Can Intermittent Fasting Induce Weight Loss and Improve Gut Health as Compared to Standard Medical Care in Patients With Obesity/High BMI and Crohn's Disease. (CD-Fast)
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|ClinicalTrials.gov Identifier: NCT05230160|
Recruitment Status : Not yet recruiting
First Posted : February 8, 2022
Last Update Posted : February 8, 2022
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Diet is a determinant of gut microbial diversity and composition and is recognized as a potential environmental trigger for IBD; for example, high-fat diets are associated with increased risk of CD in pre-clinical models, with effects mediated through dysbiosis and altered gut permeability.
Diet is also a potential non-pharmacological therapy for weight loss and for reducing the occurrence of disease flares and the reliance on dose escalation of biologic agents. Indeed, there is accumulating evidence for the role of diet in the treatment of CD, and diet-induced improvement of microbial dysbiosis is associated with induction of remission in pediatric patients with active CD.
Intermittent Fasting (IF) is a dietary intervention that involves periodic intervals of no or very limited energy intake. We want to determine the efficacy and feasibility of a 12-week IF(Intermittent Fasting) intervention to induce weight loss (by 1 BMI unit reduction), decrease biomarker inflammation and increase microbial functional diversity compared to standard medical management (SM) in a pilot study of individuals with overweight or obesity and CD in clinical remission with elevated biomarkers of inflammation, indicated by fecal calprotectin (FCP) > 250 µg/g or C-reactive protein (CRP) > 5 mg/L).
|Condition or disease||Intervention/treatment||Phase|
|Crohn Disease||Other: Intermittent Fasting||Not Applicable|
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||42 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||None (Open Label)|
|Official Title:||Can Intermittent Fasting Induce Weight Loss and Improve Gut Health as Compared to Standard Medical Care in Patients With Obesity/High BMI and Crohn's Disease.|
|Estimated Study Start Date :||March 1, 2022|
|Estimated Primary Completion Date :||December 20, 2024|
|Estimated Study Completion Date :||June 30, 2025|
Experimental: Intervention Group
The IF group will fast for 16 consecutive hours on 6 days per week with an 8-hour eating window (e.g., eat from 10 a.m. to 6 p.m.). The IF group will consume their habitual diet in terms of food choices and energy intake, but only during the 8-hour and full-day non-fasting periods. An RD will meet virtually with participants in the IF group at baseline to teach them the fasting protocol and how to manage energy intake and hunger, as well as to reinforce the requirement to not change habitual dietary practices. The research coordinator will call patients every two weeks to assess for changes in medications, compliance with the fasting protocol, and symptoms (assessed monthly) using the modified HBI.
Other: Intermittent Fasting
Intermittent Fasting (IF) is a dietary intervention that involves periodic intervals of no or very limited energy intake. Fasting and feeding intervals vary and the practice of IF commonly consists of either a daily fast for 16 hours, a 24-hour fast on alternate days, or a fast two days per week on non-consecutive days.
For the study, the IF group will be asked to fast for 16 consecutive hours, 6 days per week. This means they will have an 8-hour eating window (e.g., eat from 10 a.m. to 6 p.m.) each day. They will be asked to eat the same types of food and the same amounts as usual, but only during the 8-hour eating window.
No Intervention: Standard Medical Care Group
The control group will continue with their habitual dietary pattern. The research coordinator will call patients at baseline and every two weeks to assess for changes in medications and symptoms (assessed monthly) using the modified HBI.
- BMI-A decrease in BMI of at least 1 BMI unit over the course of the intervention: Change is being assessed [ Time Frame: Baseline and Week 12 ]A measure of body fat based on height and weight
- Fecal Calprotectin: Change is being assessed [ Time Frame: Baseline and Week 12 ]FCP is a test used to detect inflammation in the colon and is associated with disease
- C Reactive Protien: Change is being assessed [ Time Frame: Baseline and Week 12 ]A protein the liver produces in the presence of inflammatory disease
- 24 hour ASA food recalls: Change is being assessed. [ Time Frame: Baseline and week 12 ]Assess diet quality
- Serum and fecal metabolomics: Change is being assessed [ Time Frame: Baseline and Week 12 ]Metabolomics analysis provides a snapshot of an organism's current metabolite profile
- Serum markers: Change is being assessed [ Time Frame: Baseline and week 12 ]Leptin, adiponectin, IL-6, irisin, zonulin, ghrehlin, GLP-1, and GLP-2
- Body Composition: Change is being assessed [ Time Frame: Baseline and week 12 ]Lean muscle mass, total fat mass, subcutaneous fat mass, and visceral fat mass will be assessed using DEXA, a gold standard test to determine body composition, differentiate proportion of lean muscle compared to fat mass, and distinguish between subcutaneous and VAT
- Fecal microbiome: Change is being assessed [ Time Frame: Baseline and Week 12 ]Determined using shotgun metagenomic sequencing (Illumina NovaSeq 6000 platform at the UoC Centre for Health Genomics and Informatics) to provide in-depth coverage of the microbial metagenome. Sequences will be analyzed for species level abundances, beta diversity metrics, and functional capacity based on gene content.
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|Ages Eligible for Study:||18 Years to 75 Years (Adult, Older Adult)|
|Sexes Eligible for Study:||All|
|Accepts Healthy Volunteers:||No|
- ≥ 18 to ≤ 75 years of age;
- ileocolonic or colonic CD in clinical remission diagnosed through conventional definitions with a Harvey Bradshaw Index (HBI) < 5 within 3 months of recruitment;
- presence of inflammation using an FCP ≥ 250 µg/g or a CRP ≥ 5 mg/L;
- stable dosing of biologic agents and/or immunomodulators and/or oral or rectal 5-ASA, and no changes to medical management (including corticosteroid exposure) for at least 3 months prior to recruitment
- presence of overweight or obesity with BMI > 25 and a PG-SGA of class A.
- upper gastrointestinal involvement CD, fistulizing disease;
- documented strictures based on sonographic findings or colonoscopy within the last year;
- > 1 small bowel resection;
- presence of an ostomy;
- antibiotic use in past 3-months;
- corticosteroids in the last 3 months.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT05230160
|Contact: Maitreyi Raman, MDemail@example.com|
|Contact: Lorian Taylor, PhD, RDfirstname.lastname@example.org|
|TRW building, Foothills, University of Calgary|
|Calgary, Alberta, Canada, T2N 4Z6|
|Principal Investigator:||Maitreyi Raman, MD||University of Calgary|
|Responsible Party:||Maitreyi Raman, Principal Investigator, University of Calgary|
|Other Study ID Numbers:||
|First Posted:||February 8, 2022 Key Record Dates|
|Last Update Posted:||February 8, 2022|
|Last Verified:||January 2022|
|Individual Participant Data (IPD) Sharing Statement:|
|Plan to Share IPD:||No|
|Plan Description:||No There is no plan to make individual participant data available to other researchers outside of the study team.|
|Studies a U.S. FDA-regulated Drug Product:||No|
|Studies a U.S. FDA-regulated Device Product:||No|
Body Weight Changes
Inflammatory Bowel Diseases
Digestive System Diseases