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首页> 外文期刊>Cytokine >Acute phase mediator oncostatin M regulates affinity of alpha(1)-protease inhibitor for concanavalin A in hepatoma-derived but not lung-derived epithelial cells.
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Acute phase mediator oncostatin M regulates affinity of alpha(1)-protease inhibitor for concanavalin A in hepatoma-derived but not lung-derived epithelial cells.

机译:急性阶段介导的抑瘤素M调节肝癌来源的上皮细胞中α(1)-蛋白酶抑制剂对伴刀豆球蛋白A的亲和力。

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摘要

Quantitative changes in plasma protein concentrations during tissue injury or inflammation (acute phase response) are often accompanied by specific alterations in the carbohydrate moieties of these proteins. The glycosylation changes comprise alterations in the type of branching of the carbohydrate structures as revealed by modulated reactivity of acute phase glycoproteins with the lectin concanavalin A. Interestingly, inflammation-induced changes in the glycosylation of acute phase proteins have been shown to affect the functional properties of these proteins. In this study we demonstrate that synthesis of acute phase protein alpha(1)-PI, the controlling inhibitor of neutrophil elastase, is significantly up-regulated in hepatic and lung-derived epithelial cells by the inflammatory mediator oncostatin M. Although oncostatin M markedly altered the concanavalin A reactivity of hepatic alpha(1)-PI, lung-derived epithelial cells did not change the pattern of alpha(1)-PI glycan branching upon stimulation with oncostatin M. These results indicate that inflammation-induced changes in glycosylation of alpha(1)-PI may have different impacts on functional properties of liver and lung-synthesized alpha(1)-PI.
机译:在组织损伤或炎症(急性期反应)期间血浆蛋白浓度的定量变化通常伴随着这些蛋白的碳水化合物部分的特定变化。糖基化改变包括碳水化合物结构分支类型的改变,如急性期糖蛋白与凝集素伴刀豆球蛋白A的反应性调节所揭示的。有趣的是,炎症诱导的急性相蛋白质糖基化变化已显示出会影响功能特性。这些蛋白质。在这项研究中,我们证明了炎症介质oncostatin M在肝和肺源性上皮细胞中急性中性粒细胞弹性蛋白酶的控制抑制剂急性期蛋白α(1)-PI的合成明显上调。尽管oncostatin M明显改变刀豆蛋白A刺激肝脏α(1)-PI的肺伴上皮细胞的伴刀豆球蛋白A反应性没有改变α(1)-PI聚糖分支的模式。这些结果表明炎症诱导的α糖基化改变(1)-PI对肝脏和肺合成的alpha(1)-PI的功能特性可能有不同的影响。

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