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Effects of Tirzepatide on Gut Microbiota and Gastrointestinal Function After Drug Withdrawal in Obese Patients

10. oktober 2026 opdateret af: ZongDan Jiang, Nanjing First Hospital, Nanjing Medical University

Effects of Tirzepatide on Gut Microbiota and the Recovery Pattern of Gastric Emptying After Drug Withdrawal in Obese Patients

This is an observational cohort study. The primary objective is to analyze the dynamic changes in gut microbiota and metabolic profiles in obese patients treated with Tirzepatide. A total of 80 participants will be enrolled: 40 normal-weight controls (NW group) and 40 obese patients receiving Tirzepatide as part of their routine clinical care (OB-T group). Fecal samples for 16S rRNA sequencing and blood samples for metabolic markers will be collected at baseline and after 3 months. Changes in gut microbiota diversity and composition will be correlated with improvements in glucose and lipid metabolism. As per the approved protocol, exploratory follow-up assessments of gastrointestinal symptoms and gastric emptying parameters will also be conducted post-treatment.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Obesity is a global public health crisis, and gut microbiota dysbiosis plays a crucial role in its pathophysiology. Tirzepatide, a dual GIP/GLP-1 receptor agonist, has shown significant weight loss effects, but its impact on the human gut microbiome remains largely unexplored. This observational study aims to fill this gap by characterizing the longitudinal changes in gut microbiota in obese patients undergoing routine Tirzepatide treatment. The investigators will use 16S rRNA V3-V4 region sequencing to analyze microbial diversity and composition (Shannon, Simpson, Chao1 indices, PCoA, LEfSe). Furthermore, The investigators will explore the associations between these microbial shifts and improvements in glucose and lipid metabolism . As secondary and exploratory objectives, gastrointestinal symptoms (GSRS) and gastric emptying function (measured by 13C-octanoic acid breath test) will be monitored during the treatment and withdrawal phases to better understand the overall physiological impact of the treatment.

Undersøgelsestype

Observationel

Tilmelding (Anslået)

80

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

    • Jiangsu
      • Nanjing, Jiangsu, Kina
        • Nanjing First Hospital
        • Kontakt:

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 65 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

A total of 80 participants will be enrolled at Nanjing First Hospital, including 40 normal-weight healthy controls and 40 obese patients receiving routine Tirzepatide treatment.

Beskrivelse

Inclusion Criteria:

Normal Weight Control Group:

  • Age 18-65 years
  • 18.5 <= BMI < 24 kg/m2
  • No obesity-related complications
  • No diabetes, hypertension, or other metabolic diseases
  • No antibiotics, probiotics, or prebiotics in the past 3 months

Obese Treatment Group:

  • Age 18-65 years
  • BMI >= 30 kg/m2, or BMI >= 27 kg/m2 with at least one obesity-related complication
  • Physician-assessed indication for Tirzepatide
  • Planned initiation of Tirzepatide as part of routine clinical care
  • No antibiotics, probiotics, or prebiotics in the past 3 months

Exclusion Criteria:

  • Known inflammatory bowel disease (IBD), intestinal obstruction, or severe gastrointestinal disease
  • Gastrointestinal surgery within 6 months
  • Severe hepatic or renal impairment (ALT/AST > 3x ULN, eGFR < 30 ml/min/1.73m2)
  • History of malignancy
  • Severe psychiatric or cognitive disorder
  • Pregnancy or lactation
  • Acute infection within 1 month
  • Any condition deemed unsuitable by the investigator

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Observationsmodeller: COHORT
  • Tidsperspektiver: PROSPECTIVE

Kohorter og interventioner

Gruppe / kohorte
Intervention / Behandling
Normal Weight Control (NW)

Healthy volunteers with normal weight. No intervention is administered. Blood and fecal samples are collected.

Obese Treatment (OB-T)

Obese patients receiving Tirzepatide as part of their routine clinical care. The investigator only observes and collects blood and fecal samples.

Tirzepatide is administered as part of routine clinical care, not assigned by the investigator.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Changes in Gut Microbiota Characteristics
Tidsramme: Baseline (0 week) and 3 months

Assessed by 16S rRNA V3-V4 region sequencing. Includes Alpha diversity (Shannon, Simpson, Chao1), Beta diversity (PCoA), and core differential genera abundance (e.g., Akkermansia, Bacteroides).

Baseline (0 week) and 3 months

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Changes in Fasting Plasma Glucose,, Lipid Profile, and Body Weight
Tidsramme: Baseline (0 week) and 3 months

Assessed by routine fasting blood tests and anthropometric measurements. Metabolic markers include fasting plasma glucose, total cholesterol, LDL cholesterol, HDL cholesterol, triglycerides, and body weight.

Baseline (0 week) and 3 months
Change in Gastrointestinal Symptom Rating Scale (GSRS) Score◦
Tidsramme: Baseline (0 week) and 3 months

Assessed via the Gastrointestinal Symptom Rating Scale (GSRS) questionnaire.

Baseline (0 week) and 3 months
Change in Gastric Emptying Function
Tidsramme: Baseline, 3 months, and 1 week / 1 month after drug withdrawal◦

Measured by 13C-octanoic acid breath test.

Baseline, 3 months, and 1 week / 1 month after drug withdrawal◦

Samarbejdspartnere og efterforskere

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Sponsor

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

1. februar 2027

Primær færdiggørelse (Anslået)

1. juni 2027

Studieafslutning (Anslået)

1. juli 2027

Datoer for studieregistrering

Først indsendt

22. september 2026

Først indsendt, der opfyldte QC-kriterier

22. september 2026

Først opslået (Faktiske)

29. september 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

15. oktober 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

10. oktober 2026

Sidst verificeret

1. oktober 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • KY20260430-05-KS-01

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

IPD-planbeskrivelse

Data will not be shared due to participant privacy and ethical restrictions.

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