Dual inhibition of tumour necrosis factor and interleukin-17A with ABT-122: open-label long-term extension studies in rheumatoid arthritis or psoriatic arthritis. Rheumatology (Oxford, England) Genovese, M. C., Weinblatt, M. E., Mease, P. J., Aelion, J. A., Peloso, P. M., Chen, K., Li, Y., Liu, J., Othman, A. A., Khatri, A., Mansikka, H. T., Leszczynski, P. 2018


Objectives: To evaluate the safety and maintenance of efficacy with ABT-122, a bi-specific monoclonal antibody targeting TNF and IL-17A, in patients with RA or PsA in open-label, 24-week extensions [open-label extensions (OLEs)] of 12-week, randomized, double-blind studies.Methods: All patients received ABT-122 (RA, 120 mg; PsA, 240 mg) subcutaneously every other week on background MTX. Safety assessments included adverse events (AEs) and laboratory parameters. Efficacy was evaluated with ACR responses, 28-joint DAS using high-sensitivity CRP [DAS28 (hsCRP)], and Psoriasis Area and Severity Index (PsA study).Results: The RA OLE study enrolled 158 patients; the PsA OLE study enrolled 168 patients. In the RA OLE study, the incidence of treatment emergent AEs (TEAEs; 41%) appeared similar to the double-blind study (36-43%). In the PsA OLE study, 57% of patients reported ?1 TEAE (double-blind study, 42-53%). Most TEAEs were mild or moderate in severity. There were no neutrophil abnormalities greater than grade 2. Grade 3 and/or 4 laboratory abnormalities were reported for lymphocytes, alanine aminotransferase, aspartate aminotransferase, bilirubin and haemoglobin; the number of these severe laboratory values was low (0.6-3.0%), except grade 3 lymphocyte count decreased (11.5%) in the RA study. In both OLE studies, efficacy assessed by ACR responses and other disease activity scores was maintained over the 24 weeks.Conclusion: ABT-122 demonstrated acceptable tolerability and maintenance of efficacy for up to 36 weeks in patients with RA or PsA receiving background MTX.Trial registration: ClinicalTrials.gov, http://clinicaltrials.gov, NCT02433340 and NCT02429895.

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