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Completed

NCT Number: NCT01373892

Prospective, Randomised Study: Metabolic and Functional Effects of Bariatric Surgery Accessed Using PET and MRI.

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.

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Key information

Conditions

Morbid Obesity Body Weight Nutrition Disorders Nutritional and Metabolic Diseases Obesity Obesity, Morbid Overnutrition Overweight Pathological Conditions, Signs and Symptoms Signs and Symptoms

Age range

18 year–60 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Turku PET Centre

Turku, 20520, Finland

About this study

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

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • 1) BMI > 40 kg/m2 or

Treatment and study plan

bariatric surgery

Procedure

Primary outcomes

  1. 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.

Sponsors and collaborators

Lead sponsor

Turku University Hospital

Other Gov

Registry information

Official study title

Prospective, Randomised Study: Metabolic and Functional Effects of Bariatric Surgery Accessed Using PET and MRI

Acronym: Sleevepet2

Important dates

Study start
2011
Primary completion
2013
Study completion
2016
First posted
Jun 15, 2011
Registry last updated
Mar 7, 2017

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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