A Study of Ixekizumab in Participants With Active Psoriatic Arthritis

Summary

This study will assess the safety and efficacy of ixekizumab (LY2439821) compared to placebo in participants with active psoriatic arthritis.

Timeline

Start

2012-12

Primary completion

2014-12

Completion

2017-09

Outcome

Met primary endpoint

paper Significantly more patients treated with ixekizumab achieved an ACR20 response with IXEQ2W (62.1%) or IXEQ4W (57.9%) than placebo (30.2%) (p≤0.001; non-responder imputation method). PMID 27553214 ↗

registry analysis (superiority or other test); Placebo vs Ixekizumab Q4W; p <0.001; Regression, Logistic NCT01695239 ↗

Publications

• Kristensen LE, McGonagle D, Rudwaleit M, Kameda H, Wurtzen PA, Ngantcha M, Holzkamper T, Smolen J. Synergistic Improvements in Synovitis, Enthesitis, and Patient-Reported Outcomes for Patients with Psoriatic Arthritis Treated with Ixekizumab in SPIRIT Trials. Rheumatol Ther. 2025 Apr;12(2):381-395. doi: 10.1007/s40744-025-00748-8. Epub 2025 Feb 27.
• Tillett W, Birt J, Vadhariya A, Ross S, Ngantcha M, Ng KJ. Filling the "GAP" in Real-World Assessment of Psoriatic Arthritis Disease Activity: Performance Characteristics of a Global/Pain Composite Endpoint. Rheumatol Ther. 2024 Oct;11(5):1101-1114. doi: 10.1007/s40744-024-00690-1. Epub 2024 Jul 2.
• Armstrong AW, Jaleel T, Merola JF, Gottlieb AB, Khattri S, Helt CC, Malatestinic WN, Ross SE, Ngantcha ME, de Vlam K. Ixekizumab Demonstrates Rapid and Consistent Efficacy for Patients with Psoriatic Arthritis, Regardless of Psoriasis Severity. Dermatol Ther (Heidelb). 2024 Jun;14(6):1615-1631. doi: 10.1007/s13555-024-01188-y. Epub 2024 May 30.
• Kameda H, Hagimori K, Morisaki Y, Holzkamper T, Konomi A, Dobashi H. Ixekizumab Efficacy in Patients with Severe Peripheral Psoriatic Arthritis: A Post Hoc Analysis of a Phase 3, Randomized, Double-Blind, Placebo-Controlled Study (SPIRIT-P1). Rheumatol Ther. 2023 Dec;10(6):1683-1703. doi: 10.1007/s40744-023-00605-6. Epub 2023 Oct 19.
• Coates LC, Smolen JS, Mease PJ, Husni ME, Merola JF, Lespessailles E, Kishimoto M, Macpherson L, Bradley AJ, Bolce R, Helliwell PS. Comparative performance of composite measures from two phase III clinical trials of ixekizumab in psoriatic arthritis. RMD Open. 2022 Sep;8(2):e002457. doi: 10.1136/rmdopen-2022-002457.
• Eder L, Tony HP, Odhav S, Agirregoikoa EG, Korkosz M, Schwartzman S, Sprabery AT, Gellett AM, Park SY, Bertram CC, Ogdie A. Responses to Ixekizumab in Male and Female Patients with Psoriatic Arthritis: Results from Two Randomized, Phase 3 Clinical Trials. Rheumatol Ther. 2022 Jun;9(3):919-933. doi: 10.1007/s40744-022-00445-w. Epub 2022 Apr 9.
• Deodhar AA, Combe B, Accioly AP, Bolce R, Zhu D, Gellett AM, Sprabery AT, Burmester GR. Safety of ixekizumab in patients with psoriatic arthritis: data from four clinical trials with over 2000 patient-years of exposure. Ann Rheum Dis. 2022 Jul;81(7):944-950. doi: 10.1136/annrheumdis-2021-222027. Epub 2022 Apr 7.
• Combe B, Tsai TF, Huffstutter JE, Sprabery AT, Lin CY, Park SY, Kronbergs A, Hufford MM, Nash P. Ixekizumab, with or without concomitant methotrexate, improves signs and symptoms of PsA: week 52 results from Spirit-P1 and Spirit-P2 studies. Arthritis Res Ther. 2021 Jan 27;23(1):41. doi: 10.1186/s13075-020-02388-5.
• Schweikert B, Malmberg C, Nunez M, Dilla T, Sapin C, Hartz S. Cost-effectiveness analysis of ixekizumab versus secukinumab in patients with psoriatic arthritis and concomitant moderate-to-severe psoriasis in Spain. BMJ Open. 2020 Aug 13;10(8):e032552. doi: 10.1136/bmjopen-2019-032552.
