Low Serum IGF-1 in Boys with Recent Onset of Juvenile Idiopathic Arthritis.

Background: Liver-derived insulin-like growth factor-1 (IGF-1) contributes bone formation. Decreased IGF-1 levels are common in juvenile idiopathic arthritis (JIA), but whether IGF-1 is related to sex and differ during the pathogenic progress of JIA is unknown.

Objective: The aim of this study was to examine IGF-1 levels in boys and girls with newly diagnosed JIA, with established JIA and in controls.

High mobility group box protein 1-A prognostic marker for structural joint damage in 10-year follow-up of patients with juvenile idiopathic arthritis.

Objective: High mobility group box protein 1 (HMGB1) is an important pro-inflammatory mediator in adult rheumatoid arthritis. The diagnostic utility of HMGB1 in Juvenile Idiopathic Arthritis (JIA) is still unclear. The aim was to examine whether serum HMGB1 levels are associated with inflammation, radiological disease progression, and long-term prognosis in JIA.