AB0791 NETAKIMAB REDUCES SKIN MANIFESTATIONS OF PSORIATIC ARTHRITIS: RESULTS OF SUBANALYSIS FROM A DOUBLE-BLIND RANDOMIZED PHASE 3 STUDY (PATERA)
Authors: T. Korotaeva, I. Gaydukova, V. Mazurov, A. Samtsov, V. Khayrutdinov, A. Bakulev, M. Kokhan, A. Kundzer, N. Soroka, E. Dokukina, A. Eremeeva
Journal: Annals of the Rheumatic Diseases (2020)

Background: Patients with psoriatic arthritis (PsA) have skin manifestations that negatively affect their quality of life. Netakimab (NTK) is a humanized anti-interleukin 17A antibody approved for the treatment of moderate-to-severe plaque psoriasis. Objectives: To evaluate the efficacy of NTK on PsA skin manifestations. This abstract presents 24-week data from the ongoing phase 3 PATERA study ( NCT03598751 ). Methods: PATERA is an international, multicenter, double-blind, placebo (PBO)-controlled study. 194 eligible adult patients with psoriatic arthritis (CASPAR, 2006), with inadequate response to csDMARD or one TNFi, were randomly assigned (1:1) to receive NTK 120 mg or placebo (PBO) subcutaneously at Week (Wk) 0, 1, 2, 4, 6, 8, 10, 14, 18, 22. 84 patients from PBO arm, failed to achieve ACR20 (20% improvement in American College of Rheumatology criteria) at Wk 16, were switched to NTK. Endpoints for assessment of skin involvement included PASI the proportion of patients achieving 75%, 90%, and 100% improvement in Psoriasis Area and Severity Index score (PASI75, PASI90 and PASI100, respectively). Results: 184 patients (NTK arm, N=94; PBO arm, N=90) had PASI&gt;0 at baseline (BL). Demographics and BL characteristics were balanced between treatment arms (Table 1). Treatment response was assessed in patients with ≥3% body surface area involvement (BSA) at BL. PASI75/90/100 response rates for NTK arm were significantly greater than for PBO and increased throughout the whole analyzed period. At Wk 24 PASI75 was achieved by 82.89% vs 11.11% for NTK and PBO, respectively (p&lt;0.0001). A significantly higher percentage of patients achieved complete skin clearance (PASI100) in NTK arm compared to PBO (48.68% vs 6.94%, p&lt;0.0001). PASI90 response rate was also higher for NTK (Figure 1). Relative change (%) from baseline in PASI score correlated with PASI75/90/100 response rates throughout the entire analyzed period. PASI decreased by 87.5 % in NTK arm vs only 4.4% in PBO arm after 24 wks of treatment (Table 2). Table 1. BL characteristics (for patients with PASI&gt;0 at BL) Arm NTK (N=94) PBO (N=90) Age (years) * 44.0 (11.82) 42.9 (12.14) Male, n (%) 51 (54.26) 48 (53.33) PsA duration, mo * 63.3 (73.81) 68.1 (79.79) PASI * 12.27 (11.31) 10.35 (9.80) * mean (standard deviation); mo=months, PASI=Psoriasis Area and Severity Index Table 2. Percentage (%) change from baseline in PASI total score (mean (SD)) NTK (N=76) PBO (N=72) Week 4* -61.1 (36.04) -8.6 (31.99) Week 8* -74.2 (35.36) -8.4 (37.57) Week 16* -80.8 (49.38) -2.3 (61.06) Week 24* -87.5 (32.83) -4.4 (63.48) Data are presented for patients with BL BSA ≥ 3%; *p&lt;0.0001 vs placebo Figure 1. Percentage of patients with PASI75/90/100 at Wk 24 (in patients with BL BSA≥3) Conclusion: 24-week treatment with NTK at the dose of 120 mg resulted in significant improvement in skin manifestations in PsA patients: more than half of the patients with BSA≥3 at BL achieved complete skin clearance. Acknowledgments: This study was sponsored by JSC BIOCAD. Disclosure of Interests: Tatiana Korotaeva Consultant of: Pfizer, MSD, Novartis, AbbVie, Celgene, JSC BIOCAD, Janssen, UCB, Lilly and Novartis-Sandoz, Speakers bureau: Pfizer, MSD, Novartis, AbbVie, Celgene, JSC BIOCAD, Janssen, UCB, Lilly and Novartis-Sandoz, Inna Gaydukova Grant/research support from: JSC BIOCAD, Speakers bureau: Pfizer, Novartis, AbbVie, JSC BIOCAD, Сelgene, MSD, Sanofi, V Mazurov: None declared, Aleksey Samtsov Grant/research support from: JSC BIOCAD, Novartis, Eli Lilly, Johnson&amp;Johnson, Celgene, Glenmark, Galderma, Sanofi, Vladislav Khayrutdinov Grant/research support from: Akrikhin, Alkoy, Belupo, JSC BIOCAD, Bosnaliejk, Verteks, Glenmark, Elfa, Leo Pharma, MSD, Novartis, Pfizer, Sun Pharma, Sanofi, Celgene, Pharmtec, AbbVie, Eli Lilly, Jadran, Janssen, Andrey Bakulev Grant/research support from: AbbVie, Eli Lilly, Pfizer, UCB, MSD, Novartis, Galderma, Celgene, Leo Pharma and Johnson&amp;Johnson, JSC BIOCAD, Consultant of: Novartis, Celgene and Johnson&amp;Johnson, Speakers bureau: AbbVie, Eli Lilly, Galderma, UCB, Novartis, Celgene and Johnson&amp;Johnson, Muza Kokhan Grant/research support from: AbbVie, Eli Lilly, Pfizer, UCB, MSD, Novartis, Galderma, Celgene, Leo Pharma and Johnson&amp;Johnson, JSC BIOCAD, Consultant of: Novartis, Celgene and Johnson&amp;Johnson, Speakers bureau: AbbVie, Eli Lilly, Galderma, UCB, Novartis, Celgene and Johnson&amp;Johnson, Alena Kundzer: None declared, Nikolaj Soroka Grant/research support from: JSC BIOCAD, Ekaterina Dokukina Employee of: JSC BIOCAD, Anna Eremeeva Employee of: JSC BIOCAD