Clinical trial Recruiting at 14 sites Phase 3 Interventional Ages 8 to 18

Filgotinib for children with polyarticular juvenile idiopathic arthritis

Official title: Multicenter, Open-label Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Efficacy of Filgotinib in Children and Adolescents From 8 Years to Less Than 18 Years of Age With Polyarticular-course Juvenile Idiopathic Arthritis

Run by Alfasigma S.p.A. · NCT07554495 · Data updated 2026-11-12

This study tests whether and how filgotinib works and is tolerated in children and adolescents with active polyarticular JIA over about 18 weeks.

Quick facts

PhasePhase 3
Study typeInterventional
Ages8 Years to 18 Years
SexAll
Enrollment65 (estimated)
SponsorAlfasigma S.p.A.
Industry-sponsored
Drugs / interventionsmethotrexate, filgotinib
Locations14 sites (Leuven and 13 other locations)
StatusRecruiting
StartedMay 21, 2026
Main results expectedJune 2027
Study endsJune 2027
Registry record updatedJune 12, 2026
Trial IDNCT07554495 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Children and adolescents aged 8 to under 18 with moderately to severely active polyarticular JIA not adequately controlled by current therapy.

Probably not a fit

Patients whose disease does not respond to filgotinib or who experience intolerable adverse effects may not benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a multicenter Phase 3, open-label, single-arm trial evaluating safety, tolerability, pharmacokinetics, and efficacy of oral filgotinib in pediatric patients aged 8 to under 18 with moderately to severely active polyarticular JIA. Eligible participants may have extended oligoarthritis, RF-positive or RF-negative polyarthritis, psoriatic arthritis, or enthesitis-related arthritis and must have inadequate response to current therapy. The study involves up to 18 weeks of filgotinib treatment and will monitor safety and PK alongside clinical response. It is sponsored by Alfasigma S.p.A. with participating centers in Leuven, Prague, and Paris regions.

Why it matters

Potential benefit: If successful, participants may experience improvement in arthritis symptoms and better disease control with a tolerable safety profile.

How similar studies have gone: While pediatric data for filgotinib are limited, adult and some pediatric JIA studies with JAK inhibitors have shown meaningful improvements in disease activity in similar populations.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Subject and/or parent/legal guardian must be able and willing to comply with the clinical study protocol requirements and must sign and date the ICF and assent (if required per local regulation) as approved by the Independent Ethics Committee / Institutional Review Board, prior to any screening evaluations.
* Female or male subject 8 to \<18 years of age, on the date of signing the informed consent and assent (per local regulation) form.
* Subject must meet the ILAR classification and have moderately to severely active disease for one of the following categories that is not adequately controlled with his/her current therapy (see Protocol Appendix 1 for disease activity assessment criteria):

  * Extended oligoarthritis (i.e. affecting a total of more than 4 joints after the first 6 months of disease)
  * RF-positive polyarthritis
  * RF-negative polyarthritis
  * PsA
  * ERA
* Subject with intolerance or a history of inadequate response to at least one of the following medications for the treatment of pJIA, administered for at least 3 months, based on current treatment guidelines: conventional synthetic disease modifying anti rheumatic drugs (csDMARDs; including methotrexate) and/or biologic disease modifying anti-rheumatic drugs (bDMARDs) administered per local label, and/or non steroidal anti-inflammatory drugs for ERA and PsA subtypes.
* Female subject of childbearing potential who is sexually active and at risk for pregnancy must agree to use contraception/preventive exposure measures as described in the protocol.

Exclusion Criteria:

* Subject with a body weight \<15 kg.
* Subject with persistent oligoarthritis (i.e. affecting not more than 4 joints throughout the disease course).
* Subject with undifferentiated arthritis.
* Subject with anterior uveitis (active or uncontrolled) ≤12 weeks prior to baseline.
* Subject with systemic JIA.
* Subject with any other rheumatic disease, inflammatory, or immunologic disease (e.g. inflammatory bowel disease, hypogammaglobulinemia, or systemic lupus erythematosus).
* Subject has any condition or circumstances (including abnormalities in laboratory parameters) that, in the opinion of the investigator, may make a subject unlikely or unable to complete the study or comply with study procedures and requirements.
* Subject has an active infection. • Subject with a history of complicated herpes zoster infection (with multi dermatomal, disseminated, ophthalmic, or central nervous system involvement).

Where it's running

  • UZ Leuven
    Leuven, Belgium
    Recruiting
  • Vseobecna fakultni nemocnice v Praze
    Prague, Czechia
    Recruiting
  • Hôpital Bicêtre
    Le Kremlin-Bicêtre, France
    Recruiting
  • Charité - Campus Virchow-Klinikum
    Berlin, Germany
    Recruiting
  • Hamburger Zentrum fuer Kinder und Jugendrheumatologie
    Hamburg, Germany
    Recruiting
  • Pecsi Tudomanyegyetem Klinikai Kozpont
    Pécs, Hungary
    Recruiting
Show 8 more locations
  • Istituto Giannina Gaslini-Ospedale Pediatrico IRCCS
    Genova, Italy
    Recruiting
  • Centrum Medyczne Hipokrates S C Elzbieta I Grzegorz Grzesk
    Bydgoszcz, Poland
    Recruiting
  • MICS Centrum Medyczne Torun
    Torun, Poland
    Recruiting
  • ETG JustMed
    Warsaw, Poland
    Recruiting
  • Hospital Sant Joan de Deu
    Barcelona, Spain
    Recruiting
  • Bristol Royal Hospital for Children
    Bristol, United Kingdom
    Recruiting
  • Leicester Royal Infirmary
    Leicester, United Kingdom
    Recruiting
  • Nottingham University Hospitals Queen's Medical Centre
    Nottingham, United Kingdom
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.