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Bimekizumab versus Secukinumab in Plaque Psoriasis

List of authors.
  • Kristian Reich, M.D., Ph.D.,
  • Richard B. Warren, M.D., Ph.D.,
  • Mark Lebwohl, M.D.,
  • Melinda Gooderham, M.D.,
  • Bruce Strober, M.D., Ph.D.,
  • Richard G. Langley, M.D.,
  • Carle Paul, M.D., Ph.D.,
  • Dirk De Cuyper, M.D.,
  • Veerle Vanvoorden, M.Sc.,
  • Cynthia Madden, M.D.,
  • Christopher Cioffi, Ph.D.,
  • Luke Peterson, M.S.,
  • and Andrew Blauvelt, M.D.



Bimekizumab is a monoclonal IgG1 antibody that selectively inhibits both interleukin-17A and interleukin-17F. The efficacy and safety of bimekizumab as compared with secukinumab, which selectively inhibits interleukin-17A alone, in patients with moderate-to-severe plaque psoriasis have not been extensively examined.


In this phase 3b trial, we randomly assigned patients with moderate-to-severe plaque psoriasis, in a 1:1 ratio, to receive bimekizumab subcutaneously at a dose of 320 mg every 4 weeks or secukinumab subcutaneously at a dose of 300 mg weekly to week 4, followed by every 4 weeks to week 48. At week 16, patients receiving bimekizumab underwent rerandomization, in a 1:2 ratio, to receive maintenance dosing every 4 weeks or every 8 weeks to week 48. The primary end point was 100% reduction from baseline in the Psoriasis Area and Severity Index (PASI) score at week 16. The primary analysis was first tested for the noninferiority of bimekizumab to secukinumab at a margin of ?10 percentage points and then tested for superiority.


A total of 1005 patients were screened and 743 were enrolled; 373 patients were assigned to receive bimekizumab and 370 to receive secukinumab. At week 16, a total of 230 patients (61.7%) in the bimekizumab group and 181 (48.9%) in the secukinumab group had a 100% reduction from baseline in the PASI score (PASI 100) (adjusted risk difference, 12.7 percentage points; 95% confidence interval [CI], 5.8 to 19.6); bimekizumab was shown to be noninferior and superior to secukinumab (P<0.001 for noninferiority and superiority). At week 48, a total of 250 patients (67.0%) treated with bimekizumab had a PASI 100 response, as compared with 171 patients (46.2%) treated with secukinumab (adjusted risk difference, 20.9 percentage points; 95% CI, 14.1 to 27.7; P<0.001). At the week 4 time point, 265 patients (71.0%) in the bimekizumab group had 75% or greater reduction from baseline in the PASI score, as compared with 175 patients (47.3%) in the secukinumab group (adjusted risk difference, 23.7; 95% CI, 17.0 to 30.4; P<0.001). Oral candidiasis occurred more often with bimekizumab (72 patients, 19.3%) than with secukinumab (11 patients, 3.0%).


In patients with moderate-to-severe psoriasis, treatment with bimekizumab resulted in greater skin clearance than treatment with secukinumab over 16 and 48 weeks but was associated with oral candidiasis (predominantly mild or moderate as recorded by the investigator). Longer and larger trials are required to determine the comparative effect and risks of interleukin-17 inhibitors in psoriasis. (Funded by UCB Pharma; BE RADIANT number, NCT03536884.)

Visual Abstract for 'Bimekizumab versus Secukinumab in Plaque Psoriasis,' K. Reich and Others (10.1056/NEJMoa2102383)VISUAL ABSTRACT
Bimekizumab versus Secukinumab in Plaque Psoriasis

Funding and Disclosures

Supported by UCB Pharma. Dr. Warren receives support from the Manchester National Institute for Health Research Biomedical Research Centre.

Disclosure forms provided by the authors are available with the full text of this article at

Drs. Reich and Warren contributed equally to this article.

This article was published on April 23, 2021, at

A data sharing statement provided by the authors is available with the full text of this article at

We thank the patients and the investigators and their teams who took part in this trial; Susanne Wiegratz, M.Sc. (UCB Pharma, Monheim, Germany), for publication coordination; Natalie Nunez Gomez, M.D. (UCB Pharma, Brussels), for critical review; and Joe Dixon, Ph.D., and Claire Hews, B.Sc. (Costello Medical), for medical writing and editorial assistance with preparing the manuscript for submission, based on the authors input and direction (funded by UCB in accordance with Good Publication Practice guidelines []).

Author Affiliations

From the Center for Translational Research in Inflammatory Skin Diseases, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (K.R.); the Dermatology Centre, Salford Royal NHS Foundation Trust, Manchester NIHR Biomedical Research Centre, University of Manchester, Manchester, United Kingdom (R.B.W.); the Icahn School of Medicine at Mount Sinai, New York (M.L.); the SKiN Centre for Dermatology, Probity Medical Research, Peterborough, and Queens University, Kingston, ON (M.G.), and Dalhousie University, Halifax, NS (R.G.L.) all in Canada; Yale University, New Haven, and Central Connecticut Dermatology Research, Cromwell both in Connecticut (B.S.); Paul Sabatier University, Toulouse, France (C.P.); UCB Pharma, Brussels (D.D.C., V.V.); UCB Pharma, Raleigh, NC (C.M., C.C., L.P.); and the Oregon Medical Research Center, Portland (A.B.).

Address reprint requests to Dr. Reich at the Institute for Health Services Research in Dermatology and Nursing, University Medical Center Hamburg-Eppendorf, Martinistra?e 52, 20246 Hamburg, Germany, or at .

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