Circulating complexes between tumour necrosis factor-alpha and etanercept predict long-term efficacy of etanercept in juvenile idiopathic arthritis.
The relationship between tumour necrosis factor-alpha (TNF-α) and drug survival had not been studied in juvenile idiopathic arthritis (JIA) and there were no laboratory tests to predict the long-term efficacy of biological drugs for JIA. We studied if serum levels of TNF-α, free or bound to etanercept, could predict long-term efficacy of etanercept in children with JIA.
