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Fecal Microbiota Transplantation for Ulcerative Colitis Using Dai and Han Donors

11 de setembro de 2026 atualizado por: Yinglei Miao, First Affiliated Hospital of Kunming Medical University

Fecal Microbiota Transplantation for Ulcerative Colitis Using Healthy Donors From Yunnan Dai and Han Nationalities: A Randomized Study to Screen Core Metabolites and Key Microbiota

This study is a randomized clinical trial evaluating fecal microbiota transplantation (FMT) for ulcerative colitis (UC) using healthy donors from two ethnic groups in Yunnan, China. UC is a chronic inflammatory bowel disease causing colon inflammation and ulcers. FMT transfers gut bacteria from a healthy donor to a patient to restore healthy intestinal microbiota.

Previous research suggested that FMT using donors from the Dai ethnic group (a minority nationality in Yunnan with special dietary habits) may achieve better results than Han Chinese donors for UC. This study aims to confirm this finding and understand why.

The investigators will recruit 200 UC patients (ages 18-60) and randomly assign them to two groups (100 each). One group will receive FMT from healthy Han donors; the other from healthy Dai donors. Patients will receive three FMT infusions via endoscopic intestinal tubing. Treatment effects will be assessed at 12 weeks using clinical scores (Mayo score), endoscopic scores (MES), inflammatory markers (fecal calprotectin, CRP, ESR), and intestinal barrier function tests.

Stool samples will also be analyzed using metabolomics and metagenomics to identify key gut bacteria and metabolites linked to better outcomes, and laboratory experiments will be performed to verify how they reduce intestinal inflammation.

The goal is to identify optimal donor characteristics for FMT in UC and uncover mechanisms that may lead to more personalized microbiota therapies.

Visão geral do estudo

Descrição detalhada

This randomized, parallel-group clinical study investigates the efficacy and mechanisms of fecal microbiota transplantation (FMT) using healthy donors from the Dai nationality versus Han nationality for treating ulcerative colitis (UC).

Background: UC is a chronic relapsing inflammatory bowel disease characterized by colonic mucosal inflammation. FMT has emerged as a promising therapeutic strategy by reconstructing intestinal microbiota. Preliminary findings indicate that FMT using donors from the Dai ethnic group in Yunnan Province (who have unique dietary and lifestyle habits) may achieve superior clinical remission compared to Han donors. This study aims to validate this observation and identify the core metabolites and key gut microbiota responsible for the enhanced efficacy.

Study Design: A total of 200 UC patients (aged 18-60 years, Mayo score 3-10, left-sided colitis) will be enrolled and randomly allocated into two groups (n=100 each): (1) FMT with healthy Han donors; (2) FMT with healthy Dai donors. Donors will be healthy individuals aged 18-23 years screened according to AGA guidelines.

Intervention: Patients will receive FMT via transendoscopic enteral tubing (TET) at 60 mL per infusion, once every 3 days for a total of 3 times.

Outcome Measures: Primary efficacy is clinical remission at week 12 (Mayo total score ≤2, no individual subscore >1, endoscopic subscore decreased by ≥1 from baseline). Secondary endpoints include Mayo score, MES, histopathology (HE staining), fecal calprotectin, CRP, ESR, and intestinal mucosal barrier function.

Mechanistic Investigations: Donor and recipient stool samples will be collected before FMT and at weeks 1 and 12 post-FMT. Metabolomics (LC-MS/MS, GC-MS) and metagenomic sequencing will identify differential metabolites and key bacterial taxa. Co-occurrence and metabolic complementarity networks will identify keystone species. Correlation analysis will reveal functional microbial groups. In vitro and in vivo experiments will validate the anti-inflammatory effects of identified key bacteria and metabolites.

Significance: This study will elucidate why Dai donors may confer superior FMT outcomes and identify transplantable microbial signatures and bioactive metabolites for UC therapy.

Tipo de estudo

Intervencional

Inscrição (Estimado)

200

Estágio

  • Fase 2

Contactos e Locais

Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.

Contato de estudo

Locais de estudo

    • Yunnan
      • Kunming, Yunnan, China, 650032
        • Recrutamento
        • Kunming Medical University First Affiliated Hospital
        • Contato:
          • Zihong Chen, MD
        • Investigador principal:
          • Yinglei Miao, MD

Critérios de participação

Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.

Critérios de elegibilidade

Idades elegíveis para estudo

  • Adulto

Aceita Voluntários Saudáveis

Não

Descrição

Inclusion Criteria:

  • Age 18-60 years
  • Diagnosed with ulcerative colitis (left-sided colitis) according to ECCO guidelines and Chinese Guidelines for the Diagnosis and Treatment of Ulcerative Colitis (2023 Xi'an)
  • Baseline Mayo score 3-10
  • Treated only with mesalazine before and during the study to exclude drug interference

Exclusion Criteria:

  • Pregnancy or planned pregnancy in the near future
  • Patients in clinical remission (Mayo score ≤2 with no individual subscore >1)
  • Development of diseases different from or confounding the initial diagnosis during the study
  • History of toxic megacolon, perianal disease, or intestinal surgery
  • Concurrent severe cardiac, pulmonary, or renal disease, or malignancy

Plano de estudo

Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.

