JAK Inhibition as a Therapeutic Strategy for Immune and Inflammatory Diseases

Nat Rev Drug Discov 2017;16:843–62 DOI: 10.1038/nrd.2017.201

Janus kinases (JAKs) are essential mediators of downstream signaling pathways in many inflammatory and autoimmune diseases. This review summarizes current clinical data on first- and second-generation JAK inhibitors (jakinibs) and discusses their use for the treatment of immune and inflammatory conditions.First generation jakinibs such as tofacitinib, baricitinib, and ruxolitinib, non-selectively inhibit JAK-dependent pro-inflammatory cytokines, which are major contributors to immunopathology. T...

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November 2017

Safety and Efficacy of Baricitinib in Elderly Patients with Rheumatoid Arthritis

RMD Open. 2017; 3(2): e000546. doi: 10.1136/rmdopen-2017-000546

In this post hoc analysis of pooled data from two randomised controlled trials, RA-BUILD and RA-BEAM, age was shown not to be a contraindication for use of baricitinib. Patients in RA-BUILD were csDMARD-inadequate responder(IR) patients who received an oral placebo or 2 mg or 4 mg baricitinib once daily. Patients in RA-BEAM were MTX-IR patients and received an oral placebo, 4 mg baricitinib once daily or subcutaneous adalimumab every 2 weeks. Efficacy and safety of baricitinib in elderly patient...

October 2017

RA-BEGIN was a Phase 3, double-blind randomised active comparator-controlled study to evaluate baricitinib as monotherapy or in combination with MTX in patients with active RA who were naïve to csDMARDS and bDMARDS. In this analysis of the RA-BEGIN study, baricitinib alone or with MTX when used as initial therapy resulted in significant improvements in most patient-reported outcome measures compared with MTX. At baseline, study participants had active RA, impaired physical function, moderate le...

September 2017

This paper describes the patient-reported outcome (PRO) data collected in RA-BEAM, a Phase 3 study of baricitinib compared with both placebo and adalimumab in patients with RA and an inadequate response to MTX.PRO measures evaluated include health-related quality of life (HRQOL), physical function, disability, fatigue, sleep, mental health status, work productivity and work activity impairment. The RA-BEAM study demonstrated that patients treated with baricitinib experienced a greater improveme...
This open-label extension (OLE) of a Phase 2b randomised controlled trial (RCT) found that safety data collected over 2 years of treatment were generally consistent with previous findings for baricitinib in RA.In the RCT, baricitinib demonstrated significant improvement in disease activity compared with placebo and an acceptable safety profile in patients with RA and an inadequate response to MTX. Patients who completed the 24-week double-blind period of the study were eligible for the OLE. Rate...

April 2017

The EULAR 2016 recommendations update, based on three systematic literature reviews (SLRs) and expert opinion, comprises four overarching principles and 12 recommendations compared with 14, respectively, in 2013. These recommendations intend to inform regarding EULAR’s most recent consensus on the management of RA, with the aim of attaining the best outcomes with current therapies.All DMARD types: csDMARDs, bDMARDs, tsDMARD and bsDMARD are addressed, and cost aspects are taken into consideration...

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February 2017

Baricitinib improved symptoms of RA in the RA-BUILD trial, a Phase 3 study of baricitinib in patients with moderately to severely active RA, refractory to or intolerant to csDMARDs. As well as providing a short-term (24 weeks) benefit, there appeared to be joint damage benefit, considered a marker of long-term disability.RA-BUILD was a 24-week randomised, double-blind, placebo-controlled parallel-group study. Patients were randomised 1:1:1 to receive once-daily doses of placebo (n=228) or barici...

January 2017

In this analysis of the effect of baricitinib on changes in lipid profile, lipoprotein particle size and apolipoprotein content, increases in serum lipids were observed with HDL-C increases correlating with improved clinical outcomes.Eligible patients (N=301) met the inclusion criteria for the Phase 2b randomised, double-blind, placebo-controlled study.1 Patients were assigned in a 2:1:1:1:1 ratio to once-daily doses of placebo or baricitinib 1, 2, 4, or 8 mg, respectively. Those receiving 2 mg,...