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Panax ginseng induces production of proinflammatory cytokines via toll-like receptor.

机译:人参通过通行费样受体诱导促炎细胞因子的产生。

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摘要

Ginseng radix, the dried root of Panax ginseng C. A. Meyer, has been shown to enhance the ability to resist microbial infections. Proinflammatory cytokines, such as tumor necrosis factor-alpha (TNF-alpha), interleukin-1beta (IL-1beta), IL-6, and interferon-gamma (IFN-gamma) are produced by macrophages treated with ginseng radix extract (GRE) in vitro as well as in vivo. However, the molecular mechanisms of the production are still not clear. In the present study, we demonstrated that production of TNF-alpha and IFN-gamma was induced by GRE in spleen cells and peritoneal macrophages from C3H/HeN mice but was impaired in C3H/HeJ mice carrying a defective toll-like receptor-4 (TLR-4) gene. In addition to these cytokines, the expression of IFN-beta and inducible nitric oxide synthase (iNOS) mRNAs was also increased in GRE-treated C3H/HeN spleen cells. We investigated the possibility that GRE contains a lipopolysaccharide (LPS)-like component. However, GRE induced production of TNF-alpha and IFN-gamma in the presence of polymyxin B, an LPS inhibitor. Furthermore, a Limulus amebocyte lysate assay showed that the endotoxin content of GRE was below the threshold level of 1 ng/ml LPS. These results suggest that GRE contains a non-LPS agent that enhances innate immunity through production of proinflammatory cytokines via TLR-4.
机译:人参基(人参C. A. Meyer的干燥根)已显示出增强的抵抗微生物感染的能力。人参基提取物(GRE)处理的巨噬细胞产生促炎细胞因子,例如肿瘤坏死因子-α(TNF-alpha),白介素-1β(IL-1beta),IL-6和干扰素-γ(IFN-γ)。体外以及体内。但是,生产的分子机制仍不清楚。在本研究中,我们证明GRE在C3H / HeN小鼠的脾细胞和腹膜巨噬细胞中由GRE诱导了TNF-α和IFN-γ的产生,但在携带有缺陷的Toll样受体4( TLR-4)基因。除了这些细胞因子外,在GRE处理的C3H / HeN脾脏细胞中,IFN-β和诱导型一氧化氮合酶(iNOS)mRNA的表达也增加了。我们调查了GRE包含脂多糖(LPS)样成分的可能性。但是,在LPS抑制剂多粘菌素B存在下,GRE诱导了TNF-α和IFN-γ的产生。此外,Li变形细胞分析表明,GRE的内毒素含量低于1 ng / ml LPS的阈值水平。这些结果表明,GRE包含一种非LPS剂,可通过TLR-4产生促炎性细胞因子来增强先天免疫力。

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