UCB Announces First Detailed Data from Two Phase 3 Bimekizumab Studies in Psoriatic Arthritis to be Presented at EULAR 2022

• First presentations from the BE OPTIMAL and BE COMPLETE studies evaluating bimekizumab in the treatment of adults with active psoriatic arthritis who were biologic-naïve and TNF-inadequate responders, respectively
• A higher proportion of patients treated with bimekizumab vs. placebo achieved improvements in joint symptoms at week 16 as measured by ACR50, with a consistent clinical response across biologic-naïve (43.9 percent vs. 10.0 percent; p<0.001) and TNF-inadequate responder populations (43.4 percent vs. 6.8 percent; p<0.001)
• At week 16, a greater proportion of bimekizumab-treated patients achieved high levels of skin clearance, PASI90, vs. placebo, with a consistent clinical response across populations (61.3 percent vs. 2.9 percent for biologic naïve and 68.8 percent vs. 6.8 percent for TNF-inadequate responders; p<0.001 for each)
• At week 16, over 40 percent of bimekizumab-treated patients vs. placebo achieved minimal disease activity in both studies (p<0.001)

BRUSSELS and ATLANTA, May 23, 2022 /PRNewswire/ -- UCB, a global pharmaceutical company, today announced detailed results from two Phase 3 studies which evaluated the efficacy and safety of bimekizumab versus placebo in the treatment of adults with active psoriatic arthritis who were biologic disease-modifying anti-rheumatic drug naïve (BE OPTIMAL) and in adults who had an inadequate response or intolerance to tumor necrosis factor (TNF) inhibitors (BE COMPLETE).^1,2 The safety and efficacy of bimekizumab in psoriatic arthritis have not been established, and it is not approved for use in psoriatic arthritis by any regulatory authority worldwide.

Both studies met their primary endpoint of ACR50 at week 16 and all ranked secondary endpoints compared with placebo with statistical significance.^1,2 At week 16, patients treated with bimekizumab achieved clinically relevant improvements over placebo in both joint and skin symptoms with efficacy outcomes consistent across both biologic-naïve and TNF-inadequate responder populations.^1,2 In addition, at week 16, over 40 percent of patients in both studies achieved a minimal disease activity response compared with placebo.^1,2 The adverse event profile of bimekizumab was consistent with those seen in previous studies.^1,2 The results will be presented at the European Congress of Rheumatology, EULAR 2022, in Copenhagen, Denmark, June 1-4.^1,2

"Our Phase 3 clinical studies with bimekizumab used ACR50 at week 16 as the primary endpoint reflecting our goal to raise the treatment bar for people with psoriatic arthritis. Results show that bimekizumab addressed the debilitating joint symptoms of active psoriatic arthritis, while also providing high levels of skin clearance compared to placebo," said Emmanuel Caeymaex, Executive Vice President, Immunology Solutions and Head of U.S., UCB. "Importantly, the consistent findings seen across  populations suggest that bimekizumab can provide a similar clinical response in patients that have an inadequate response or intolerance to TNF inhibitors, and in patients that are new to biologics."

"Today's findings from the BE OPTIMAL and BE COMPLETE studies provide clear evidence supporting the potential of bimekizumab, a dual IL-17A and IL-17F inhibitor, in the treatment of active psoriatic arthritis. This painful, chronic condition can greatly impact patients' lives. Achieving minimal disease activity is an important goal of treatment, that can ultimately lead to improved quality of life for people with psoriatic arthritis," said  Joseph F. Merola, MD, MMSc, Associate Professor, Harvard Medical School and Brigham and Women's Hospital.

