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KMID : 0923620120120020048
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Immune Network
2012 Volume.12 No. 2 p.48 ~ p.57
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The Roles and Perspectives of Toll-Like Receptors and CD4＋ Helper T Cell Subsets in Acute Viral Encephalitis
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Han Young-Woo
Sunit K. Singh
Eo Seong-Kug
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Abstract
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Acute viral encephalitis caused by neurotrophic viruses, such as mosquito-borne flaviviruses, is an emerging and re-emerging disease that represents an immense global health problem. Considerable progression has been made in understanding the pathogenesis of acute viral encephalitis, but the immune-pathological processes occurring during the progression of encephalitis and the roles played by various molecules and cellular components of the innate and adaptive systems still remain undefined. Recent findings reveal the significant contribution of Toll-like receptors (TLRs) and regulatory CD4＋ T cells in the outcomes of infectious diseases caused by neurotrophic viruses. In this review, we discuss the ample evidence focused on the roles of TLRs and CD4＋ helper T cell subsets on the progression of acute viral encephalitis. Finally, we draw attention to the importance of these molecules and cellular components in defining the pathogenesis of acute viral encephalitis, thereby providing new therapeutic avenues for this disease.
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KEYWORD
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Toll-like receptors, CD4＋ Th subsets, Acute viral encephalitis, Japanese encephalitis virus, West Nile virus, Dengue virus
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