Course of Uveitis in Patients with Ankylosing Spondylitis during the Interleukin17 Inhibitors Therapy

Biological disease-modifying antirheumatic drugs (bDMARDs) can have different effects on various clinical manifestations of ankylosing spondylitis (AS). Data on the effects of interleukin 17 inhibitors (IL17-i) on uveitis in AS continue to accumulate. Objective: to evaluate the effect of IL17-i therapy on the course of uveitis in AS. The study involved 73 patients with AS (New York criteria, 1984), who received IL17-i (57-secukinumab (SEC), 22-netakimab (NTK)) for at least 1 year. The average age of patients at the time of inclusion in the study was 41.93 ± 8.95 years, the average duration of AS was 10.75 ± 6.22 years. There were 40 men (56.7%) and 33 women (43.3%) among the patients. HLA-B27 was detected in 62/73 (85%), coxitis in 58 (79%), enthesitis in 63 (86.3%), peripheral arthritis in 57 (78%), psoriasis in 7 (9.5%), and inflammatory bowel disease (IBD) in 3 (4.1%) patients; in 6 (8.2%) patients, the disease started before the age of 16; 19 (26%) patients had at least one episode of uveitis during the course of the disease. The rates of uveitis was estimated by comparing the number of incidences per 100 patient-years before the start of bDMARDs therapy and during IL17-i using. The incidence rate of uveitis before the start of bDMARDs therapy for all patients was 8.3 per 100 pt-years (95% CI 0.065-0.107), during IL17-i therapy- 9.2 per 100 pt-years (95% CI 0.06-0.15), p = 0.72. The incidence rate of uveitis among patients who used SEC was 10.1 per 100 pt-years (95% CI 0.079-0.13) before the start of bDMARDs therapy and 9.4 per 100 pt-years (95% CI 0.05-0.15), p = 0.74 during SEC therapy. The incidence rate of uveitis among patients who used NTK was 4.8 per 100 pt-years (95% CI 0.028-0.08) before the start of bDMARDs therapy and 7.1 per 100 pt-years (95% CI 0.019-022), p = 0.3 during the NTK therapy. For patients with a history of uveitis, the incidence rate of uveitis was 22.5 per 100 pt-years (95% CI 0.18-0.28) before the start of therapy with bDMARDs and 29.1 per 100 pt-years (95% CI 0.18-0.43), p = 0.29 during IL17-i therapy. Occurrences of uveitis were observed in 4 of 57 patients (7%) during SEC therapy and in 1 of 25 (4%) patients during the NTK therapy. One case of new-onset uveitis was recorded during the using of SEC. There were no significant differences in the incidence rates of uveitis during IL17-i therapy compared with non-biological therapy. IL17-i therapy have not demonstrated a significant effect on the course of uveitis in AS in the study group.