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Scand J Rheumatol ; 44(5): 359-62, 2015.
Article in English | MEDLINE | ID: mdl-25974288

ABSTRACT

OBJECTIVES: We aimed to determine how loss of response (LOR) to adalimumab (ADA) in juvenile idiopathic arthritis (JIA) may be related to anti-ADA antibodies (AAA). METHOD: AAA and ADA levels were measured in 23 consecutive patients with JIA responding significantly to treatment with ADA. RESULTS: Six out of 23 (26%) patients developed AAA and had low ADA levels. Five out of six AAA-positive patients experienced LOR. In these patients use of concomitant methotrexate (MTX) was significantly lower. CONCLUSIONS: The occurrence of AAA is a frequent event associated with LOR. Monitoring of AAA and serum ADA levels should be considered in JIA patients under ADA therapy.


Subject(s)
Adalimumab/immunology , Adalimumab/therapeutic use , Antibodies, Anti-Idiotypic/blood , Antirheumatic Agents/immunology , Antirheumatic Agents/therapeutic use , Arthritis, Juvenile/drug therapy , Adalimumab/blood , Adolescent , Antibodies, Anti-Idiotypic/immunology , Antirheumatic Agents/blood , Arthritis, Juvenile/blood , Arthritis, Juvenile/immunology , Biomarkers/blood , Child , Drug Therapy, Combination , Female , Humans , Male , Methotrexate/therapeutic use , Severity of Illness Index , Treatment Failure , Treatment Outcome , Tumor Necrosis Factor-alpha/antagonists & inhibitors
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