Spondyloarthritis & psoriatic arthritis

Brodalumab, an anti–interleukin-17 receptor A monoclonal antibody, in axial spondyloarthritis: 68-week results from a phase 3 study

Rheumatology (Oxford)Published Open-label extension of a randomised controlled trial

Authors' conclusion

Brodalumab demonstrated sustained efficacy and a consistent safety profile in patients with axSpA over 68 weeks.

Study context

Population
Patients with axial spondyloarthritis (axSpA), Japan, Korea and Taiwanreceived brodalumab in open-label extension
Participants
145 patients
Comparison
Continued brodalumab 210 mg vs placebo switched to brodalumab 210 mg at week 16
  • Brodalumabn = 77
  • Placebon = 68reference
Methodological detailsmulticentre, phase 3, 16-week double-blind period, 52-week open-label extension
  • Multicentre
  • Phase 3
  • 16-week double-blind period
  • 52-week open-label extension

Primary result

As reported in the abstract

ASAS 40 response rate · week 68

Further findings

OutcomeBrodalumabPlacebo
ASAS 20 response rate · week 6871.3% (95% CI 60.0%–80.8%)78.7% (95% CI 66.3%–88.1%)
Change from baseline in ASDAS-CRP (least squares mean) · week 68Least squares mean change−1.528 (95% CI −1.737–-1.319)−1.586 (95% CI −1.815–-1.357)

ASAS 20 response rate · week 68

Similar in both treatment groups

Change from baseline in ASDAS-CRP (least squares mean) · week 68

Clinically important improvement (change, ≥1.1) in both treatment groups

Safety

Exposure-adjusted event rates (per 100 patient-years), overall

Treatment-emergent adverse events (TEAEs)
255.9
Drug-related TEAEs
147.9
Nasopharyngitis (most common TEAE)
35.6
Upper respiratory tract infection
14.7

Original publication

Brodalumab, an anti–interleukin-17 receptor A monoclonal antibody, in axial spondyloarthritis: 68-week results from a phase 3 study. Rheumatology (Oxford). Published 21 September 2022. doi:10.1093/rheumatology/keac522

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