Dietary Interventions and Butyrate Production in Behçet's Patients
- Conditions
- Behcet Syndrome
- Interventions
- Dietary Supplement: Oral butyrateDietary Supplement: Vegetarian dietDietary Supplement: Habitual diet
- Registration Number
- NCT03274648
- Lead Sponsor
- Azienda Ospedaliero-Universitaria Careggi
- Brief Summary
A dietary intervention trial will be performed on patients affected by Behçet's syndrome. Three different diets will be compared, analyzing their effects on the gut microbiota composition, on endogenous butyrate production and on the general symptoms in Behçet's patients.
- Detailed Description
A dietary intervention trial will be conducted with the use of three different diets in order to compare the effects of these diets on the gut microbiota composition, on endogenous butyrate production and on the general symptoms in Behçet's patients.
The study will be a randomized, open trial designed to test whether a vegetarian diet or an habitual diet supplemented with oral butyrate would benefit the butyrate production, the gut microbiota composition and the general symptoms of Behçet's patients, compared with the habitual diet.
The study will involve 30 subjects with Behçet syndrome. Patients will be randomly assigned to follow a 3-months isocaloric dietary profile with either:
* vegetarian diet containing inulin and resistant starch-rich foods, including no meat and fish, but containing eggs and dairy products
* habitual diet supplemented with 2.4g/day of oral butyrate
* habitual diet without supplementation At the baseline visit, subjects will be educated about the aims and methods of the clinical trial and will sign their informed consent form.
Anthropometric measurements, body composition, and blood and stool sampling will be obtained from each participant at the beginning and at the end of the intervention period. All subjects will be examined between 07.00 and 09.30 hours after a 12 h fasting period.
The following parameters will be analyzed both at the beginning and at the end of the intervention period:
* Complete blood count
* Lipid variables - total cholesterol, low density lipoprotein cholesterol (LDL), high density lipoprotein cholesterol (HDL), triglycerides
* Glycemic profile - glucose, insulin, glycated hemoglobin (HbA1C), HOMA index
* Liver function tests - aspartate aminotransferase (AST), alanine transaminase (ALT), gammaglutamyl transferase (GGT), alkaline phosphatase (ALP), albumin, prealbumin
* Kidney function tests - serum creatinine, urea, uric acid
* Mineral profile - sodium, potassium, magnesium, calcium
* Iron metabolism - iron, ferritin
* Vitamin profile - vitamin B12, folic acid, vitamin D
* Thyroid function - TSH
* Inflammatory markers - erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), fibrinogen, serum amyloid A (SAA)
* Serology for celiac disease - IgA, anti-transglutaminase antibodies (IgA), anti endomysium antibodies (IgA)
* Circulating levels of inflammatory cytokines
* Oxidative stress markers
* Gut microbiota composition
* Butyrate production
At the beginning and at the end of the intervention period, participants will be asked to complete a questionnaire, which will assess Behçet's symptoms frequency and severity. In addition, participants will be contacted by phone to complete a 24-hours recall in order to test the adherence to diets they have been assigned to.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 17
- All patients affected by Behçet's disease
- Pregnancy or breastfeeding
- Presence of diabetes mellitus
- Presence of other immune-mediated diseases
- Presence or history of cancer in the last 5 years
- Presence of infectious diseases in the last 3 months
- No antibiotic therapy in the last 3 months
- No vegetarian or vegan diet
- No intake of pro- or pre-biotics in the last 3 months
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Habitual diet + oral butyrate Oral butyrate habitual diet supplemented with 2.4g/day of oral butyrate vegetarian diet Vegetarian diet vegetarian diet containing inulin and resistant starch-rich foods, including no meat and fish, but containing eggs and dairy products Habitual diet Habitual diet habitual diet without supplementation
- Primary Outcome Measures
Name Time Method Evaluation of gut microbiota composition 0-3 months Thyroid function 0-3 months measurement of TSH levels
Evaluation of butyrate production 0-3 months For the extraction of SCFAs (and butyrate in particular) the method described in Schnorr et al. will be follow" \[Schnorr SL, Candela M, Rampelli S, Centanni M, Consolandi C, Basaglia G,et al. Gut microbiome of the Hadza hunter-gatherers. Nat Commun 2014;5:3654\]
Lipid variables 0-3 months composite score taking into account the levels of: total cholesterol, low density lipoprotein cholesterol (LDL), high density lipoprotein cholesterol (HDL), triglycerides
Glycemic profile 0-3 months composite score taking into account the levels of : glucose, insulin, glycated hemoglobin (HbA1C), HOMA index
Complete blood count 0-3 months composite score
Iron metabolism 0-3 months composite score taking into account the levels of: iron, ferritin
Inflammatory markers 0-3 months composite score taking into account the levels of: erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), fibrinogen, serum amyloid A (SAA)
Vitamin profile 0-3 months composite score, taking into account the levels of: vitamin B12, folic acid, vitamin D
Serology for celiac disease 0-3 months composite score taking into account the levels of: IgA, anti-transglutaminase antibodies (IgA), anti endomysium antibodies (IgA)
Oxidative stress markers 0-3 months composite score
Liver function tests 0-3 months composite score taking into account the levels of: aspartate aminotransferase (AST), alanine transaminase (ALT), gammaglutamyl transferase (GGT), alkaline phosphatase (ALP), albumin, prealbumin
Kidney function tests 0-3 months composite score taking into account the levels of : serum creatinine, urea, uric acid
Mineral profile 0-3 months composite score taking into account the levels of: sodium, potassium, magnesium, calcium
Circulating levels of inflammatory cytokines 0-3 months composite score
- Secondary Outcome Measures
Name Time Method Evaluation Behçet's symptoms frequency and severity 0-3 months Participants are asked to complete a questionnaire, which will assess Behçet's symptoms frequency and severity.
Trial Locations
- Locations (1)
AOU Careggi
🇮🇹Florence, Italy