alexa Interleukin-18 in hemophagocytic lymphohistiocytosis.


Journal of Blood Disorders & Transfusion

Author(s): Takada H, Nomura A, Ohga S, Hara T

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Abstract Hemophagocytic lymphohistiocytosis (HLH) is characterized by dysregulated hyperactivation of macrophages and T helper 1 (Th1) cells accompanied by excessive secretion of inflammatory cytokines. Although TNF-alpha and IFN-gamma are known to be important factors for the development of the disease, the mechanism of their overproduction has not been clarified, yet. We measured serum IL-18 levels of patients with HLH to investigate the possible significance of IL-18 in its pathophysiology, especially in IFN-gamma production. IL-18 levels were significantly increased in all patients with HLH compared with healthy controls. A significant correlation was observed between IL-18 and IFN-gamma levels. In addition to IFN-gamma and soluble Fas ligand (sFasL), IL-18 levels significantly correlated with disease activity. IL-18 may play important roles in the pathogenesis of HLH, particularly through induction of Th1 cells. In addition, IL-18 measurement may not only be useful for the diagnosis, but also for the evaluation of disease activity. This article was published in Leuk Lymphoma and referenced in Journal of Blood Disorders & Transfusion

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