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首页> 外文期刊>Journal of Translational Medicine >Metformin attenuates silica-induced pulmonary fibrosis via AMPK signaling
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Metformin attenuates silica-induced pulmonary fibrosis via AMPK signaling

机译:二甲双胍通过AMPK信号传导衰减二氧化硅诱导的肺纤维化

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Silicosis is one of the most common occupational pulmonary fibrosis caused by respirable silica-based particle exposure, with no ideal drugs at present. Metformin, a commonly used biguanide antidiabetic agent, could activate AMP-activated protein kinase (AMPK) to exert its pharmacological action. Therefore, we sought to investigate the role of metformin in silica-induced lung fibrosis. The anti-fibrotic role of metformin was assessed in 50?mg/kg silica-induced lung fibrosis model. Silicon dioxide (SiO2)-stimulated lung epithelial cells/macrophages and transforming growth factor-beta 1 (TGF-β1)-induced differentiated lung fibroblasts were used for in vitro models. At the concentration of 300?mg/kg in the mouse model, metformin significantly reduced lung inflammation and fibrosis in SiO2-instilled mice at the early and late fibrotic stages. Besides, metformin (range 2–10?mM) reversed SiO2-induced cell toxicity, oxidative stress, and epithelial-mesenchymal transition process in epithelial cells (A549 and HBE), inhibited inflammation response in macrophages (THP-1), and alleviated TGF-β1-stimulated fibroblast activation in lung fibroblasts (MRC-5) via an AMPK-dependent pathway. In this study, we identified that metformin might be a potential drug for silicosis treatment.
机译:矽肺是由可吸入二氧化硅颗粒暴露引起的最常见的职业肺纤维化之一,目前没有理想的药物。二甲双胍,常用的双胍抗糖尿病剂,可以激活AMP活化的蛋白激酶(AMPK)施加其药理作用。因此,我们试图探讨二甲双胍在二氧化硅诱导的肺纤维化中的作用。在50μmMg/ kg二氧化硅诱导的肺纤维化模型中评估二甲双胍的抗纤维化作用。二氧化硅(SiO 2) - 刺激肺上皮细胞/巨噬细胞和转化生长因子-β1(TGF-β1)诱导的分化肺成纤维细胞用于体外模型。在小鼠模型中浓度为300μmg/ kg,在早期和晚期纤维化阶段,二甲双胍显着降低了SiO2滴注小鼠的肺炎和纤维化。此外,二甲双胍(2-10×mm)反转SiO2诱导的细胞毒性,氧化应激和上皮 - 间充质过渡过程(A549和HBE),抑制巨噬细胞(THP-1)的炎症反应,并减轻了TGF通过AMPK依赖性途径刺激肺成纤维细胞(MRC-5)中的成纤维细胞活化。在这项研究中,我们发现二甲双胍可能是矽肺治疗的潜在药物。

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