New hope for IBD patients: switching to guselkumab after ustekinumab fails
NCT ID NCT07245394
First seen Jun 25, 2026 · Last updated Sep 01, 2026 · Updated 5 times
Summary
This Canadian study is testing whether switching to the drug guselkumab (Tremfya) can help people with inflammatory bowel disease (IBD) who didn't respond well enough to ustekinumab. Researchers will track symptoms, test results, and overall health in 200 participants over one year. The goal is to see if this switch can lead to better disease control without worsening endoscopic findings.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Guselkumab (Tremfya)
- What this could lead to
- If successful, this could show that switching to guselkumab is a good option for people with IBD who didn't get enough relief from ustekinumab, offering better symptom control.
- What could go wrong
- This is an observational study, not a controlled trial, so results may be less definitive. It's also relatively small (200 people) and only follows participants for one year, so long-term benefits or risks are unknown.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 200 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jan 2026
- Expected to finish
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Nov 2028
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
IBD patients who had inadequate response to ustekinumab and switched therapy to guselkumab.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Subjects of any gender aged ≥ 18. * Confirmed diagnosis of IBD (CD, UC, or IBDU) for at least 6 months prior to baseline visit. Subjects with IBDU will be grouped with subjects with UC. The CD proportion of patients will be capped at 75%. * Subjects have received ustekinumab for at least 14 weeks and who are currently on or recently discontinued ustekinumab therapy. * For subjects that have recently discontinued ustekinumab, the last dose of ustekinumab must have been within 12 weeks before Week 0, and no other advanced therapy (i.e., infliximab, adalimumab, golimumab, certolizumab pegol, vedolizumab, natalizumab, risankizumab, mirikizumab, tofacitinib, upadacitinib, ozanimod, etrasimod) was started since stopping ustekinumab. * Subjects with an inadequate response to ustekinumab who require a change in advanced therapy and are initiating guselkumab, as determined by the treating physician. * For subjects on off-label ustekinumab dosing (90 mg every 4 or 6 weeks (off-label dosing), enrollment will be capped at 60%. * Ability and willingness to give written informed consent and comply with the requirements of this study protocol. * Subjects who have evidence of ongoing endoscopic evidence of disease activity within 3 months prior to Week 0, defined as: * For Crohn's Disease: Colonoscopy showing SES-CD score (excluding the presence of narrowing component) of ≥6 (or ≥4 for participants with isolated ileal disease), OR presence of ulcers larger than 5 mm in any segment. * For Ulcerative Colitis: Colonoscopy showing Ulcerative Colitis Endoscopic Index of Severity (UCEIS) score ≥4, OR presence of erosions or ulcers in any segment. Exclusion Criteria: * History of prior exposure to any anti-p19 inhibitor (risankizumab or mirikizumab). * Subjects with formal contraindication to guselkumab per the drug label. * Use of guselkumab for an off-label indication, dosing regimen, or route of administration. Subjects who did not receive guselkumab induction will be excluded. * Subjects with an ostomy or ileo-anal pouch. * Subjects with a history of bowel surgery within 6 months prior to Week 0. * Subjects displaying clinical signs of acute severe UC, fulminant colitis or toxic megacolon within 3 months prior to Week 0. * Subjects who are expected to require bowel surgery by their IBD physician within the year of enrollment. * Subjects on 1 or more concomitant biologics. * Subjects with a history of colonic dysplasia (low-grade dysplasia, high-grade dysplasia, or colorectal cancer). Note: Patients with a history of indefinite for dysplasia would be eligible. * Subjects with formal contraindication or unwilling to undergo lower endoscopy. * The patient is considered by the Investigator, for any reason, to be an unsuitable candidate for the study.
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Genom att skicka in godkänner du våra Användarvillkor
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The study's own enquiry address
This study publishes an address for enquiries. See it below .
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The places running it
14 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Show contact details
Enter your email to view the contact information for this study.
Genom att skicka in godkänner du våra Användarvillkor
Locations
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Abp Research Services Corporation
RECRUITINGOakville, Ontario, L6L 5L7, Canada
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Barrie GI Associates
RECRUITINGBarrie, Ontario, L4M 7G1, Canada
Contact Email: •••••@•••••
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Brampton Gastroenterology Research Group Inc
RECRUITINGBrampton, Ontario, L6S 0C1, Canada
Contact Email: •••••@•••••
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CIUSSS l'Est-de-l'Île-de-Montréal
NOT_YET_RECRUITINGMontreal, Quebec, H1T 2M4, Canada
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Centre Hospitalier de l'Université de Montréal (CHUM)
RECRUITINGMontreal, Quebec, Canada
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GNRR Digestive Clinics and Research Center Inc.
RECRUITINGBrampton, Ontario, L6S 0E2, Canada
Contact Email: •••••@•••••
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Hamilton Health Sciences Corporation
NOT_YET_RECRUITINGHamilton, Ontaio, L8L 2X2, Canada
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LDDI Clinical Trials Inc. dba London Digestive Disease Institute
RECRUITINGLondon, Ontario, N6K 1M6, Canada
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MA MacMillan
RECRUITINGFredericton, New Brunswick, E3B 1J5, Canada
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Taunton Surgical Center
RECRUITINGOshawa, Ontario, L1J 0C7, Canada
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The Research Institute of the McGill University Health Centre
RECRUITINGMontreal, Quebec, H3G 1A4, Canada
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Toronto Immune and Digestive Health Institute
RECRUITINGToronto, Ontario, M6A3B4, Canada
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University of Calgary
RECRUITINGCalgary, Alberta, T2N 4Z6, Canada
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West Gta Research Inc.
RECRUITINGMississauga, Ontario, L5M 2S4, Canada
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