加味芎蝎散对咳嗽变异性哮喘大鼠气道平滑肌组织表型转化的干预作用研究Phenotype Transformation of Airway Smooth Muscle Tissue in CVA Rats and the Intervention of Jiawei Xiongxie Decoction
孙洮玉,徐荣谦,方顺顺,张子薇,杨斌
摘要(Abstract):
目的观察咳嗽变异性哮喘大鼠气道平滑肌细胞表型转化及加味芎蝎散的干预作用。方法将雄性SD大鼠40只随机分为空白对照组、模型组、加味芎蝎散组(中药组)、孟鲁司特钠组,每组10只,除正常对照组外,其余组采用腹腔注射卵蛋白法制备咳嗽变异性哮喘大鼠模型。各组造模后予相应药液灌胃。给药4周后,取肺组织HE染色,光镜下观察气道结构改变,Masson染色测量气道基底膜下纤维化率、标准化气道平滑肌厚度及支气管壁厚度,电子显微镜观察气道平滑肌组织超微结构改变;免疫组化法检测气道平滑肌组织中收缩和分泌蛋白表达。结果与空白对照组比较,模型组气道平滑肌层增生、肥厚,气道平滑肌细胞内肌丝减少,粗面内质网及核糖体等分泌颗粒增多,平滑肌α肌动蛋白和钙调蛋白表达降低。与模型组相比,中药组有明显的缓解作用。结论咳嗽变异性哮喘大鼠气道平滑肌可由"收缩表型"向"分泌表型"转化,而加味芎蝎散能明显减低CVA气道平滑肌增生,抑制气道重塑,其机制可能与逆转气道平滑肌细胞表型转化有关。
关键词(KeyWords): 咳嗽变异性哮喘;气道平滑肌;表型转化;加味芎蝎散;大鼠
基金项目(Foundation): 国家自然科学基金项目(81704120);; 北京中医药大学东直门医院青苗人才培养计划(2018年度)
作者(Author): 孙洮玉,徐荣谦,方顺顺,张子薇,杨斌
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