Lipoteichoic acid from viridans streptococci induces the production of tumor necrosis factor and nitric oxide by murine macrophages.

Lipoteichoic acid from viridans streptococci induces the production of tumor necrosis factor and nitric oxide by murine macrophages.
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来自草绿色链球菌的脂磷壁酸诱导小鼠巨噬细胞产生肿瘤坏死因子和一氧化氮。

DOI:
10.1093/infdis/174.6.1348
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发表时间:
1996
期刊:
The Journal of infectious diseases
影响因子:
--
通讯作者:
Shenep,JL
Shenep,JL
中科院分区:
--
文献类型:
--
作者:
English,BK;Patrick,CC;Orlicek,SL;McCordic,R;Shenep,JL

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细菌内毒素或脂多糖是革兰氏阴性菌的主要促炎成分,但革兰氏阳性菌中触发炎症级联反应的成分知之甚少。从2株草绿色链球菌中纯化的脂磷壁酸(LTA)以剂量和时间依赖性方式诱导小鼠巨噬细胞系RAW 264.7产生肿瘤坏死因子(TNF)mRNA和蛋白。此外,在存在重组干扰素-γ的情况下,来自两种草绿色链球菌菌株的LTA引起诱导型一氧化氮(NO)合酶mRNA的积累和NO的产生。这些观察结果一起表明,LTA可以触发巨噬细胞活化和TNF和NO的产生,并表明LTA可能是宿主对革兰氏阳性菌感染的炎症反应的重要决定因素。
Bacterial endotoxin or lipopolysaccharide is the major proinflammatory component of gramnegative bacteria, but the components of gram-positive bacteria that trigger the inflammatory cascade are poorly understood. Lipoteichoic acid (LTA) purified from 2 strains of viridans streptococci induced the accumulation of tumor necrosis factor (TNF) mRNA and protein by the murine macrophage cell line RAW 264.7 in a dose- and time-dependent manner. Furthermore, in the presence of recombinant interferon-γ, LTA from both strains of viridans streptococci provoked the accumulation of inducible nitric oxide (NO) synthase mRNA and the production of NO. Together these observations indicate that LTA can trigger macrophage activation and the production of TNF and NO and suggest that LTA may be an important determinant of the host inflammatory response to gram-positive infection.
金黄色葡萄球菌和外毒素通过一氧化氮合成途径诱导巨噬细胞杀寄生虫活性。
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