Effect of Bile Acid Sequestration on Postprandial GLP-1 Secretion, Glucose Homeostasis and Gut Microbiota
Accumulating evidence suggests that bile acids and bacteria in our intestines may constitute essential components in the complex mechanisms regulating gut hormone secretion and glucose homeostasis. At the same time, bile acids and gut bacteria are interdependent. Thus, it is likely that modification of the enterohepatic circulation of bile acids can lead to changes in gut hormone secretion or gut bacteria composition and consequently affect glucose homeostasis.
The current study is a human interventional study with 7-day ingestion of a bile acid sequestrant or placebo, preceded and followed by meal tests and faecal sampling. The aim is to examine how (and if) bile acid sequestration can influence postprandial glucagon-like peptide-1 (GLP-1) secretion, gut microbiota and glucose homeostasis in patients with type 2 diabetes and healthy individuals. As a tool to sequester bile acids we will use sevelamer, a phosphate binding resin used in the treatment of hyperphosphataemia in adult patients with chronic kidney disease. Surprisingly, sevelamer was recently shown to improve glycaemic control in patients with chronic kidney disease and type 2 diabetes.
The investigators hypothesize that higher luminal concentrations of bile acids in the distal gut will elicit changes in the postprandial gut hormone secretion and gut bacteria composition. The current study will help to clarify this hypothesis and improve our general understanding of the association between bile acid circulation and signalling, gut hormone secretion, gut bacteria and glucose metabolism.
Studie Overzicht
Toestand
Conditie
Interventie / Behandeling
Studietype
Inschrijving (Werkelijk)
Fase
- Niet toepasbaar
Contacten en locaties
Studie Locaties
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Hellerup, Denemarken, 2900
- Diabetes Research Division, Gentofte Hospital, Copenhagen
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Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
Accepteert gezonde vrijwilligers
Geslachten die in aanmerking komen voor studie
Beschrijving
Inclusion Criteria:
Both groups
- Caucasian ethnicity
- Normal haemoglobin
- Age above 35 years and below 80 years
- Informed and written consent
- BMI > 23 kg/m2 and <35 kg/m2
Patients with type 2 diabetes
- Type 2 diabetes for at least 3 months
- Diagnosed according to the criteria of the World Health Organization (WHO)
Healthy Subjects
- Normal fasting plasma glucose (FPG) <6.5 mM and
- Normal glycated haemoglobin (HbA1c) <6.0 %
Exclusion Criteria:
Both groups
- Liver disease (alanine aminotransferase (ALAT) and/or serum aspartate aminotransferase (ASAT) >2 times normal values) or history of hepatobiliary disorder
- Gastrointestinal disease, previous intestinal resection, cholecystectomy or any major intra-abdominal surgery
- Hypo- or hyperphosphataemia
- Nephropathy (serum creatinine >150 µM and/or albuminuria
- Treatment with medicine that cannot be paused for 12 hours
- Intake of antibiotics six months prior to study
- Hypo- or hypercalcaemia
- Hypo- and hyperthyroidism
- Treatment with oral anticoagulants
- Active or recent malignant disease
- Any treatment or condition requiring acute or sub-acute medical or surgical intervention
- Lack of effective birth control in premenopausal women
- Positive pregnancy test on study days in premenopausal women
- Tobacco smoking
- Any condition considered incompatible with participation by the investigators
Patients with type 2 diabetes
- Treatment with insulin
- Treatment with incretin-based therapy
Healthy Subjects
- Diabetes or
- prediabetes (fasting plasma glucose levels >6.5 mM or HbA1c >6.0%)
- First-degree relatives with diabetes
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Fundamentele wetenschap
- Toewijzing: Gerandomiseerd
- Interventioneel model: Parallelle opdracht
- Masker: Dubbele
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
|---|---|
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Actieve vergelijker: T2DM, sevelamer
Patients with type 2 diabetes treated with sevelamer
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Placebo-vergelijker: T2DM, placebo
Patients with type 2 diabetes treated with placebo
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Actieve vergelijker: Healthy subjects, sevelamer
Healthy subjects treated with sevelamer
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Placebo-vergelijker: Healthy subjects, placebo
Healthy subjects treated with placebo
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Incremental and total area under the Concentration-Time Curve (AUC 0-240 min)
Tijdsspanne: -30, -15, 0, 10, 20, 30, 45, 60, 90, 120, 180, 240 min on study days 1 and 7 (meal tests start at 0 min)
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Postprandial responses of glucagon-like peptide-1 (GLP-1)
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-30, -15, 0, 10, 20, 30, 45, 60, 90, 120, 180, 240 min on study days 1 and 7 (meal tests start at 0 min)
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Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
|
Incremental and total area under the Concentration-Time Curve (AUC 0-240 min)
Tijdsspanne: -30, -15, 0, 10, 20, 30, 45, 60, 90, 120, 180, 240 min on study days 1 and 7 (meal tests start at 0 min)
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Postprandial responses of various other gut hormones
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-30, -15, 0, 10, 20, 30, 45, 60, 90, 120, 180, 240 min on study days 1 and 7 (meal tests start at 0 min)
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Andere uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Blood analysis
Tijdsspanne: Fasting status on study days 1 and 7
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Lipids
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Fasting status on study days 1 and 7
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Blood analysis
Tijdsspanne: Fasting status on study days 1 and 7
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Inflammatory and metabolic markers
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Fasting status on study days 1 and 7
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Faecal samples
Tijdsspanne: Prior to study days 1 and 7
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Gut microbiota composition
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Prior to study days 1 and 7
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Blood analysis of paracetamol
Tijdsspanne: -30 min to 240 min (ingestion of meal at 0 min) on study days 1 and 7
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Assessment of gastric emptying
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-30 min to 240 min (ingestion of meal at 0 min) on study days 1 and 7
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Bodyweight
Tijdsspanne: Fasting state on study days 1 and 7
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Fasting state on study days 1 and 7
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|
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Indirect calorimetry
Tijdsspanne: -30 min to 240 min (ingestion of meal at 0 min) on study days 1 and 7
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Basal metabolic rate
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-30 min to 240 min (ingestion of meal at 0 min) on study days 1 and 7
|
|
Ultrasound measurements
Tijdsspanne: -30 min to 240 min (ingestion of meal at 0 min) on study days 1 and 7
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Gall bladder volume
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-30 min to 240 min (ingestion of meal at 0 min) on study days 1 and 7
|
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Visual analog scale score
Tijdsspanne: -30 min to 240 min (ingestion of meal at 0 min) on study days 1 and 7
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Appetite
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-30 min to 240 min (ingestion of meal at 0 min) on study days 1 and 7
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Medewerkers en onderzoekers
Medewerkers
Studie record data
Bestudeer belangrijke data
Studie start
Primaire voltooiing (Werkelijk)
Studie voltooiing (Werkelijk)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Schatting)
Updates van studierecords
Laatste update geplaatst (Schatting)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
- H-2-2013-148
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