Prospective, Randomised Study: Metabolic and Functional Effects of Bariatric Surgery Accessed Using PET and MRI
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Morbid Obesity
- Sponsor
- Turku University Hospital
- Enrollment
- 50
- Locations
- 1
- Primary Endpoint
- Tissue metabolism among morbidly obese persons assessed using PET, MRI and fMRI
- Status
- Completed
- Last Updated
- 9 years ago
Overview
Brief Summary
The objectives of this study are to measure effect of obesity on brain structure and molecular pathways, food-stimuli mediated brain activation response, on hormones affecting both feeding and energy balance as well as on bone metabolism and bone marrow fat. In the first phase the studies are performed at baseline before bariatric surgery and in the second phase post-operatively after 6 months. Regional free fatty acid uptake are studied with PET and 14(R, S)-[18F]-fluoro-6-thia-heptadecanoic acid ([18F]FTHA). Changes in body fat distribution are investigated with magnetic resonance imaging (MRI) Brain reward system response to food stimuli is assessed using functional MRI (fMRI) and white and grey matter volumes using diffusion tensor imaging (DTI). Brain neurotransmitter system will be measured with [11C]raclopride and [11C]carfentanil and PET. In the second part of the study the same variables are studied after bariatric surgery: either laparoscopic sleeve gastrectomy or Roux-en-Y gastric bypass.
Detailed Description
Regional free fatty acid uptake in myocardium, skeletal muscle, subcutaneous fat, visceral fat, pancreas, liver, brain, intestine and the bone are studied with PET and 14(R, S)-\[18F\]-fluoro-6-thia-heptadecanoic acid (\[18F\]FTHA). Changes in body fat distribution are investigated with magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS). Brain reward system response to food stimuli is assessed using functional MRI (fMRI) and white and grey matter volumes using diffusion tensor imaging (DTI). The study consists totally of 60 study subjects. Of these 40 are morbidly obese adults, BMI
Investigators
Pirjo Nuutila
professor, cheif physician
Turku University Hospital
Eligibility Criteria
Inclusion Criteria
- •BMI \> 40 kg/m2 or
Exclusion Criteria
- Not provided
Outcomes
Primary Outcomes
Tissue metabolism among morbidly obese persons assessed using PET, MRI and fMRI
Time Frame: Imaging studies will be performed before the bariatric surgery (day 1) and 6 months after. Healthy volunteers will be studied only once.