Healthy
Conditions
Keywords
prebiotic study, modulating colonic bacteria
Brief summary
The primary objective of this trial is to determine whether two doses of an extract from bran demonstrate a prebiotic effect on colonic bacteria (by modulating selected fecal microbial populations, particularly bifidobacteria). The secondary objective is to measure the potential beneficial effects of consuming an extract from bran on the following physiological parameters: laxation, fecal pH, fecal moisture and stool consistency, blood glucose and insulin concentrations, plasma lipid profiles and serum free fatty acids, colonic bacterial short chain fatty acid production, ammonia metabolism and protein degradation, and biomarkers of oxidative stress and inflammation.
Interventions
OTHERwheat bran extract
Comparison of control cereal (containing no added wheat bran extract)to two test cereals containing different amounts of added wheat bran extract
OTHERcontrol wheat bran extract
Comparison of control cereal (containing no added wheat bran extract) to two test cereals containing different amounts of added wheat bran extract
Sponsors
Provident Clinical Research
Tufts University
University of Toronto
University of Reading
University of Saskatchewan
Kellogg Company
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)
Eligibility
Sex/Gender
ALL
Age
18 Years to 75 Years
Healthy volunteers
Yes
Inclusion criteria
* Male or female * 18-75 years of age * Body mass index ≥18.5 and \<35.0 kg/m2 * Fasting LDL-C level ≥100 mg/dL and \<200 mg/dL * Otherwise judged to be in good health, willing to maintain habitual food and beverage intake and physical activity patterns throughout the trial
Exclusion criteria
* Significant gastrointestinal condition * Use of pre/probiotic foods or supplements * Use of antibiotics * Pregnancy * Certain muscle, liver, kidney, lung or gastrointestinal conditions and medications * Poorly controlled hypertension * Cancer treated within prior 2 years
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The primary outcome variable will be the difference between treatments in bifidobacteria counts per g of feces, expressed as log10 cells per g feces (dry weight) | Baseline to end of each treatment (week 0 to week 3 of each treatment) |
Secondary
| Measure | Time frame |
|---|---|
| Other fecal bacterial counts | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| laxation | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| fecal pH | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| fecal moisture | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| stool consistency | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| blood glucose | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| Blood insulin | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| plasma lipid profiles | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| serum free fatty acids | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| fecal short chain fatty acids | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| fecal ammonia | baseline to end of each treament (week 0 to week 3 of each treatment) |
| urinary para-cresol | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| urinary phenol (total) | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| urinary isoprostanes | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| oxidized low density lipoprotein (TBARS, conjugated dienes) | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| Urinary F2alpha-isoprostanes | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| Plasma antioxidant capacity (ORAC, FRAP) | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| serum amyloid A | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| hs-CRP | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| IL-6 | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| TNF-alpha | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| gastrointestinal symptom survey | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| stool consistency (Bristol stool scale) | baseline to end of each treatment (week 0 to week 3 of each treatment) |
| Quality of Life questionaire (Quality Metrics SF-36) | baseline to end of each treatment (week 0 to week 3 of each treatment) |
Countries
United States
Outcome results
None listed