变应性鼻炎小鼠鼻黏膜中半乳糖凝集素3和9的表达

目的 探讨小鼠鼻黏膜内半乳糖凝集素3(galectin-3)和半乳糖凝集素9(galectin-9)的表达水平及其与变应性鼻炎的关系.方法 20只BALB/c小鼠随机分为变应性鼻炎组(AR组)和对照组,每组10只.AR组分别于第1天和第14天腹腔注射含卵清蛋白10μg及氢氧化铝2 mg的生理盐水悬液0.1ml,第21天起鼻腔给予1%卵清蛋白局部激发,持续7 d;对照组用生理盐水代替卵清蛋白.通过免疫组织化学染色和逆转录-聚合酶链反应(RT-PCR)检测鼻黏膜中galectin-3和galectin-9 的表达,同时采用酶联免疫吸附测定法(ELISA)检测外周血中自细胞介素4(IL-4)、白细胞介素5(IL-5)及γ干扰素(IFN-γ)的表达.结果 AR组和对照组均有galectin-3和galectin-9蛋白及mRNA的表达,AR组表达强度高于对照组,差异具有统计学意义(t值分别为11.18、9.261、7.667和6.971,P值均＜0.05).与对照组相比,AR组小鼠外周血中IL-4和IL-5含量均有不同程度的增高(t值分别为7.202和8.121,P值均＜0.05),而IFN-γ含量则下降(t=-11.94,P＜0.05).galectin 3和galectin 9 mRNA的表达强度与外周血中IL-4、IL-5的含量呈正相关(r值分别为0.667、0.847、0.720及0.736,P值均＜0.05),与IFN-γ含量呈负相关(r值分别为-0.528和-0.817,P值均＜0.05).结论 galectin 3和galectin 9可能在变应性鼻炎的发病过程中发挥一定作用.

Expression and significance of galectin-3 and galectin-9 in mice nasal mucosa with allergic rhinitis

OBJECTIVE: To evaluate the expression of galectin-3 and galectin-9 in mice nasal mucosa,and to explore the role of galectin-3 and galectin-9 in allergic rhinitis (AR). METHODS: Twenty mice were randomly divided into AR group and control group, 10 mice in each group. Ten mice of BALB/c were sensitized intraperitoneally with 10 microg of ovalbumin(OVA) adsorbed onto 2 mg Al(OH)3 on day 1 and day 14. Mice was induced daily by intranasal daily administration of 10 microl of saline containing 100 microg of OVA from day 21 to day 28. OVA was replaced with saline in control group. Immunohistochemical staining was used to examine the expression of galectin-3 and galectin-9 in nasal mucosa. RT-PCR was performed to investigate the level of mRNA expression of complement galectin-3, galectin-9. The level of IL-4, IL-5 and IFN-gamma in peripheral blood were titrated by ELISA. RESULTS: Galectin-3 and galectin-9 were detected in both groups. Expression of galectin-3 and galectin-9 in group AR was higher than that in control group. Pearson correlation analysis demonstrated that the levels of galectin-3 and galectin-9 were positively correlated with the level of IL-4 and IL-5, but negatively correlated with the level of IFN-gamma. CONCLUSIONS: Galectin-3 and galectin-9 might play an important role in the pathogenesis of allergic rhinitis.