Obesity Clinical Trial
Official title:
A Mechanistic Examination of Dietary Composition on Metabolic Fuels Availability
Verified date | July 2017 |
Source | Boston Children’s Hospital |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Interventional |
This study will evaluate a potential physiologic mechanism underlying the effects of dietary composition on control of body weight
Status | Completed |
Enrollment | 30 |
Est. completion date | May 2017 |
Est. primary completion date | May 2016 |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | All |
Age group | 18 Years to 65 Years |
Eligibility |
Inclusion Criteria: Inclusion Criteria (as detailed in Framingham State Food Study, NCT02068885) - Aged 18 to 65 years - BMI = 25 kg/m2 - BMI < 40 kg/m2 and weight = 300 lbs (136 kg) - Medical clearance from a primary care provider - Student or employee at Framingham State University throughout enrollment in the study - Willing and able to eat and drink only the foods and beverages on the study menus - Willing to eat in the dining hall - Willing to abstain from consuming alcohol during participation Additional Inclusion Criteria: • Willing to undergo additional procedures in this ancillary study Exclusion Criteria: Exclusion Criteria (as detailed in Framingham State Food Study, NCT02068885) - Change in body weight exceeding ±10% during prior year - Recent adherence to a special diet - Recent adherence to a vigorous physical activity regimen (e.g., participation in a varsity sport) - Chronic use of any medication or dietary supplement that could affect study outcomes - Current smoking (1 cigarette in the last week) - Heavy baseline alcohol consumption or history of binge drinking - Physician diagnosis of a major medical/psychiatric illness or eating disorder - Abnormal blood glucose, TSH, CBC, BUN, Creatinine - ALT greater than 150% of the normal upper limit - Plans for a vacation during the study that would preclude adherence to prescribed diet - Additional exclusions for female participants: Irregular menstrual cycles; any change in birth control medication during the 3 months prior to enrollment; pregnancy or lactation during the 12 months prior to enrollment Additional Exclusion Criteria: - Allergy or prior reaction to Lidocaine - Medical condition or medication that would increase risk of bleeding, infection or skin reactions |
Country | Name | City | State |
---|---|---|---|
United States | Boston Children's Hospital | Boston | Massachusetts |
United States | Boston Medical Center | Boston | Massachusetts |
United States | Brigham & Women's Hospital | Boston | Massachusetts |
United States | Framingham State University | Framingham | Massachusetts |
Lead Sponsor | Collaborator |
---|---|
Boston Children’s Hospital | Boston Medical Center, Brigham and Women's Hospital, Framingham State University, New Balance Foundation, Nutrition Science Initiative |
United States,
Ebbeling CB, Swain JF, Feldman HA, Wong WW, Hachey DL, Garcia-Lago E, Ludwig DS. Effects of dietary composition on energy expenditure during weight-loss maintenance. JAMA. 2012 Jun 27;307(24):2627-34. doi: 10.1001/jama.2012.6607. — View Citation
Walsh CO, Ebbeling CB, Swain JF, Markowitz RL, Feldman HA, Ludwig DS. Effects of diet composition on postprandial energy availability during weight loss maintenance. PLoS One. 2013;8(3):e58172. doi: 10.1371/journal.pone.0058172. Epub 2013 Mar 6. — View Citation
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Other | Effect modification by insulin secretion | We will test for an interaction by insulin secretion (as measured by plasma insulin 30 minutes into a standard oral glucose tolerance test) of the relationship between diet and metabolic fuels concentration. | 10 - 15 weeks after initiation of test diets | |
Other | Adipocyte studies of anabolic status | Adipose tissue gene expression studies (assessed by mRNA levels of selected candidate genes involved in lipid storage, fatty acid and lipid biosynthesis, angiogenesis, inflammation). Change from baseline. | 10 - 15 weeks after initiation of test diets | |
Other | Adipose tissue histology | Change from baseline. | 10 - 15 weeks after initiation of test diets | |
Primary | Late postprandial energy availability | Post-prandial energy availability calculated as the sum, in kcal/L, of energy from circulating metabolic fuels (glucose, non-esterified fatty acids, lactate and ketoacids), as measured during a 24 hr inpatient admission. Time of interest includes 2.5 - 5 hr in the postprandial period after breakfast, lunch and dinner. | 10 - 15 weeks after initiation of test diets | |
Secondary | Late postprandial energy availability, with lactate excluded | Post-prandial energy availability calculated as the sum, in kcal/L, of energy from circulating metabolic fuels (glucose, non-esterified fatty acids, and ketoacids), as measured during a 24 hr inpatient admission. Time of interest includes 2.5 - 5 hr in the postprandial period after breakfast, lunch and dinner. (Lactate is metabolized primarily by the liver, which uses this substrate to produce glucose. Thus, including lactate in the calculation of metabolic fuels may comprise "double counting" -- and not accurately reflect actual fuel availability to body tissues) | 10 - 15 weeks after initiation of test diets | |
Secondary | Fasting energy availability | Fasting energy availability calculated as the sum, in kcal/L, of energy from circulating metabolic fuels (glucose, non-esterified fatty acids, lactate and ketoacids), as measured during a 24 hr inpatient admission. | 10 - 15 weeks after initiation of test diet | |
Secondary | Total energy availability | Total energy availability calculated as the sum, in kcal/L, of energy from circulating metabolic fuels (glucose, non-esterified fatty acids, lactate and ketoacids), as measured during a 24 hr inpatient admission. | 10 - 15 weeks after initiation of test diets | |
Secondary | Hunger | Measured during a 24 hr inpatient admission. | 10 - 15 weeks after initiation of test diets | |
Secondary | Satiety | Measured during a 24 hr inpatient admission. | 10 - 15 weeks after initiation of test diets | |
Secondary | Glucose | Concentration during 24-hr inpatient admission | 10 - 15 weeks after initiation of test diets | |
Secondary | Non-esterified fatty acids | Concentration during 24-hr inpatient admission | 10 - 15 weeks after initiation after test diet | |
Secondary | Lactate | Concentration during 24-hr inpatient admission | 10 - 15 weeks after initiation of test diets | |
Secondary | Ketoacids | Concentration during 24-hr inpatient admission | 10 - 15 weeks after initiation of test diets | |
Secondary | Insulin | Concentration during 24-hr inpatient admission | 10 - 15 weeks after initiation of test diets |
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