• Chandran V, van der Heijde D, Fleischmann RM, Lespessailles E, Helliwell PS, Kameda H, Burgos-Vargas R, Erickson JS, Rathmann SS, Sprabery AT, Birt JA, Shuler CL, Gallo G. Ixekizumab treatment of biologic-naive patients with active psoriatic arthritis: 3-year results from a phase III clinical trial (SPIRIT-P1). Rheumatology (Oxford). 2020 Oct 1;59(10):2774-2784. doi: 10.1093/rheumatology/kez684.
• Combe B, Rahman P, Kameda H, Canete JD, Gallo G, Agada N, Xu W, Genovese MC. Safety results of ixekizumab with 1822.2 patient-years of exposure: an integrated analysis of 3 clinical trials in adult patients with psoriatic arthritis. Arthritis Res Ther. 2020 Jan 21;22(1):14. doi: 10.1186/s13075-020-2099-0.
• Tillett W, Lin CY, Zbrozek A, Sprabery AT, Birt J. A Threshold of Meaning for Work Disability Improvement in Psoriatic Arthritis Measured by the Work Productivity and Activity Impairment Questionnaire. Rheumatol Ther. 2019 Sep;6(3):379-391. doi: 10.1007/s40744-019-0155-5. Epub 2019 Jun 1.
• Coates LC, Orbai AM, Morita A, Benichou O, Kerr L, Adams DH, Shuler CL, Birt J, Helliwell PS. Achieving minimal disease activity in psoriatic arthritis predicts meaningful improvements in patients' health-related quality of life and productivity. BMC Rheumatol. 2018 Aug 13;2:24. doi: 10.1186/s41927-018-0030-y. eCollection 2018.
• Gladman DD, Orbai AM, Klitz U, Wei JC, Gallo G, Birt J, Rathmann S, Shrom D, Marzo-Ortega H. Ixekizumab and complete resolution of enthesitis and dactylitis: integrated analysis of two phase 3 randomized trials in psoriatic arthritis. Arthritis Res Ther. 2019 Jan 29;21(1):38. doi: 10.1186/s13075-019-1831-0.
• Gottlieb AB, Strand V, Kishimoto M, Mease P, Thaci D, Birt J, Lee CH, Shuler CL, Lin CY, Gladman DD. Ixekizumab improves patient-reported outcomes up to 52 weeks in bDMARD-naive patients with active psoriatic arthritis (SPIRIT-P1). Rheumatology (Oxford). 2018 Oct 1;57(10):1777-1788. doi: 10.1093/rheumatology/key161.
• Coates LC, Kishimoto M, Gottlieb A, Shuler CL, Lin CY, Lee CH, Mease PJ. Ixekizumab efficacy and safety with and without concomitant conventional disease-modifying antirheumatic drugs (cDMARDs) in biologic DMARD (bDMARD)-naive patients with active psoriatic arthritis (PsA): results from SPIRIT-P1. RMD Open. 2017 Dec 22;3(2):e000567. doi: 10.1136/rmdopen-2017-000567. eCollection 2017.
• van der Heijde D, Gladman DD, Kishimoto M, Okada M, Rathmann SS, Moriarty SR, Shuler CL, Carlier H, Benichou O, Mease PJ. Efficacy and Safety of Ixekizumab in Patients with Active Psoriatic Arthritis: 52-week Results from a Phase III Study (SPIRIT-P1). J Rheumatol. 2018 Mar;45(3):367-377. doi: 10.3899/jrheum.170429. Epub 2017 Dec 15.
• Mease PJ, van der Heijde D, Ritchlin CT, Okada M, Cuchacovich RS, Shuler CL, Lin CY, Braun DK, Lee CH, Gladman DD; SPIRIT-P1 Study Group. Ixekizumab, an interleukin-17A specific monoclonal antibody, for the treatment of biologic-naive patients with active psoriatic arthritis: results from the 24-week randomised, double-blind, placebo-controlled and active (adalimumab)-controlled period of the phase III trial SPIRIT-P1. Ann Rheum Dis. 2017 Jan;76(1):79-87. doi: 10.1136/annrheumdis-2016-209709. Epub 2016 Aug 23.

Drugs

Evaluation	Drug	Modality	Dose	Route
Comparator	Adalimumab	Monoclonal antibody	40 mg	Subcutaneous
Subject	Ixekizumab	Monoclonal antibody	80 mg	Subcutaneous

Indications