The concentrations of TNF-α, IL-6, and resistin were significantly higher in ERA patients than in the control subjects (p < 0.001 for TNF-α and IL-6, and p = 0.008 for resistin), but there were no differences in adiponectin and leptin concentrations between these groups. The gene discussed is LEP; the disease is enthesitis-related juvenile idiopathic arthritis.