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Expression of Leukemia Inhibitory Factor in Airway Epithelial Tissue of Asthmatic Rats

机译:哮喘大鼠气道上皮组织中白血病抑制因子的表达

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In order to investigate the expression of leukemia inhibitory factor (LIF) in airway epithelial tissues of normal and asthmatic rats, the influence of dexamethasone and the role of LIF in pathogenesis of asthma, 30 Sprague-Dawley (SD) rats were randomly divided into 3 groups (10 for each group): normal group, asthma model group, and dexamethasone-interfered group. In asthma model group and dexamethasone-interfered group, asthma rat models were established by intraperi-toneal (i.p.) injection of 10% ovalbumin (OVA) and challenge with 1% OVA via inhalation. Rats in dexamethasone-interfered group were pretreated with dexamethasone (2 mg/kg, i.p) 30 min before each challenge. The expression of LIF protein in lung was detected by immunohistochemistry. The results showed that LIF protein was mainly expressed in cytoplasm of bronchial epithelial cells. The expression of LIF protein in the airway epithelial tissue of asthma model group was significantly higher than that in normal group and dexamethasone-interfered group (P< 0.01), but there was no significant difference between normal group and dexamethasone-interfered group (P> 0.05). It was concluded that the expression of LIF was increased significantly in the airway epithelial tissue of the asthma rats, and dexamethasone could down-regulate the expression of LIF. It was suggested that LIF might play an important role in the pathogenesis of asthma as an inflammation regulator.
机译:为了研究白血病抑制因子(LIF)在正常和哮喘大鼠气道上皮组织中的表达,地塞米松的影响以及LIF在哮喘发病中的作用,将30只Sprague-Dawley(SD)大鼠随机分为3只组(每组10个):正常组,哮喘模型组和地塞米松干预组。在哮喘模型组和地塞米松干预组中,通过腹膜内(i.p.)注射10%卵清蛋白(OVA)并通过吸入攻击1%OVA建立哮喘大鼠模型。地塞米松干预组的大鼠在每次攻击前30分钟用地塞米松(2 mg / kg,i.p)进行预处理。免疫组化法检测肺中LIF蛋白的表达。结果表明,LIF蛋白主要在支气管上皮细胞的细胞质中表达。哮喘模型组气道上皮组织中LIF蛋白的表达明显高于正常组和地塞米松干预组(P <0.01),而正常组和地塞米松干预组之间无明显差异(P> 0.01)。 0.05)。结论:哮喘大鼠气道上皮组织中LIF的表达明显升高,地塞米松可以下调LIF的表达。提示LIF作为炎症调节剂可能在哮喘的发病机理中起重要作用。

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