Bariatric Surgery and Weight Loss on Energy Metabolism and Insulin Sensitivity (BARIA)
|Obesity Protein-energy; Imbalance Insulin Sensitivity Gastrointestinal Complication||Procedure: Laparoscopic Roux-en-Y gastric bypass Procedure: Laparoscopic gastric banding Procedure: Laparoscopic sleeve gastrectomy Behavioral: Low Calorie Diet|
|Study Design:||Observational Model: Cohort
Time Perspective: Prospective
|Official Title:||Effect of Bariatric Surgery and Weight Loss on Energy Metabolism and Insulin Sensitivity "BARIA"|
- Daily Energy Metabolism and insulin sensitivity [ Time Frame: Enrollment, Baseline, Week 6-8 and Week 48-56 post-surgery / LCD diet ]Compare daily energy expenditure (accelerometry); body composition (EchoMRI, CT, MRS); insulin sensitivity (2-step hyperinsulinemic euglycemic clamp). Response of insulin, glucose, and gastrointestinal hormones. Changes in the stool microflora.
Biospecimen Retention: Samples Without DNA
|Study Start Date:||September 2010|
|Study Completion Date:||September 2014|
|Primary Completion Date:||September 2014 (Final data collection date for primary outcome measure)|
This group will be comprised of participants on a low calorie diet program.
Behavioral: Low Calorie Diet
Low Calorie Diet Program
Other Name: LCD
Weight Loss Surgery
This group will be comprised of participants having weight loss surgery: Roux-en-Y gastric bypass, gastric banding, or sleeve gastrectomy.
Procedure: Laparoscopic Roux-en-Y gastric bypass
Laparoscopic Roux-en-Y gastric bypass surgery
Other Name: RYGBProcedure: Laparoscopic gastric banding
Laparoscopic gastric banding surgery
Other Name: GBaProcedure: Laparoscopic sleeve gastrectomy
Laparoscopic sleeve gastrectomy surgery
Other Name: SGx
The purpose of the study is to determine the effect of three weight loss procedures compared to a low calorie diet. Three different obesity surgery methods; Roux-en-Y gastric bypass (RYGB), gastric banding (GBa), sleeve gastrectomy (SGx), and one low calorie diet program on metabolism, with regard to body fat, physical activity levels, hormone changes after eating a meal, and changes in taste preferences.
Participants having obesity surgery will receive laparoscopic (minimally invasive surgery performed by making several small incisions in the abdomen and inserting a camera called a laparoscope) an adjustable gastric band, a sleeve gastrectomy or roux en Y gastric bypass. In addition to the regular surgical procedures, the surgeons will remove laparoscopically about 10g (1 tablespoon) of fat from within the abdomen. This fat tissue will be processed and stored for future study (at completion of the study) of your metabolism pre-treatment. Participants will complete post-operative follow-up appointments with their surgeon as required.
Participants on the LCD program will experience weight loss by following a low calorie diet program (LCD). For this diet you will select all your own food choices and our dietitians will assist you to reach your daily calorie target. You will be asked to follow this balanced food diet for the remainder of the 12 month study.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00936130
|United States, Louisiana|
|Pennington Biomedial Research Center|
|Baton Rouge, Louisiana, United States, 70808|
|Principal Investigator:||Eric Ravussin, Ph.D.||Pennington Biomedical Research Center|