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首页> 外文期刊>Cytokine >Endogenous IL-18 in experimentally induced asthma affects cytokine serum levels but is irrelevant for clinical symptoms.
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Endogenous IL-18 in experimentally induced asthma affects cytokine serum levels but is irrelevant for clinical symptoms.

机译:实验性哮喘中的内源性IL-18影响细胞因子血清水平,但与临床症状无关。

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摘要

T cells and T cell derived cytokines are involved in the complex pathogenesis of asthma. The role of the cytokine IL-18 however, is not clearly defined so far. On the one hand side IL-18 induces Th1-type cytokines and thereby might counter-regulate Th2-mediated allergic asthma. On the other hand IL-18 also bears pro-inflammatory effects possibly enhancing experimental asthma. In order to elucidate the role of IL-18 in allergic pulmonary inflammation typical symptoms were compared after induction of experimental asthma in IL-18(-/-) and in wild type mice. Asthma was induced using ovalbumin (OVA) as allergen for sensitization and challenge. Sham sensitized and OVA challenged mice served as controls. Bronchoalveolar lavage-fluid cytology, leukocyte infiltration in lung tissues, serum levels of OVA-specific IgE and cytokines, and lung function were analyzed. Clear differences could be observed between control and asthmatic mice, both in wild type and IL-18(-/-) animals. Surprisingly, no differences were found between asthmatic wild type and IL-18(-/-) mice. Thus, in contrast to conflicting data in the literature IL-18 did not suppress or enhance the pulmonary allergic immune response in a murine experimental model of asthma.
机译:T细胞和T细胞衍生的细胞因子参与哮喘的复杂发病机理。迄今为止,尚不清楚细胞因子IL-18的作用。一方面,IL-18诱导Th1型细胞因子,从而可能反调节Th2介导的过敏性哮喘。另一方面,IL-18还具有促炎作用,可能增强实验性哮喘。为了阐明IL-18在过敏性肺部炎症中的作用,在IL-18(-/-)和野生型小鼠中诱发实验性哮喘后,比较了典型症状。使用卵清蛋白(OVA)作为致敏和激发作用的过敏原诱发哮喘。假致敏和OVA攻击的小鼠作为对照。分析了支气管肺泡灌洗液的细胞学,肺组织中的白细胞浸润,OVA特异性IgE和细胞因子的血清水平以及肺功能。在野生型和IL-18(-/-)动物中,对照组和哮喘小鼠之间都可以观察到明显的差异。令人惊讶的是,哮喘野生型和IL-18(-/-)小鼠之间没有发现差异。因此,与文献中矛盾的数据相反,在小鼠的哮喘实验模型中,IL-18没有抑制或增强肺部过敏性免疫应答。

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