An Open-label Study to Evaluate the Pharmacokinetics and Safety of Bimekizumab in Pediatric Study Participants With Active Juvenile Idiopathic Arthritis Subtypes Enthesitis-related Arthritis (Including Juvenile-onset Ankylosing Spondylitis) and Juvenile Psoriatic Arthritis

NCT ID: NCT06668181

Last Updated: 2026-01-16

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

PHASE3

Total Enrollment

40 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-03-11

Study Completion Date

2030-07-31

Brief Summary

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The purpose of this study is to assess plasma bimekizumab concentrations following subcutaneous (sc) bimekizumab administration.

Detailed Description

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Conditions

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Enthesitis-related Arthritis Juvenile Psoriatic Arthritis

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Bimekizumab

Study participants will receive a bimekizumab dose which is dependent on their weight.

Group Type EXPERIMENTAL

Bimekizumab

Intervention Type DRUG

Bimekizumab will be administered at pre-specified timepoints.

Interventions

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Bimekizumab

Bimekizumab will be administered at pre-specified timepoints.

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* Study participant must be 2 to \<18 years of age inclusive, at the Baseline Visit.
* Study participants who have confirmed diagnosis of enthesitis-related arthritis (ERA; including juvenile-onset ankylosing spondylitis (JAS)) and/or juvenile psoriatic arthritis (JPsA) according to the juvenile-International League of Associations for Rheumatology (JIA-ILAR) classification criteria of at least 3 months duration prior to the Screening Visit.
* Study participants who have active disease (ERA \[including JAS\] and/or JPsA) defined as having at least 3 active joints, each of which needs to be included in the joints assessed in the JADAS27, and for ERA at least 1 site of enthesitis at Baseline or documented by history.
* Study participants with inadequate response (at least 1 month) or intolerance to at least 1 nonsteroidal anti-inflammatory drug (NSAID).
* Study participants taking concomitant methotrexate or sulfasalazine are allowed to continue the medication if it has been used for the past 12 weeks with a stable dose for the 4 weeks prior to Baseline, with no change in dose for the first 16 weeks of treatment foreseen. (Note: prior or concomitant use of methotrexate or sulfasalazine is NOT required for study participation.)
* Study participants with no concomitant use of second line agents such as disease-modifying and/or immunosuppressive drugs with the exception of methotrexate or sulfasalazine.
* Body weight of ≥10kg.
* Male and female.
* A female study participant will be eligible to participate if she is not pregnant, not breastfeeding, and at least 1 of the following conditions applies:

1. Not a woman of childbearing potential (WOCBP) OR
2. A WOCBP who agrees to follow the contraceptive guidance during the Initial Treatment Period, the Open-label Extension (OLE) Period, and for at least 20 weeks after the final dose of investigational medicinal product (IMP; ie, the Safety Follow-up (SFU) Period)
* Capable of giving/having parent(s) or legal representative provide signed informed consent/assent (where appropriate), which includes compliance with the requirements and restrictions listed in the Informed Consent Form (ICF) and assent and in this protocol.

Exclusion Criteria

* Study participants fulfilling any International League of Associations for Rheumatology (ILAR) diagnostic juvenile idiopathic arthritis (JIA) category other than enthesitis-related arthritis (ERA; including juvenile-onset ankylosing spondylitis (JAS)) and/or juvenile psoriatic arthritis (JPsA).
* Study participant has history of inflammatory bowel disease (IBD) or signs/symptoms suggestive of IBD.
* Study participant has active uncontrolled uveitis.
* Study participant has history of active tuberculosis (TB) unless successfully treated, latent TB unless prophylactically treated.
* Study participant has had major surgery (including joint surgery) within the 3 months prior to the Baseline Visit or has planned major surgery within 6 months after entering the study.
* Study participant has laboratory abnormalities at Screening defined in the Protocol.
* Study participant has an active infection or history of infections (such as serious infection, chronic infections, opportunistic infections, unusually severe infections).
* Study participant has received drugs listed in the protocol outside the specified timeframes relative to the Baseline Visit or receives prohibited concomitant treatments.
* Study participant had previous therapy with bimekizumab or prior treatment with other IL-17 biologic response modifier.
* Study participant had prior treatment with more than one biologic response modifier (other than an IL-17).
* Presence of active suicidal ideation, or positive suicide behavior.
* Study participant has been diagnosed with severe depression in the past 6 months.
Minimum Eligible Age

2 Years

Maximum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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UCB Biopharma SRL

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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UCB Cares

Role: STUDY_DIRECTOR

001 844 599 2273

Locations

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Ja0005 50646

Calgary, , Canada

Site Status RECRUITING

Ja0005 50644

Montreal, , Canada

Site Status RECRUITING

Ja0005 50645

Saskatoon, , Canada

Site Status RECRUITING

Ja0005 40777

Indre-et-Loire, , France

Site Status RECRUITING

Ja0005 40510

Le Kremlin-Bicêtre, , France

Site Status RECRUITING

Ja0005 40778

Paris, , France

Site Status RECRUITING

Ja0005 40776

Poitiers, , France

Site Status RECRUITING

Ja0005 40369

Berlin, , Germany

Site Status RECRUITING

Ja0005 40356

Dresden, , Germany

Site Status RECRUITING

Ja0005 40072

Freiburg im Breisgau, , Germany

Site Status ACTIVE_NOT_RECRUITING

Ja0005 40852

Hamburg, , Germany

Site Status RECRUITING

Ja0005 40787

Sankt Augustin, , Germany

Site Status RECRUITING

Ja0005 40779

Sendenhorst, , Germany

Site Status ACTIVE_NOT_RECRUITING

Ja0005 40427

Tübingen, , Germany

Site Status RECRUITING

Ja0005 40720

Krakow, , Poland

Site Status RECRUITING

Ja0005 40780

Sosnowiec, , Poland

Site Status ACTIVE_NOT_RECRUITING

Ja0005 40781

Esplugues de Llobregat, , Spain

Site Status RECRUITING

Ja0005 40100

Madrid, , Spain

Site Status RECRUITING

Ja0005 40782

Valencia, , Spain

Site Status ACTIVE_NOT_RECRUITING

Ja0005 40786

Bristol, , United Kingdom

Site Status ACTIVE_NOT_RECRUITING

Ja0005 40783

Manchester, , United Kingdom

Site Status RECRUITING

Ja0005 40785

Nottingham, , United Kingdom

Site Status RECRUITING

Ja0005 40784

Stroke-on-trent, , United Kingdom

Site Status ACTIVE_NOT_RECRUITING

Countries

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Canada France Germany Poland Spain United Kingdom

Central Contacts

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UCB Cares

Role: CONTACT

+18445992273

UCB Cares

Role: CONTACT

001 844 599 2273

Other Identifiers

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U1111-1305-2292

Identifier Type: OTHER

Identifier Source: secondary_id

2023-508845-41

Identifier Type: REGISTRY

Identifier Source: secondary_id

JA0005

Identifier Type: -

Identifier Source: org_study_id

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