Redox Biol:研究进一步揭示退行性关节病骨关节炎发病机制

2017-09-08 Emma MedSci原创

骨关节炎(OA)是一种退行性关节病,也是最常见的关节炎之一,是一种非对称性、非炎症性、无全身性征象的疾病,也称退行性关节病、骨关节病或增生性关节炎。

骨关节炎(OA)是一种退行性关节病,也是最常见的关节炎之一,是一种非对称性、非炎症性、无全身性征象的疾病,也称退行性关节病、骨关节病或增生性关节炎。其特征是关节软骨发生原发性或继发性退行性改变,并在关节边缘有骨赘形成,病理变化以软骨变性及软骨下骨质病变为主。多发生在50岁以后,女性多于男性。最常受累的是膝、髋、手指、腰椎、颈椎等关节。虽然已表明PKR和MMP-13的表达升高在OA的发病中起关键作用,但是炎症刺激后PKR调控MMP-13的机制仍然未知。

研究人员探究了TNF-α刺激后PKR介导的MMP-13诱导的相关信号通路。研究结果表明,人软骨细胞中TNF-α诱导的PKR激活引发氧化应激介导的炎症和MMP-13,为相关药物和疗法的开发提供帮助。

从接受置换膝关节手术的OA患者获得膝关节软骨,软骨用于组织分析或软骨细胞分离。在损伤的OA软骨以及TNF-α刺激的软骨细胞中观察到PKR的上调表达。在TNF-α给药或使用poly(I:C)PKR活化后发现PKC(蛋白激酶C)的磷酸化,表明PKC受PKR调控。随后增加NADPH氧化酶的活性导致氧化应激积累和抗氧化能力下调,随后是过度炎症反应,COX-2和IL-8水平通过ERK / NF-κB途径升高。此外,活化的ERK途径也影响了PPAR-γ对MMP-13的抑制。

原始出处:
Ma CH, et al. PKR activation causes inflammation and MMP-13 secretion in human degenerated articular chondrocytes. Redox Biol. 2017 Aug 24;14:72-81. doi: 10.1016/j.redox.2017.08.011.

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    2017-12-26 lisa438
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    2017-12-11 sunylz
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    2017-09-11 186****0580(小山羊)

    学习了谢谢了

    0

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    2017-09-11 hfuym10906

    学习了学习了学习了学习了学习了...

    0

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    2017-09-10 lmm397
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    2017-09-08 1ddf0692m34(暂无匿称)

    学习了.好文章

    0

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