A Study to Evaluate Efficacy and Safety of ASP015K in Patients With Rheumatoid Arthritis (RA) Who Had an Inadequate Response to Methotrexate (MTX) Treatment

Summary

The objective of this study was to verify the efficacy of ASP015K versus placebo administrated in combination with methotrexate (MTX) over placebo in terms of efficacy in participants with rheumatoid arthritis (RA) who had an inadequate response to MTX

Timeline

Start

2014-07-25

Primary completion

2017-06-20

Completion

2017-11-28

Outcome

Met primary endpoint

paper Significantly more (p<0.001) peficitinib (58.6%, 100 mg; 64.4%, 150 mg) than placebo (21.8%) recipients achieved ACR20 response at week 12/ET. PMID 31350269 ↗

paper Significantly lower (p<0.001) mean changes from baseline in mTSS at week 28/ET occurred in peficitinib (1.62, 100 mg; 1.03, 150 mg) than placebo (3.37) recipients. PMID 31350269 ↗

Publications

• Tanaka Y, Takeuchi T, Kato D, Kaneko Y, Fukuda M, Izutsu H, Rokuda M, van der Heijde D. Post hoc analysis of clinical characteristics of patients with radiographic progression in a Japanese phase 3 trial of peficitinib and methotrexate treatment (RAJ4). Mod Rheumatol. 2023 Jan 3;33(1):73-80. doi: 10.1093/mr/roac021.
• Tanaka Y, Takeuchi T, Izutsu H, Kaneko Y, Kato D, Fukuda M, Rokuda M, Schultz NM. Patient- and physician-reported outcomes from two phase 3 randomized studies (RAJ3 and RAJ4) of peficitinib (ASP015K) in Asian patients with rheumatoid arthritis. Arthritis Res Ther. 2021 Aug 24;23(1):221. doi: 10.1186/s13075-021-02590-z.
• Toyoshima J, Kaibara A, Shibata M, Kaneko Y, Izutsu H, Nishimura T. Exposure-response modeling of peficitinib efficacy in patients with rheumatoid arthritis. Pharmacol Res Perspect. 2021 May;9(3):e00744. doi: 10.1002/prp2.744.
• Toyoshima J, Shibata M, Kaibara A, Kaneko Y, Izutsu H, Nishimura T. Population pharmacokinetic analysis of peficitinib in patients with rheumatoid arthritis. Br J Clin Pharmacol. 2021 Apr;87(4):2014-2022. doi: 10.1111/bcp.14605. Epub 2020 Dec 1.
• Takeuchi T, Tanaka Y, Tanaka S, Kawakami A, Iwasaki M, Katayama K, Rokuda M, Izutsu H, Ushijima S, Kaneko Y, Shiomi T, Yamada E, van der Heijde D. Efficacy and safety of peficitinib (ASP015K) in patients with rheumatoid arthritis and an inadequate response to methotrexate: results of a phase III randomised, double-blind, placebo-controlled trial (RAJ4) in Japan. Ann Rheum Dis. 2019 Oct;78(10):1305-1319. doi: 10.1136/annrheumdis-2019-215164. Epub 2019 Jul 26.

Drugs

Evaluation	Drug	Modality	Dose	Route
Subject	peficitinib	Small molecule	100 mg	Oral
Subject	peficitinib	Small molecule	150 mg	Oral
Background	Methotrexate	Small molecule	—	—

Indications