Differential effects of ethanol on glial signal transduction initiated by lipopolysaccharide and interferon-γ

被引:8
作者
Choi, DK
Lee, H
Jeong, J
Lim, B
Suk, K
机构
[1] Kyungpook Natl Univ, Sch Med, Dept Pharmacol, Taegu 700422, South Korea
[2] Konkuk Univ, Dept Biotechnol, Chungju, South Korea
关键词
glia; ethanol; cellular activation; inflammation; signal transduction;
D O I
10.1002/jnr.20647
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Although the pathogenic effects of alcohol abuse on brain are well established, its specific effects on the intracellular signal transduction pathways of glial cells in the central nervous system (CNS) are poorly understood. In this study, we evaluated how ethanol affects the glial signal transduction associated with inflammatory activation. Lipopolysaccharide (LIPS), gangliosides, and interferon (IFN)-gamma induced the inflammatory activation of glia, which was differentially influenced by ethanol: 1) ethanol inhibited LPS- or gangliosides-induced, but not IFN gamma-induced, glial activation as demonstrated by the production of nitric oxide and the expression of inflammatory genes such as interleukin-1 beta, tumor necrosis factor-alpha, IP-10, and CD86; 2) nuclear factor (NF)-kappa B or JAK/STAT1 pathway was necessary for LPS- or IFN gamma-induced glial activation, respectively; 3) ethanol inhibited LPS-induced NF-kappa B activation; and 4) ethanol did not significantly affect IFN gamma-induced STAT1/IRF-1 activation. Based on these results, ethanol seems to inhibit selectively some parts of the glial signal transduction pathways that are associated with inflammatory activation, which may lead to the deregulation of CNS inflammatory responses. (c) 2005 Wiley-Liss, Inc.
引用
收藏
页码:225 / 231
页数:7
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