Data from BE COMPLETE (16-week analysis) and BE OPTIMAL (24-week interim analysis)

Joint Symptoms: In both studies, patients treated with bimekizumab (160 mg every four weeks [Q4W]) achieved statistically significant improvements in the primary endpoint of at least 50 percent or greater improvement from baseline in the American College of Rheumatology response criteria (ACR50) at week 16, compared with placebo.^1,2 

• In BE OPTIMAL, at week 16, 43.9 percent (n=189/431) of biologic naïve patients treated with bimekizumab achieved ACR50 versus 10.0 percent (n=28/281) of patients on placebo; p<0.001.¹
• In BE COMPLETE, at week 16, 43.4 percent (n=116/267) of TNF-inadequate responder patients treated with bimekizumab achieved ACR50 versus 6.8 percent (n=9/133) of patients on placebo; p<0.001.²

Skin Symptoms: In both studies, patients treated with bimekizumab achieved statistically significant improvements in levels of skin clearance, as measured by the ranked secondary endpoint of at least a 90 percent improvement in the Psoriasis Area and Severity Index (PASI90) at week 16, compared with placebo.^1.2

• In BE OPTIMAL, at week 16, 61.3 percent (n=133/217) of biologic naïve patients treated with bimekizumab achieved PASI90 versus 2.9 percent (n=4/140) on placebo; p<0.001.¹
• In BE COMPLETE, at week 16, 68.8 percent (n=121/176) of TNF-inadequate responder patients treated with bimekizumab achieved PASI90 versus 6.8 percent (n=6/88) on placebo; p<0.001.²

Minimal Disease Activity: In both studies, a significantly higher proportion of patients treated with bimekizumab achieved the ranked secondary endpoint of Minimal Disease Activity (MDA) response, compared with placebo at week 16.^1,2

• In BE OPTIMAL, at week 16, 45.0 percent (n=194/431) of biologic-naïve patients treated with bimekizumab achieved MDA versus 13.2 (n=37/281) percent on placebo; p<0.001.¹
• In BE COMPLETE, at week 16, 44.2 percent (n=118/267) of TNF-inadequate responder patients treated with bimekizumab achieved MDA versus 6.0 percent (n=8/133) on placebo; p<0.001.²

"In the BE OPTIMAL and BE COMPLETE studies, bimekizumab demonstrated clinically relevant improvements in musculoskeletal and skin outcomes for people with psoriatic arthritis compared with placebo. In addition, results from the BE OPTIMAL study show that treatment with bimekizumab was associated with inhibition of structural joint damage progression by week 16," said Iain McInnes, Professor, Vice Principal and Head of College, University of Glasgow, Scotland.

Additional Outcomes 

• In BE OPTIMAL, treatment with bimekizumab compared with placebo was associated with a statistically significant inhibition of progression of structural joint damage at week 16, as measured by mean change from baseline in the van der Heijde modified Total Sharp Score (vdHmTSS), a ranked secondary endpoint.¹
• The clinical response in both studies was rapid, with separation from placebo observed from week two in BE OPTIMAL (ACR20; p<0.001, nominal, not controlled for multiplicity) and week four in BE COMPLETE (ACR50; p<0.001, nominal, not controlled for multiplicity).^1,2
• In BE OPTIMAL, response rates continued to improve to week 24: 45.5 percent (n=196/431) of patients treated with bimekizumab achieved ACR50 and 35.9 percent (n=101/281) of patients switching from placebo to bimekizumab at week 16 achieved ACR50, following an eight week treatment duration; 72.8 percent (n=158/217) of bimekizumab-treated patients achieved PASI90 and 61.4 percent (n=86/140) of patients switching from placebo to bimekizumab at week 16 achieved PASI90; 48.5 percent (n=209/431) of patients treated with bimekizumab achieved MDA and 37.7 percent (n=106/281) switching from placebo to bimekizumab at week 16 achieved MDA.¹
• An active reference arm of adalimumab was included in the BE OPTIMAL study. The study was not powered for statistical comparisons with the bimekizumab treatment group or placebo. At week 16, 45.7 percent (n=64/140), 41.2 percent (n=28/68) and 45.0 percent (n=63/140) of patients treated with adalimumab achieved ACR50, PASI90 and MDA, respectively.¹ 

