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IL-18 is a pleiotropic immunoregulatory cytokine that has been described and implicated in the pathogenesis of a variety of inflammatory diseases.1–4
Studies in murine models of arthritis and clinical studies suggest that dendritic cells, macrophages and synoviocites within the synovial membrane can produce IL-18.1 5–7 IL-18 expression has in turn been implicated in the reciprocal regulation of other pro-inflammatory cytokines, such as tumour necrosis factor alpha.8
Recent data clearly demonstrated that IL-18 serum levels were significantly elevated in adult-onset Still’s disease (AOSD) and correlated with disease activity and serum ferritin levels.2–4 AOSD is characterised by substantial and dysregulated …
Footnotes
Competing interests: None.
Funding: PC is receiving fellowship support from the University of Glasgow. MB is receiving support from the Arthritis Research Campaign.