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首页> 外文期刊>Cytokine >Tumor necrosis factors in a murine model of allergic peritonitis: effects on eosinophil accumulation and inflammatory mediators' release.
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Tumor necrosis factors in a murine model of allergic peritonitis: effects on eosinophil accumulation and inflammatory mediators' release.

机译:变应性腹膜炎小鼠模型中的肿瘤坏死因子:对嗜酸性粒细胞积累和炎性介质释放的影响。

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摘要

In allergic disorders, the role of tumor necrosis factors (TNF) is not well established. We investigated the role of TNF in allergic peritonitis induced by ovalbumin (OVA) challenge in double TNF (TNF-alpha(-/-)/lymphotoxin-alpha(-/-)) knock out (TNF-KO) mice. In the peritoneal lavage of TNF-KO mice, mast cell number and histamine level (radioenzymatic assay) were similar to that in wild type (WT) mice. TNF-alpha (ELISA) and histamine were increased 1 h after challenge in WT mice. However, three days later eosinophil number and eosinophil peroxidase (EPO) levels (colorimetric-enzymatic assay) were found to be lower in TNF-KO mice. A second challenge three days after the first, increased EPO, histamine and IL-6 (ELISA) but did not alter eosinophil and mast cell numbers in both types of mice. On the other hand histamine and IL-6 were higher, while EPO was lower in TNF-KO mice. In conclusion, our findings show that TNF is involved in eosinophil accumulation and inflammatory mediators' release in a murine model of allergy.
机译:在过敏性疾病中,肿瘤坏死因子(TNF)的作用尚不明确。我们调查了TNF在卵清蛋白(OVA)激发的双重TNF(TNF-alpha(-/-)/ lymphotoxin-alpha(-/-))敲除(TNF-KO)小鼠中引起的过敏性腹膜炎中的作用。在TNF-KO小鼠的腹腔灌洗中,肥大细胞数量和组胺水平(放射酶测定)与野生型(WT)小鼠相似。 WT小鼠攻击后1小时,TNF-α(ELISA)和组胺增加。然而,三天后,发现TNF-KO小鼠的嗜酸性粒细胞数量和嗜酸性粒细胞过氧化物酶(EPO)水平较低(比色酶法)。第一次攻击三天后的第二次挑战是,两种类型的小鼠的EPO,组胺和IL-6(ELISA)均升高,但并未改变嗜酸性粒细胞和肥大细胞的数量。另一方面,TNF-KO小鼠中组胺和IL-6较高,而EPO较低。总之,我们的研究结果表明,在鼠类变态反应模型中,TNF参与了嗜酸性粒细胞的积累和炎症介质的释放。

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