In BE OPTIMAL, over 16 weeks, 59.9 percent of patients treated with bimekizumab had ≥ one treatment emergent adverse event (TEAE) versus 49.5 percent of patients on placebo and 59.3 percent on adalimumab.¹ The three most frequent TEAEs (≥5 percent in any treatment arm) were nasopharyngitis (9.3 percent for bimekizumab; 4.6 percent for placebo and 5.0 percent for adalimumab), upper respiratory tract infection (4.9 percent for bimekizumab; 6.4 percent for placebo and 2.1 percent for adalimumab) and increased alanine aminotransferase (0.7 percent for bimekizumab; 0.7 percent for placebo and 5.0 percent for adalimumab).¹ Candida infections were reported in 2.6 percent of bimekizumab-treated patients, 0.7 percent on placebo and 0 percent on adalimumab.¹ The incidence of serious adverse events (SAEs) was low: 1.6 percent of patients treated with bimekizumab versus 1.1 percent on placebo and 1.4 percent on adalimumab.¹ No cases of systemic candidiasis, inflammatory bowel disease (IBD), major adverse cardiovascular events (MACE) or uveitis were reported.¹ 

In BE COMPLETE, over 16 weeks, 40.1 percent of patients treated with bimekizumab had ≥ one TEAE versus 33.3 percent of patients on placebo.² The three most frequent TEAEs for patients treated with bimekizumab were nasopharyngitis (3.7 percent; 0.8 percent for placebo), oral candidiasis (2.6 percent; 0.0 percent for placebo), and upper respiratory tract infection (2.2 percent; 1.5 percent for placebo).² Two patients on bimekizumab discontinued treatment due to a TEAE (0.7 percent). The incidence of SAEs was low: 1.9 percent of patients treated with bimekizumab versus 0 percent on placebo, and none led to discontinuation.² No cases of systemic candidiasis, IBD, MACE, venous thromboembolism (VTE), or uveitis were reported.² 

About BE OPTIMAL

BE OPTIMAL is a randomized, multicenter, double-blind, placebo-controlled, active reference (adalimumab), parallel-group, Phase 3 study designed to evaluate the efficacy and safety of bimekizumab in the treatment of adult patients with active psoriatic arthritis, who are biologic disease-modifying anti-rheumatic drug naïve.³ The study is ongoing with 24-week interim analysis presented above. For additional details on the study, visit BE OPTIMAL on clinicaltrials.gov.³ 

About BE COMPLETE

BE COMPLETE was a randomized, multicenter, double-blind, placebo-controlled, parallel group, Phase 3 study designed to evaluate the efficacy and safety of bimekizumab in tumor necrosis factor-alpha inhibitors (TNFαi) experienced adults with active psoriatic arthritis.⁴ All enrolled study participants had a history of inadequate response (lack of efficacy after at least three months of therapy at an approved dose) or intolerance to treatment with one or two TNFαi for either psoriatic arthritis or psoriasis.⁴ For additional details on the study, visit BE COMPLETE on clinicaltrials.gov.⁴

About Psoriatic Arthritis

Psoriatic arthritis (PsA) is a serious, highly heterogeneous, chronic, systemic inflammatory condition affecting both the joints and skin, with a prevalence of 0.06 percent to 0.25 percent of the total U.S. population, and 6 percent to 41 percent of patients with psoriasis.⁵ Symptoms include joint pain and stiffness, skin plaques, swollen toes and fingers (dactylitis), and inflammation of the sites where tendons or ligaments insert into the bone (enthesitis).⁶

About bimekizumab

Bimekizumab is a humanized monoclonal IgG1 antibody that is designed to selectively inhibit both interleukin 17A (IL-17A) and interleukin 17F (IL-17F), two key cytokines driving inflammatory processes.⁷ Bimekizumab is in Phase 3 clinical development for the treatment of active psoriatic arthritis with 24-week interim analysis from the BE OPTIMAL study and 16-week analysis from the BE COMPLETE study to be presented at EULAR 2022.^1,2 In addition, bimekizumab is in development for the treatment of active axial spondyloarthritis with 24-week interim analysis results from BE MOBILE 1 (non-radiographic axial spondyloarthritis) and BE MOBILE 2 (ankylosing spondylitis) studies to be presented at EULAR 2022.^8,9

Bimekizumab is currently under review by the U.S. Food and Drug Administration (FDA) for the treatment of moderate to severe plaque psoriasis in adults, and its efficacy and safety have not been established for any indication in the U.S.

