变应性鼻炎小鼠鼻黏膜白细胞介素-9及其受体mRNA表达水平的研究

目的　探讨白细胞介素9（interleukin-9，IL-9）及其受体IL-9R mRNA在变应性鼻炎小鼠鼻黏膜中的表达及其作用。方法　SPF级Balb/c小鼠16只，随机分为两组，每组8只。实验组卵清蛋白致敏建立变应性鼻炎小鼠模型；对照组使用生理盐水替代。每组随机取4只小鼠，病理检查证明造模成功。每组剩余4只小鼠取其鼻黏膜，实时定量PCR检测小鼠鼻黏膜中IL-9及IL-9R mRNA表达水平。结果  IL-9及IL-9R mRNA在对照组以及实验组中均有表达，实验组小鼠鼻黏膜中IL-9及IL-9R mRNA表达水平均高于对照组（P＜0.05）。小鼠鼻黏膜中IL-9 mRNA表达水平与IL-9RmRNA表达水平呈正相关（r =0.857，P＜0.05）。结论　IL-9及其受体IL-9R参与了变应性鼻炎发生发展中，并起到重要作用，该结果为进一步了解变应性鼻炎发病机制提供了新的视角，为变应性鼻炎靶向药物治疗提供新的线索。

Expression of IL-9 and its receptor mRNA in nasal mucosa of allergic rhinitis mice

OBJECTIVE To investigate the expression and roles of IL-9 and its receptor (IL-9R) mRNA in the nasal mucosa of ovalbumin-induced allergic rhinitis (AR) mice. METHODS Sixteen Balb/c mice were selected and randomly divided into two groups with 8 mice in each group. Mice were used for establishing the animal model of AR with ovalbumin sensitization as AR group, at the same time, the physiological saline as the control group. In each group, 4 mice were randomly taken from each group, and the pathological examination showed that the model was successful. The nasal mucosa was taken from the remaining 4 mice in each group and then to detect IL-9 and IL-9R mRNA in nasal mucosa of the two groups by using real-time quantitative PCR. RESULTS The expression of IL-9 and IL-9R mRNA could be detected in both the control and AR groups. The expression levels of IL-9 and IL-9R mRNA in the nasal mucosa of the AR group were both higher than that in the control group (P<0.05). The expression level of IL-9 mRNA was positively correlated with the expression of IL-9R mRNA in the nasal mucosa of mice (r =0.857, P<0.05). CONCLUSION IL-9 and its receptor IL-9R are involved in the development of AR, and play an important role in the development of allergic rhinitis. It provides a new perspective for the further understanding of the pathogenesis of AR and provides a new clue for the treatment of allergic rhinitis.