- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT06107192
Gut Microbial Metabolites of Apple Polyphenols (GutMMAP)
December 20, 2023 updated by: University of Maryland, College Park
Gut Microbial Metabolites Of Apple Polyphenols: Interrogating Individual Differences To Establish Functional Biomarker Utility
The goal of this controlled feeding trial is to learn about the metabolism of polyphenols, a common class of compounds found in plant-based foods, by the gut microbiome.
It will evaluate how differences in gut bacteria across individuals influence metabolism of polyphenols from foods, which may influence health benefits that people receive from different foods.
Study Overview
Status
Recruiting
Conditions
Intervention / Treatment
Detailed Description
This is a randomized, cross-over controlled feeding trial.
Thirty healthy adult volunteers will be selected to participate on the basis of urinary screening results measuring a gut bacterial metabolite that is produced following consumption of a soy food: 15 O-desmethylangolensin (ODMA) producers and 15 age and gender-matched ODMA non-producers will be included.
Participants will be assigned to consume two diets in random order: an apple catechin diet that provides a controlled amount of catechins in apple juice, and a nutritionally-matched low catechin diet.
Both diet phases will last 3 days, with a 10 day washout period in between the two diet phases.
Study Type
Interventional
Enrollment (Estimated)
30
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Contact
- Name: Margaret Slavin, PhD
- Phone Number: 301-405-4533
- Email: mms@umd.edu
Study Locations
-
-
Maryland
-
College Park, Maryland, United States, 20742
- Recruiting
- Department of Nutrition and Food Science
-
Contact:
- Margaret Slavin, PhD
- Phone Number: 301-405-4533
- Email: mms@umd.edu
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
- Adult
Accepts Healthy Volunteers
Yes
Description
Inclusion Criteria:
- Completion of informed consent.
- Stated willingness to comply with all study procedures and availability for the duration of the study.
- Any gender identification, aged 18 - 45.
- BMI 18.5 - 40 kg/m^2
- Ability to consume the intervention foods and beverages and be willing to adhere to the dietary regimen.
- Agreement to provide urine and fecal samples according to the study protocol.
- Agreement to adhere to avoid high catechin foods (tea, chocolate) for 4 weeks.
- Able to come to the study location for 8 visits according to the study schedule.
- As assessed through an initial urine screening phase, a person is eligible either on the basis of (1) the presence of a urinary marker for soy isoflavone metabolism (ODMA), or (2) as a control matched for age and gender.
Exclusion Criteria:
- Current, regular use of antacids or acid reducers.
- Systemic antibiotic use within the past month prior to the urinary screening until completion of the dietary intervention.
- Pregnancy or lactation, within 3 months post-partum (regardless of breastfeeding) at screening or planning to become pregnant during the study duration.
- Known allergic reactions to components of the foods or beverages of the study diet (soy, wheat, dairy, peanut, tree nuts, apples, eggs) or any history of anaphylactic food allergy.
- Current diagnosis of renal, hepatic, or gastrointestinal conditions.
- History of stroke.
- Underweight (BMI <18.5 kg/m^2) or severe obesity (BMI >40 kg/m^2).
- Under 18 years or above 45 years of age.
- Unwilling or unable to participate in the controlled dietary intervention or provide urine or fecal samples.
- Has a pacemaker, implanted defibrillator, or other implanted electronic device.
- Change of body weight >10% between screening and dietary intervention.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Apple catechin
A 3-day controlled diet
|
The intervention will provide a catechin-containing apple juice, for consumption alongside a low catechin diet tailored to participants calorie needs for weight maintenance.
|
Placebo Comparator: Low catechin
A 3-day controlled diet
|
The intervention will provide a nutritionally-matched beverage without catechins, for consumption alongside a low catechin diet tailored to participants calorie needs for weight maintenance.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Mean sum catechin metabolites
Time Frame: Post 3-day intervention vs. post 3-day control
|
Mean difference in sum catechin metabolite concentration in response to the intervention, stratified by ODMA producers and non-producers.
|
Post 3-day intervention vs. post 3-day control
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Mean individual catechin metabolites
Time Frame: Post 3-day intervention vs. post 3-day control
|
Mean differences in individual valerolactone and valeric acid concentrations in response to the intervention, stratified by ODMA producers and non-producers.
|
Post 3-day intervention vs. post 3-day control
|
Differences in microbiome profiles
Time Frame: Post 3-day intervention vs. post 3-day control
|
Differences in microbiome profiles in response to the 3-day intervention.
|
Post 3-day intervention vs. post 3-day control
|
Difference in microbiome diversity
Time Frame: Post 3-day intervention vs. post 3-day control
|
Differences in microbiome diversity in response to the 3-day intervention.
|
Post 3-day intervention vs. post 3-day control
|
Difference in microbial species abundance
Time Frame: Post 3-day intervention vs. post 3-day control
|
Differences in microbial species abundance in response to the 3-day intervention.
|
Post 3-day intervention vs. post 3-day control
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Investigators
- Principal Investigator: Margaret Slavin, PhD, University of Maryland, College Park
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Estimated)
January 1, 2024
Primary Completion (Estimated)
June 1, 2025
Study Completion (Estimated)
June 1, 2025
Study Registration Dates
First Submitted
October 24, 2023
First Submitted That Met QC Criteria
October 24, 2023
First Posted (Actual)
October 30, 2023
Study Record Updates
Last Update Posted (Estimated)
December 21, 2023
Last Update Submitted That Met QC Criteria
December 20, 2023
Last Verified
December 1, 2023
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- 2023-05787
- 2022-67017-41032 (Other Grant/Funding Number: U.S. Department of Agriculture)
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
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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