Long-Term Maintenance of Golimumab Effectiveness for Injection Spacing in Rheumatoid Arthritis Patients with Low Disease Activity Who Previously Received Other TNF Inhibitors: Minimum 2-year Data From an Observational Study

Background Golimumab (GLM) has been reported to have lower immunogenicity than do other TNF inhibitors used for treating rheumatoid arthritis (RA). We previously found a prolonged effect of and improvement similar to that associated with infliximab (IFX) after switching to subcutaneous GLM (GLM-SC) for control of RA activity or adverse events. Thus, this study aimed to evaluate the continued maintenance of treatment efficacy and safety for > 2 years by switching to GLM-SC in RA patients with low disease activity or in remission after previous treatment with another tumor necrosis factor (TNF) inhibitor. Methods Thirty-two patients treated with etanercept or infliximab were switched to GLM-SC and maintained low disease activity. The patients were divided into two groups (GLMq4w and GLMq8w) through discussion with each patient, considering their general condition and convenience. The groups included patients with low disease activity or in remission who switched to 50-mg GLM therapy at 4-week and 8-week intervals, respectively. Results The mean DAS28-ESR and DAS-CRP values in the GLMq4w group (17 patients) and GLMq8w group (15 patients) were maintained from baseline throughout the 104-week treatment period. Two patients from the GLMq4w group showed disease flaring to moderate disease activity. No serious adverse events occurred, and the treatment continuation rate at 104 weeks was 100% in both groups. After > 2 years of treatment, three patients in the GLMq8w group and one patient in the GLMq4w group discontinued GLM treatment due to relapse or complications. The 5-year survival rates were 88.2% and 75.5% in the GLMq4w and GLMq8w groups, respectively. The average treatment duration was 5.0 (2.0-7.5) years. Conclusion Administration of GLM-SC at 4-week and 8-week intervals after switching from TNF inhibitors showed sustained long-term efficacy and acceptable safety in RA patients with low disease activity.