神经药理学报 ›› 2017, Vol. 7 ›› Issue (1): 29-37.DOI: 10.3969/j.issn.2095-1396.2017.01.004

• 实验方法学 • 上一篇    下一篇

激发时间与哮喘小鼠气道炎症及气道重塑关系的实验研究

王明磊,王文革,张俊红   

  1. 1. 河北北方学院,河北张家口,075000,中国
    2. 中国人民解放军空军总医院儿科,北京,100142,中国
  • 出版日期:2017-02-26 发布日期:2017-12-01
  • 通讯作者: 王文革,女,博士,副主任医师,硕士生导师;研究方向:儿童哮喘;E-mail:1264516006@qq.com
  • 作者简介:王明磊,女,硕士研究生;研究方向:儿童哮喘的发病机制;E-mail:wangml2015@126.com
  • 基金资助:

    中国人民解放军空军总医院课题基金(No.KZ2014005)

Effects of Different Challenging Time on Airway Inflammation and Airway Remodeling of an Asthmatic Mouse Model

WANG Ming-lei,WANG Wen-ge,ZHANG Jun-hong   

  1. 1. Department of Postgraduates,Hebei North University,Zhangjiakou,075000,China
    2. Department of Paediatrics,Air Force General Hospital of People’ s Liberation Army,Beijing,100142,China
  • Online:2017-02-26 Published:2017-12-01
  • Contact: 王文革,女,博士,副主任医师,硕士生导师;研究方向:儿童哮喘;E-mail:1264516006@qq.com
  • About author:王明磊,女,硕士研究生;研究方向:儿童哮喘的发病机制;E-mail:wangml2015@126.com
  • Supported by:

    中国人民解放军空军总医院课题基金(No.KZ2014005)

摘要: 目的:采用不同激发时间构建小鼠哮喘模型,研究不同激发时间对哮喘小鼠模型气道炎性反应、气道重塑性变化及白介素17(interleukin-17,IL-17)水平的影响。方法:以卵清蛋白(ovalbumin,OVA)作为变应原,采用腹腔注射致敏联合雾化激发的方法制备小鼠哮喘模型。4 周龄的SPF 级BALB/c 小鼠分为激发3 d 组、激发6 d 组和激发12 d 组,每组8 只,分别设置对照组。末次激发24 h 后牺牲小鼠,留取支气管肺泡灌洗液(bronchoalveolar lavage fluid,BALF),检测BALF 中IL-17 的水平,计数嗜酸性粒细胞(eosinophilic granulocyte,EOS)百分比及中性粒细胞(neutrophile granulocyte,NEU)百分比;取部分肺组织行病理学切片,HE 染色观察肺组织炎性细胞浸润情况;AB-PAS 染色观察杯状细胞增生及黏液分泌情况;Masson 染色观察气道上皮下胶原沉积及平滑肌增生的情况。结果:4 周龄小鼠激发3 d 后即出现了典型的哮喘气道炎症反应,小鼠肺组织炎症评分、BALF 中NEU% 及EOS% 等炎症指标较对照组明显增加(P?0.01)。激发6 d 后,以上气道炎症指标较激发3 d 组继续增高(P?0.01)。激发12 d 的气道炎症评分及EOS% 虽然高于激发3 d 组,但与激发6 d 组相比差异无显著性(P>0.05)。三组的NEU% 及杯状细胞染色面积/ 管腔基底膜周径(Wag/Pbm)依次增高(P?0.01)。气道周围胶原蛋白沉积厚度(Wcol/Pbm)及气道平滑肌厚度(WAm/Pbm)的增加在激发6 d 后可被观察到,激发12 d 后增生程度更为明显,差异具有统计学意义(P?0.01)。三组小鼠BALF 中IL-17 的水平呈逐渐升高的趋势(P?0.01)。结论:哮喘的发作特点及发病机制具有一定的异质性,不同的激发时间可能导致不同病理表型的哮喘发作。制备哮喘模型用于哮喘研究时,需要根据研究目的的不同合理选择激发时间,以制备出更符合人类哮喘发病规律的小鼠模型。

关键词: 哮喘, 小鼠模型, 激发时间, 气道炎症, 气道重塑

Abstract: Objective:To establish an asthmatic mouse model with different challenging times,to evaluate the effects of different challenging time on murine asthmatic airway inflammation,airway remodeling and the level of interleukin-17 (IL-17). Methods:Ovalbumin(OVA) was used as an allergen to sensitize and challenge the murines. Forty-eight female specific-free (SPF) BALB/c mice aged four weeks were randomly divided into 6 groups according to challenging time length:3 days group,6 days group,12 days group,and each set of normal control group. Mice were sacrificed after the last 24 hours allergen challenge. Bronchoalveolar lavage fluid (BALF) was collected for leukocytes count analysis. IL-17 levels in BALF supernatant were analyzed by enzyme-linked immunosorbent assay (ELISA). For histopathological examination,HE staining was used to measure the infiltration of inflammatory cells,AB-PAS was used to measure the hyperplasia of goblet cells and mucin,Masson staining was used to measure collagen deposition. Goblet cell area (Wag),smooth muscle area (Wam), collagen area (Wcol),and the perimeter of bronchial basemen membrane (Pbm) were recorded. Results:4 weeks mice can appear typical asthma airway inflammation reaction after 3 days’ challenge,the inflammation scores and inflammatory markers such as total number of leukocytes were significant elevated compared with controls (P?0.01). 6 days challenging time later, the inflammation scores and inflammatory markers continued to increase compared with 3 challenging days group (P<0.01). For 12 challenging days group,the inflammation scores and the percentage of eosinophils were elevated compared with 3 challenging days group (P<0.01), but there were no statistically significant differences between 12 challenging days group and 6 challenging days group (P>0.05). The percentage of neutrophils and the staining area of goblet cells in the 3 groups were increased in turn significant (P<0.01). Collagen deposition around the airway and the increase of airway smooth muscle mass can be observed after 6 days’ challenge, the hyperplasia degree were significant increased after 12 days’ challenging (P<0.01). The levels of IL-17 in the 3 groups were elevated in turn significant (P<0.01). Conclusions:The characteristics and pathogenesis of asthma have certain heterogeneity,different challenging time may lead to different pathological asthmatic phenotypes. It is necessary to select reasonable challenging time according to different research purpose when we prepare asthma models.

Key words: asthma, mouse modelchallenging time, airway inflammation, airway , remodeling

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