Key clinical point: Peficitinib (ASP015K) showed improvement in clinical outcomes, which was maintained throughout the treatment duration of 32 months along with a generally tolerable safety profile in patients with rheumatoid arthritis (RA).
Major finding: The American College of Rheumatology (ACR)20, ACR50, and ACR70 response rates were maintained throughout from baseline (71.6%, 52.1%, and 34.7%, respectively) to the end of treatment (78.7%, 63.3%, and 44.1%, respectively). Treatment-emergent adverse events, mostly grade 1 or 2 in severity, were experienced by 94.4% of patients, leading to drug discontinuation in 16.6% of patients.
Study details : Findings are from the final analysis of an open-label long-term extension study involving 843 Asian patients with RA who previously completed phase 2b and phase 3 studies of peficitinib.
Disclosures: This work was funded by the Astellas Pharma, Inc. The authors including the lead author reported receiving grants, speaker’s fees, consultancy fees, personal fees, and/or honoraria from various sources including Astellas Pharma, Inc. Four of the authors reported being employees of Astellas Pharma, Inc.
Source: Takeuchi T et al. Rheumatol Ther. 2021 Mar 3. doi: 10.1007/s40744-021-00280-5 .