首页> 外文期刊>Cellular immunology >Mountain cedar pollen induces IgE-independent mast cell degranulation, IL-4 production, and intracellular reactive oxygen species generation.
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Mountain cedar pollen induces IgE-independent mast cell degranulation, IL-4 production, and intracellular reactive oxygen species generation.

机译:雪松花粉诱导不依赖IgE的肥大细胞脱粒,IL-4产生和细胞内活性氧生成。

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摘要

Cedar pollens cause severe allergic disease throughout the world. We have previously characterized allergenic pollen glycoproteins from mountain cedar (Juniperus ashei) that bind to allergen-specific immunoglobulin E (IgE). In the present report, we investigated an alternative pathway of mast cell activation by mountain cedar pollen extract through IgE-independent mechanisms. We show that mountain cedar pollen directly induces mast cell serotonin and IL-4 release and enhances release induced by IgE cross-linking. Concomitant with mediator release, high levels of intracellular reactive oxygen species (ROS) were generated, and both ROS and serotonin release were inhibited by anti-oxidants. These findings suggest that alternative mechanisms exist whereby pollen exposure enhances allergic inflammatory mediator release through mechanisms that involve ROS. These mechanisms have the potential for enhancing the allergenic potency of pollens.
机译:雪松花粉在全世界引起严重的过敏性疾病。我们以前已经表征了来自雪松(Juniperus ashei)的过敏原花粉糖蛋白,该蛋白与过敏原特异性免疫球蛋白E(IgE)结合。在本报告中,我们调查了山杉花粉提取物通过IgE独立机制激活肥大细胞的另一种途径。我们显示山杉花粉直接诱导肥大细胞血清素和IL-4释放,并增强IgE交联诱导的释放。伴随着介质释放,产生了大量的细胞内活性氧(ROS),并且抗氧化剂抑制了ROS和5-羟色胺的释放。这些发现表明存在替代机制,其中花粉暴露通过涉及ROS的机制增强了过敏性炎症介质的释放。这些机制具有增强花粉变应原效力的潜力。

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