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Silverberg JI, Strober B, Feinstein B, Xu J, Guttman-Yassky E, Simpson EL, Li P, Longphre M, Song J, Guo J, Yun J, Williams B, Pan W, Ho S, Collazo R, Wei Z. Efficacy and safety of rademikibart (CBP-201), a next-generation mAb targeting IL-4Rα, in adults with moderate to severe atopic dermatitis: A phase 2 randomized trial (CBP-201-WW001). J Allergy Clin Immunol 2024; 153:1040-1049.e12. [PMID: 38157942 DOI: 10.1016/j.jaci.2023.11.924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 10/05/2023] [Accepted: 11/03/2023] [Indexed: 01/03/2024]
Abstract
BACKGROUND Rademikibart (CBP-201) is a next-generation IL-4 receptor alpha-targeting antibody. OBJECTIVE We sought to evaluate rademikibart in adults with moderate to severe atopic dermatitis. METHODS A total of 226 patients were randomized, double-blind, to subcutaneous rademikibart (300 mg every 2 weeks [Q2W], 150 mg Q2W, 300 mg every 4 weeks [Q4W]; plus 600-mg loading dose) or placebo. Randomization began in July 2020. The trial was completed in October 2021. RESULTS The WW001 phase 2 trial achieved its primary end point: significant percent reduction from baseline in least-squares mean Eczema Area Severity Index (EASI) to week 16 with rademikibart 300 mg Q2W (-63.0%; P = .0007), 150 mg Q2W (-57.6%; P = .0067), 300 mg Q4W (-63.5%; P = .0004) versus placebo (-39.7%). EASI scores decreased significantly with 300 mg Q2W and Q4W at the earliest assessment (week 2), with no evidence of plateauing by week 16. Significant improvements were also observed in secondary end points, including pruritus. Across the primary and secondary end points, efficacy tended to be comparable with 300 mg Q2W and Q4W dosing. Rademikibart and placebo had similar, low incidence of treatment-emergent adverse events (TEAEs) (48% vs 54%), serious TEAEs (1.8% vs 3.6%), TEAEs leading to treatment discontinuation (1.2% vs 1.8%), conjunctivitis of unspecified cause (2.9% vs 0%), herpes (0.6% vs 1.8%), and injection-site reactions (1.8% vs 1.8%). Although no discontinuations were attributed to coronavirus disease 2019, pandemic-related restrictions likely had an impact on trial conduct. CONCLUSIONS Rademikibart was efficacious and well tolerated at Q2W and Q4W intervals. Q4W dosing is a more convenient frequency than approved for current therapies.
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Affiliation(s)
- Jonathan I Silverberg
- Department of Dermatology, George Washington University School of Medicine and Health Sciences, Washington, DC.
| | - Bruce Strober
- Yale University, New Haven, Conn; Central Connecticut Dermatology, Cromwell, Conn
| | - Brian Feinstein
- Encore Medical Research LLC, Boynton Beach, Fla; Feinstein Dermatology & Cosmetic Surgery, Delray Beach, Fla
| | - Jinhua Xu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China; Shanghai Institute of Dermatology, Shanghai, China
| | - Emma Guttman-Yassky
- Department of Dermatology and Laboratory of Inflammatory Skin Diseases, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Eric L Simpson
- Department of Dermatology, Oregon Health and Science University, Portland, Ore
| | - Pauline Li
- Connect Biopharma, San Diego, Calif and Suzhou, China
| | | | - Jing Song
- Connect Biopharma, San Diego, Calif and Suzhou, China
| | - Jiawang Guo
- Connect Biopharma, San Diego, Calif and Suzhou, China
| | - Jang Yun
- Connect Biopharma, San Diego, Calif and Suzhou, China
| | | | - Wubin Pan
- Connect Biopharma, San Diego, Calif and Suzhou, China
| | - Selwyn Ho
- Connect Biopharma, San Diego, Calif and Suzhou, China
| | - Raúl Collazo
- Connect Biopharma, San Diego, Calif and Suzhou, China
| | - Zheng Wei
- Connect Biopharma, San Diego, Calif and Suzhou, China
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