卵清蛋白(OVA)致敏联合烟熏法建立咳嗽变异型哮喘豚鼠模型
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中日友好医院中医肺病科 中日友好医院呼吸中心 国家呼吸疾病临床研究中心,北京 100029

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R-33


Establishment of a cough variant asthma guinea pig model induced by cigarette smoke exposure and OVA sensitization
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Pulmonary Disease Department, China-Japan Friendship Hospital, National Respiratory Disease Clinical Research Center, Beijing 100029, China

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    摘要:

    目的 尝试用卵清蛋白联合烟熏建立相似度更高的豚鼠 CVA 模型。 方法 选取 SPF 级雌雄各半豚鼠 24 只,随机分为空白对照组、OVA 致敏组与 OVA 致敏+烟熏组,共 3 组,每组 8 只豚鼠。 OVA 致敏 组以卵清蛋白致敏法造模,OVA 致敏+烟熏组以卵清蛋白致敏联合烟熏法造模,余方法一致。 检测 3 组受试豚鼠肺顺应性( Cydn) 、乙酰甲胆碱激发后气道阻力(RI) 、辣椒素激发后咳嗽次数与首次咳嗽时间、肺组织病 理及 Ashcroft 分级表评分指标变化,以评估模型。 结果 相较于空白对照组,OVA 致敏组与 OVA 致敏+烟熏 组 Cydn 明显下降、RI 明显上升、10 min 咳嗽次数明显增加、首次咳嗽时间明显提前、肺组织病理变化明显、 Ashcroft 分级表评分明显上升,以上表现均符合咳嗽变异型哮喘特征。 同时,相较于 OVA 致敏组,OVA 致敏+ 烟熏组在咳嗽症状及 RI 变化上有更好表现,更符合咳嗽变异型哮喘特征,这可能与降低 OVA 致敏浓度避免 免疫反应过度、烟熏增加咳嗽敏感性密切相关。 结论 用 OVA 致敏联合烟熏的方法能建立相似度跟高的咳 嗽变异型哮喘豚鼠模型。

    Abstract:

    Objective To establish a cough variant asthma (CVA) guinea pig model induced by cigarette smoke exposure and OVA sensitization. Methods Twenty-four specific pathogen-free guinea pigs were randomLy assigned to three experimental groups: control (n= 8), OVA (n= 8), and CS ( cigarette smoke) +OVA ( n= 8). Guinea pigs in the OVA group were sensitized with ovalbumin (OVA)and those in the CS+OVA group were sensitized with ovalbumin and exposed to cigarette smoke. At the end of experiment, airway resistance (RI) challenged by four doses of methacholine (0. 2 mL, 0. 4 mL, 0. 6 mL, 0. 8 mg / mL) and lung compliance (Cydn) were measured to determine airway hyper-responsiveness (AHR), and cough latency and the frequency of coughing challenged by capsaicin within 10 minutes were analyzed to evaluate symptoms. Hematoxylin and eosin staining and the Ashcroft score were used to observe the state of lung injury. Results Compared with the control group, RI, Ashcroft score, and the frequency of coughing in OVA and OVA+CS groups were increased significantly, and Cydn and cough latency were decreased significantly. Compared with the OVA group, the OVA+CS group had better performance in terms of cough symptoms and RI, which was more similar to the characteristics of cough variant asthma. This may be closely related to appropriate reduction of the OVA dose. Conclusions The CS+OVA guinea pig model is more consistent with the clinical features of cough variant asthma and can be used as an animal model of cough variant asthma.

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吕天宜,李得民,杨道文,程思益.卵清蛋白(OVA)致敏联合烟熏法建立咳嗽变异型哮喘豚鼠模型[J].中国比较医学杂志,2020,30(10):1~7.

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  • 收稿日期:2020-04-09
  • 在线发布日期: 2020-11-25
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