- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03924778
Modifying Diet to Improve Gut Microbiome
June 20, 2023 updated by: H. Lee Moffitt Cancer Center and Research Institute
Modifying Diet and the Gut Microbiota to Reduce Obesity and Health Disparities
The investigators will conduct a 2-arm randomized controlled pilot, feasibility feeding study in which 28 participants will be randomized to receive either a calorie-restricted Dietary Approaches to Stop Hypertension (DASH) diet or a calorie-restricted standard American diet provided by the study for 4 weeks.
Participants will be non-Hispanic black or white, generally healthy females (14 black, 14 white).
The investigators will collect fecal samples at multiple time points before, during, and after the dietary intervention to analyze for changes in the gut microbiota and functional-level metabolic products.
This work will be led by an interdisciplinary team including expertise in bio-behavioral science, microbiology, nutrition science, bioinformatics, and biostatistics all with cross-cutting expertise in health disparities, prevention research, nutrition, the gut microbiota, inflammation and other biomarkers.
The rationale for the proposed research is that once the interactions between race, diet, and the gut microbiota are more fully understood, targeted diet modifications may provide new and innovative approaches for the prevention and treatment of obesity and obesity-related diseases.
Study Overview
Status
Not yet recruiting
Conditions
Intervention / Treatment
Study Type
Interventional
Enrollment (Estimated)
28
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: Tiffany L Carson, PhD
- Phone Number: 813-745-4944
- Email: Tiffany.Carson@moffitt.org
Study Locations
-
-
Florida
-
Tampa, Florida, United States, 33612
- Moffit Cancer Center
-
Principal Investigator:
- Tiffany Carson, PhD
-
Contact:
- Tiffany Carson, PhD
- Phone Number: 813-745-4944
- Email: Tiffany.Carson@moffitt.org
-
-
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
18 years and older (Adult, Older Adult)
Accepts Healthy Volunteers
Yes
Description
Inclusion Criteria:
- female
- non-Hispanic, black or white
- age 19-65 years
- BMI >= 30 kg/m^2
- able to visit Bionutrition Unit daily
Exclusion Criteria:
- gastrointestinal (GI) conditions i.e., irritable bowel, diverticulitis, peptic ulcers, Crohn's, GI cancers, and adenatomous polyps
- antibiotic or probiotic use in the previous 90 days
- tobacco use
- heavy alcohol consumption
- major medical conditions (e.g., renal disease, diabetes, cancer)
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: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: DASH diet
calorie-restricted DASH diet (25% fat; 57% carbohydrate; 18% protein; 34 g fiber
|
brief description
|
Active Comparator: standard American diet
calorie-restricted standard American diet (35% fat; 51% carbohydrate; %15 protein; 14 g fiber
|
describe
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Mean Weight Change of Participants
Time Frame: Baseline to day 28
|
Weight change as measured by a scale in kilograms at multiple time points will be calculated and averaged.
|
Baseline to day 28
|
Mean Weight Change of Participants
Time Frame: Day 28 to Day 42
|
Weight change as measured by a scale in kilograms at multiple time points will be calculated and averaged.
|
Day 28 to Day 42
|
Mean Weight Change of Participants
Time Frame: Baseline to day 42
|
Weight change as measured by a scale in kilograms at multiple time points will be calculated and averaged.
|
Baseline to day 42
|
Diet-specific changes in secondary bile acid
Time Frame: Baseline to day 28
|
The investigators will calculate changes in cholic acid in milligrams.
|
Baseline to day 28
|
Diet-specific changes in secondary bile acid
Time Frame: day 28 to day 42
|
The investigators will calculate changes in cholic acid in milligrams.
|
day 28 to day 42
|
Diet-specific changes in secondary bile acid
Time Frame: baseline to day 42
|
The investigators will calculate changes in cholic acid in milligrams.
|
baseline to day 42
|
Diet-specific changes in inflammatory marker
Time Frame: baseline to day 28
|
The investigators will calculate changes in c-reactive protein in mg/L.
|
baseline to day 28
|
Diet-specific changes in inflammatory marker
Time Frame: day 28 to day 42
|
The investigators will calculate changes in c-reactive protein in mg/L.
|
day 28 to day 42
|
Diet-specific changes in inflammatory marker
Time Frame: baseline to day 42
|
The investigators will calculate changes in c-reactive protein in mg/L.
|
baseline to day 42
|
Diet-specific changes in short chain fatty acids
Time Frame: baseline to day 28
|
The investigators will calculate changes in acetic acid in mmol/L
|
baseline to day 28
|
Diet-specific changes in short chain fatty acids
Time Frame: day 28 to day 42
|
The investigators will calculate changes in acetic acid in mmol/L
|
day 28 to day 42
|
Diet-specific changes in short chain fatty acids
Time Frame: baseline to day 42
|
The investigators will calculate changes in acetic acid in mmol/L
|
baseline to day 42
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Investigators
- Principal Investigator: Tiffany L Carson, PhD, Moffitt Cancer Center
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)
June 1, 2024
Primary Completion (Estimated)
June 1, 2025
Study Completion (Estimated)
June 1, 2025
Study Registration Dates
First Submitted
March 25, 2019
First Submitted That Met QC Criteria
April 19, 2019
First Posted (Actual)
April 23, 2019
Study Record Updates
Last Update Posted (Actual)
June 22, 2023
Last Update Submitted That Met QC Criteria
June 20, 2023
Last Verified
June 1, 2023
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- IRB-300003207
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
NO
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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