POS0928 NETAKIMAB EFFICACY IN ANTI-TNF-NAIVE AND ANTI-TNF-EXPERIENCED PATIENTS WITH ACTIVE ANKYLOSING SPONDYLITIS: RESULTS OF SUBANALYSIS OF PHASE 3 ASTERA TRIAL

Abstract

Background:According to previous studies, the effectiveness of interleukin-17 (IL-17) inhibitors was higher in anti-TNF-naïve patients with ankylosing spondylitis (AS) [1,2]. Netakimab (NTK) is a humanized anti-IL-17A antibody approved for the treatment of AS, psoriatic arthritis, moderate-to-severe plaque psoriasis in Russia and Belarus.Objectives:To compare the efficacy of NTK in anti-TNF-naïve patients with anti-TNF-experienced patients with active AS at week 16 of therapy.Methods:ASTERA (NCT03447704) is an ongoing phase 3 placebo (PBO)-controlled clinical study, aimed at evaluating NTK efficacy in AS [3]. 228 adult patients with active AS (BASDAI ≥ 4) were randomly assigned (1:1) to receive 120 mg NTK or PBO subcutaneously at week 0,1,2 and then q2w. This analysis includes 112 patients in NTK group. Efficacy endpoints included ASAS20/40, ASAS5/6 and ASAS partial remission (PR) at week 16 of therapy.Results:28 (25.0%) of 112 patients in NTK group had previous inadequate response/intolerance to anti-TNF (anti-TNF-IR): 24 (21.4%) – one anti-TNF, and 4 (3.6%) – two anti-TNF. 84 (75.0%) patients were TNF-naive. Achievement of ASAS criteria response at week 16 was similar in both groups (Table 1).Table 1.Efficacy of NTK at week 16ParameterTNF-naïve (n = 84)anti-TNF-IR (n = 28)p-value*ASAS20, n (%)52 (61.9%)17 (60.7%)0.91ASAS40, n (%)35 (41.7%)11 (39.3%)0.82ASAS5/6, n (%)39 (46.4%)11 (39.3%)0.51ASAS(PR), n (%)15 (17.9%) 4 (14.3%)0.78*- Fisher’s exact testConclusion:NTK 120 mg provided sustained improvements in signs and symptoms of AS in anti-TNF-naive and anti-TNF-IR patients at 16 weeks of therapy.References:[1]Blair HA, Dhillon S. Secukinumab: A Review in Ankylosing Spondylitis. Drugs. 2016;76(10):1023-30.[2]Dougados M, et al. Efficacy and safety of ixekizumab through 52 weeks in two phase 3, randomised, controlled clinical trials in patients with active radiographic axial spondyloarthritis (COAST-V and COAST-W). Ann Rheum Dis. 2020;79(2):176-185.[3]Mazurov VI, et al. Efficacy and safety of Netakimab, anti-IL-17A monoclonal antibody, in patients with ankylosing spondylitis. Results of phase III international, multicenter, randomized double-blind clinical trial BCD-085-5/ASTERA. Nauchno-Practicheskaya Revmatologia=Rheumatology Science and Practice. 2020;58 (4):376–386 (In Russ).Acknowledgements:This study was sponsored by JSC BIOCAD.Disclosure of Interests:Shandor Erdes: None declared, V Mazurov: None declared, Tatiana Dubinina: None declared, Inna Gaydukova Speakers bureau: Abbvie, Biocad, Eli Lilly, MSD, Novartis, Pfizer, Sandoz, Alena Kundzer: None declared, Nikolaj Soroka: None declared, Anna Eremeeva Employee of: Biocad