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Immunomodulatory activity of Melaleuca alternifolia concentrate (MAC): Inhibition of LPS-induced NF-kappa B activation and cytokine production in myeloid cell lines

机译:Melaleuca的免疫调节活动exterfolia浓缩物(Mac):抑制LPS诱导的NF-κB活化和细胞因子产生的骨髓细胞系

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Melaleuca alternifolia concentrate (MAC) is a mixture predominantly composed of monoterpenoids and sesquiterpenes, refined from the essential oil of the tea tree by removing up to 99% of the more toxic, hydrophobic monoterpenes. MAC was examined here for its immunomodulatory effects on the human THP1 and murine RAW264.7 myeloid leukemic cell lines as models for macrophage-like cells. Firstly, MAC levels were determined that did not affect either the survival or proliferation of these cell lines in vitro. Next, the levels of lipopolysaccharide (LPS)-induced production of cytokines (IL-6, TNF alpha, IL-10, GM-CSF, IFN gamma and IL-3) were examined from the myeloid cell lines using multiplex assays. Many of the LPS-inducible cytokines produced by either cell lines could be significantly inhibited by MAC. Closer examination of the mechanism of action of MAC showed that it inhibited the LPS-induced activation of I kappa B phosphotylation and nuclear factor (NF)-kappa B signalling and translocation, inhibiting iNOS protein expression and NO production. These results demonstrate that MAC exerts its immunomodulatory effects by inhibiting NF-kappa B signalling activation and levels of cytokine production by macrophage-like cell lines. Crown Copyright (c) 2015 Published by Elsevier B.V. All rights reserved.
机译:Melaleuca alletifolia浓缩物(Mac)是一种主要由单萜类化合物和Sesquiterpenes组成的混合物,通过除去高达99%的毒性疏水的单口萜烯来精制茶树的精油。此处检查了对人体THP1和鼠Raw264.7髓性白血病细胞系的免疫调节作用作为巨噬细胞样细胞的模型。首先,确定MAC水平不影响体外这些细胞系的存活或增殖。接下来,使用多重测定从骨髓细胞系检查脂多糖(LPS)诱导的细胞因子的产生(IL-6,TNFα,IL-10,GM-CSF,IL-3)。通过Mac显着抑制由细胞系产生的许多LPS诱导的细胞因子。接近MAC作用机制的检查表明,它抑制了LPS诱导的IκB磷酸酯和核因子(NF)-Kappa发信息和易位的激活,抑制INOS蛋白表达和没有生产。这些结果表明,MAM通过抑制NF-Kappa B信号激活和通过巨噬细胞样细胞系的细胞因子产生水平来施加免疫调节效果。 Crown版权所有(c)2015由elestvier b.v出版。保留所有权利。

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