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首页> 外文期刊>Archives of Toxicology >Carbon nanotubes and crystalline silica stimulate robust ROS production, inflammasome activation, and IL-1 secretion in macrophages to induce myofibroblast transformation
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Carbon nanotubes and crystalline silica stimulate robust ROS production, inflammasome activation, and IL-1 secretion in macrophages to induce myofibroblast transformation

机译:碳纳米管和结晶二氧化硅刺激巨噬细胞中的稳健的ROS生产,炎症激活和IL-1分泌,诱导肌纤维细胞转化

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Pulmonary exposure to inhaled particulates elicits complex inflammatory and fibrotic responses that may progress to chronic fibrosis. The fibrogenic potentials of respirable particulates are influenced by their physicochemical properties and their interactions with major pathways to drive fibrotic development in the lung. Macrophages were exposed to six carbon nanotubes (CNTs) of varying dimensions, crystalline silica, or carbon black (CB), with lipopolysaccharide (LPS) and transforming growth factor (TGF)-1 as positive controls. Macrophage-conditioned media was collected and applied to cultures of human pulmonary fibroblast line WI38-VA13 to induce myofibroblast transformation. Multi-walled and single-walled CNTs (MWCNTs and SWCNTs, respectively) and silica, but not CB, stimulated robust myofibroblast transformation through macrophage-conditioned media. On an equal weight basis, MWCNTs induced higher induction than SWCNTs. High induction was observed for MWCNTs with a long and slender or a short and rigid shape, and silica, atlevelscomparable to those by LPS and TGF-1. Fibrogenic particulates induced high levels of IL-1 mRNA expression and protein secretion that are required for macrophage-guided myofibroblast transformation. Induction of IL-1 is dependent on the activation of the NLRP3 (NOD-like receptor family, pyrin domain containing 3) inflammasome and ROS (reactive oxygen species) production in macrophages, as inhibition of NLRP3 by MCC950 and reduction of ROS production by N-acetylcysteine blocked NLRP3 activation,IL-1 induction, and fibroblast activation anddifferentiation. Therefore, fibrogenic CNTs and silica, but not CB, elicit robust macrophage-guided myofibroblast transformation, which depends on the induction of IL-1 through the NLRP3 inflammasome pathway andthe increased production of ROS in macrophages.
机译:肺部暴露于吸入的颗粒物引发复杂的炎症和纤维化反应,可能对慢性纤维化进行。可吸入颗粒物的纤纤潜力受其物理化学性质的影响及其与主要途径的相互作用,以驱动肺部纤维化发育。巨噬细胞暴露于不同尺寸,结晶二氧化硅或炭黑(Cb)的六个碳纳米管(CNT),用脂多糖(LPS)和将生长因子(TGF)-1转化为阳性对照。收集巨噬细胞条件培养基并应用于人肺成纤维细胞线Wi38-Va13的培养物,诱导肌纤维细胞转化。多壁和单壁的CNT(分别)和二氧化硅,但不是CB,通过巨噬细胞调节培养物刺激了稳健的肌纤维细胞转化。在相等的重量基础上,MWCNT诱导比SWCTS更高的诱导。对于具有长而细长或短且刚性的形状的MWCNT和刚性和刚性的晶状体,与LPS和TGF-1的离散性可分离,观察到高诱导。纤维纤维颗粒诱导巨噬细胞引导肌纤维细胞转化所需的高水平IL-1 mRNA表达和蛋白质分泌。 IL-1的诱导取决于巨噬细胞中NLRP3(NOD样受体家族,吡隆结构域)炎症组和ROS(反应性氧物质)产生的活化,作为MCC950的NLRP3的抑制,并通过N减少ROS生产 - 乙酰琥珀酸丁基胞嘧啶阻断NLRP3活化,IL-1诱导和成纤维细胞活化和成纤维化。因此,纤维原CNTs和二氧化硅,但不是Cb,引发鲁棒巨噬细胞引导的肌纤维细胞转化,这取决于IL-1通过NLRP3炎症途径的诱导和巨噬细胞的ROS增加。

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