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Cytokine Modulation with Immune γ-Globulin in Peripheral Blood of Normal Children and Its Implications in Kawasaki Disease Treatment
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Cytokine Modulation with Immune γ-Globulin in Peripheral Blood of Normal Children and Its Implications in Kawasaki Disease Treatment
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Journal Article
Cytokine Modulation with Immune γ-Globulin in Peripheral Blood of Normal Children and Its Implications in Kawasaki Disease Treatment
2001
Overview
Intravenous immune gamma-globulin (IVIG) is used successfully in the treatment of Kawasaki disease, with dose-dependent rapid resolution of symptoms such as fever and irritability and a decrease in ESR, WBCs, and platelets. The mode of action of IVIG in reducing this inflammatory response is not clearly understood. Recently anticytokine antibodies in IVIG have been demonstrated. Serum levels of proinflammatory cytokines have been shown to be elevated in patients with Kawasaki disease. The cytokine interleukin-6 (IL-6) is involved in the de novo production of acute-phase proteins by hepatocytes and cause thrombocytosis and fever in response to tissue injury. Patients receiving parenteral recombinant human IL-6 have dose-dependently experienced fever, malaise, chills, and acute-phase reaction. With high IL-6 concentrations, central nervous system toxicity has also been reported and IL-6 has been thought to mediate endothelial damage. We evaluated the response of stimulated blood cells of 12 normal children to IVIG in the release of the cytokines IL-6, IL-8, TNF-alpha. and IL-6 receptor (sIL-6R). The levels of cytokines IL-6, IL-8, and TNF-alpha (but not sIL-6R) in peripheral blood induced by stimulation with LPS were markedly reduced (P < 0.008) within 3 hr when incubated with IVIG compared to without IVIG. Thus we demonstrated that cells of normal children respond to IVIG in vitro by reducing cytokines such as IL-8, TNF-alpha, and IL-6 without affecting the level of receptor sIL-6R during an acute inflammatory response. We also found significantly higher IL-6 levels in children with Kawasaki disease compared to children with blood culture-negative febrile illnesses. In five children with Kawasaki disease we measured serum IL-6 before and after IVIG and assessed the clinical response to IVIG therapy. Therapy with IVIG was followed by a rapid resolution of symptoms in Kawasaki disease, with a significant decrease in serum IL-6. The attenuation of proinflammatory cytokine responses, especially IL-6, following infusions of IVIG may play an integral role in the rapid resolution of symptoms and decrease in the acute-phase proteins in children with Kawasaki disease. Cells of normal children were found to respond to the IVIG in a manner similar to that of the Kawasaki children.
Publisher
Kluwer/Plenum
Subject
