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  • Title: Tumour necrosis factor (TNF)-blocking agents in juvenile psoriatic arthritis: are they effective?
    Author: Otten MH, Prince FH, Ten Cate R, van Rossum MA, Twilt M, Hoppenreijs EP, Koopman-Keemink Y, Oranje AP, de Waard-van der Spek FB, Gorter SL, Armbrust W, Dolman KM, Wulffraat NM, van Suijlekom-Smit LW.
    Journal: Ann Rheum Dis; 2011 Feb; 70(2):337-40. PubMed ID: 21068101.
    Abstract:
    OBJECTIVES: To evaluate the effectiveness of tumour necrosis factor (TNF) blockers in juvenile psoriatic arthritis (JPsA). METHODS: The study was a prospective ongoing multicentre, observational study of all Dutch juvenile idiopathic arthritis (JIA) patients using biologicals. The response of arthritis was assessed by American College of Rheumatology (ACR) paediatric response and Wallace inactive disease criteria. The response of psoriatic skin lesions was scored by a 5-point scale. RESULTS: Eighteen JPsA patients (72% female, median age onset 11.1 (range 3.3-14.6) years, 50% psoriatic skin lesions, 39% nail pitting, 22% dactylitis) were studied. The median follow-up time since starting anti-TNFα was 26 (range 3-62) months. Seventeen patients started on etanercept and one started on adalimumab. After 3 months of treatment 83% of the patients achieved ACR30 response, increasing to 100% after 15 months. Inactive disease reached in 67% after 39 months. There was no discontinuation because of inefficacy. Six patients discontinued treatment after a good clinical response. However, five patients flared and restarted treatment, all with a good response. During treatment four patients (two JPsA and two JIA patients with other subtypes) developed de novo psoriasis. In four of the nine patients the pre-existing psoriatic skin lesions improved. CONCLUSION: Anti-TNFα therapy in JPsA seems effective in treating arthritis. However, in most patients the arthritis flared up after treatment discontinuation, emphasising the need to investigate optimal therapy duration. The psoriatic skin lesions did not respond well and four patients developed de novo psoriasis.
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