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A Study to Compare Efficacy, Pharmacokinetics, Safety and Immunogenicity of MB04 [proposed Etanercept Biosimilar] to Enbrel® [EU-sourced] in Rheumatoid Arthritis

A Prospective, Randomized, Double-blind, Parallel-group Study to Compare the Efficacy, Safety, Pharmacokinetics and Immunogenicity of MB04 and EU-sourced Enbrel® in Patients with Moderate to Severe Rheumatoid Arthritis

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06596772
Enrollment
458
Registered
2024-09-19
Start date
2024-10-03
Completion date
2026-01-31
Last updated
2025-03-24

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Rheumatoid Arthritis (RA)

Keywords

Rheumatoid Arthritis

Brief summary

A study to compare efficacy, pharmacokinetics, safety and immunogenicity of MB04 \[proposed etanercept biosimilar\] to Enbrel® \[EU-sourced\] in rheumatoid arthritis

Detailed description

The study will randomize approximately 458 patients aged between 18 and 75 years with active Rheumatoid Arthritis despite methotrexate therapy. All patients shall receive methotrexate for ≥12 weeks and on a stable dose (10 to 25 mg/week) for ≥8 weeks prior to randomization, and folic acid (≥5 mg/week) from 4 weeks prior to screening until the end of the treatment period (Week 36). Screening evaluations will be completed within 28 days prior to randomization. There will be 2 periods in the study: Main Treatment period and Transition period. During the Main Treatment Period, eligible patients will be randomized, at a 1:1 ratio, to administer a 50 mg weekly dose of MB04 or EU- sourced Enbrel® subcutaneously (SC) using an Interactive Response System (IRT). After completing Week 24 assessment, patients will continue to receive the study treatment up to Week 36. Those patients who were originally assigned to EU-sourced Enbrel® will be randomized, at a 1:1 ratio, to receive either MB04 or EU-sourced Enbrel® SC, while patients originally assigned to MB04 will continue with the same treatment until Week 36. After treatment discontinuation, patients will undergo a Safety follow-up period for 4 weeks, up to week 40.

Interventions

DRUGMB04 (proposed biosimilar to etanercept)

MB04 50 mg/week via subcutaneous injection

Enbrel 50 mg/week via subcutaneous injection

Sponsors

mAbxience Research S.L.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Intervention model description

Parallel Assignment

Eligibility

Sex/Gender
ALL
Age
18 Years to 75 Years
Healthy volunteers
No

Inclusion criteria

Inclusion * Documented history of RA diagnosis consistent with the 2010 ACR/EULAR classification criteria ≥6 months prior to randomization (but not exceeding 15 years prior to screening). * Moderately to severe RA despite appropriate MTX at baseline therapy defined as having more than or equal to six swollen joints and more than or equal to six tender joints and either erythrocyte sedimentation rate (ESR, Westergren) ≥ 28 mm/h or serum C-reactive protein > 5.0 mg/dL and positive rheumatoid factor and/or CCP at screening * Stable dose MTX between 10 to 25 mg weekly during ≥12 weeks, since ≥8 weeks prior to randomization * Stable dose of NSAID and /or other analgesics for at least 4 weeks prior to randomization, when used * Stable dose ≤10 mg prednisone daily or equivalent for ≥4 weeks prior to randomization, when used * Patients who are otherwise medically stable according to investigator's discretion * Agree to use highly effective contraceptive methods up to 6 months after las dose Exclusion * Previously treated with any biologic or targeted synthetic DMARD * Previously treated with any monoclonal antibody for other condition than RA * Hypersensitivity to any component of study drug and/or prefilled syringe components * Arthritis with onset prior to age 16 years or current diagnosis of inflammatory joint disease other than RA * Systemic manifestations of RA other that rheumatoid nodules or secondary Sjogren's syndrome * Active infection or potentially relapsing infections that could have a severe outcome. Latent tuberculosis infection detected during screening should start an approved treatment regimen according to standard of care and rescreened * Solid or hematologic malignancy within the past 5 years * Pregnant and breastfeeding women * Any medical condition in the opinion of the investigator that would be a risk for safety, cooperation in the study or interferes with the interpretation of the study results

Design outcomes

Primary

MeasureTime frame
American College of Rheumatology 20% Response Criteria (ACR20)Week 24

Secondary

MeasureTime frame
American College of Rheumatology 70% Response Criteria (ACR70)Weeks 24 and 36
ACR20Weeks 36
American College of Rheumatology 50% Response Criteria (ACR50)Weeks 24 and 36

Countries

Bulgaria, Georgia, Moldova, Poland, Romania, Serbia

Contacts

Primary ContactSusana Millan, PhD
Susana.Millan@mabxience.com+34-917-711-500
Backup ContactAmalia Flórez
amalia.florez@mabxience.com+34-917-711-500

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026