- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT07621640
Brown Adipose Tissue as a Mechanistic Determinant of Semaglutide Treatment Response in Obesity (BAT-Sema Study) (BAT-Sema)
Brown Adipose Tissue as a Mechanistic Determinant of GLP-1 Receptor Agonist Treatment Response in Adults With Obesity: A Multicenter Prospective Cohort Study Using ¹⁸FDG-PET/CT and Cold Stimulation Protocol
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
Despite the remarkable efficacy of semaglutide (GLP-1 receptor agonist) in treating obesity, considerable individual variation in treatment response remains unexplained. Brown adipose tissue (BAT) is a metabolically active thermogenic organ that has been implicated in energy expenditure, insulin sensitivity, and cardiometabolic health. We hypothesize that baseline BAT activity, as measured by ¹⁸FDG-PET/CT following individualized cold stimulation, is a mechanistic determinant of semaglutide treatment response in adults with obesity without diabetes.
This multicenter prospective cohort study will enroll 80 adults (40 per site: Hallym University Dongtan Sacred Heart Hospital and Seoul National University Bundang Hospital) with BMI ≥27 kg/m² plus obesity-related comorbidity, or BMI ≥30 kg/m², who are initiating semaglutide therapy. ¹⁸FDG-PET/CT with standardized cold stimulation (water-circulating cooling vest, starting at 16°C, individualized to prevent shivering) will be performed at baseline (V1) and 24 weeks (V7). BAT activity (SUVmax, SUVmean, BAT volume, total metabolic activity) will be quantified per BARCIST 1.0 criteria. Liver fat fraction (MRI-PDFF) and liver stiffness (MR elastography) will be assessed as secondary endpoints. Correlations between baseline BAT parameters and treatment outcomes (% body weight loss, metabolic biomarker changes) will be analyzed.
Type d'étude
Inscription (Estimé)
Phase
- N'est pas applicable
Contacts et emplacements
Coordonnées de l'étude
- Nom: Hun Jee Choe Hallym University Dongtan Sacred Heart Hospital, MD, PhD
- Numéro de téléphone: +82-31-8086-2869
- E-mail: hunjeechoe@gmail.com
Sauvegarde des contacts de l'étude
- Nom: Hye Jeong Lee Hallym University Dongtan Sacred Heart Hospital, CRC
- Numéro de téléphone: +82-10-4694-3886
- E-mail: geumzzogi@naver.com
Lieux d'étude
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Gyeonggi-do
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Hwaseong-si, Gyeonggi-do, Corée du Sud, 18450
- Hallym University Dongtan Sacred Heart Hospital
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Contact:
- Hun Jee Choe Hallym University Dongtan Sacred Heart Hospital, MD, PhD
- Numéro de téléphone: +82-10-9493-5703
- E-mail: hunjeechoe@gmail.com
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Seongnam-si, Gyeonggi-do, Corée du Sud, 13620
- Seoul National University Bundang Hospital
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Contact:
- Soo Lim Seoul National University Bundang Hospital, MD, PhD
- Numéro de téléphone: +82-10-9766-2706
- E-mail: limsoo@snu.ac.kr
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Contact:
- Soo Lim Seoul National University Bundang Hospital, MD, PhD
- Numéro de téléphone: +82-010-9766-2706
- E-mail: limsoo@snu.ac.kr
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
- Adulte
- Adulte plus âgé
Accepte les volontaires sains
La description
Inclusion Criteria:
- Age 20-70 years at the time of enrollment
- Initiating semaglutide (Wegovy) treatment for obesity (newly starting treatment)
BMI ≥ 27 kg/m² with at least one weight-related comorbidity:
- Hypertension (SBP ≥130 or DBP ≥80 mmHg, or on antihypertensive medication)
- Dyslipidemia (LDL-C ≥130, TG ≥150, or low HDL-C, or on lipid-lowering medication)
- Non-alcoholic fatty liver disease (NAFLD/MASLD, confirmed by imaging or ALT/AST ≥1.5× ULN)
- Obstructive sleep apnea (AHI ≥5/hr or clinically diagnosed)
- Established cardiovascular disease (CAD, stroke, PAD)
- Obesity-related osteoarthritis of knee or hip with functional impairment OR BMI ≥ 30 kg/m² (regardless of comorbidity)
- Ability and willingness to provide written informed consent
Exclusion Criteria:
- Diagnosis of type 1 or type 2 diabetes mellitus
- History of neck surgery or radiation therapy to the neck
- Use of anti-obesity medications within 1 month prior to enrollment, or current use of beta-adrenergic blocking agents
- Personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia type 2 (MEN2)
- Active malignancy, severe renal disease (eGFR <30 mL/min/1.73m²), severe hepatic disease, or other severe endocrine disorders
- Pregnancy or breastfeeding
- Severe psychiatric illness or cognitive impairment precluding informed consent
- Contraindication to MRI (pacemaker, cochlear implant, non-MRI-compatible implants)
- Severe claustrophobia
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Science basique
- Répartition: N / A
- 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: Semaglutide + BAT Evaluation
Adults with obesity initiating semaglutide (0.25 mg → 2.4 mg over 20 weeks, maintained for 4 weeks; total 24 weeks).
