Impact of Bariatric Surgery on the Gut Environment (IMPORTUNE)
Impact of the Bacterial Colonial Metabolism on Fecal Water Toxicity as Biomarkers of Future Colorectal Cancer Risk After Bariatric Surgery
Studieoversigt
Status
Status
Betingelser
Betingelser
Detaljeret beskrivelse
To quantify protein assimilation after bariatric surgery, the investigators will perform in bariatric surgery patients (Roux-en- Y gastric bypass and Sleeve Gastrectomy) and in a control group a cross-sectional study with a single test day. On the test day, the study participants will consume a test meal that contains intrinsically labelled egg proteins and will take a capsule with 14C-glycocholic acid and a capsule with 3H-labelled polyethylene glycol. Participants will record a food diary 72h before and after the test day and during the test collect breath samples for 6h. Urine and stool will be collected respectively up to 24h and 72h after consumption of the test meal.
For the 1-year follow up study, the 3 patient groups (Roux-en-Y gastric bypass, Sleeve gastrectomy and control group with traditional weight loss therapy) will have 5 visits, a baseline visit and 4 visits after surgery or after starting traditional therapy. The time points after baseline include 2 weeks, 3 months, 6 months and 12 months. Each visit, a blood and stool sample will be collected, a 7-day food and stool diary will be registered and also weight loss will be recorded.
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Kontakter og lokationer
Studiesteder
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Vlaams-Brabant
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Leuven, Vlaams-Brabant, Belgien, 3000
- University Hospital Leuven
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Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Prøveudtagningsmetode
Studiebefolkning
- Surgery patient group was recruited at the University Hospital Leuven.
- Obese control group was recruited at the Obesity Clinic of the University Hospital Leuven.
- Normal and overweight control group was recruited among the employees and family members from employees of the University Hospital Leuven.
Beskrivelse
Inclusion Criteria:
- Surgery patients (toxicity and protein assimilation) : BMI > 40 kg/m² or > 35 kg/m² if combined with either obstructive sleep apnoea syndrome, high blood pressure not controllable with 3 different medications or type II diabetes, (3) exclusion of other underlying causes of obesity by an endocrinologist, (4) having tried to lose weight on a non-surgical way for at least 1 year without result and (5) a positive advice from a multidisciplinary team consisting of a surgeon, endocrinologist, psychologist and dietitian.
- Obese control group in weight loss program (toxicity) : obese but otherwise healthy patients on a weight loss diet (BMI > 30 kg/m²) in the context of the weight-loss program organised at the Obesity Clinic of University Hospital Leuven.
- Control group (protein assimilation) : normal weight (BMI 25-30 kg/m²) or overweight (BMI 25-30 kg/m²).
Exclusion Criteria:
- Intake of antibiotics 1 months before the start of the study. Pre-and probiotics, laxatives and anti-diarrhea drugs 2 weeks before the start of the study.
- Surgery patients and control group (toxicity) : Gastrointestinal disease or major abdominal surgery in the past (except from appendectomy and cholecystectomy).
- Surgery patients and control group (protein assimilation) : Lung, liver, kidney and gastrointestinal disease or major abdominal surgery in the past (except from appendectomy, cholecystectomy and bariatric surgery). Vegan, vegetarian, lactose-or gluten-free diet. Pregnant or lactating women and subjects who participated in the last year in a study with irradiation exposure.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
Antal grupper/kohorter
Kohorter og interventioner
Gruppe / kohorteGruppe / kohorte |
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Roux-en-Y gastric bypass
Patients who were planned for surgery with Roux-en-Y gastric bypass and were operated
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Sleeve Gastrectomy
Patients who were planned for surgery with Sleeve Gastrectomy and were operated
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Control group
Obese patients involved in a weight loss program that focuses on diet and lifestyle changes
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Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Change from baseline in toxicity of faecal water up to 1 year after bariatric surgery
Tidsramme: Baseline and 2 weeks, 3 months, 6 months and 1 year after surgery
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Faecal water toxicity : measured with a cell viability test.
Toxicity : expressed as the dilution of faecal water at which 50 percent of the cells survive.
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Baseline and 2 weeks, 3 months, 6 months and 1 year after surgery
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Degree of protein assimilation 6-24 months after bariatric surgery
Tidsramme: 6-24 months after surgery
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Protein digestion, malabsorption and fermentation : assessed with stable isotope technology.
Digestion and malabsorption : expressed as percent of the administered isotope dose.
Fermentation : expressed as percent of maximal dose of the fermentation product that can be formed.
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6-24 months after surgery
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Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Degree of fat malabsorption 6-24 months after bariatric surgery
Tidsramme: 6-24 months after surgery
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Malabsorption of fat : calculated as ((fat intake- fat excretion)/fat intake)*100%, expressed as coefficient of fat absorption.
Excretion : measured with the Van de Kamer method.
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6-24 months after surgery
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: Kristin Verbeke, PhD, KU Leuven
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- s59836
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