Erik H Vogelzang1, Eva L Kneepkens1, Michael T Nurmohamed1, Arno W R van Kuijk1, Theo Rispens2, Gertjan Wolbink3, Charlotte L M Krieckaert1. 1. Department of Rheumatology, Jan van Breemen Research Institute | Reade, Amsterdam, The Netherlands. 2. Department of Immunopathology, Sanquin, Amsterdam, The Netherlands. 3. Department of Rheumatology, Jan van Breemen Research Institute | Reade, Amsterdam, The Netherlands Department of Immunopathology, Sanquin, Amsterdam, The Netherlands.
Abstract
OBJECTIVES: To investigate the relationship between antidrug antibodies (ADA), adalimumab concentrations and clinical response in patients with psoriatic arthritis (PsA) during 52 weeks of follow-up. METHODS: This prospective cohort study included 103 consecutive patients with PsA. Disease Activity Score of 28 joints (DAS28), Erythrocyte Sedimentation Rate, C reactive protein and Psoriasis Area and Severity Index were assessed. Adalimumab concentrations and ADA were measured in serum trough samples, using an ELISA and a radio immunoassay, respectively. RESULTS: Adalimumab concentrations were significantly lower at 28 and 52 weeks in patients with detectable ADA compared with patients without detectable ADA (at week 28: 1.3 mg/L (IQR 0.0-3.2) versus 8.7 mg/L (IQR 5.7-11.5), p<0.001; at week 52: 0.9 mg/L (IQR 0.0-2.9) vs 9.4 mg/L (IQR 5.7-12.1), p=0.0001). DAS28 at 28 weeks (2.16 vs 2.95, p=0.023) and 52 weeks (2.19 vs 2.95, p=0.024) showed a significant difference; patients with detectable ADA had a poorer clinical outcome than patients without. CONCLUSIONS: Patients with detectable ADA had lower adalimumab concentrations and a significantly poorer clinical outcome compared with patients in whom ADA were not detected. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.
OBJECTIVES: To investigate the relationship between antidrug antibodies (ADA), adalimumab concentrations and clinical response in patients with psoriatic arthritis (PsA) during 52 weeks of follow-up. METHODS: This prospective cohort study included 103 consecutive patients with PsA. Disease Activity Score of 28 joints (DAS28), Erythrocyte Sedimentation Rate, C reactive protein and Psoriasis Area and Severity Index were assessed. Adalimumab concentrations and ADA were measured in serum trough samples, using an ELISA and a radio immunoassay, respectively. RESULTS:Adalimumab concentrations were significantly lower at 28 and 52 weeks in patients with detectable ADA compared with patients without detectable ADA (at week 28: 1.3 mg/L (IQR 0.0-3.2) versus 8.7 mg/L (IQR 5.7-11.5), p<0.001; at week 52: 0.9 mg/L (IQR 0.0-2.9) vs 9.4 mg/L (IQR 5.7-12.1), p=0.0001). DAS28 at 28 weeks (2.16 vs 2.95, p=0.023) and 52 weeks (2.19 vs 2.95, p=0.024) showed a significant difference; patients with detectable ADA had a poorer clinical outcome than patients without. CONCLUSIONS:Patients with detectable ADA had lower adalimumab concentrations and a significantly poorer clinical outcome compared with patients in whom ADA were not detected. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.
Authors: Seemal R Desai; Ilona J Frieden; Joel M Gelfand; Whitney High; Arthur Kavanaugh; Ashfaq A Marghoob; David M Ozog; Ted Rosen; Linda Stein Gold; Bruce Strober; Neil Swanson; George Martin Journal: J Clin Aesthet Dermatol Date: 2015-09
Authors: George Martin; Bruce E Strober; Craig L Leonardi; Joel M Gelfand; Andrew Blauvelt; Arthur Kavanaugh; Linda Stein Gold; Brian Berman; Ted Rosen; Eggert Stockfleth Journal: J Clin Aesthet Dermatol Date: 2016-09-01
Authors: Eva L Kneepkens; Mieke F Pouw; Gerrit Jan Wolbink; Tiny Schaap; Michael T Nurmohamed; Annick de Vries; Theo Rispens; Karien Bloem Journal: Br J Clin Pharmacol Date: 2017-08-22 Impact factor: 4.335