Como o estudo é projetado?

Detalhes do projeto

  • Finalidade Principal: Tratamento
  • Alocação: Randomizado
  • Modelo Intervencional: Atribuição Paralela
  • Mascaramento: Nenhum (rótulo aberto)

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
Experimental: Han Donor FMT Group
Patients with ulcerative colitis (UC) receive fecal microbiota transplantation (FMT) from healthy Han donors aged 18-23 years. FMT is administered via transendoscopic enteral tubing (TET) at 60 mL per session, once every 3 days, for a total of 3 sessions. Only mesalazine is used before and after FMT to exclude drug interference. Clinical efficacy will be evaluated at 12 weeks post-FMT.
Donor stool (60 g) is processed using the CleanFMT method with GenFMTer system, including filtration, centrifugation, washing, and resuspension in sterile normal saline (1.5× volume). The final product is 200 mL fecal suspension, administered via TET at 60 mL per session, once every 3 days, for 3 sessions total.
Outros nomes:
  • FMT; Microbiota transfer
Experimental: Dai Donor FMT Group
Patients with ulcerative colitis (UC) receive fecal microbiota transplantation (FMT) from healthy Dai donors aged 18-23 years from Xishuangbanna, Yunnan. FMT is administered via transendoscopic enteral tubing (TET) at 60 mL per session, once every 3 days, for a total of 3 sessions. Only mesalazine is used before and after FMT to exclude drug interference. Clinical efficacy will be evaluated at 12 weeks post-FMT.
Donor stool (60 g) is processed using the CleanFMT method with GenFMTer system, including filtration, centrifugation, washing, and resuspension in sterile normal saline (1.5× volume). The final product is 200 mL fecal suspension, administered via TET at 60 mL per session, once every 3 days, for 3 sessions total.
Outros nomes:
  • FMT; Microbiota transfer

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
Rate of clinical and endoscopic remission at 12 weeks
Prazo: 12 weeks after the first FMT session
Proportion of ulcerative colitis patients achieving both clinical and endoscopic remission at 12 weeks after fecal microbiota transplantation (FMT) without corticosteroid use. Clinical remission is defined as a total Mayo score ≤2 with no individual subscore >1. Endoscopic improvement is defined as a decrease in the Mayo Endoscopic Subscore (MES) of at least 1 point from baseline. Patients must achieve both criteria simultaneously.
12 weeks after the first FMT session

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
Mayo Score
Prazo: Baseline (1 day pre-FMT), 1 week, and 12 weeks post-FMT
Change from baseline in total Mayo score (range 0-12, higher scores indicate more severe disease activity).
Baseline (1 day pre-FMT), 1 week, and 12 weeks post-FMT
Mayo Endoscopic Subscore (MES)
Prazo: Baseline and 12 weeks post-FMT
Change from baseline in MES (range 0-3, where 0=normal/remission, 1=mild, 2=moderate, 3=severe).
Baseline and 12 weeks post-FMT
Histopathological Assessment by HE Staining
Prazo: Baseline and 12 weeks post-FMT
Histological changes in colonic mucosal biopsies assessed by HE staining.
Baseline and 12 weeks post-FMT
Fecal Calprotectin
Prazo: Baseline, 1 week, and 12 weeks post-FMT
Change from baseline in fecal calprotectin levels as a marker of intestinal inflammation.
Baseline, 1 week, and 12 weeks post-FMT
C-Reactive Protein (CRP)
Prazo: Baseline, 1 week, and 12 weeks post-FMT
Change from baseline in serum CRP levels.
Baseline, 1 week, and 12 weeks post-FMT
Erythrocyte Sedimentation Rate (ESR)
Prazo: Baseline, 1 week, and 12 weeks post-FMT
Change from baseline in ESR.
Baseline, 1 week, and 12 weeks post-FMT
Intestinal Mucosal Barrier Function
Prazo: Baseline and 12 weeks post-FMT
Assessment of intestinal mucosal barrier function in UC patients after FMT.
Baseline and 12 weeks post-FMT

Colaboradores e Investigadores

É aqui que você encontrará pessoas e organizações envolvidas com este estudo.

Investigadores

  • Investigador principal: Yinglei Miao, MD, Kunming Medical University First Affiliated Hospital

Datas de registro do estudo

Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados ​​pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.

Datas Principais do Estudo

Início do estudo (Real)

3 de fevereiro de 2026

Conclusão Primária (Estimado)

31 de dezembro de 2029

Conclusão do estudo (Estimado)

31 de dezembro de 2029

Datas de inscrição no estudo

Enviado pela primeira vez

30 de agosto de 2026

Enviado pela primeira vez que atendeu aos critérios de CQ

5 de setembro de 2026

Primeira postagem (Real)

11 de setembro de 2026

Atualizações de registro de estudo

Última Atualização Postada (Real)

15 de setembro de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

11 de setembro de 2026

Última verificação

1 de setembro de 2026

Mais Informações

Termos relacionados a este estudo

Informações sobre medicamentos e dispositivos, documentos de estudo

Estuda um medicamento regulamentado pela FDA dos EUA

Não

Estuda um produto de dispositivo regulamentado pela FDA dos EUA

Não

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