A Phase 2/3, Randomized, Double-blind, Placebo- and Active-controlled, Parallel-group, Multicenter Protocol to Evaluate the Efficacy and Safety of Guselkumab in Participants With Moderately to Severely Active Crohn's Disease (GALAXI)

  • End date
    Oct 15, 2030
  • participants needed
  • sponsor
    Janssen Research & Development, LLC
Updated on 27 October 2022
abdominal pain
crohn's disease
fistulising crohn's disease


The purpose of this study is to evaluate the clinical efficacy (GALAXI 1), clinical and endoscopic efficacy (GALAXI 2 and GALAXI 3) and safety of guselkumab in participants with Crohn's disease.


This program consists of 3 separate studies: a 48-week Phase 2 dose-ranging study (GALAXI 1) and two 48-week Phase 3 confirmatory studies (GALAXI 2 and GALAXI 3). In Phase 2, safety and efficacy of guselkumab dose regimens will be evaluated to support the selection of induction and maintenance dose regimens for confirmatory evaluation in Phase 3. Participants who complete the 48-week Phase 2 or Phase 3 studies may be eligible to enter the long term extension (LTE). Throughout the 3 studies, efficacy, pharmacokinetic, biomarkers, and safety will be assessed.

Condition Crohn's Disease
Treatment Placebo, Guselkumab, ustekinumab, Guselkumab Dose 1, Guselkumab Dose 2, Guselkumab Dose 3, Guselkumab Dose 4, Guselkumab Dose 5
Clinical Study IdentifierNCT03466411
SponsorJanssen Research & Development, LLC
Last Modified on27 October 2022


Yes No Not Sure

Inclusion Criteria

Have Crohn's disease (CD) or fistulizing Crohn's disease of at least 3 months duration (defined as a minimum of 12 weeks), with colitis, ileitis, or ileocolitis, confirmed at any time in the past by radiography, histology, and/or endoscopy
Have moderate to severe CD as assessed by CDAI, stool frequency (SF), and abdominal pain (AP) scores, and Simple Endoscopic Score for Crohn's Disease (SES-CD)
Have screening laboratory test results within the protocol specified parameters
A female participant of childbearing potential must have a negative urine pregnancy test result at screening and baseline
Demonstrated intolerance or inadequate response to conventional or to biologic therapy for CD

Exclusion Criteria

Current diagnosis of ulcerative colitis or indeterminate colitis
Has complications of Crohn's disease, such as symptomatic strictures or stenoses, short gut syndrome, or any other manifestation
Unstable doses of concomitant Crohn's disease therapy
Receipt of Crohn's disease approved biologic agents, investigational agents, or procedures outside of permitted timeframe as specified in the protocol
Any medical contraindications preventing study participation
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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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