Search

Objectives: Bimekizumab (BKZ) is a monoclonal IgG1 antibody that selectively inhibits interleukin (IL)-17F in addition to IL-17A. BKZ treatment has demonstrated superior efficacy versus placebo (PBO) at Week 16 in biologic disease-modifying antirheumatic drug (DMARD)-naïve patients with active psoriatic arthritis (PsA). Here, we report long-term efficacy and safety to Week 52., Methods: BE OPTIMAL comprised a 16-week, double-blind, PBO-controlled period, then 36 weeks treatment-blind. Patients were randomised 3:2:1 to subcutaneous BKZ 160 mg every 4 weeks, PBO with switch to BKZ at Week 16, or reference arm (adalimumab (ADA) 40 mg every 2 weeks). Efficacy outcomes included the American College of Rheumatology (ACR) response criteria 20/50/70, Psoriasis Area and Severity Index (PASI) 75/90/100 in patients with baseline psoriasis affecting ≥3% body surface area and minimal disease activity (MDA); non-responder imputation., Results: ACR20/50/70, PASI75/90/100 and MDA responses were sustained with BKZ to Week 52, consistent with results observed at Week 16. Patients who switched to BKZ at Week 16 demonstrated improvements in efficacy with similar results to BKZ-randomised patients by Week 52.To Week 52, 555/702 (79.1%) patients had ≥1 treatment-emergent adverse event (TEAE) during BKZ treatment; 113/140 (80.7%) on ADA. On BKZ, 46 (6.6%) patients had serious TEAEs. 54 (7.7%) Candida infections occurred during BKZ treatment and 1 (0.7%) during ADA; all cases were localised and non-serious. One death occurred in a BKZ-treated patient, unrelated to treatment., Conclusions: The efficacy of BKZ in bDMARD-naïve patients with PsA was sustained from Week 16 to Week 52. BKZ was well tolerated with no new safety signals observed., Trial Registration Number: NCT03895203., Competing Interests: Competing interests: CTR: research for AbbVie; consultant for Amgen, AbbVie, Eli Lilly, Gilead, Janssen, Novartis, Pfizer and UCB Pharma. LCC: has received grants/research support from AbbVie, Amgen, Celgene, Eli Lilly, Gilead, Janssen, Novartis, Pfizer and UCB Pharma; worked as a paid consultant for AbbVie, Amgen, BMS, Boehringer Ingelheim, Celgene, Domain, Eli Lilly, Galapagos, Gilead, Janssen, Moonlake, Novartis, Pfizer and UCB Pharma; and has been paid as a speaker for AbbVie, Amgen, Biogen, Celgene, Eli Lilly, Galapagos, Gilead, GSK, Janssen, Medac, Novartis, Pfizer and UCB Pharma. IBM: consulting fees and honoraria from AbbVie, AstraZeneca, BMS, Boehringer Ingelheim, Cabaletta, Causeway Therapeutics, Celgene, Eli Lilly, Evelo, Janssen, Moonlake, Novartis and UCB Pharma; research support from BMS, Boehringer Ingelheim, Celgene, Janssen, Novartis and UCB Pharma; Associate Editor at Annals of the Rheumatic Diseases. PJM: research grants from AbbVie, Amgen, BMS, Eli Lilly, Gilead, Janssen, Novartis, Pfizer, Sun Pharma and UCB Pharma; consultancy fees from AbbVie, Acelyrin, Aclaris, Amgen, BMS, Boehringer Ingelheim, Eli Lilly, Galapagos, Gilead, GSK, Janssen, Moonlake Pharma, Novartis, Pfizer, Sun Pharma and UCB Pharma; speakers’ bureau from AbbVie, Amgen, Eli Lilly, Janssen, Novartis, Pfizer and UCB Pharma. JFM: consultant and/or investigator for AbbVie, Amgen, Biogen, BMS, Dermavant, Eli Lilly, Janssen, LEO Pharma, Novartis, Pfizer, Regeneron, Sanofi, Sun Pharma and UCB Pharma. YT: speaking fees and/or honoraria from AbbVie, AstraZeneca, BMS, Boehringer Ingelheim, Chugai, Eisai, Eli Lilly, Gilead, GSK, Pfizer, Taiho and Taisho; received grants from Chugai, Eisai, Mitsubishi-Tanabe and Taisho; Editorial Board Member at Annals of the Rheumatic Diseases. AA: honoraria and/or research grants from AbbVie, Amgen, BMS, Boehringer Ingelheim, Eisai, Eli Lilly, Janssen, Kyowa Kirin, LEO Pharma, Maruho, Mitsubishi Tanabe Pharma, Novartis, Pfizer, Sun Pharma, Taiho Pharma, Torii Pharmaceutical and UCB Pharma. LG: research grants from Sandoz and UCB Pharma; consulting fees from AbbVie, Amgen, BMS, Celltrion, Eli Lilly, Galapagos, Janssen, MSD, Novartis, Pfizer, Sandoz and UCB Pharma; Editorial Board Member at Annals of the Rheumatic Diseases. ABG: received honoraria as an advisory board member and consultant for Amgen, AnaptypsBio, Avotres Therapeutics, BMS, Boehringer Ingelheim, Dice Therapeutics, Eli Lilly, Janssen, Novartis, Sanofi, UCB Pharma and Xbiotech; has received research/educational grants from AnaptypsBio, BMS, Moonlake Immunotherapeutics, Novartis and UCB Pharma (all paid to Mount Sinai School of Medicine). RBW: consulting fees from AbbVie, Almirall, Amgen, Arena, Astellas, Avillion, Biogen, BMS, Boehringer