Abstract
Hidradenitis suppurativa (HS) is a chronic skin disease, characterized by clinical inflammation of the hair follicle with the recurrence of abscesses, nodules, and tunnels. Recently, several studies suggested a role of IL-1 family (IL-1F) cytokines in eliciting and sustaining the disease. The aim of this work is to perform a comprehensive analysis of IL-1F cytokines, soluble inhibitors and receptors in a cohort of HS patients not treated with biological agents. Sixteen patients affected by HS and 16 healthy controls were recruited; clinical data were collected and disease severity evaluated by means of the International HS Severity Score System (IHS4). Serum levels of IL-1F cytokines, inhibitors and receptors were measured using a Multiplex Assays. IL-18 and free IL-18 levels were significantly higher in patients vs controls. Among soluble inhibitors, IL-1Ra, IL-1R2 and ST2/IL-1R4 were significantly increased. IL-18, free IL-18 and IL-33 levels are strongly correlated with IHS4. Also the inhibitors IL-1Ra and IL-18BP show a correlation with IHS4. The data obtained in this study confirm the involvement of IL-1F cytokines in mediating the disease and determining its severity and suggest a possible role for IL-18 as novel serum biomarker of active disease.
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