April 2021

JAK selectivity and the implications for clinical inhibition of pharmacodynamic cytokine signalling by filgotinib, upadacitinib, tofacitinib and baricitinib

Ann Rheum Dis. 2021 Mar 19:annrheumdis-2020-219012. Epub ahead of print. DOI: 10.1136/annrheumdis-2020-219012

The first study to combine in vitro inhibition of cytokine responses in whole blood with clinical pharmacokinetics of individual JAKinibs to model daily cytokine-mediated pharmacodynamic profiles in healthy individuals and patients with RA, has demonstrated that JAKinib potencies depended on cytokine stimulus, pSTAT readout and cell type.Traves and colleagues have observed that JAKinibs have unique, differential effects on specific cytokine signalling pathways, dependent on cytokine stimulus, ST...

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March 2021

Upadacitinib in Rheumatoid Arthritis: A Benefit–Risk Assessment Across a Phase III Program

Drug Saf. 2021 Feb 2. DOI: 10.1007/s40264-020-01036-w

Upadacitinib 15 mg has a favourable benefit–risk profile according to an assessment of data from the phase III SELECT clinical trial programme.In this review of data for the once-daily, oral JAK inhibitor, Conaghan PG, et al. provided insights into the benefit–risk profile of upadacitinib in approximately 4400 patients with RA. Based on pooled data from five pivotal studies, benefits and risks were assessed up to the time of regulatory submission, and additional long-term integrated safety revie...

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Which Patient-reported Outcomes do Rheumatology Patients Find Important to Track Digitally? A Real-world Longitudinal Study in Arthritis Power

Arthritis Res Ther. 2021;23(1):53.

Fatigue, physical function, pain, and morning joint stiffness are the most important PROs to track, according to the rheumatology patients who experience these symptoms. Increasingly used, alongside clinical measures, to track symptoms and assess disease activity over time, patient-reported outcomes (PROs) are also important indicators of quality of life and treatment effectiveness. To enable us to better understand which PROs patients with rheumatic and musculoskeletal disease consider most imp...

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February 2021

Upadacitinib Monotherapy Versus Methotrexate Monotherapy in Methotrexate-naïve Japanese Patients with Rheumatoid Arthritis: A Sub-analysis of The Phase 3 SELECT-EARLY study

Mod Rheumatol 2021;26:1–16.

In this sub-analysis of the Phase 3 SELECT-EARLY study, UPA demonstrated clinical efficacy superior to placebo in the Japanese subpopulation. Along with a favourable efficacy observed with the Japan-specific 7.5 mg dose of UPA for all secondary endpoints. SELECT-EARLY was designed to study the safety and efficacy of UPA 15 and 30mg as monotherapy, but it also included a subset of 138 Japanese patients, 40% of whom were randomised to receive UPA 7.5mg. This was designed to meet the requirements o...

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January 2021

Upadacitinib for psoriatic arthritis refractory to biologics: SELECT-PsA 2

Annals of the rheumatic diseases. 2021 Mar 1;80(3):312-20.

In this trial of patients with active PsA who had inadequate response or intolerance to at least one biologic DMARD, upadacitinib 15 mg and 30 mg was more effective than placebo over 24 weeks in improving signs and symptoms of PsA. Despite the availability of bDMARDs in PsA, only a small proportion of patients achieve the recommended target of minimal disease activity; as such, additional treatment options are needed. Upadacitinib is under evaluation for PsA. This paper reports the 24-week data ...

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December 2020

Highlights of 2020

Please click the links below to go to the CSF review of each paper

2020 unfolded apace, dominated by COVID-19 - we have all had to adapt in our practice and in our knowledge base. Amid this there have continued to be a constant flow of publications and science in cytokine signaling, and as in previous years as we come the end of 2020, I will highlight some of the notable papers of the year. You can find the most notable papers, as selected by CSF Steering Committee Chair Professor Iain McInnes, with links to their respective detailed summaries below:

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Points to consider for the treatment of immune-mediated inflammatory diseases with Janus kinase inhibitors: a systematic literature research

RMD Open 2020;6:e001374 doi:10.1136/rmdopen-2020-001374

Trials of JAKi have been conducted in many therapy areas, including rheumatology, dermatology and gastroenterology. In 2019, a task force was set up to create a consensus to guide clinicians on how to use JAKi in clinical practice. This systematic literature review conducted in 2019 support this consensusIn line with EULAR’s standardised operating procedures for recommendations, a literature search was conducted in EMBASE, Medline and the Cochrane Library databases. To evaluate the efficacy of t...

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Switching between Janus kinase inhibitor upadacitinib and adalimumab following insufficient response: efficacy and safety in patients with rheumatoid arthritis

Ann Rheum Dis 2020; doi:10.1136/annrheumdis-2020-21841220

Both ACR and EULAR recommend adding a biologic or targeted synthetic DMARD in patients who do not achieve treatment goals at follow-up. Findings indicated that an immediate switch in mechanism of action (from JAKi to TNFi and vice versa) following treat-to-target principles is feasible with minimal risk of flare regardless of whether patients are switched due to non-response or incomplete-response.SELECT-COMPARE followed treat-to-target principles to examine the efficacy of switching in two pati...

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November 2020

Safety Profile of Upadacitinib in Rheumatoid Arthritis: Integrated Analysis from the SELECT Phase III Clinical Programme

Ann Rheum Dis 2020 DOI:10.1136/annrheumdis-2020-218510

This integrated Phase III safety analysis of UPA showed that UPA had a similar profile to ADA and MTX for serious infections, malignancies, and thromboembolic events. Patients receiving UPA had increased risk of HZ and creatine phosphokinase elevation versus ADA.This integrated Phase III safety analysis of UPA examined >3500 RA patients and 4000 patient-years of exposure. Data were pooled from 3834 patients in SELECT-NEXT, SELECT-BEYOND, SELECT-MONOTHERAPY, SELECT-COMPARE and SELECT-EARLY studie...

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October 2020

Preclinical characterisation of itacitinib, a Novel Selective Inhibitor of JAK1, for the Treatment of Inflammatory Diseases

European Journal of Pharmacology. 2020 Oct 15;885:173505. doi: 10.1016/j.ejphar.2020.173505

Itacitinib is an orally active JAK inhibitor and effectively delayed disease onset, reduced symptom severity, and accelerated recovery of inflammatory diseases in mouse models. Covington M et al demonstrated itacitinib’s high selectivity for JAK 1, its inhibition on IL-2 induced T cell proliferation and JAK/STAT signalling, its ability to also inhibit of the JAK/STAT pathway in response to IL-6 stimulation, and its effect on rat adjuvant induced arthritis model. The study used recombinant enzym...

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