Healthy
Conditions
Keywords
Neurotensin, Human, Physiology of neurotensin, fat perfusion, healthy subjects
Brief summary
Context: Cholecystokinin (CCK) and neurotensin are stimulated during meal intake by the presence of fat in the small intestine. The sequence of events suggests that fat hydrolysis is crucial for triggering the release. Objectives: The aim of this study was therefore to investigate whether CCK mediated the effect of intraduodenal (ID) fat on neurotensin secretion via CCK-1 receptors.
Detailed description
Setting: Single center study; 34 male volunteers were studied in consecutive, randomized, double blind, crossover studies. Subjects and Methods: CCK and neurotensin release were quantified in: 1) 12 subjects receiving an ID fat infusion with or without 60 mg orlistat, an irreversible inhibitor of gastrointestinal lipases, in comparison to vehicle. 2) 12 subjects receiving ID long chain fatty acids (LCF), ID medium chain fatty acids (MCF) or ID vehicle. 3) 10 subjects receiving ID LCF with and without the CCK-1 receptor antagonist dexloxiglumide (DEXLOX) or ID vehicle plus IV saline (placebo). Hormone concentrations were measured by specific RIA systems.
Interventions
DIETARY_SUPPLEMENTFat perfusion to the small intestine
1. Triglycerides, long chain fatty acids, medium chain fatty acids perfused to the small intestine 2. Orlistat perfused to the small intestine 3. DEXLOX as CCK-1 receptor antagonist
Sponsors
University Hospital, Basel, Switzerland
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
BASIC_SCIENCE
Masking
SINGLE (Subject)
Eligibility
Sex/Gender
MALE
Age
18 Years to 35 Years
Healthy volunteers
Yes
Inclusion criteria
* Healthy male subjects
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Neurotensin plasma concentrations | Change in plasma cocnentrations over 2-3 hours |
Countries
Switzerland
Outcome results
None listed