Optimal Care With Guselkumab in Crohn's Disease / OPTIM Study A Prospective Open Label Interventional, Multicenter Study

Recruiting now · Phase 4

Conditions studied: Crohn Disease (CD), Intensification

In brief

Crohn's disease (CD) is a chronic and destructive inflammatory disease of the gastrointestinal tract characterized by phases of relapse and remission. Tumor necrosis factor (TNF) antagonists, anti-integrins and anti-interleukin (IL) 12/23 are the main therapeutic agents to obtain deep remission and prevent disability. Despite the significant advances these biologics represent in treating inflammatory bowel disease (IBD), many patients experience suboptimal responses, including primary non-response or a loss of effectiveness over time, often leading to treatment discontinuation. For all these medications, a dose-response relationship has been demonstrated and an increase in dose or dosing frequency is recommended. Dose escalation is now an essential therapeutic approach necessary in 30 to 50% of CD patients treated with biologics. This strategy, supported by international guidelines, allows for long-term efficacy to be maintained without compromising safety. Guselkumab (GUS) is a monoclonal antibody targeting the p19 subunit of IL-23. In a recent phase III trial (GALAXI), GUS demonstrated superiority of both subcutaneous (SC) maintenance doses (200 mg every 4 weeks \[q4w\] and 100 mg every 8 weeks \[q8w\]) compared to placebo and ustekinumab. In the GALAXI phase III program, at least 30% of patients did not achieve clinical response after a 12-week intravenous induction, and almost 20% experienced a loss of response by week 44. In these patients, the benefit of an intensified dose of GUS (200 mg q4w) maintenance remains to be determined to guide clinicians in optimizing its use in clinical practice. The investigator aimed to evaluate the one-year effectiveness of GUS in CD in real-world settings and under optimal conditions allowing dose intensification.

Key facts

Study ID: NCT07616687
Run by: Groupe d'Etude Therapeutique des Affections Inflammatoires Digestives
People needed: 210
Starts: 2026-06-18
Expected to finish: 2029-03-15
Last updated by the study team: 2026-06-30

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

- Patients with a diagnosis of CD according to ECCO guidelines,
18 years of age or older at the time of informed consent,
Absence of contraindication to guselkumab,
Active disease according to PRO2 (abdominal pain > 1 or stool frequency > 3), and faecal calprotectin > 250 ug/g,
Objective active disease documented within ≤ 2 months by endoscopy or by MRI when not contraindicated, orby IUS),
Not currently participating in any interventional research.
Patient naïve or exposed to one or more advanced therapy, in accordance with the approved indication for guselkumab in Crohn's disease.
Females of childbearing potential must have a negative serum pregnancy test at the baseline Visit.

You may not qualify if…

- Patient under legal protection,
Previous exposure to an anti-IL23
Combination of advanced therapy with GUS,
Patient with ostomy,
Pregnant or breastfeeding woman,
Patient with perianal CD predominant disease.
Active clinically significant infection or HIV, Hep B, Hep C, or active tuberculosis

Where it is running

Chu Amiens Picardie — Amiens, France (enrolling)

Full record on ClinicalTrials.gov

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