short questionnaires on the day of the study visit regarding their gastrointestinal complaints. There will be at least 2 weeks between the 3 study visits to avoid any overlap between the FODMAPs.

Enrollment: 15 patients

Sex: All

Ages: 18 to 70 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Subjects should provide written informed consent to participate in the study
• Women of child-bearing potential agree to apply a highly effective method of birth control during the entire duration of the trial. Highly effective birth control is defined as those which result in a low failure rate (i.e., less than 1% per year) when used constantly and correctly such as implants, injectables, combined oral contraceptive method, or some intrauterine devices (IUDs), sexual abstinence, or vasectomized partner. Women of non-childbearing potential may be included if surgically sterile (tubal ligation or hysterectomy) or postmenopausal with at least 2 years without spontaneous menses.
• Subjects who are capable to understand the study and the questionnaires, and to comply with the study requirements.
• Healthy volunteers should consider themselves healthy and should not be medically examined

Exclusion criteria

• History of major surgery of the gastrointestinal tract (appendectomy, hemorrhoidectomy, or polypectomy greater than 3 months post-surgery are allowed).
• Known underlying organic gastrointestinal disease, including intestinal obstruction, ileus, intestinal perforation, severe inflammatory disorder like ulcerative colitis, Crohn's disease or toxic megacolon
• Diabetes mellitus types 1 and 2
• Concomitant Kidney or Liver disease, Biliary obstruction
• Decreased cardiac -or respiratory function
• Pregnant or breastfeeding women
• Use of antibiotics in the past month
• History of skin allergies or a history of extreme sensitivity to cosmetics or lotions
• Fragile skin vulnerable to skin tears.
• Damaged epigastric skin (open wounds, rash, inflammation)
• Subjects who are unable to remain in a relaxed reclined position for the test duration
• Subject has received an investigational drug or used an investigational medical device within 30 days prior to randomization, or is currently enrolled in an investigational study.
• The use of following drugs 1 month prior to inclusion and during the whole study duration: laxatives, opioids, anti-acids, anticholinergics/antispasmodics, anticonvulsants, antidepressants, diuretics, antihypertensives, antipsychotics, calcium channel blockers, bile acid sequestrants, iron supplements, anticoagulants, HIV protease inhibitors (saquinavir, lopinavir), atorvastatine, negazodone, efavirenz, Sint-janskruid (CYP3A4 inducers)

Trial design

Primary purpose: Other

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: Double Blind

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15 participants in 3 patient groups

Fructose

Other group

Description:

A solution of 10 g fructose in 200 mL of tap water will be infused once over a period of 20min. during 1 of the 3 investigation days.

Treatment:

Dietary Supplement: Fermentable Oligo-, Di- Monosaccharides And Polyols (FODMAPs)

Fructan

Other group

Description:

A solution of 30 g fructan in 200 mL of tap water will be infused once over a period of 20min. during 1 of the 3 investigation days.

Treatment:

Dietary Supplement: Fermentable Oligo-, Di- Monosaccharides And Polyols (FODMAPs)

Mannitol

Other group

Description:

A solution of 10 g mannitol in 200 mL of tap water will be infused once over a period of 20min. during 1 of the 3 investigation days.

Treatment:

Dietary Supplement: Fermentable Oligo-, Di- Monosaccharides And Polyols (FODMAPs)