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EULAR 2017 | Daily Highlights
EFFICACY AND SAFETY OF TOFACITINIB, AN ORAL JANUS KINASE INHIBITOR, OR ADALIMUMAB IN PATIENTS WITH ACTIVE PSORIATIC ARTHRITIS AND AN INADEQUATE RESPONSE TO CONVENTIONAL SYNTHETIC DISEASE-MODIFYING ANTIRHEUMATIC DRUGS (CSDMARDS): A RANDOMISED, PLACEBO-CONTROLLED, PHASE 3 TRIAL
Abstract: OP0216Authors: P. J. Mease1,*, S. Hall2, O. FitzGerald3, D. van der Heijde4, J. F. Merola5, F. Avila-Zapata6, D. Cieslak7, D. Graham8, C. Wang8, S. Menon8, T. Hendrikx9, K. S. Kanik8
1Swedish Medical Center and University of Washington, Seattle, WA, United States, 2Cabrini Health and Monash University, Melbourne, Australia, 3Department of Rheumatology, St Vincent’s University Hospital, Dublin, Ireland, 4Leiden University Medical Center, Leiden, Netherlands, 5Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States, 6Centro Multidisciplinario para el Desarrollo Especializado de la Investigacion Clinica en Yucatán S.C.P, Yucatán, Mexico, 7Poznan University, Poznan, Poland, 8Pfizer Inc, Groton, CT, 9Pfizer Inc, Collegeville, PA, United States
Background
Tofacitinib is an oral Janus kinase inhibitor under investigation for treatment of psoriatic arthritis (PsA).
Objectives
To assess the efficacy and safety of tofacitinib vs placebo (PBO) in patients (pts) with active PsA.
Methods
Eligible pts in this randomised, PBO- and active-controlled, 12-month Phase 3 trial had ≥6-months' PsA diagnosis, fulfilled CASPAR criteria, had active arthritis (≥3 tender/painful and ≥3 swollen joints) and active plaque psoriasis at screening, inadequate response to ≥1 csDMARD, and were tumour necrosis factor-inhibitor (TNFi)-naïve. 422 pts were randomised 2:2:2:1:1 to tofacitinib 5 or 10 mg twice daily (BID), adalimumab 40 mg subcutaneous injection every 2 weeks, or PBO (advancing to tofacitinib 5 or 10 mg BID at Month [M]3). Stable treatment with 1 csDMARD was required. Primary endpoints comparing tofacitinib vs PBO were ACR20 response rate and change from baseline in Health Assessment Questionnaire Disability Index (∆HAQ-DI) at M3. Secondary endpoints included: ACR20 response rates and ∆HAQ-DI through M12; pts achieving ACR50, ACR70, ≥75% improvement of PASI and PsARC at all time points; and changes from baseline in LEI, Dactylitis Severity Score and SPARCC Enthesitis Index. Radiographic progression was assessed by van der Heijde-modified Total Sharp Score (mTSS).
Results
96.9% of pts were white and 53.3% were female; mean age was 47.9 years. 96.2% and 88.4% of pts completed M3 and M12, respectively. At M3, tofacitinib 5 and 10 mg BID significantly improved ACR20 response rates (50.5% [p≤0.05] and 60.6% [p<e;0.0001] vs 33.3%; Fig 1A) and ∆HAQ-DI (-0.35 [p≤0.05] and -0.40 [p<e;0.001] vs -0.18; Fig 1B) vs PBO, with responses maintained to M12 (Fig 1C&D). Greater efficacy was also seen for adalimumab vs PBO. Tofacitinib 5 and 10 mg BID were superior to PBO for ACR20 response rates at Week 2 (22.4% [p<e;0.001] and 31.7% [p<e;0.0001] vs 5.7%; Fig 1C). Secondary endpoints supported primary findings (data not shown). >91% of pts were radiographic non-progressors at M12 (defined as an increase from baseline in mTSS ≤0.5). M12 safety findings were similar between groups (Fig 1E). The most common adverse events were upper respiratory tract infection (7.5–10.6%), nasopharyngitis (7.5–11.5%) and headache (3.8–10.6%).
Image/graph:

Conclusions
In TNFi-naïve pts with active PsA, tofacitinib was superior to PBO in ACR20 response rates and ∆HAQ-DI at M3, with superiority vs PBO as early as Week 2 for ACR20, which was maintained to M12. No new safety risks were identified vs previous studies in other indications.
Acknowledgements
Previously presented at ACR 2016, to be presented at AAD 2017 and reproduced with permissions. This study was sponsored by Pfizer Inc. Editorial support was provided by AG McCluskey of CMC and was funded by Pfizer Inc.
Disclosure of Interest:
P. Mease Grant/research support from: AbbVie, Amgen, Bristol-Myers Squibb, Celgene, Eli Lilly, Janssen, Novartis, Pfizer Inc, Sun, UCB, Consultant for: AbbVie, Amgen, Bristol-Myers Squibb, Celgene, Crescendo, CORRONA, Dermira, Janssen, Eli Lilly, Merck, Novartis, Pfizer Inc, Sun, UCB, Zynerba, Speakers bureau: AbbVie, Amgen, Bristol-Myers Squibb, Celgene, Crescendo, Genentech, Janssen, Novartis, Pfizer Inc, UCB, S. Hall Consultant for: AbbVie, Celgene, Eli Lilly, Janssen, Pfizer Inc, Roche, O. FitzGerald Grant/research support from: AbbVie, Bristol-Myers Squibb, Consultant for: Bristol-Myers Squibb, Eli Lilly, Janssen, Pfizer Inc, Speakers bureau: Celgene, Janssen, Novartis, D. van der Heijde Consultant for: AbbVie, Amgen, Astellas, AstraZeneca, Bristol-Myers Squibb, Boehringer Ingelheim, Celgene, Daiichi, Eli Lilly, Galapagos, Janssen, Merck, Novartis, Pfizer Inc, Roche, Sanofi-Aventis, UCB, Employee of: Imaging Rheumatology BV, J. Merola Grant/research support from: Biogen Idec, Consultant for: AbbVie, Amgen, Biogen Idec, Eli Lilly, Janssen, Momenta, Mallinckrodt, Novartis, Pfizer Inc, Speakers bureau: AbbVie, Eli Lilly, F. Avila-Zapata: None declared, D. Cieslak: None declared, D. Graham Shareholder of: Pfizer Inc, Employee of: Pfizer Inc, C. Wang Shareholder of: Pfizer Inc, Employee of: Pfizer Inc, S. Menon Shareholder of: Pfizer Inc, Employee of: Pfizer Inc, T. Hendrikx Shareholder of: Pfizer Inc, Employee of: Pfizer Inc, K. Kanik Shareholder of: Pfizer Inc, Employee of: Pfizer Inc
DOI: 10.1136/annrheumdis-2017-eular.1416
Comment:
This study represents a “pseudo”-head-to-head trial, as although adalimumab was included in this Tofacitinib trial as an active control, any formal comparison is carefully avoided. The study was not designed with the statistical power for comparing tofacitinib and adalimumab against each other, but only for comparing each of the active drugs against a common placebo group. Both tofacitinib and adalimumab showed in combination with a continued conventional DMARD a significant ACR20 response against placebo at 3 months, of comparable relative magnitude. The data presented in the abstract does not allow conclusive interpretation of efficacy on other musculoskeletal manifestations of psoriatic arthritis. Only a longer follow-up will, moreover, provide relevant information on potential inhibition of radiographic progression.

PD Dr. Adrian Ciurea
UniversitätsSpital Zürich
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