Analysis of plasma multiplex cytokines for children with febrile seizures and severe acute encephalitis.

We investigated the plasma cytokine profiles of children with febrile seizures or severe acute encephalitis using multiplex cytometry to evaluate the role of cytokines in these diseases. Interleukin-6, -10, -12p70, -17A, -2, -4, -5, -9, -13, -22, and -1β, interferon-γ, and tumor necrosis factor-α were measured in the plasma from children with febrile seizures (n = 9) or severe acute encephalitis (n = 21). In multivariate analysis, interleukin-6 was significantly increased in the plasma of the febrile seizure patients compared to those with severe acute encephalitis, suggesting that interleukin-6 is activated during the acute stage of a febrile seizure. A lower plasma interleukin-6 concentration was significantly associated with severe acute encephalitis. The cytokine network may be deregulated in severe acute encephalitis via the persistence of an uncontrolled inflammatory state in the brain.