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首页> 外文期刊>Cellular immunology >Echinacea purpurea root extract inhibits TNF release in response to Pam(3)Csk(4) in a phosphatidylinosito1-3-kinase dependent manner
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Echinacea purpurea root extract inhibits TNF release in response to Pam(3)Csk(4) in a phosphatidylinosito1-3-kinase dependent manner

机译:紫锥菊紫菜根提取物以磷脂酰肌醇1-3激酶依赖性方式抑制响应Pam(3)Csk(4)的TNF释放

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摘要

Polysaccharides derived from Echinacea have historically been shown to be immunostimulatory. We describe in this work however the anti-inflammatory effect of a water extract of Echinacea purpurea roots (EPRW) that inhibited Pam(3)Csk(4) stimulated production of TNF alpha by human monocytic THP-1 cells. The polyphenols and alkylamides typically found in Echinacea extracts were absent in EPRW suggesting that the anti-inflammatory component(s) was a polysaccharide. This anti-inflammatory activity was shown to be mediated by the phosphatidylinosito1-3-kinase (PI3K)/Akt signaling pathway as chemical inhibition of PI3K abolished the EPRW anti-inflammatory effect. Demonstration of phosphorylation of Akt and ribosomal S6 proteins, downstream targets of PI3K confirmed EPRW-mediated activation of this pathway. In conclusion, this observation suggests that non-alkylamideon-polyphenolic phytochemicals from Echinacea may contribute in part to some of the anti-inflammatory therapeutic effects such as reduced severity of symptoms that have been observed in vivo in the treatment of upper respiratory tract infections with Echinacea. (C) 2015 Elsevier Inc. All rights reserved.
机译:从历史上看,源自紫锥菊的多糖具有免疫刺激性。我们在这项工作中描述了紫锥菊紫锥花根水提取物(EPRW)抑制Pam(3)Csk(4)刺激人单核细胞THP-1细胞产生TNFα的抗炎作用。紫锥菊提取物中通常发现的多酚和烷基酰胺在EPRW中不存在,这表明抗炎成分是一种多糖。该抗炎活性被证明是由磷脂酰肌醇1-3激酶(PI3K)/ Akt信号传导途径介导的,因为对PI3K的化学抑制消除了EPRW的抗炎作用。 PI3K的下游目标Akt和核糖体S6蛋白的磷酸化的证明证实了EPRW介导的该途径的激活。总之,该观察结果表明,紫锥菊中的非烷基酰胺/非多酚类植物化学物质可能部分有助于某些抗炎治疗作用,例如在上呼吸道感染的体内观察到的症状严重程度降低。与紫锥菊。 (C)2015 Elsevier Inc.保留所有权利。

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