For further information, contact UCB:

Investor Relations
Antje Witte
T +32.2.559.94.14
email antje.witte@ucb.com 

Corporate Communications
Ally Funk
T +1.678.365.6321
email ally.funk@ucb.com

Brand Communications
Eimear O'Brien
T +32.2.559.92.71
email eimear.obrien@ucb.com 

About UCB
UCB, Brussels, Belgium (www.ucb.com) is a global biopharmaceutical company focused on the discovery and development of innovative medicines and solutions to transform the lives of people living with severe diseases of the immune system or of the central nervous system. With approximately 8,600 people in approximately 40 countries, the company generated revenue of €5.8 billion in 2021. UCB is listed on Euronext Brussels (symbol: UCB). Follow us on Twitter: @UCB_news.

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References

¹ McInnes I, Coates L, Landewé R.B.M. et al. Bimekizumab in bDMARD-Naïve Patients with Psoriatic Arthritis: 24-Week Efficacy & Safety from BE OPTIMAL, a Phase 3, Multicentre, Randomised, Placebo-Controlled, Active Reference Study. Abstract presented at EULAR 2022
² Merola JF, Mcinnes I, Ritchlin CT et al. Bimekizumab in Patients with Active Psoriatic Arthritis and an Inadequate Response to Tumour Necrosis Factor Inhibitors: 16-Week Efficacy & Safety from BE COMPLETE, a Phase 3, Multicentre, Randomised Placebo-Controlled Study. Abstract presented at EULAR 2022.
³ ClinicalTrials.gov. A Study to Test the Efficacy and Safety of Bimekizumab in the Treatment of Subjects with Active Psoriatic Arthritis (BE OPTIMAL). Available at: https://www.clinicaltrials.gov/ct2/show/NCT03895203?term=BE+OPTIMAL&draw=2&rank=1 Last accessed: May 2022.
⁴ ClinicalTrials.gov. A Study to Evaluate the Efficacy and Safety of Bimekizumab in the Treatment of Subjects with Active Psoriatic Arthritis (BE COMPLETE). Available at: https://www.clinicaltrials.gov/ct2/show/NCT03896581 Last accessed: May 2022.
⁵ Ogdie A, Weiss P. The Epidemiology of Psoriatic Arthritis. Rheum Dis Clin North Am. 2015; 41(4): 545–568.
⁶ Mease PJ, Armstrong AW. Managing patients with psoriatic disease: the diagnosis and pharmacologic treatment of psoriatic arthritis in patients with psoriasis. Drugs. 2014; 74:423-441.
⁷ Glatt S, Helmer E, Haier B, et al. First-in-human randomized study of bimekizumab, a humanized monoclonal antibody and selective dual inhibitor of IL-17A and IL-17F, in mild psoriasis. Br J Clin Pharmacol. 2017;83(5):991-1001.
⁸ ClinicalTrials.gov. A Study to Evaluate the Efficacy and Safety of Bimekizumab in Subjects With Active Nonradiographic Axial Spondyloarthritis (BE MOBILE 1). Available at: https://clinicaltrials.gov/ct2/show/NCT03928704.  Last accessed: May 2022.
⁹ ClinicalTrials.gov. A Study to Evaluate the Efficacy and Safety of Bimekizumab in Subjects With Active Ankylosing Spondylitis (BE MOBILE 2). Available at: https://www.clinicaltrials.gov/ct2/show/NCT03928743. Last accessed: May 2022

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