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Trial details imported from ClinicalTrials.gov

For full trial details, please see the original record at https://clinicaltrials.gov/study/NCT06237452




Registration number
NCT06237452
Ethics application status
Date submitted
23/01/2024
Date registered
1/02/2024
Date last updated
9/07/2025

Titles & IDs
Public title
VE303 for Prevention of Recurrent Clostridioides Difficile Infection
Scientific title
A Randomized, Double-Blind, Placebo-Controlled Phase 3 Study of VE303 for Prevention of Recurrent Clostridioides Difficile Infection
Secondary ID [1] 0 0
VE303-003
Universal Trial Number (UTN)
Trial acronym
RESTORATiVE303
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Clostridium Difficile 0 0
Clostridium Difficile Infections 0 0
Clostridium Difficile Infection Recurrence 0 0
Clostridioides Difficile Infection 0 0
Clostridioides Difficile Infection Recurrence 0 0
CDI 0 0
C. Diff Infection 0 0
Recurrent Clostridium Difficile Infection 0 0
C.Difficile Diarrhea 0 0
Diarrhea Infectious 0 0
Condition category
Condition code
Infection 0 0 0 0
Studies of infection and infectious agents
Infection 0 0 0 0
Other infectious diseases
Infection 0 0 0 0
Sexually transmitted infections
Oral and Gastrointestinal 0 0 0 0
Other diseases of the mouth, teeth, oesophagus, digestive system including liver and colon
Other 0 0 0 0
Research that is not of generic health relevance and not applicable to specific health categories listed above

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
Treatment: Other - VE303
Treatment: Other - Placebo

Experimental: VE303 - Subjects assigned to the VE303 arm will take 3 capsules containing VE303 per day for 14 days after completing 10 to 21 days of standard of care antibiotic treatment for the qualifying CDI episode.

Placebo comparator: Placebo - Subjects assigned to the placebo arm will take 3 placebo capsules per day for 14 days after completing 10 to 21 days of standard of care antibiotic treatment for the qualifying CDI episode.


Treatment: Other: VE303
VE303 is a live biotherapeutic product (LBP) consisting of 8 clonally derived, nonpathogenic, nontoxigenic, commensal bacteria strains manufactured under Good Manufacturing Practices (GMP) conditions.

Treatment: Other: Placebo
Placebo capsules contain microcrystalline cellulose. Placebo capsules are visually identical to and not discernible from VE303 capsules. Placebo capsules will not contain any VE303 drug product.
Intervention code [1] 0 0
Treatment: Other
Comparator / control treatment
Control group

Outcomes
Primary outcome [1] 0 0
CDI Recurrence Rate at Week 8
Timepoint [1] 0 0
8 weeks

Eligibility
Key inclusion criteria
Key Inclusion Criteria (For enrollment in Stage 1: recurrent CDI population):

* Age = 12 years where permitted, and = 18 years in other locations, with a laboratory-confirmed qualifying episode of CDI and at least 1 prior occurrence within the last 6 months

Key Inclusion Criteria (For enrollment in Stage 2: primary CDI with high-risk for recurrence population):

* Age = 75 years with a laboratory-confirmed qualifying episode of CDI
* OR age = 12 years where permitted, and = 18 years in other locations, with least two of the following risk factors:

1. Age = 65 years
2. Kidney dysfunction, defined as estimated creatinine clearance < 60 mL/min/1.73 m^2 at the time of the qualifying CDI episode
3. History of regular use of a proton pump inhibitor (PPI) within the past 2 months and expectation of continued use of PPIs throughout the study
4. History of a prior CDI episode between 6 and 12 months prior to enrollment
5. Immunosuppression due to an underlying disease or its treatment
6. Has undergone solid organ or hematopoietic stem cell transplantation

Key Inclusion Criteria (For enrollment in Stage 1 or 2):

* The qualifying episode of CDI must meet all the following criteria:

1. New onset of = 3 unformed bowel movements (ie, Types 5 to 7 on the Bristol stool scale) within 24 hours for 2 consecutive days
2. CDI symptoms started within 4 weeks prior to initiation of standard of care (SoC) antibiotic therapy for CDI
3. Stool sample collected before (or no later than 72 hours after) initiation of SoC antibiotic therapy that was positive in a CDI laboratory test, defined as enzyme immunoassay (EIA) for toxin A/B and glutamate dehydrogenase (GDH) with polymerase chain reaction (PCR) reflex testing for discordant EIA/GDH results, performed at either a local laboratory or the central laboratory
4. Diarrhea considered unlikely to have another etiology
* Prior to receiving any study medication, the participant should:

