- ICH GCP
- Registro de ensaios clínicos dos EUA
- Ensaio Clínico 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
Visão geral do estudo
Status
Descrição detalhada
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.
Tipo de estudo
Inscrição (Estimado)
Estágio
- Não aplicável
Contactos e Locais
Contato de estudo
- Nome: Hun Jee Choe Hallym University Dongtan Sacred Heart Hospital, MD, PhD
- Número de telefone: +82-31-8086-2869
- E-mail: hunjeechoe@gmail.com
Estude backup de contato
- Nome: Hye Jeong Lee Hallym University Dongtan Sacred Heart Hospital, CRC
- Número de telefone: +82-10-4694-3886
- E-mail: geumzzogi@naver.com
Locais de estudo
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Gyeonggi-do
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Hwaseong-si, Gyeonggi-do, Coréia do Sul, 18450
- Hallym University Dongtan Sacred Heart Hospital
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Contato:
- Hun Jee Choe Hallym University Dongtan Sacred Heart Hospital, MD, PhD
- Número de telefone: +82-10-9493-5703
- E-mail: hunjeechoe@gmail.com
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Seongnam-si, Gyeonggi-do, Coréia do Sul, 13620
- Seoul National University Bundang Hospital
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Contato:
- Soo Lim Seoul National University Bundang Hospital, MD, PhD
- Número de telefone: +82-10-9766-2706
- E-mail: limsoo@snu.ac.kr
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Contato:
- Soo Lim Seoul National University Bundang Hospital, MD, PhD
- Número de telefone: +82-010-9766-2706
- E-mail: limsoo@snu.ac.kr
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Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
- Adulto
- Adulto mais velho
Aceita Voluntários Saudáveis
Descrição
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
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Ciência básica
- Alocação: N / D
- Modelo Intervencional: Atribuição de grupo único
- Mascaramento: Nenhum (rótulo aberto)
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
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Experimental: 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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O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
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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
Prazo: 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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Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
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Change in waist circumference
Prazo: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in body weight (kg)
Prazo: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in Body Mass Index (BMI)
Prazo: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in HbA1c (%)
Prazo: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in fasting glucose (mg/dL)
Prazo: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in HOMA-IR
Prazo: 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)
Prazo: 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)
Prazo: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in liver fat fraction (MRI-PDFF, %)
Prazo: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in liver stiffness by MRE (kPa)
Prazo: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in adipokines (adiponectin, leptin, NEFA)
Prazo: Baseline to 24 weeks
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Baseline to 24 weeks
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Change in hsCRP
Prazo: Baseline to 24 weeks
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Baseline to 24 weeks
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BAT-positive rate based on SUVmax at baseline
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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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Colaboradores e Investigadores
Patrocinador
Colaboradores
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo (Estimado)
Conclusão Primária (Estimado)
Conclusão do estudo (Estimado)
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Real)
Atualizações de registro de estudo
Última Atualização Postada (Real)
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Termos MeSH relevantes adicionais
- Distúrbios Nutricionais
- Doenças Metabólicas
- Supernutrição
- Peso corporal
- Alterações de Peso Corporal
- Distúrbios do Metabolismo da Glicose
- Resistência a insulina
- Hiperinsulinismo
- Excesso de peso
- Condições Patológicas, Sinais e Sintomas
- Doenças Nutricionais e Metabólicas
- Sinais e sintomas
- Obesidade
- Perda de peso
- Síndrome metabólica
- Semaglutide
Outros números de identificação do estudo
- 2026-04-009
- RS-2026-25483260 (Número de outro subsídio/financiamento: National Research Foundation of Korea)
Plano para dados de participantes individuais (IPD)
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Descrição do plano IPD
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