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Study identifier: NCT06609447 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

The Efficacy and Safety of Combining Probiotic VSL#3 With Vedolizumab for the Treatment of Moderate Ulcerative Colitis

Condition: Ulcerative Colitis  ·  Sponsor: Second Affiliated Hospital, School of Medicine, Zhejiang University

PhasePhase 4
Planned participants100
Who can joinAll sexes, 18 Years to 85 Years
Healthy volunteersNo

About this study

An imbalance in the gut microbiota and mucosal immune dysfunction leading to intestinal inflammation are central to the pathogenesis of ulcerative colitis (UC). Both international and domestic inflammatory bowel disease (IBD) guidelines consistently recommend the use of the probiotic VSL#3 for inducing or maintaining remission in cases of mild-to-moderate UC. While the development of biologic therapies in recent years has provided new directions for IBD treatment, classic biologics such as infliximab may increase the risk of opportunistic infections and malignancies. Vedolizumab, when used for the induction therapy of UC, has a response rate of less than 80%, a slightly slower onset of action, and a slight increase in Clostridioides difficile infection (CDI) incidence. Currently, there is a lack of clinical data on the adjunctive use of VSL#3 with biologic agents in the treatment of UC globally. Therefore, this project aims to design a multi-center, randomized, placebo-controlled, double-blind study. The primary objective is to compare the changes in clinical response in patients with moderately active UC treated with either VSL#3 or placebo in combination with vedolizumab (VDZ) for six weeks.

This description comes directly from the study's public registry record.

Talk to the study team

Yan Chen, PhD  ·  chenyan72_72@zju.edu.cn

Qiao Yu, PhD  ·  +86 13456820567  ·  yuqiao@zju.edu.cn

Always discuss trial participation with your own doctor first.

Locations (12)

The Seventh Medical Center, PLA General HospitalBeijing, Beijing Municipality, ChinaNot Yet Recruiting
Chongqing General HospitalChongqing, Chongqing Municipality, ChinaRecruiting
The Sixth Affiliated Hospital, Sun Yat-sen UniversityGuangzhou, Guangdong, ChinaNot Yet Recruiting
Renmin Hospital of Wuhan UniversityWuhan, Hubei, ChinaRecruiting
The Second Affiliated Hospital of Xi'an Jiaotong UniversityXi’an, Shanxi, ChinaNot Yet Recruiting
West China Hospital of Sichuan UniversityChengdu, Sichuan, ChinaNot Yet Recruiting
Zhejiang Provincial Hospital of Traditional Chinese MedicineHangzhou, Zhejiang, ChinaRecruiting
2nd Affiliated Hospital, Zhejiang University School of MedicineHangzhou, Zhejiang, ChinaNot Yet Recruiting
Huzhou City Central HospitalHuzhou, Zhejiang, ChinaNot Yet Recruiting
Jinhua City Central HospitalJinhua, Zhejiang, ChinaNot Yet Recruiting
Quzhou City People's HospitalQuzhou, Zhejiang, ChinaNot Yet Recruiting
The Second Affiliated Hospital, Wenzhou Medical UniversityWenzhou, Zhejiang, ChinaNot Yet Recruiting

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Source record: clinicaltrials.gov/study/NCT06609447