June 2017

Filgotinib (GLPG0634/GS-6034), an oral selective JAK1 inhibitor, is effective as monotherapy in patients with active rheumatoid arthritis: results from a randomised, dose-finding study (DARWIN 2)

Ann Rheum Dis 2017;76:1009–19

In these two Phase 2b studies, filgotinib (a selective JAK-1 inhibitor) was shown to improve the signs and symptoms of RA (compared with placebo), either as monotherapy or when added to MTX.DARWIN 1 included 594 patients with moderate to severe RA on a stable dose of MTX, while DARWIN 2 included 283 patients who stopped taking MTX before the start of the study. After 12 weeks’ treatment, significantly more patients who were receiving filgotinib 100 mg or 200 mg daily in DARWIN 1 or any filgotini...

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Filgotinib (GLPG0634/GS-6034), an oral JAK1 selective inhibitor, is effective in combination with methotrexate (MTX) in patients with active rheumatoid arthritis and insufficient response to MTX: results from a randomised, dose-finding study (DARWIN 1)

Ann Rheum Dis 2017;76:998–100

In these two Phase 2b studies, filgotinib (a selective JAK-1 inhibitor) was shown to improve the signs and symptoms of RA (compared with placebo), either as monotherapy or when added to MTX.DARWIN 1 included 594 patients with moderate to severe RA on a stable dose of MTX, while DARWIN 2 included 283 patients who stopped taking MTX before the start of the study. After 12 weeks’ treatment, significantly more patients who were receiving filgotinib 100 mg or 200 mg daily in DARWIN 1 or any filgotini...

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March 2015

Pharmacokinetics and Pharmacokinetic/Pharmacodynamic Modeling of Filgotinib (GLPG0634), a Selective JAK1 Inhibitor, in Support of Phase IIB Dose Selection

Clin Pharmacokinet. 2015 Feb 14. [Epub ahead of print]

Filgotinib (GLPG0634) is a selective inhibitor of JAK1 currently in development for the treatment of RA and Crohn’s disease. This paper describes the pharmacokinetics of filgotinib and its active metabolite, as well as the PK/PD modelling to support dose selection for phase IIB.

Two phase I, randomised, double-blind, placebo-controlled trials in healthy volunteers and one phase IIa proof-of-concept study in RA patients were used to evaluate single and multiple doses of filgotinib.

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October 2013

Preclinical characterization of GLPG0634, a selective inhibitor of JAK1, for the treatment of inflammatory diseases

Journal of Immunology 2013;191:3568–77

JAK inhibitors have been identified as having a critical role as therapeutic targets for autoimmune, inflammatory and oncological diseases. GLPG0634 was shown to inhibit JAK1/JAK2 but with a much greater effect on JAK1, a critical pathway in the signal transduction of many inflammatory cytokines. In rodent testing, GLPG0634 showed significant dose-dependent reduction in disease progression in collagen-induced arthritis models, with comparable efficacy to etanercept. An orally bioavailable treatm...

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