Ingelheim, Celgene, Eli Lilly, GSK, Janssen, LEO Pharma, Novartis, Pfizer, Sanofi and UCB Pharma; research grants to his institution from AbbVie, Almirall, Janssen, LEO Pharma, Novartis and UCB Pharma; honoraria from Astellas, DiCE, GSK and Union. BI: employee of UCB Pharma and shareholder of AbbVie, GSK and UCB Pharma. RB, VS, JC are all employees and shareholders of UCB Pharma. RL: consultancy fees from AbbVie, AstraZeneca, BMS, Eli Lilly, Novartis, Pfizer and UCB Pharma. Research grants from AbbVie, Novartis, Pfizer and UCB Pharma. Owner of Rheumatology Consultancy BV, an AMS company under Dutch law; Editorial Board Member at Annals of the Rheumatic Diseases., (© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)

Objectives: Bimekizumab selectively neutralises both interleukin (IL)-17A and IL-17F. We report efficacy and safety in a phase IIb dose-ranging study in patients with active ankylosing spondylitis (AS)., Methods: Adults with AS (fulfilling modified New York criteria) were randomised 1:1:1:1:1 to bimekizumab 16 mg, 64 mg, 160 mg, 320 mg or placebo every 4 weeks for 12 weeks (double-blind period). At week 12, patients receiving bimekizumab 16 mg, 64 mg or placebo were re-randomised 1:1 to bimekizumab 160 mg or 320 mg every 4 weeks to week 48; other patients continued on their initial dose (dose-blind period). The primary end point was Assessment of SpondyloArthritis international Society (ASAS) 40 response at week 12 (non-responder imputation (NRI) for missing data)., Results: 303 patients were randomised: bimekizumab 16 mg (n=61), 64 mg (n=61), 160 mg (n=60), 320 mg (n=61) or placebo (n=60). At week 12, significantly more bimekizumab-treated patients achieved ASAS40 vs placebo (NRI: 29.5%-46.7% vs 13.3%; p<0.05 all comparisons; OR vs placebo 2.6-5.5 (95% CI 1.0 to 12.9)). A significant dose-response was observed (p<0.001). The primary end point was supported by all secondary efficacy outcomes. At week 48, 58.6% and 62.3% of patients receiving bimekizumab 160 and 320 mg throughout the study achieved ASAS40, respectively (NRI); similar ASAS40 response rates were observed in re-randomised patients. During the double-blind period, treatment-emergent adverse events occurred in 26/60 (43.3%) patients receiving placebo and 92/243 (37.9%) receiving bimekizumab., Conclusions: Bimekizumab provided rapid and sustained improvements in key outcome measures in patients with active AS, with no unexpected safety findings versus previous studies., Trial Registration Number: NCT02963506., Competing Interests: Competing interests: DvdH reports personal fees from AbbVie, Amgen, Astellas, AstraZeneca, BMS, Boehringer Ingelheim, Celgene, Cyxone, Daiichi, Eisai, Eli Lilly, Galapagos, Gilead, GlaxoSmithKline, Janssen, Merck, Novartis, Pfizer, Regeneron, Roche, Sanofi, Takeda and UCB Pharma, and is Director of Imaging Rheumatology BV. LSG reports grants and personal fees from AbbVie, Amgen, Novartis, Pfizer and UCB Pharma, and personal fees from Galapagos, Janssen and Eli Lilly. AD reports personal fees from Amgen, Boehringer Ingelheim, Bristol-Myers Squibb, Galapagos and Janssen, and grants and personal fees from AbbVie, Eli Lilly, GlaxoSmithKline, Novartis, Pfizer and UCB. DP reports personal fees from UCB Pharma, BMS, Roche and Celgene, and grants and personal fees from AbbVie, Eli Lilly, MSD, Novartis and Pfizer. XB reports personal fees from AbbVie, Bristol-Myers Squibb, Celgene, Chugai, Janssen, MSD, Novartis, Pfizer and UCB Pharma, and grant/research support from Abbvie, MSD and Novartis. AK reports research support from Altoona Centernical Research, PC, during the conduct of the study; Advisory Committee or Review Panel for AbbVie, Janssen, UCB Pharma and Boehringer Ingelheim; speaking and teaching for Celgene, Horizon, Merck and Novartis; Advisory Committee or Review Panel, speaking and training for Genzyme; Advisory Committee or Review Panel, speaking/training; consultant, and stocks for Pfizer and Sanofi; Advisory Committee or Review Panel, speaking/training and consultant for Regeneron; consultant for SUN Pharma Advanced Research; Speaker and Steering Committee for Flexion; Stocks from Amgen, Gilead and GSK and Speaker for AbbVie. MO, DB and NG are employees of UCB Pharma and own stocks and stock options. JC is an employee of UCB Pharma. MKF was an employee of UCB Pharma at the time the study was conducted (current employee of Kezar Life Sciences). MD reports grants and personal fees from UCB, Eli Lilly, Novartis, Pfizer, AbbVie and Merck., (© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)