Spondyloarthritis & psoriatic arthritis

Efficacy and safety of bimekizumab in axial spondyloarthritis: results of two parallel phase 3 randomised controlled trials

Ann Rheum DisPublished Randomised controlled trial

An erratum to this article was published (Ann Rheum Dis, Sep 2023 ↗)

Authors' conclusion

Dual inhibition of IL-17A and IL-17F with bimekizumab resulted in significant and rapid improvements in efficacy outcomes vs placebo and was well tolerated in patients with nr-axSpA and r-axSpA.

Study context

Population
Patients with active nr-axSpA (BE MOBILE 1; randomised 1:1) or r-axSpA (BE MOBILE 2; randomised 2:1)254 nr-axSpA, 332 r-axSpA
Comparison
Bimekizumab 160 mg every 4 weeks vs placebo
Primary endpoint
ASAS40
Follow-up
Week 16
Methodological detailstwo parallel phase 3 trials, double-blind, placebo-controlled to week 16, 52-week trials
  • Two parallel phase 3 trials
  • Double-blind
  • Placebo-controlled to week 16
  • 52-week trials

Primary result

As reported in the abstract

P < 0.001

Secondary outcomes

All ranked secondary endpoints · week 16

Met in both trials

ASAS40 by TNFi status (subgroup)

Similar across TNFi-naïve and TNFi-inadequate responder patients

Ankylosing Spondylitis Disease Activity Score (ASDAS) states and objective inflammation (high-sensitivity C-reactive protein (hs-CRP), MRI of sacroiliac joints and spine)

Improvements observed

Safety

Most frequent treatment-emergent adverse events (TEAEs) with bimekizumab (>3%) · up to week 24

Nasopharyngitis, upper respiratory tract infection, pharyngitis, diarrhoea, headache and oral candidiasis

Fungal infections

More with bimekizumab vs placebo (all localised)

Major adverse cardiovascular events (MACE) and active tuberculosis

None reported

Uveitis and adjudicated inflammatory bowel disease

Low incidence

Original publication

Efficacy and safety of bimekizumab in axial spondyloarthritis: results of two parallel phase 3 randomised controlled trials. Ann Rheum Dis. Published 17 January 2023. doi:10.1136/ard-2022-223595

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