The Effects of Dietary Intervention on Gastrointestinal Function in

Status Completed

Clinical Trial Summary

Diseases characterized by abnormal low and high body weight are common in the community and are associated with significant morbidity, mortality and health care related costs.

Genetic, dietary, social and psychologic factors all play an important part in these conditions; however the central role of gastrointestinal (GI) function and the control of nutrient delivery to the small bowel has not been well described in health or disease.

We propose that the GI response to feeding varies inversely with body weight. This hypothesis predicts that as body weight increases, the response to a given meal decreases in terms of motility, neurohormonal feedback, sensation and satiety. This provides an attractive explanation for why thin individuals stop eating after a small amount of food (i.e. limited gastric relaxation, rapid gastric emptying, powerful nutrient feedback with early satiety)and, conversely, why obese patients continue to eat even after nutritional requirements have been met (i.e. large gastric relaxation, slow gastric emptying, weak nutrient feedback with delayed satiety).

This project will apply MRI and Breath Tests to assess GI motility, hormonal feedback, visceral sensation and satiety in patients with pathologically low (anorexia nervosa) and high (morbid obesity) body weight and in healthy, normal weight controls.

Participants will include: Group A: normal weight, healthy volunteers (n=24: BMI: 18.5-24.9 kg/m2) Group B: patients with anorexia nervosa (DSMIV criteria and BMI: <16 kg/m2) B1: anorexia restricting type (n=12-20 over 2 years) and B2: anorexia bulimia type (n=20 over 2 years) Group C: patients with morbid obesity (BMI: 30-40 kg/m2) C1: obese (n=20 over 2 years) and C2: obese with DM type II (n=20 over 2 years).

Two studies will be performed

1. Cross-sectional study: The effects of a test meal on GI motility, hormonal feedback, visceral sensation and satiety in healthy controls and in patients with anorexia and obesity

2. Longitudinal study: The effects of dietary treatment (i.e. weight change) on GI motility, hormonal feedback, visceral sensation and satiety in patients with anorexia and obesity

Clinical Trial Description

n/a

Study Design

Allocation: Non-Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT00946816
Study type	Interventional
Source	University of Zurich
Contact
Status	Completed
Phase	N/A
Start date	September 2010
Completion date	November 2012

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

The Effects of Dietary Intervention on Gastrointestinal Function in Patients With Anorexia Nervosa and Obesity

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms