- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04144426
Meal Schedule Effects on Circadian Energy Balance in Adults
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Although there have been a large number of studies in humans on the effects of food intake at night, very few studies directly address the hypothesis that inappropriately phased eating or snacking (i.e., at night) in humans disrupts metabolism and respiratory quotient (RQ) patterns and there are no studies that we are aware of that directly measure circadian clock phase relative to timing of food intake while evaluating metabolism. This may be critical, because it is well established that the timing of food intake can also modulate circadian clock phase.
Hypothesis: Food consumption in the subjective night (e.g., 20:00 - 02:00) will result in a different circadian metabolic profile measured by RQ) than food consumed in the subjective day.
Aim 1: To determine if there are daily rhythms of switching between lipid and carbohydrate metabolism in humans that are altered by the timing of food intake. Aim 2: To determine if timing of food intake results in "internal desynchronization" between the metabolic rhythms (RQ) and the rhythm in core body temperature (a marker of central circadian phase).
Aim 3: To determine if body composition has measurable impact on the circadian regulation of metabolism.
In this study we will test human subjects in a specially designed whole-room indirect calorimeter where energy expenditure and RQ will be monitored by indirect calorimetry continuously over 56 hours. Circadian phase and amplitude will be assessed by continuously recording the core body temperature rhythm using the Vital Sense Integrated Physiological Monitoring System in which subjects swallow a telemetry capsule that transmits core body temperature to a data acquisition module. In consultation with a nutritionist at Vanderbilt, we will use a cross-over design in which daily diets have the same caloric and nutritional value but in which the subjects consume the calories that would normally be breakfast as snacks consumed in the late-evening.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
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Tennessee
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Nashville, Tennessee, United States, 37212
- Vanderbilt University Medical Center
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Be able to understand the study, provide written informed consent (in English), and be able to fill out the questionnaire
- Be male or female older than 18 years of age;
- Have a normal BMI (20-25) or be obese (BMI more than 30);
- Have a normal basal glucose level (70-100 mg/dL)
- If female of childbearing potential, have a negative pregnancy test on study day;
Exclusion Criteria:
- Be pregnant or lactating;
- Have known sleep, metabolic (e.g., diabetes), or gastro-intestinal disorders except obesity;
- Had alcohol less than 24 hours before admission;
- Require assistance with activities of daily living;
- Have difficulty swallowing
- Be unable to complete a food and sleep diary
- Be smokers
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Normal diet then modified diet
Participates in the normal diet will receive 3 meals each day, breakfast at 8:00 AM,lunch at 12:30 PM and dinner at 5:45 PM.
Participates in the modified diet skipped breakfast, had lunch at 12:30 PM, dinner at 5:45 PM, and a breakfast equivalent snack at 10:00 PM.
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Participants will receive either a 2000 calorie or a 2500 calorie diet at normal meal times
Participants will receive either a 2000 calorie or a 2500 calorie diet with a single meal shift, breakfast is moved to an hour before bedtime.
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Experimental: Modified diet then normal diet.
Participates in the modified diet skipped breakfast, had lunch at 12:30 PM, dinner at 5:45 PM, and a breakfast equivalent snack at 10:00 PM.Participates in the normal diet will receive 3 meals each day, breakfast at 8:00 AM,lunch at 12:30 PM and dinner at 5:45 PM.
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Participants will receive either a 2000 calorie or a 2500 calorie diet at normal meal times
Participants will receive either a 2000 calorie or a 2500 calorie diet with a single meal shift, breakfast is moved to an hour before bedtime.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Oxygen intake
Time Frame: 56 hours
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Subjects were housed in a whole room calorimeter and oxygen consumption was monitored minute by minute
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56 hours
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Carbon dioxide exhaled
Time Frame: 56 hours
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Subjects were housed in a whole room calorimeter and carbon dioxide was monitored minute by minute
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56 hours
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Core body temperature
Time Frame: 56 hours
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The subjects' circadian phase and amplitude will be assessed by continuously recording the core body temperature rhythm with an ingestible Vital Sense monitor.
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56 hours
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Locomotor activity
Time Frame: 56 hours
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The subject's activity will be assessed throughout the experiment using a Actigraph (GT3X) triaxial monitor attached to the subject's wrist, waist, and ankle.
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56 hours
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Determination of Body Mass Index (BMI)
Time Frame: Baseline just prior to entry in the metabolic chamber
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A dual-energy X-ray absorptiometry (DXA) scan will be performed to assess subject's percentage body fat after check-in and before the first night in the metabolic chamber.
Fat content will be used to accurately determine the subject's Body Mass Index.
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Baseline just prior to entry in the metabolic chamber
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Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Terry L Page, PhD, Vanderbilt University
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- 140536
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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