- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04989478
Postprandial Metabolism in Healthy Young Subjects (PoMet)
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Throughout the day, humans switch back and forth between the fed, postprandial (after a meal), and the postabsorptive (fasting) metabolic state. This is followed by a shift in fuel utilization from primarily using glucose to predominantly rely on β-oxidation of fatty acids. Consequently, circulating concentrations of biomarkers may fluctuate in response to this changing metabolic state. Much is known about the hormonal and metabolic effects of fasting, including lower insulin secretion, increased release of free fatty acids from adipose tissue, increased ketogenesis, glycogen breakdown, and activated gluconeogenesis. However, less is known about the effect on other biochemical markers in the postabsorptive period.
When evaluating nutritional biomarkers, both in clinical practice and in research, it is common practice to distinguish between fasting or non-fasting blood samples, based on time since the last meal. The extent to which different biomarkers are influenced by fasting status vary, and accordingly, several diagnostic cutoffs, e.g. plasma glucose for diabetes diagnosis, vary according to whether the sample was fasting or not. However, as the adaptation to fasting is a gradual process, it is expected that any changes in biomarker concentrations are also gradual. Further, as circulating metabolite concentrations are determined as a result of input (intestinal absorption and release from tissues), metabolism, and removal (utilization, storage, and excretion), we cannot reasonably assume that these changes are linear.
A few previous studies have aimed at describing the dynamics of fasting metabolism, demonstrating that the circulating metabolome changes during prolonged fasting in a dynamic manner. However, as data collection started after an overnight fast period, these studies do not provide data on the initial postprandial period and the adaptation to the fasting state. This study will extend the knowledge on the dynamics of human postprandial metabolism, by monitoring circulating concentrations of biomarkers during the 24 hours after a standardized breakfast meal. The investigators aim to capture the adaptation period from the fed to the fasting state and provide time-resolved data on a broad range of nutritional biomarkers.
Enrolled participants will attend the study center after an overnight fast, following a standardized evening meal consumed 12 hours before attendance. Anthropometric measurements (body weight, height, waist circumference, and body composition) will be taken in the fasting state, and a fasting blood sample will be drawn. After completing a standardized breakfast meal, the participants will remain at the study center for 12 hours, and blood will be frequently collected at specified time points. The participants will return to the study center the following morning for a final 24h fasting blood sample.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
Vestland
-
Bergen, Vestland, Norway, 5009
- Research Unit for Health Surveys, University of Bergen
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Body Mass Index between 22-27 kg/m^2
- No significant weight change (>5%) during the last 3 months before the study visit
- Female participants should use one of the following oral contraceptives: Almina, Loette, Melleva, Microgynon, Mirabella, or Oralcon
Exclusion Criteria:
- Acute or chronic disease such as diabetes, thyroid diseases, cancer, cardiovascular disease, or inflammatory bowel disease, during the last 3 years
- Celiac disease or other food allergies interfering with the standardized breakfast meal
- Use of any prescription medications
- Smoking or regular use of other nicotine-containing products
- Pregnancy or breastfeeding the last 3 months
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Other
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Metabolomics profile in serum during 24 hour fasting
Time Frame: 24 hours
|
Targeted metabolomics analyses of nutritional biomarkers related to B-vitamin status, one-carbon metabolism, and amino acids.
All metabolite concentrations (Individual data + group geometric mean) will be presented for 14 prespecified timepoints after a standardized breakfast meal (15m, 30m, 45m, 60m, 90m, 2h, 3h, 4h, 6h.
8h, 10h, 12h, and 24h).
|
24 hours
|
Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Sex differences
Time Frame: 24 hours
|
Comparison of metabolite concentrations between male and female subjects
|
24 hours
|
Fasting vs nonfasting concentrations
Time Frame: 24 hours
|
Comparison according to conventional cutoffs of fasting status (>6 and >8 hours)
|
24 hours
|
12h fasting metabolomic profile after day vs night fast
Time Frame: 0 and 12 hours
|
Compare 12h fasting concentrations after an overnight fast to 12h fasting concentrations after day fasting
|
0 and 12 hours
|
Collaborators and Investigators
Sponsor
Collaborators
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
- 236654
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
IPD Plan Description
IPD Sharing Time Frame
IPD Sharing Access Criteria
IPD Sharing Supporting Information Type
- STUDY_PROTOCOL
- SAP
- ICF
- ANALYTIC_CODE
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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