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Clinical Trial Details — Status: Not yet recruiting

Administrative data

NCT number NCT04774042
Other study ID # 202006016MIPB
Secondary ID
Status Not yet recruiting
Phase N/A
First received
Last updated
Start date March 2021
Est. completion date January 2023

Study information

Verified date February 2021
Source National Taiwan University Hospital
Contact Tzu-Chan Hong, M.D.
Phone 886-2-972653917
Email edisonhong77@gmail.com
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

Significant changes in gut microbiota was noted after the high-volume bowel preparation with PEG before colonoscopy. The dynamic changes were found to be short-term. However, the perturbation pattern of gut microbiota found after bowel preparation may link to metabolic syndrome and obesity. No study had investigated the supplementation of probiotic in this dynamic situation before. Here we proposed this study to fulfill the knowledge gap and also inquiry on the potential therapeutic strategy.1.To test the hypothesis of probiotic supplementation after bowel preparation alters the composition of gut microbiota in a short-term and long-term manner.2.To test the hypothesis of GI tract associated symptoms affected by probiotic supplementation after bowel preparation. 3. To test the hypothesis of clinical events, especially parameters of metabolic syndrome affected by probiotic supplementation after bowel preparation.


Description:

Objectives: Colonoscopy is widely used for identification and treatment of colon polyps and intestinal symptoms. High-volume polyethylene glycol (PEG) bowel preparation prior to colonoscopy causes significant dysbiosis of gut microbiota. Currently dysbiosis of gut microbiota is associated with metabolic syndrome and obesity. However, inconclusive conclusions were drawn from clinical trials studying supplementary probiotics and beneficial clinical effects on metabolic parameters. However, no study has addressed the effects of probiotic supplementation on the labile and dynamic intestinal environment following bowel preparation. Aims: Our study aims at studying the short-term and long-term changes on gut microbiota following the probiotic supplementation after bowel preparation. We also aim at studying the changes in abdominal symptoms and parameters of metabolic syndrome. Methods: This study is a prospective, multicentered, randomized double blind three-armed placebo-controlled trial. Targeted population will be those undergoing PEG bowel preparation before colonoscopy. Each individual will be randomly assigned to one of the active probiotic or placebo supplementation. General health parameters and anthropometric measurements, stool, serum lab data, abdominal sonography, oral carnitine/choline challenge tests will be analyzed. The follow-up timepoints are pre- and post-bowel preparation, receiving probiotics/placebo for 8 weeks, 3 months and 6 months thereafter.Outcome measurement: Primary end point: Evaluate the chronological change of gut microbiota post-bowel preparation between probiotic group and placebo group. Secondary end points:To compare incidence of GI associated symptoms after taking probiotics between two groups. Also evaluate the effects of probiotic supplementation on parameters of metabolic syndrome, evaluate the effects on fatty liver and the interaction between SNP variation and the benefit of probiotic supplementation.


Recruitment information / eligibility

Status Not yet recruiting
Enrollment 300
Est. completion date January 2023
Est. primary completion date January 2023
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 20 Years and older
Eligibility Inclusion Criteria: 1. Adults age >20 2. Undergoing colonofibroscopy (CFS) with PEG bowel preparation Exclusion Criteria: 1. Inadequate bowel preparation 2. Subjects with active cancer or IBD (inflammatory bowel disease) 3. Subjects with history of abdominal surgery (including stomach, gallbladder, pancreas, small bowel, large bowel) 4. Subjects who take medication related to gastrointestinal motility within 1 months 5. Subjects who take antibiotics or probiotics within 1 months 6. Subjects under pregnancy 7. Allergic or intolerance to the study medication 8. Refused to randomization

Study Design


Intervention

Dietary Supplement:
Infloran probiotic
Infloran
HAC probiotic
HAc probiotic
Infloran placebo
Infloran placebo
HAC placebo
HAC placebo

Locations

Country Name City State
n/a

Sponsors (1)

Lead Sponsor Collaborator
National Taiwan University Hospital

Outcome

Type Measure Description Time frame Safety issue
Primary Alpha diversity Change in alpha diversity of bacterial species post-bowel preparation between probiotic group and placebo group. 32 weeks
Primary Beta diversity Change in beta diversity of bacterial species post-bowel preparation between probiotic group and placebo group. 32 weeks
Primary Bacterial species abundance Change in abundance of bacterial species post-bowel preparation between probiotic group and placebo group. 32 weeks
Secondary Incidence of functional bowel symptoms Incidence of GI associated symptoms in 8 weeks (abdominal discomfort, diarrhea, constipation, bloating) after bowel preparation between probiotic group (L) and placebo group (P). 32 weeks
Secondary BMI Change in BMI pre- and post-bowel preparation after probiotic or placebo supplementation 32 weeks
Secondary Insulin resistance Change in HOMA-IR pre- and post-bowel preparation after probiotic or placebo supplementation 32 weeks
Secondary Dyslipidemia Change in lipid profiles (T-CHO, LDL, HDL, TG in mg/dL) pre- and post-bowel preparation after probiotic or placebo supplementation 32 weeks
Secondary Total cholesterol Change in Total cholesterol (mg/dL) pre- and post-bowel preparation after probiotic or placebo supplementation 32 weeks
Secondary LDL Change in Low density lipoprotein, LDL (mg/dL) pre- and post-bowel preparation after probiotic or placebo supplementation 32 weeks
Secondary HDL Change in high density lipoprotein, HDL (mg/dL) pre- and post-bowel preparation after probiotic or placebo supplementation 32 weeks
Secondary TG Change in triglyceride, TG (mg/dL) pre- and post-bowel preparation after probiotic or placebo supplementation 32 weeks
Secondary Weight Change in weight (Kg) pre- and post-bowel preparation after probiotic or placebo supplementation 32 weeks
Secondary Waist Change in Waist (cm) pre- and post-bowel preparation after probiotic or placebo supplementation 32 weeks
Secondary Fatty liver (grade) Change in fatty liver severity (grade) pre- and post-bowel preparation after probiotic or placebo supplementation 32 weeks
Secondary Fatty liver (CAP) Change in fatty liver severity (CAP, dB/m) pre- and post-bowel preparation after probiotic or placebo supplementation 32 weeks
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