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Brown Adipose Tissue as a Mechanistic Determinant of Semaglutide Treatment Response in Obesity (BAT-Sema Study) (BAT-Sema)

20. juli 2026 oppdatert av: Hun Jee Choe, Hallym University

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

This study investigates whether the activity of brown adipose tissue (BAT) - a special type of fat that burns energy as heat - can predict how well individuals with obesity respond to semaglutide (Wegovy), a once-weekly injectable weight loss medication. Participants who are starting semaglutide treatment will undergo ¹⁸FDG-PET/CT imaging before and after 24 weeks of treatment. Prior to each PET/CT scan, participants will wear a water-circulating cooling vest to activate BAT. By measuring BAT activity at baseline and comparing it with the degree of weight loss and metabolic improvement at 24 weeks, the investigators aim to identify BAT as a predictive biomarker for personalized obesity treatment.

Studieoversikt

Status

Har ikke rekruttert ennå

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

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.

Studietype

Intervensjonell

Registrering (Antatt)

80

Fase

  • Ikke aktuelt

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

  • Navn: Hun Jee Choe Hallym University Dongtan Sacred Heart Hospital, MD, PhD
  • Telefonnummer: +82-31-8086-2869
  • E-post: hunjeechoe@gmail.com

Studer Kontakt Backup

  • Navn: Hye Jeong Lee Hallym University Dongtan Sacred Heart Hospital, CRC
  • Telefonnummer: +82-10-4694-3886
  • E-post: geumzzogi@naver.com

Studiesteder

  • Sør -Korea
    • Gyeonggi-do
      • Hwaseong-si, Gyeonggi-do, Sør -Korea, 18450
        • Hallym University Dongtan Sacred Heart Hospital
        • Ta kontakt med:
          • Hun Jee Choe Hallym University Dongtan Sacred Heart Hospital, MD, PhD
          • Telefonnummer: +82-10-9493-5703
          • E-post: hunjeechoe@gmail.com
      • Seongnam-si, Gyeonggi-do, Sør -Korea, 13620
        • Seoul National University Bundang Hospital
        • Ta kontakt med:
          • Soo Lim Seoul National University Bundang Hospital, MD, PhD
          • Telefonnummer: +82-10-9766-2706
          • E-post: limsoo@snu.ac.kr
        • Ta kontakt med:
          • Soo Lim Seoul National University Bundang Hospital, MD, PhD
          • Telefonnummer: +82-010-9766-2706
          • E-post: limsoo@snu.ac.kr

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

  • Voksen
  • Eldre voksen

Tar imot friske frivillige

Nei

Beskrivelse

Inclusion Criteria:

  1. Age 20-70 years at the time of enrollment
  2. Initiating semaglutide (Wegovy) treatment for obesity (newly starting treatment)

  3. 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)
  4. Ability and willingness to provide written informed consent

Exclusion Criteria:

  1. Diagnosis of type 1 or type 2 diabetes mellitus
  2. History of neck surgery or radiation therapy to the neck
  3. Use of anti-obesity medications within 1 month prior to enrollment, or current use of beta-adrenergic blocking agents
  4. Personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia type 2 (MEN2)
  5. Active malignancy, severe renal disease (eGFR <30 mL/min/1.73m²), severe hepatic disease, or other severe endocrine disorders
  6. Pregnancy or breastfeeding
  7. Severe psychiatric illness or cognitive impairment precluding informed consent
  8. Contraindication to MRI (pacemaker, cochlear implant, non-MRI-compatible implants)
  9. Severe claustrophobia

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Grunnvitenskap
  • Tildeling: N/A
  • Intervensjonsmodell: Enkeltgruppeoppdrag
  • Masking: Ingen (Open Label)

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: 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.
Legemiddel: Semaglutide (Wegovy®)
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.
Fremgangsmåte: ¹⁸FDG-PET/CT with cold stimulation
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.
Fremgangsmåte: Liver MRI (PDFF + MRE)
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).

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
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
Tidsramme: Baseline to 24 weeks
: 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).
Baseline to 24 weeks

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Change in waist circumference
Tidsramme: Baseline to 24 weeks
Baseline to 24 weeks
Change in body weight (kg)
Tidsramme: Baseline to 24 weeks
Baseline to 24 weeks
Change in Body Mass Index (BMI)
Tidsramme: Baseline to 24 weeks
Baseline to 24 weeks
Change in HbA1c (%)
Tidsramme: Baseline to 24 weeks
Baseline to 24 weeks
Change in fasting glucose (mg/dL)
Tidsramme: Baseline to 24 weeks
Baseline to 24 weeks
Change in HOMA-IR
Tidsramme: Baseline to 24 weeks
Baseline to 24 weeks
Change in fasting lipids (LDL-C, HDL-C, TG, TC)
Tidsramme: Baseline to 24 weeks
Baseline to 24 weeks
Change in body composition by BIA (fat mass, lean mass, skeletal muscle mass)
Tidsramme: Baseline to 24 weeks
Baseline to 24 weeks
Change in liver fat fraction (MRI-PDFF, %)
Tidsramme: Baseline to 24 weeks
Baseline to 24 weeks
Change in liver stiffness by MRE (kPa)
Tidsramme: Baseline to 24 weeks
Baseline to 24 weeks
Change in adipokines (adiponectin, leptin, NEFA)
Tidsramme: Baseline to 24 weeks
Baseline to 24 weeks
Change in hsCRP
Tidsramme: Baseline to 24 weeks
Baseline to 24 weeks
BAT-positive rate based on SUVmax at baseline
Tidsramme: Baseline
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.
Baseline
Change in Quality of life using the Impact of Weight on Quality of Life-Lite Clinical Trials (IWQOL-Lite-CT) total score
Tidsramme: Baseline to 24 weeks
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).
Baseline to 24 weeks
Change in Quality of Life using the Short Form-36 Health Survey Version 2 (SF-36v2) domain scores
Tidsramme: Baseline to 24 weeks
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).
Baseline to 24 weeks
Change in BAT activity (SUVmax, SUVmean, BAT volume, TMA) from baseline to 24 weeks
Tidsramme: Baseline to 24 weeks
Baseline to 24 weeks
BAT-positive rate based on CT Hounsfield Units (HU) at baseline
Tidsramme: Baseline
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.
Baseline

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Hallym University

Samarbeidspartnere

Hallym University Dongtan Sacred Heart Hospital

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Antatt)

1. juni 2026

Primær fullføring (Antatt)

1. februar 2028

Studiet fullført (Antatt)

1. februar 2031

Datoer for studieregistrering

Først innsendt

20. mai 2026

Først innsendt som oppfylte QC-kriteriene

27. mai 2026

Først lagt ut (Faktiske)

2. juni 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

22. juli 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

20. juli 2026

Sist bekreftet

1. juli 2026

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • 2026-04-009
  • RS-2026-25483260 (Annet stipend/finansieringsnummer: National Research Foundation of Korea)

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

NEI

IPD-planbeskrivelse

Individual participant data will not be shared publicly. De-identified aggregate results will be published in peer-reviewed journals

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .

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