1. Receive and complete a course of SoC antibiotic therapy for at least 10 days, up to a maximum of 28 days (Note: choice of agent is at the physician's discretion and antibiotic tapering is not allowed). It is permissible for decentralized participants to be randomized during SoC antibiotic administration.
2. Meet the criterion of a successful clinical response, defined attaining symptomatic control of the qualifying CDI episode, ie, < 3 loose/unformed bowel movements per 24 hours for at least 2 consecutive days
* Able to receive the first dose of study drug on the last planned day of SoC antibiotic administration for a qualifying CDI episode, or no later than 2 days after completion of antibiotic dosing
* Recovered from any complications of severe or fulminant CDI and be clinically stable by the time of randomization

Key
Minimum age
12 Years
Maximum age
No limit
Sex
Both males and females
Can healthy volunteers participate?
No
Key exclusion criteria
Exclusion Criteria (For both Stage 1 and Stage 2):

* History of chronic diarrhea (defined as = 3 loose stools per day lasting for at least 4 weeks) within 3 months prior to randomization that is not related to CDI
* Known or suspected toxic megacolon or small bowel ileus at the time of randomization
* History of confirmed celiac disease, inflammatory bowel disease, microscopic colitis, short gut, GI tract fistulas, or a recent episode (within 6 months of screening) of intestinal ischemia or ischemic colitis
* Receipt of bezlotoxumab during the course of SoC antibiotic treatment for the qualifying CDI episode
* Use of antidiarrheal drugs (eg, loperamide, diphenoxylate) within 3 days prior to the planned first dose of study drug
* Anticipated administration of oral or parenteral antibacterial therapy for a non-CDI indication after randomization through Week 24 (end of study)
* Probiotics, whether characterized as a dietary/food supplement, or a drug, are prohibited within 2 days before starting study drug and through the dosing period. (Note: consumption of food-based products such as yogurt, kombucha, and kefir are permitted.)
* Absolute neutrophil count (ANC) of < 0.5 ×10^9 cells/L on 2 consecutive occasions within 7 days prior to randomization, or sustained ANC < 1.0 × 10^9 cells/L

Study design
Purpose of the study
Prevention
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?
The people receiving the treatment/s
The people administering the treatment/s
The people assessing the outcomes
The people analysing the results/data
Intervention assignment
Parallel
Other design features
Phase
Phase 3
Type of endpoint/s
Statistical methods / analysis

Recruitment
Recruitment status
Recruiting
Data analysis
Reason for early stopping/withdrawal
Other reasons
Date of first participant enrolment
Anticipated
Actual
20/05/2024
Date of last participant enrolment
Anticipated
Actual
Date of last data collection
Anticipated
1/10/2027
Actual
Sample size
Target
852
Accrual to date
Final
Recruitment in Australia
Recruitment state(s)
NSW,VIC
Recruitment hospital [1] 0 0
Concord Repatriation General Hospital - Concord
Recruitment hospital [2] 0 0
Westmead Hospital - Westmead
Recruitment hospital [3] 0 0
Monash Health - Clayton
Recruitment hospital [4] 0 0
Melbourne Health - Parkville
Recruitment postcode(s) [1] 0 0
2139 - Concord
Recruitment postcode(s) [2] 0 0
2148 - Westmead
Recruitment postcode(s) [3] 0 0
3168 - Clayton
Recruitment postcode(s) [4] 0 0
3050 - Parkville
Recruitment outside Australia
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Funding & Sponsors
Primary sponsor type
Commercial sector/industry
Name
Vedanta Biosciences, Inc.
Address
Country

Ethics approval
Ethics application status

Summary
Brief summary
Trial website
Trial related presentations / publications
Public notes

Contacts
Principal investigator
Name 0 0
Address 0 0
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for public queries
Name 0 0
Mary Garfield
Address 0 0
Country 0 0
Phone 0 0
857-706-1427
Fax 0 0
Email 0 0
[email protected]
Contact person for scientific queries

Data sharing statement


What supporting documents are/will be available?

No Supporting Document Provided


Results publications and other study-related documents

No documents have been uploaded by study researchers.

Results not provided in https://clinicaltrials.gov/study/NCT06237452