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Microbiol Immunol. 1990;34(5):459-66.

Effect of cytokines on Japanese encephalitis virus production by human monocytes.

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1
First Department of Internal Medicine, School of Medicine, Ehime University.

Abstract

Japanese encephalitis (JE) virus was shown to grow in in vitro cultures of human monocytes. Interferon (IFN)-alpha and IFN-gamma inhibited JE virus production by the infected monocytes in the absence of anti-JE virus antibody, but interleukin (IL)-1 alpha, IL-2, IL-3, granulocyte-macrophage colony-stimulating factor (GM-CSF), granulocyte-CSF (G-CSF), and tumor necrosis factor (TNF)-alpha did not show a significant inhibition. Antibody against JE virus increased the JE virus production by the infected monocytes probably by enhanced uptake of virus-antibody complexes via Fc receptors. IFN-gamma and GM-CSF increased JE virus production by monocytes in the presence of anti-JE virus antibody, whereas IFN-alpha inhibited JE virus production even in the presence of the antibody. The other 5 cytokines (IL-1 alpha, IL-2, IL-3, G-CSF, and TNF-alpha) did not show a significant effect on JE virus production by monocytes in the presence or absence of the antibody.

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