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首页> 外文期刊>Cytokine >The LIM-only protein FHL2 regulates interleukin-6 expression through p38 MAPK mediated NF-κB pathway in muscle cells
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The LIM-only protein FHL2 regulates interleukin-6 expression through p38 MAPK mediated NF-κB pathway in muscle cells

机译:仅LIM蛋白FHL2通过p38 MAPK介导的肌细胞NF-κB途径调节白介素6表达

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摘要

Interleukin 6 (IL-6) is pleiotropic cytokine playing an important role in inflammatory response. Other than classical immune tissues, IL-6 is also produced in muscle cells under specific conditions. Four-and-a-half LIM-only protein 2 (FHL2) is preferentially expressed in skeletal and cardiac muscle cells compared to other tissues indicating it has an important role in skeletal muscle and cardiovascular system. In this report, the regulation of IL-6 by FHL2 in muscle cells was investigated. We demonstrated that FHL2 overexpression increased IL-6 mRNA level and its protein secretion in skeletal myoblasts. In contrast, the IL-6 secretion was significantly decreased after FHL2-knockdown by siRNA in response to TNFα stimulation. We further showed that FHL2-mediated induction of IL-6 was regulated by the activation of IL-6 promoter through stimulating NF-κB and p38 MAPK signaling pathway. Our results further illustrated the molecular mechanisms of IL-6 production, which provides new insights in the roles of FHL2 in post-injury inflammation or cytoprotection of muscle cells.
机译:白介素6(IL-6)是多效性细胞因子,在炎症反应中起重要作用。除了经典的免疫组织,IL-6还在特定条件下在肌肉细胞中产生。与其他组织相比,仅四个半LIM蛋白2(FHL2)在骨骼肌和心肌细胞中优先表达,这表明它在骨骼肌和心血管系统中具有重要作用。在本报告中,研究了FHL2在肌肉细胞中对IL-6的调节作用。我们证明FHL2过表达增加骨骼肌成肌细胞中IL-6 mRNA水平及其蛋白分泌。相反,siRNA响应TNFα刺激FHL2敲低后,IL-6分泌显着降低。我们进一步表明,通过刺激NF-κB和p38 MAPK信号通路,IL-6启动子的激活可调节FHL2介导的IL-6诱导。我们的结果进一步阐明了IL-6产生的分子机制,这为FHL2在损伤后炎症或肌肉细胞的细胞保护中的作用提供了新的见解。

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