平喘方对哮喘模型小鼠肺组织炎症及γ干扰素和白细胞介素4的影响  

Effects of Chinese herbal medicine Pingchuan Formula on airway inflammation,interferon-γand interleukin-4 in mice with asthma

作　　者：赵毅涛[1,2] 张新光[1,3] 白莉[1,3] 李利清[1,3] 虞坚尔[1,3] 

机构地区：[1]上海中医药大学上海市中医医院儿科,上海200071 [2]广东省中医院儿科,广东广州510120 [3]上海市中医药研究院中医儿科研究所,上海200071

出　　处：《中西医结合学报》2012年第7期807-813,共7页Journal of Chinese Integrative Medicine

基　　金：国家自然科学基金资助项目(No.30873286;81173302);国家临床重点专科建设资助项目

摘　　要：目的:研究1型辅助性T细胞(T helper1)/Th2(Th1/Th2)相关因子γ干扰素(interferon-γ,IFN-γ)和白细胞介素4(interleukin-4,IL-4)在哮喘模型小鼠气道炎症进展过程中的改变以及中药平喘方对其的影响,探讨平喘方对支气管哮喘防治作用的机制。方法:80只BALB/c小鼠随机分为空白对照组、哮喘模型组、地塞米松组及平喘方组,20只/组。除空白对照组外,其余大鼠采用卵清白蛋白致敏、激发诱导支气管哮喘,并均于致敏2周后开始灌胃,1次/d,共4周。于激发7d后和激发后2周分批处死小鼠,收集支气管肺泡灌洗液(bronchoalveo larlavage fluid,BALF)和肺组织。经苏木精和伊红染色、胶原染色检测肺组织病理学改变,并进行胶原染色图像分析;酶联免疫吸附测定法检测BALF中IFN-γ及IL-4水平。结果:激发7d后:与空白对照组比较,模型组BALF中IFN-γ水平明显降低,IL-4水平明显升高;与模型组比较,两治疗组IL-4水平均明显降低,IFN-γ/IL-4比值均明显升高;两治疗组间IFN-γ、IL-4水平和IFN-γ/IL-4比值比较,差异均无统计学意义。激发后2周:与空白对照组比较,模型组IFN-γ水平明显降低,而IL-4水平明显升高,IFN-γ/IL-4比值明显降低;与模型组比较,两治疗组的IL-4水平明显降低,IFN-γ/IL-4比值明显升高,且平喘方组IFN-γ水平明显升高;两治疗组间IFN-γ、IL-4水平及IFN-γ/IL-4比值比较,差异均无统计学意义。哮喘激发7d后及激发后2周,模型组肺组织胶原染色面积、面积与光密度乘积均较空白对照组明显增加;两治疗组细支气管壁上胶原纤维沉积较模型组明显减少,胶原染色面积与光密度乘积亦较模型组明显降低;两治疗组间胶原染色面积、面积与光密度乘积比较,差异均无统计学意义。结论:平喘方可调节哮喘模型小鼠IFN-γ、IL-4水平,改善气道炎症,抑制气道重建,疗效与地塞米松相近。OBJECTIVE： To observe the changes of interferon-3, （IFN-γ） and interleukin-4 （IL-4）, factors related to T helper 1/T helper 2 （Th1/Th2）, in airway inflammation in an asthmatic model of mice and the effects of Pingchuan Formula （PCF）, a compound traditional Chinese herbal medicine. METHODS： Eighty BALB/c mice were randomly divided into normal group, model group, dexamethasone group and PCF group, with 20 mice in each group. For inducing asthma, the BALB/c mice were sensitized by intraperitoneal injection of mixed ovalbumin, and then activated by inhaling ovalbumin. After 2 weeks of sensitizing, asthmatic mice were intragastrically administered with the drugs once a day for four weeks. Bronchoalveolar lavage fluid （BALF） and lung tissue were collected respectively after 7-day activation or 2 weeks after activation. The general histological changes were observed by hematoxylin and eosin staining and collagen staining, meanwhile the levels of IFN-γ and IL-4 in BALF were detected by enzyme-linked immunosorbent assay. RESULTS： After 7 d of activation, compared with the normal group, significant decrease in IFN-γ and increase in IL-4 were detected in the model group; compared with the model group, IL-4 level of the two treated groups was decreased and the IFN-γ/IL-4 ratio was increased significantly; no significant difference was found between the two treated groups. Two weeks after activation, compared with the normal group, IFN-γ, was decreased, IL-4 was increased, and the IFN-γ/IL-4 ratio was decreased in the model group; compared with the model group, IL-4 level in the dexamethasone group was significantly decreased and IFN- γ/IL-4 ratio was significantly elevated, while the level of IL-4 in the PCF group was significantly decreased, the level of IFN-γ was increased simultaneously, and the IFN-γ/IL-4 ratio was significantly elevated. There was no significant difference between the two treated groups in IFN-γ and IL-4 levels, nor in the IFN-γ/IL-4 ratio. The area of collagen fiber

关 键 词：支气管哮喘 中草药 Γ干扰素 白细胞介素4 TH1细胞 TH2细胞 小鼠 

分 类 号：R285.5[医药卫生—中药学]