At baseline and 24 weeks, ¹⁸FDG-PET/CT with individualized cold stimulation (water-circulating cooling vest at 16°C, 60 minutes) and liver MRI (PDFF + MRE) are performed.
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Once-weekly subcutaneous injection, titrated from 0.25 mg to 2.4 mg over 20 weeks per standard protocol.
Standard of care treatment for obesity.
Whole-body ¹⁸FDG-PET/CT (5.18 MBq/kg, max 370 MBq) after 60-minute individualized cold stimulation using a water-circulating cooling vest (Polar Products Arctic Chiller, starting 16°C).
Performed at baseline (V1) and 24 weeks (V7).
BAT activity quantified per BARCIST 1.0.
Hepatic proton density fat fraction (MRI-PDFF) and liver stiffness by MR elastography (MRE) using Siemens MAGNETOM Vida 3T.
Performed at baseline (V1) and 24 weeks (V7).
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Correlation between baseline BAT metabolic activity (SUVmean and BAT volume on ¹⁸FDG-PET/CT) and percentage body weight loss at 24 weeks of semaglutide treatment
Délai: Baseline to 24 weeks
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: Pearson (or Spearman) correlation coefficient between baseline BAT parameters (SUVmean, BAT volume, total metabolic activity per BARCIST 1.0) and % body weight loss after 24 weeks of semaglutide therapy (0.25 mg escalated to 2.4 mg).
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Baseline to 24 weeks
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Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Change in waist circumference
Délai: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in body weight (kg)
Délai: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in Body Mass Index (BMI)
Délai: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in HbA1c (%)
Délai: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in fasting glucose (mg/dL)
Délai: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in HOMA-IR
Délai: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in fasting lipids (LDL-C, HDL-C, TG, TC)
Délai: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in body composition by BIA (fat mass, lean mass, skeletal muscle mass)
Délai: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in liver fat fraction (MRI-PDFF, %)
Délai: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in liver stiffness by MRE (kPa)
Délai: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in adipokines (adiponectin, leptin, NEFA)
Délai: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in hsCRP
Délai: Baseline to 24 weeks
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Baseline to 24 weeks
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BAT-positive rate based on SUVmax at baseline
Délai: Baseline
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The percentage of participants determined as brown adipose tissue (BAT)-positive, defined by a maximum standardized uptake value (SUVmax) of 1.5 or higher ($\ge 1.5$) at baseline.
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Baseline
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Change in Quality of life using the Impact of Weight on Quality of Life-Lite Clinical Trials (IWQOL-Lite-CT) total score
Délai: Baseline to 24 weeks
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The Impact of Weight on Quality of Life-Lite Clinical Trials (IWQOL-Lite-CT) is a self-report questionnaire used to assess the quality of life in individuals with obesity.
The total score ranges from a minimum of 0 to a maximum of 100, where higher scores indicate a better outcome (better quality of life).
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Baseline to 24 weeks
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Change in Quality of Life using the Short Form-36 Health Survey Version 2 (SF-36v2) domain scores
Délai: Baseline to 24 weeks
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The Short Form-36 Health Survey Version 2 (SF-36v2) is a 36-item questionnaire measuring health-related quality of life across 8 domains: Physical Functioning, Role-Physical, Bodily Pain, General Health, Vitality, Social Functioning, Role-Emotional, and Mental Health.
Each domain score ranges from a minimum of 0 to a maximum of 100, where higher scores indicate a better outcome (better health status or higher quality of life).
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Baseline to 24 weeks
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Change in BAT activity (SUVmax, SUVmean, BAT volume, TMA) from baseline to 24 weeks
Délai: Baseline to 24 weeks
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Baseline to 24 weeks
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BAT-positive rate based on CT Hounsfield Units (HU) at baseline
Délai: Baseline
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The percentage of participants determined as brown adipose tissue (BAT)-positive, defined by Computed Tomography Hounsfield Units (CT HU) within the range of $-250$ to $-50$ at baseline.
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Baseline
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Collaborateurs et enquêteurs
Parrainer
Collaborateurs
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Estimé)
Achèvement primaire (Estimé)
Achèvement de l'étude (Estimé)
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
Mots clés
Termes MeSH pertinents supplémentaires
- Troubles nutritionnels
- Maladies métaboliques
- Suralimentation
- Poids
- Changements de poids corporel
- Troubles du métabolisme du glucose
- Résistance à l'insuline
- Hyperinsulinisme
- En surpoids
- Conditions pathologiques, signes et symptômes
- Maladies nutritionnelles et métaboliques
- Signes et symptômes
- Obésité
- Perte de poids
- Syndrome métabolique
- sémaglutide
Autres numéros d'identification d'étude
- 2026-04-009
- RS-2026-25483260 (Autre subvention/numéro de financement: National Research Foundation of Korea)
Plan pour les données individuelles des participants (IPD)
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Description du régime IPD
Informations sur les médicaments et les dispositifs, documents d'étude
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