- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT05080205
Effects of Morbid Obesity and Bariatric Surgery on Brain Inflammation, Insulin Resistance and Central Reward System (BariBrainPET)
Effects of Morbid Obesity and Bariatric Surgery on Brain Inflammation, Insulin Resistance and Activation of Central Reward System Studied Using PET- and MRI-imaging
Background: Morbid obesity is associated with decreased brain µ-opioid receptor availability, possibly resulting in higher food intake needed to gain pleasure from eating. This decrease seems to normalize already 6 months after bariatric surgery, but the longer-term effects have not been studied. Obesity and insulin resistance result in significantly increased brain insulin-stimulated glucose uptake, whereas in every other tissue glucose uptake is lower. One possible explanation to this could be central inflammation and activation of brain glial cells, which has been shown to occur in animal models of obesity. Obesity has also been shown to associate with increased risk of Alzheimer's disease and cognitive decline in several studies.
Aims: The first objective of this study is to both study the effects of bariatric surgery as well as compare the effects of gastric bypass and sleeve gastrectomy on food-associated pleasure, extending the follow-up period to 2 years postoperatively. The second aim is to investigate the effect of morbid obesity and weight loss on brain inflammation and gliosis and its association with increased brain insulin-stimulated glucose uptake. Furthermore, association of obesity, insulin resistance, central inflammation and neurocognitive dysfunction are evaluated.
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
Type d'étude
Inscription (Réel)
Phase
- N'est pas applicable
Contacts et emplacements
Lieux d'étude
-
-
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Turku, Finlande, 20520
- Turku PET Centre
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion criteria:
Morbidly obese group
- BMI 35.0-45.0 kg/m2, or BMI 32.0-45.0 kg/m2 and diagnosed diabetes
- Age 18-60 years
- Eligible to bariatric surgery evaluated according to normal treatment paradigm
Non-obese controls
- BMI 18-27 kg/m2
- Age 18-60 years
- Fasting plasma glucose ≤6.1 mmol/L
- Normal values in 2-hour oral glucose tolerance test
Exclusion criteria:
Morbidly obese group
- Metal objects in the body (including pacemakers, metallic artificial valve prostheses, inner ear implants, surgical clipses, braces, foreign fragments)
- Previous participation in PET studies
- Pregnancy
- Poor compliance, alcohol or drug abuse
- Weight over 150 kg or waist circumference over 150 cm
- Diabetes with fasting glucose levels ≥7.0 mmol/L, or treatment with insulin
- Any chronic disease, medication or condition that could create a hazard to subject safety, endanger study procedures or interfere with the interpretation of results.
Non-obese controls
- Metal objects in the body (including pacemakers, metallic artificial valve prostheses, inner ear implants, surgical clipses, braces, foreign fragments)
- Previous participation in PET studies
- Pregnancy
- Poor compliance, alcohol or drug abuse
- Smoking
- History of eating disorders, drastic weight-gain or weight-loss
- History of psychiatric disorders
- Any chronic disease, medication or condition that could create a hazard to subject safety, endanger study procedures or interfere with the interpretation of results
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: Non randomisé
- Modèle interventionnel: Affectation à un seul groupe
- Masquage: Aucun (étiquette ouverte)
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
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Expérimental: Morbidly obese subjects
Bariatric surgery (Roux-en-Y gastric bypass or sleeve gastrectomy)
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Roux-en-Y gastric bypass or sleeve gastrectomy, chosen based on routine evaluation process
Autres noms:
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Aucune intervention: Control subjects
Non-obese controls are only studied at baseline
|
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Change in central inflammation
Délai: Controls: 0 months; Morbidly obese: preoperatively, 6 months postoperatively
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Assessment of brain glial cell activation using [11C]-PK11195 tracer and positron emission tomography
|
Controls: 0 months; Morbidly obese: preoperatively, 6 months postoperatively
|
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Changes in central reward system using fMRI imaging
Délai: Controls: 0 months; Morbidly obese: preoperatively, 6 months, 12 months, 24 months postoperatively
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Assessment of brain reward system activation after visual/taste cues using functional MRI
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Controls: 0 months; Morbidly obese: preoperatively, 6 months, 12 months, 24 months postoperatively
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Changes in brain μ-opioid receptor availability using PET imaging
Délai: Controls: 0 months; Morbidly obese: preoperatively, 6 months, 12 months postoperatively
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Assessment of brain μ-opioid receptor availability using [11C]-carfentanil tracer and positron emission tomography
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Controls: 0 months; Morbidly obese: preoperatively, 6 months, 12 months postoperatively
|
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Changes in cognitive function studied with testing
Délai: Controls: 0 months; Morbidly obese: preoperatively, 6 months, 12 months, 24 months postoperatively
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Neuropsychological testing focusing on memory, decision-making and inhibition
|
Controls: 0 months; Morbidly obese: preoperatively, 6 months, 12 months, 24 months postoperatively
|
|
Changes in whole-body insulin sensitivity usign FDG-PET imaging
Délai: Controls: 0 months; Morbidly obese: preoperatively, 6 months postoperatively
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Assessment of whole-body insulin sensitivity using hyperinsulinemic, euglycemic clamp
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Controls: 0 months; Morbidly obese: preoperatively, 6 months postoperatively
|
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Changes in tissue-specific insulin sensitivity using FDG-PET imaging
Délai: Controls: 0 months; Morbidly obese: preoperatively
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Assessment of insulin-stimulated glucose uptake in the brain, liver, skeletal muscle and adipose tissue by performing positron emission tomography with [18F]-fluorodeoxyglucose tracer during hyperinsulinemic, euglycemic clamp
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Controls: 0 months; Morbidly obese: preoperatively
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Collaborateurs et enquêteurs
Parrainer
Les enquêteurs
- Chercheur principal: Pirjo Nuutila, MD, PhD, Turku University Hospital
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Réel)
Achèvement primaire (Réel)
Achèvement de l'étude (Anticipé)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
- Processus pathologiques
- Troubles du métabolisme du glucose
- Maladies métaboliques
- Maladies du cerveau
- Maladies du système nerveux central
- Maladies du système nerveux
- Infections
- Suralimentation
- Troubles nutritionnels
- En surpoids
- Poids
- Infections du système nerveux central
- Hyperinsulinisme
- Obésité
- Encéphalite
- Inflammation
- Résistance à l'insuline
- Obésité morbide
- Encéphalite infectieuse
Autres numéros d'identification d'étude
- BariBrain-PET
- T153/2018 (Autre identifiant: The Hospital District of Southwest Finland)
Plan pour les données individuelles des participants (IPD)
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Description du régime IPD
Type d'informations de prise en charge du partage d'IPD
- Protocole d'étude
- Plan d'analyse statistique (PAS)
- Formulaire de consentement éclairé (ICF)
- Rapport d'étude clinique (CSR)
Informations sur les médicaments et les dispositifs, documents d'étude
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